WO2019109750A1 - 一种操作识别装置、操作识别方法及具有该装置的智能终端 - Google Patents

一种操作识别装置、操作识别方法及具有该装置的智能终端 Download PDF

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Publication number
WO2019109750A1
WO2019109750A1 PCT/CN2018/111758 CN2018111758W WO2019109750A1 WO 2019109750 A1 WO2019109750 A1 WO 2019109750A1 CN 2018111758 W CN2018111758 W CN 2018111758W WO 2019109750 A1 WO2019109750 A1 WO 2019109750A1
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Prior art keywords
signal
electrical
channel
sampling
channels
Prior art date
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Ceased
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PCT/CN2018/111758
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English (en)
French (fr)
Inventor
钟光华
宋刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanchang Black Shark Technology Co Ltd
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Nanchang Black Shark Technology Co Ltd
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Priority claimed from CN201721696554.5U external-priority patent/CN207611366U/zh
Priority claimed from CN201711292251.1A external-priority patent/CN108132728A/zh
Application filed by Nanchang Black Shark Technology Co Ltd filed Critical Nanchang Black Shark Technology Co Ltd
Priority to JP2020531519A priority Critical patent/JP2021506025A/ja
Priority to US16/770,882 priority patent/US20210165547A1/en
Priority to EP18885208.1A priority patent/EP3722930A4/en
Priority to KR1020207016399A priority patent/KR20200096232A/ko
Publication of WO2019109750A1 publication Critical patent/WO2019109750A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger

Definitions

  • the present invention relates to the field of operation identification, and in particular, to an operation recognition device, an identification method, and an intelligent terminal having the same.
  • FIG. 1 it is a schematic diagram of a keyboard array.
  • the keyboard array is composed of R0-R3 as a row channel, and C0-C3 is used as a column channel, and each row channel intersects with all column channels to form 16 electrical nodes.
  • the working steps of the keyboard array are as follows:
  • Input a signal to a certain channel for example, set to high level or low level
  • the detection circuit reads the level state of each column channel in order to see if there is any signal or level received. If the received signal proves that the current row of this row has a button press; if there is no signal or electricity Flat, then the column representing this row has no button press;
  • the scanning principle of the touch screen is similar to that of the keyboard array.
  • the inside of the touch screen is provided with row channels and column channels for sensing touch operations, and is scanned row by row row by column.
  • all the row or column channels are traversed one by one in the order of channel positions in one scanning period.
  • FIG. 2 it is a topology diagram of a scanning array.
  • the left side of FIG. 2 is a column channel, which operates as a driving line and receives an input signal;
  • the right side of FIG. 2 is a row channel, which is detected by a detecting circuit, and each row of scanning channels is A switch is provided, and only one row channel is selected by the switch at the same time for state detection.
  • a disadvantage of the prior art technical solution is that scanning a whole array requires a relatively long process, and it is necessary to traverse each row and each column, and there is a certain delay for the operation of pressing a button or the response of a touch operation, and the user operation cannot be found immediately.
  • an object of the present invention to provide an operation recognition device capable of shortening an operation recognition delay, an operation recognition method based on the operation recognition device, and a smart terminal having the operation recognition device.
  • the invention discloses an operation recognition device, comprising an operation receiving unit, a scanning array composed of at least one driving channel and at least one sampling channel, and at least one signal reading unit, wherein the driving channel and the sampling channel intersect to form at least one An electrical node, the signal reading unit is connected to all sampling channels and acquires electrical signals on all sampling channels, and the operation identifying device further comprises: at least one signal source, the signal source is connected to each driving channel, and simultaneously All driving channels transmit electrical signals, wherein the electrical signals of at least two driving channels are different frequencies; the signal reading unit includes at least one band pass filter for acquiring an electrical signal of each sampling channel; and the operation receiving unit receives one After the user operates, at least one electrical node on the scan array corresponding to the user operation is turned on, and the drive channel corresponding to the turned-on electrical node forms an electrical path with the sampling channel, and the signal reading unit acquires all The electrical signal on the sampling channel is based on the sampling of the acquired electrical signal. And determining the frequency position of the electrical pathways of the electric signal, thereby
  • the number of the signal reading units is equal to the number of the sampling channels, and is arranged one-to-one corresponding to the sampling channels.
  • the signal reading unit is one, and the operation identifying device further includes a set of switching switches, each sampling channel is connected to the signal reading unit through a switch; the signal reading unit passes the The switch acquires the electrical signals of each sampling channel one by one.
  • the frequency spacing of the electrical signals on adjacent drive channels is greater than a frequency threshold.
  • the operation receiving unit is a button; the user operation is a pressing operation; and the signal source simultaneously transmits electrical signals of different frequencies to each driving channel.
  • the operation receiving unit is a touch screen; the user operation is a touch operation; and the signal source simultaneously transmits electrical signals of different frequencies to each driving channel.
  • the operation recognition device further includes: an analog-to-digital converter connected to the signal reading unit to convert the electrical signal into a digital signal including a touch operation area and pixel point information.
  • an analog-to-digital converter connected to the signal reading unit to convert the electrical signal into a digital signal including a touch operation area and pixel point information.
  • An operation recognition method is implemented based on an operation recognition device, comprising: an operation receiving unit, a scan array composed of at least one drive channel and at least one sampling channel, and at least one signal reading unit, the drive channel and The sampling channels intersect to form at least one electrical node, and the signal reading unit is connected to all sampling channels and acquires electrical signals on all sampling channels, wherein the operation identifying method comprises the following steps: S101: the operation The signal source in the identification device simultaneously transmits electrical signals of different frequencies to all driving channels, wherein the electrical signals of at least two driving channels are different frequencies;
  • the signal reading unit acquires an electrical signal of each sampling channel
  • S104 Identify a frequency of an electrical signal of each sampling channel
  • S105 Determine the position of the electrical path according to the sampling channel where the electrical signal acquired in steps S103 and S104 and the frequency of the electrical signal, thereby identifying the location of the user operation.
  • the number of the signal reading units is equal to the number of the sampling channels, and each of the signal reading units includes at least one band pass filter; in step S103, all the signal reading units simultaneously acquire corresponding ones. Sampling the electrical signals of the channels; in step S104, each signal reading unit filters the electrical signals of each sampling channel into at least two frequency ranges and identifies them through the band pass filter.
  • the signal reading unit is one, and the operation identifying device further comprises a set of switching switches, each sampling channel is connected to the signal reading unit through a switching switch; in step S103, the signal reading is performed.
  • the unit acquires the electrical signals of each sampling channel one by one through the switch.
  • the signal reading unit includes at least one band pass filter; in step S104, the signal reading unit filters the electrical signal of each sampling channel into at least two frequencies through the band pass filter. Scope and identification.
  • step S104 the electrical signal of each sampling channel is converted into a spectral parameter by Fourier transform, and the magnitude of the electrical signal corresponding to each frequency in step S101 is identified.
  • the signal source simultaneously transmits electrical signals of different frequencies to each driving channel.
  • the operation identifying means cyclically executes steps S101 to S105 in accordance with a scan cycle.
  • the operation receiving unit is a touch screen; the user operation is a touch operation; the operation recognition device further includes an analog-to-digital converter; the operation recognition method further includes:
  • the analog-to-digital converter converts the electrical signal into a digital signal including a touch operation area and pixel point information.
  • the invention also discloses an intelligent terminal, comprising the above operation recognition device.
  • Suitable for scanning array type input devices especially suitable for touch screen and touchpad applications.
  • FIG. 1 is a schematic diagram of a keyboard array in the prior art
  • FIG. 2 is a topological view of a scanning array in the prior art
  • Figure 3 is a structural view of an operation recognition device in accordance with a preferred embodiment of the present invention.
  • Figure 4 is a structural view of an operation recognition device in accordance with another preferred embodiment of the present invention.
  • FIG. 5 is a schematic flow chart of an operation identification method in accordance with a preferred embodiment of the present invention.
  • FIG. 6 is a flow chart showing an operation recognition method in accordance with another preferred embodiment of the present invention.
  • 10-scan array 101-drive channel, 102-sampling channel, 103-electrical node, 11-operation receiving unit, 12-signal reading unit, 121-bandpass filter, 13-signal source, 14-analog conversion , 15-switch.
  • first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • first information may also be referred to as second information without departing from the scope of the present disclosure.
  • second information may also be referred to as first information.
  • word "if” as used herein may be interpreted as "when” or “when” or “in response to a determination.”
  • the operation identifying apparatus includes:
  • the operation receiving unit 11 is configured to receive a user operation, and may be a device that directly contacts the user, such as a button of a keyboard, a touch layer of a touch screen, a button of a console, and the like, and is a button S1 to a button S16 in FIG. 3 .
  • the number of the operation receiving unit 11 is determined according to the requirements of the operation identifying device application, for example, the function phone is often designed as a keyboard with 9 buttons, and the keyboard of the desktop computer is designed as 101 buttons, and the industrial device is required according to operation.
  • Set the appropriate number of buttons, and the touch screen or touchpad on devices such as smartphones and tablets is a one-piece touch layer.
  • the scan array 10 can be a conductive line in a keyboard array or a conductive layer of a touch screen.
  • the scan array 10 is composed of at least one drive channel 101 and at least one sampling channel 102.
  • the drive channel 101 receives external electrical signals as R0 to R3 in FIG. 3; the sampling channel 102 is as shown in FIG. 3, C0 to C3. Used to detect if there is an electrical signal.
  • the driving channel 101 can be either a row channel or a column channel. When the driving channel 101 is a row channel or a column channel, the sampling channel 102 is correspondingly a column channel or a row channel to implement two channels. Cross.
  • the driving channel 101 and the sampling channel 102 do not have to meet the vertical distribution in the physical sense, and may be set to different geometric shapes such as a polyline or a curve according to actual needs. For example, the size of some buttons on the computer keyboard is inconsistent, correspondingly The distribution of row or column channels is not necessarily a straight line that is perpendicular to each other.
  • the number of the driving channel 101 and the sampling channel 102 depends on the needs of the application. For example, the driving channel 101 of the large touch screen or the touch panel can be more than 20, and the keyboard on the calculator only needs 4-5 driving channels. 101.
  • Each of the drive channels 101 intersects all of the sampling channels 102 to form an electrical node 103 that is in a non-conducting state when the operational identification device does not receive user operations, such as in the drive channel
  • 101 and sampling channel 102 are both four, that is, 4 ⁇ 4 scanning array 10
  • the scanning array 10 is a keyboard array
  • the operation receiving unit 11 is a button, and each button corresponds to an electrical node 103.
  • the two ends are respectively connected to the driving channel 101 and the sampling channel 103 corresponding to the electrical node 103 where they are located.
  • the button is pressed, the corresponding electrical node 103 of the button is turned on.
  • the button S1 is connected to C0 and R3, and corresponds to the electrical node 103 formed by the intersection of C0 and R3.
  • the conductive layer can also be regarded as etching different ITO conductive lines on two ITO coating layers, and the patterns etched on the two ITO coatings are perpendicular to each other.
  • the ITO is an abbreviation of indium tin oxide
  • the operation receiving unit 11 is a touch layer over the conductive layer, such as a composite glass screen, when When the touch layer receives an external touch operation, it causes a change in capacitance or resistance on the conductive layer, thereby enabling detection of user operations.
  • the signal reading unit 12 is connected to all sampling channels 102 and acquires electrical signals on all sampling channels 102.
  • the signal reading unit 12 may be a detection circuit capable of detecting an electrical signal on the sampling channel 102, and determining whether the operation receiving unit 11 corresponding to the electrical node 103 on the sampling channel 102 receives the signal according to the state of the electrical signal. User action.
  • the signal reading unit 12 may be at least one or plural.
  • the signal source 13 is connected to each of the driving channels 101 while transmitting electrical signals to all of the driving channels 101, wherein the electrical signals of at least two of the driving channels 101 are different frequencies.
  • the present invention provides an electrical signal to the driving channel 101 through the signal source 13.
  • the electrical signal on the driving channel 101 is often a digital logic level, and in the present invention.
  • the signal source 13 provides electrical signals having different frequencies to ensure that the electrical signals of the at least two driving channels 101 are different frequencies.
  • the signal source 13 provides an electrical signal of 1 KHz to R0 and 2 KHz to R1.
  • the electrical signal may be a waveform having periodic characteristics such as a sine wave, a sawtooth wave, and a square wave.
  • the signal source 13 may be a signal generator, or may be an electrical signal obtained by dividing a clock circuit of the operation recognition device to obtain different frequencies.
  • the signal source 13 can provide electrical signals of different frequencies for all the driving channels 101, that is, the frequency of the electrical signals of each driving channel 101 is different; or the electrical signals with different frequencies can be provided only for the partial driving channels 101.
  • a digital logic level signal is still provided for the remaining drive channels 101, using a hybrid electrical signal.
  • the signal reading unit 12 includes at least one band pass filter 121 that acquires an electrical signal of each sampling channel 102.
  • the signal reading unit 12 includes at least one band pass filter 121, which is a band-pass filter in English, which is a specific Waves in the band pass through devices that shield other bands at the same time.
  • the RLC oscillator circuit is an analog bandpass filter.
  • the signal source 13 respectively sends electrical signals of 1 KHz and 2 KHz to R0 and R1 in the drive channel 101. If the button S9 or the button S13 is pressed, it is possible for the C0 in the sampling channel 102.
  • the band pass filter 121 allows an electrical signal of 1 KHz to pass, and the signal reading unit 12 is in the The output of the band pass filter 121 is detected. If an electric signal of 1 KHz is detected, it means that the button S13 is pressed; if no electric signal of 1 KHz is detected, the button S13 is not pressed.
  • the band pass range and the number of the band pass filters 121 are determined according to the settings of the scan array 10 and the signal source 13. For example, if four drive channels 101 respectively have electrical signals of different frequencies, at least 4 operations are required.
  • the band pass filter 121 in different frequency bands can satisfy the identification needs, and the band pass filters 121 can be arranged in parallel, and the signal reading unit 12 detects electrical signals from the output ends of the different band pass filters 121, respectively.
  • the operation of the operation identifying device is as follows. After the operation receiving unit 11 receives a user operation, at least one electrical node 103 on the scan array 10 corresponding to the user operation is turned on, and the turned-on electrical The driving channel 101 corresponding to the node 103 and the sampling channel 102 form an electrical path, and the signal reading unit 12 acquires electrical signals on all the sampling channels 102, and judges according to the sampling channel 102 where the obtained electrical signal is located and the frequency of the electrical signal. The location of the electrical pathway, thereby identifying the location at which the user operates.
  • the user operation may be a pressing operation, a touch operation, or the like according to the operation receiving unit 11.
  • the signal source 13 in FIG. 3 simultaneously sends electrical signals of 1KHz, 2KHz, 3KHz, and 4KHz to the driving channel 101, that is, to R0, R1, R2, and R3.
  • the button S11 turns on the connected drive channel 101 and the sampling channel 102, that is, turns on R1 and C2, so that R1 and C2 form an electrical path, and the 2KHz electrical signal from the signal source 13 is described by R1 and C2.
  • the signal reading unit 12 acquires, at least three of the band pass filters 121 in the signal reading unit 12 respectively filter the electrical signals of 1KHz, 2KHz, 3KHz and 4KHz which may exist on C0 to C3, and finally An electrical signal of 2 KHz is detected at C2, so that it can be inferred that it is a combination of R1 and C2, and finally the user is pressed the button S11. Even if the user presses at least two buttons at the same time, such user operations can be recognized because the frequency of the electrical signals of the different drive channels 101 are different, for example, when the user simultaneously presses the button S9 and the button S14, the signal is read.
  • the unit 12 can acquire an electric signal of 2 KHz on C0, and acquire an electric signal of 1 KHz on C1, thereby obtaining two electrical paths of C0 and R1, C1 and R0 simultaneously, thereby recognizing that the user simultaneously presses the button S9 and the button. S14.
  • the working principle is the same as the above principle, and the position of the user operation is also recognized by judging the frequency of the electrical signal on the different sampling channels 102.
  • the signal source 13 when the signal source 13 only transmits electrical signals of different frequencies to the partial driving channel 101, for example, only the frequencyd electrical signals are transmitted to R0 and R1, and the digital logic levels are still transmitted for R2 and R3, Then, the method of time-sharing is also needed. For example, the signal source 13 first sends electrical signals of 1 kHz and 2 kHz to R0 and R1, and then sends high levels to R2 and R3 at different times. Then, the signal reading unit 12 performs electrical signal identification in two ways. When the signal source 13 transmits an electrical signal having a frequency to R0 and R1, the C0 to C3 are scanned and filtered by the band pass filter 121.
  • the number of band pass filters 121 is also consistent with the number of drive channels 101 that receive electrical signals of different frequencies. If the working time of the four driving channels 101 in the prior art is 8 milliseconds in total, that is, one scanning period is 8 milliseconds, an average of 2 milliseconds is required for each driving channel, and this embodiment simultaneously transmits electrical signals to R0 and R1. The compression is 2 milliseconds, and a total of 6 milliseconds is required to complete the electrical signal supply of all the drive channels 101, saving 2 milliseconds compared to the prior art.
  • the above method compresses the time of receiving the electrical signals one by one of the drive channels 101 receiving the electrical signals with frequency, and the time that can be saved compared to the prior art is: the drive channel 101 that receives the electrical signals with frequency
  • the number is N
  • the total number of drive channels 101 is M, which saves time for the scanning cycle in the prior art.
  • the advantage of this embodiment is that the balance of cost and performance is comprehensively considered, the number of channels of the signal source 13 and the number of the band pass filters 121 are not high, and the internal space structure of the operation recognition device is also saved.
  • the signal reading unit 12 is one, and the operation identifying device further includes a set of switching switches 15, each sampling channel 102 passing through a switching switch 15 and the signal reading unit 12
  • the signal reading unit 12 acquires the electrical signals of each sampling channel one by one through the switch 15 .
  • a time sharing manner is still adopted, and only the electrical signals of one sampling channel 102 are sampled at the same time, and the selection of different sampling channels 102 is performed by the switching switch 15, Signal isolation is achieved.
  • the point of this embodiment is to save hardware costs, and only one signal reading unit 12 is needed.
  • the frequency interval of the electrical signals on the adjacent driving channels 101 in the scanning array 10 is greater than a frequency threshold.
  • the frequency of the electrical signals on the adjacent driving channels 101 must be maintained at a sufficient frequency interval, that is, greater than a frequency threshold.
  • the frequency threshold may be determined according to the frequency identification resolution of the signal reading unit 12. For example, when the frequency identification resolution of the signal reading unit 12 is 50 Hz, the electrical signals of 990 Hz and 1010 Hz are indistinguishable. Therefore, the frequency threshold should be set to at least 50 Hz so that the signal reading unit 12 accurately acquires the frequency of the electrical signal.
  • electrical signals having relatively close frequencies may be provided on the driving channels 101 that are far apart.
  • electrical signals of 1 KHz, 2 KHz, 3 KHz, and 1.5 KHz may be respectively provided.
  • R0 and R3 are far apart, and the frequencies closer to each other can be selected.
  • the signal source 13 simultaneously transmits electrical signals of different frequencies to each driving channel 101, that is, all the driving channels 101 receive electrical signals having frequencies, which can simultaneously transmit electrical signals, thereby maximally saving the said The operating time of the drive channel 101.
  • the prior art method is to supply the electrical signals to the drive channel 101 one by one, and the required scan period is the accumulation of the operating time of each drive channel 101.
  • the present invention provides electrical signal supply to all the driving channels 101 at the same time, without separately supplying electrical signals to each driving channel 101, saving a lot of time. If the operation identifying device has N driving channels, the present invention The required scan period is one-ninth of the prior art.
  • the operation recognition device when the operation recognition device is a touch screen, the operation recognition device further includes: an analog-to-digital converter 14 connected to the signal reading unit 12 to convert the electrical signal It is a digital signal containing the area of the touch operation area and pixel point information. Since the touch screen receives the user's touch operation, the contact position is often an area corresponding to a plurality of pixels, so it is necessary to identify the area of the user's touch operation and the pixel point information.
  • the scanning array 10 of the touch screen can be designed as a dense driving channel 101 and a sampling channel 102. Accordingly, the electrical node 103 is also very dense. When there is a touch operation, a plurality of electrical nodes 103 are turned on.
  • the signal reading unit 12 can acquire electrical signals of different frequencies on the plurality of sampling channels 102, and the analog-to-digital converter 14 can perform electrical conversion on the electrical signals of different frequencies to determine the electrical corresponding to the same frequency signal.
  • the range of the path in turn, can determine the area of the corresponding touch operation and pixel point information.
  • the pixel point information is a specific pixel point coordinate position in the area of the touch operation. The invention is applicable to both the touch screen field and other fields, but the application effect in the field of the touch screen is the best.
  • the number of the signal reading units 12 is equal to the number of the sampling channels 102, and the sampling channel 102 one-to-one correspondence.
  • each signal reading unit 12 has at least one band pass filter 121 having the same number of drive channels 101 as receiving electric signals of different frequencies. In this embodiment, all the signal reading units 12 can work in parallel without polling all the sampling channels 102 separately, which saves the sampling time.
  • Embodiments may further compress the scan period to the previous one If the scanning period is T in the prior art, and the number of all driving channels 101 in the operation recognition device according to the present invention is N, and the electrical signals of different frequencies are received, and the number of sampling channels is M, the scanning period in the present invention is
  • FIG. 5 is a schematic flow chart of an operation identification method according to a preferred embodiment of the present invention.
  • the operation identification method is implemented based on an operation recognition device including an operation receiving unit 11 and at least one drive channel 101.
  • a scan array 10 composed of at least one sampling channel 102 and at least one signal reading unit 12, the driving channel 101 and the sampling channel 102 intersect to form at least one electrical node 103, the signal reading unit 12 and all sampling channels 102 Connecting and acquiring electrical signals on all sampling channels 102, the operational identification method includes the following steps:
  • the signal source 13 in the operation recognition device simultaneously transmits electrical signals of different frequencies to all the driving channels 101, wherein the electrical signals of at least two driving channels 101 are different frequencies.
  • the operation identification device includes a signal source 13 that provides electrical signals having different frequencies to ensure that the electrical signals of the at least two drive channels 101 are of different frequencies.
  • the electrical signal may be a waveform having periodic characteristics such as a sine wave, a sawtooth wave, and a square wave.
  • the signal source 13 can provide electrical signals of different frequencies for all the driving channels 101, that is, the frequency of the electrical signals of each driving channel 101 is different; or the electrical signals with different frequencies can be provided only for the partial driving channels 101.
  • a digital logic level signal is still provided for the remaining drive channels 101, using a hybrid electrical signal.
  • the user operation may be a pressing operation, a touch operation, or the like according to the operation receiving unit 11.
  • the operation receiving unit 11 After the operation receiving unit 11 receives a user operation, the operation receiving unit 11 causes a physical change on the scan array 10, and at least one electrical node 103 on the scan array 10 corresponding to the user operation is guided.
  • the drive channel 101 corresponding to the turned-on electrical node 103 forms an electrical path with the sampling channel 102, and the electrical signal propagates within the electrical path and propagates from the drive channel 101 to the sampling channel 102.
  • the signal reading unit 12 acquires an electrical signal of each sampling channel 102.
  • the signal reading unit 12 acquires electrical signals on all sampling channels 102. For each sampling channel 102, a corresponding signal reading unit 12 is disposed for each sampling channel 102, and all signals are read.
  • the taking unit 12 synchronizes the acquisition of the electric signal; and the other is to use a signal reading unit 12 to select the sampling channels 102 one by one for electrical signal acquisition by means of the switching switch 15.
  • the signal reading unit 12 has a detection circuit capable of detecting an analog signal or a digital signal.
  • S104 Identify the frequency of the electrical signal of each sampling channel 102.
  • This step identifies the frequency of the electrical signal on each of the sampling channels 102 detected in step S103. For example, for C0 to C3 in FIG. 3, the frequencies of the electrical signals on the four sampling channels 102 are respectively identified.
  • the identification of the frequency can be realized by the sampling principle, that is, the detection of the electrical signal is realized by a higher sampling frequency, and then the detection result is “spliced together” to form a complete waveform, wherein the sampling frequency is at least the frequency of the electrical signal. 2 times, for example, when the electrical signal on the sampling channel 102 is 2 kHz, the sampling frequency is at least 4 kHz.
  • the higher the sampling frequency the higher the accuracy, and the more the degree of reduction of the electrical signal is similar.
  • different frequencies may be separated in the time domain or the frequency domain by hardware or software.
  • S105 Determine the position of the electrical path according to the sampling channel 103 where the electrical signal acquired in steps S103 and S104 and the frequency of the electrical signal, thereby identifying the position of the user operation.
  • the signal reading unit 12 performs electrical signal acquisition by using the switch 15 , it can only correspond to one sampling channel 102 at the same time, so the sampling channel 102 is determinable, and the sampling channel 102 is determined according to the timing of detecting one by one. The number can be. If the signal reading unit 12 is selected in a one-to-one correspondence with the sampling channel 102, the signal reading unit 12 can be numbered, and which signal reading unit 12 detects the electrical signal, which is the sampling channel. 103 has an electrical signal. If an electrical signal of a corresponding frequency is detected from a certain sampling channel 102, it means that the sampling channel 102 that detects the electrical signal constitutes an electrical path, and the frequency range of the electrical signal is also determined, and the electrical signal of the driving channel 101 is determined.
  • the frequency of the electrical channel 103 corresponding to the electrical path of the electrical signal is locked, and the position of the electrical path is obtained, and the electrical node 103 corresponding to each electrical path is unique.
  • the location corresponding to the electrical node 103 is the location operated by the user.
  • the content of the step S103 is different according to the number setting of the signal reading unit 12.
  • the signal reading unit 12 is disposed in one-to-one correspondence with the sampling channels 102, and each of the signal reading units 12 includes At least one band pass filter 121; in the step S103, all the signal reading units 12 simultaneously acquire electrical signals of the corresponding sampling channels.
  • each signal reading unit filters the electrical signals of each sampling channel into at least two frequency ranges by the band pass filter and recognizes them.
  • the band-pass filter 121 is used to filter the electrical signals on the same sampling channel 102 into electrical signals in a plurality of frequency bands, for example, a band-pass filter 121 in parallel form, and the output of each band-pass filter 121 is output.
  • a band-pass filter 121 in parallel form
  • separation processing of electrical signals of different frequencies on the same sampling channel 102 is realized. Since the operation of each signal reading unit 12 does not interfere with each other, the electrical signal detection of the sampling channel 102 can be performed at the same time, and it is not necessary to detect each sampling channel 102 one by one, which greatly improves the recognition speed.
  • the operation identifying device includes a set of switching switches 15, each sampling channel 102 is connected to the signal reading unit 12 through a switch 15; in step S103, the The signal reading unit 12 acquires the electrical signals of each sampling channel 102 one by one through the switching switch 15.
  • the signal reading unit 12 includes at least one bandpass filter 121 therein.
  • the signal reading unit 12 filters the electrical signals of each sampling channel 102 into at least two frequency ranges by the band pass filter 121 and recognizes them.
  • the identification problem of different frequency electrical signals on the same sampling channel 102 is still solved by hardware.
  • each sampling is performed by Fourier transform.
  • the electrical signal of the channel 102 is converted into a spectral parameter, and the magnitude of the electrical signal corresponding to each frequency in step S101 is identified.
  • the Fourier transform is an integral transform derived from the Fourier integral representation of the function, and the periodic function can be developed into a Fourier series under certain conditions. In the field of communication, the Fourier transform plays an important role in converting a complex signal into a superposition of a plurality of sine waves of different frequencies and amplitudes, thereby obtaining a spectrum of the signal, which includes signal amplitudes at different frequencies.
  • the signal reading unit 12 corresponds to a case where a user presses a plurality of buttons simultaneously or multi-touch for a touch screen.
  • the detected electrical signal is a composite electrical signal containing different frequencies, and the composite electrical signal is converted into a spectral parameter by Fourier transform, and the frequency corresponding to the different frequencies in the spectral parameter can be analyzed to know the corresponding frequency.
  • the electrical signal is received. For example, when the user presses two buttons at the same time, two electrical signals are respectively sent to a sampling channel 102, which are 1 kHz and 2 kHz respectively.
  • the signal source 13 simultaneously sends electrical signals of different frequencies to each driving channel 101, that is, all the driving channels 101 receive electrical signals with frequencies, and can simultaneously transmit electrical signals.
  • the working time of the drive channel 101 is maximally saved.
  • the prior art method is to supply the electrical signals to the drive channel 101 one by one, and the required scan period is the accumulation of the operating time of each drive channel 101.
  • the present invention provides electrical signal supply to all the driving channels 101 at the same time, without separately supplying electrical signals to each driving channel 101, saving a lot of time. If the operation identifying device has N driving channels, the present invention The required scan period is one-ninth of the prior art.
  • the operation recognition means cyclically executes steps S101 to S105 in accordance with a scan cycle.
  • the operation identifying device is persistent in the recognition of the user operation, so the steps S101 to S105 are cyclically executed, and the driving signals of the different frequencies are continuously supplied to the driving channel 101, and the signal reading unit 12 is passed through the signal reading unit 12.
  • the electrical signal is acquired and frequency identified to identify the location at which the user operates.
  • the operation receiving unit 11 is a touch screen; the user operation is a touch operation; the operation recognition device further includes an analog-to-digital converter 14; the operation recognition method further includes:
  • the analog to digital converter 14 converts the electrical signal into a digital signal including a touch operation area and pixel point information.
  • the operation recognition device When the operation recognition device is a touch screen, the operation recognition device further includes: an analog-to-digital converter 14 connected to the signal reading unit 12, converting the electrical signal to include a touch operation area area and a pixel point Digital signal of information. Since the touch screen receives the user's touch operation, the contact position is often an area corresponding to a plurality of pixels, so it is necessary to identify the area of the user's touch operation and the pixel point information.
  • the scanning array 10 of the touch screen can be designed as a dense driving channel 101 and a sampling channel 102. Accordingly, the electrical node 103 is also very dense. When there is a touch operation, a plurality of electrical nodes 103 are turned on.
  • the signal reading unit 12 can acquire electrical signals of different frequencies on the plurality of sampling channels 102, and the analog-to-digital converter 14 can perform electrical conversion on the electrical signals of different frequencies to determine the electrical corresponding to the same frequency signal.
  • the range of the path in turn, can determine the area of the corresponding touch operation and pixel point information.
  • the pixel point information is a specific pixel point coordinate position in the area of the touch operation.
  • the invention is applicable to both the touch screen field and other fields, but the application effect in the field of the touch screen is the best.
  • the invention also discloses an intelligent terminal, comprising the above operation recognition device.
  • the smart terminal may be a device having a human-computer interaction function, such as a smart phone or a tablet computer, and the user operation is received by the operation recognition device.

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Abstract

一种操作识别装置、操作识别方法及具有该装置的智能终端，所述操作识别装置包括操作接收单元（11）、由至少一个驱动通道（101）和至少一个采样通道（102）组成的扫描阵列（10）及至少一个信号读取单元（12），所述驱动通道（101）与所述采样通道（102）交叉组成至少一个电气节点（103），所述信号读取单元（12）与所有采样通道（102）连接并获取所有采样通道（102）上的电信号，至少一个信号源（13），所述信号源（13）与每一驱动通道（101）连接，同时向所有驱动通道（101）发送电信号，其中至少两个驱动通道（101）的电信号为不同频率；所述信号读取单元（12）包括至少一个带通滤波器（121），获取每一采样通道（102）的电信号。本方法有效减少操作识别的延时，提升操作识别效率；适用于扫描阵列类型的输入设备，尤其适合于触摸屏及触摸板领域的应用。

Description

[根据细则26改正21.12.2018]　一种操作识别装置、操作识别方法及具有该装置的智能终端 技术领域
本发明涉及操作识别领域，尤其涉及一种操作识别装置、识别方法及具有该装置的智能终端。
技术背景
无论是在工业生产、商业应用还是生活中，大部分电子产品均具有人机交互功能，通过输入设备接收用户的输入操作，常见的输入设备有键盘、触摸屏等，此类输入设备具有共同的特点是以阵列扫描的方式工作。
参阅图1，为一键盘阵列原理图，所述键盘阵列由R0-R3作为行通道，由C0-C3作为列通道，每一行通道都与所有列通道交汇，构成了16个电气节点，并设有16个按键，每一按键连接对应电气节点上的行通道和列通道。所述键盘阵列的工作步骤如下：
1.给某一行通道输入信号，例如设为高电平或低电平；
2.检测电路按照顺序读取每一列通道的电平状态，看有没有收到信号或者电平，如果收到的信号，证明当前的这一行这一列是有按键按下；如果没有信号或者电平，那么代表这一行这一列没有按键按下；
3.按照顺序逐一扫描每一行，每一列，直到所有的行和列都遍历完成，代表着一个扫描周期完成；
4.如此周而复始扫描，不断检测按键按下的操作。
触摸屏的扫描原理与所述键盘阵列类似，所述触摸屏的内部设有感应触摸操作的行通道和列通道，并逐行逐列进行扫描。上述各种阵列进行扫描时，在一个扫描周期内，往往会按照通道位置顺序将所有的行通道或列通道遍历一遍。
参阅图2，为一扫描阵列的拓扑图，图2中左侧为列通道，作为驱动线路工作，接收输入信号；图2中右侧为行通道，被检测电路检测，每一行扫描通道上均设有一开关，通过开关在同一时刻仅选择一个行通道进行状态检测。
现有技术的技术方案的缺点为扫描整个阵列需要一个相对比较长的过程，需要去遍历每一行每一列，对于按下按键的操作或者触摸操作的反应都有一定的延迟，无法立即找到用户操作的位置，如果遇到最坏的情况，当用户操作时，操作对应的位置刚好错过某一行或者某一列的扫描，那么需要下一个周期才能发现用户触摸的事件，延迟的时间将更长。对于响应时间要求非常高的应用场景，例如玩游戏，这些延迟将会降低使用体验。
因此，如何减少识别用户操作的时间，提升操作识别的效率，是一个需要解决的技术问题。
发明概要
为了克服现有技术缺陷，本发明的目的在于提供一种能够缩短操作识别延迟的操作识别装置、基于所述操作识别装置的操作识别方法以及具有该操作识别装置的智能终端。
本发明公开了一种操作识别装置，包括操作接收单元、由至少一个驱动通道和至少一个采样通道组成的扫描阵列及至少一个信号读取单元，所述驱动通道与所述采样通道交叉组成至少一个电气节点，所述信号读取单元与所有采样通道连接并获取所有采样通道上的电信号，所述操作识别装置还包括：至少一个信号源，所述信号源与每一驱动通道连接，同时向所有驱动通道发送电信号，其中至少两个驱动通道的电信号为不同频率；所述信号读取单元包括至少一个带通滤波器，获取每一采样通道的电信号；所述操作接收单元接收一用户操作后，所述扫描阵列上与所述用户操作对应位置的至少一个电气节点被导通，被导通的电气节点对应的驱动通道与采样通道构成电气通路，所述信号读取单元获取所有采样通道上的电信号，根据获取的电信号所在的采样通道及所述电信号的频率判断所述电气通路的位置，从而识别所述用户操作的位置。
优选地，所述信号读取单元的数量与所述采样通道的数量相等，与所述采样通道一一对应布设。
优选地，所述信号读取单元为一个，所述操作识别装置还包括一组切换开关，每一采样通道通过一切换开关与所述信号读取单元连接；所述信号读取单元通过所述切换开关逐一获取每一采样通道的电信号。
优选地，相邻驱动通道上的电信号的频率间隔大于一频率阈值。
优选地，所述操作接收单元为按键；所述用户操作为按压操作；所述信号源同时向每一驱动通道发送不同频率的电信号。
优选地，所述操作接收单元为触摸屏；所述用户操作为触摸操作；所述信号源同时向每一驱动通道发送不同频率的电信号。
优选地，所述操作识别装置还包括：模数转换器，与所述信号读取单元连接，将所述电信号转换为包含了触摸操作区域面积和像素点信息的数字信号。
一种操作识别方法，基于一操作识别装置实现，所述操作识别装置包括操作接收单元、由至少一个驱动通道和至少一个采样通道组成的扫描阵列及至少一个信号读取单元，所述驱动通道与所述采样通道交叉组成至少一个电气节点，所述信号读取单元与所有采样通道连接并获取所有采样通道上的电信号，其特征在于，所述操作识别方法包括以下步骤：S101：所述操作识别装置内的信号源同时向所有驱动通道发送不同频率的电信号，其中至少两个驱动通道的电信号为不同频率；
S102：当所述操作接收单元接收一用户操作时，所述扫描阵列上与所述用户操作对应位置的电气节点被导通，被导通的电气节点对应的驱动通道与采样通道构成电气通路；
S103：所述信号读取单元获取每一采样通道的电信号；
S104：识别每一采样通道的电信号的频率；
S105：根据步骤S103及步骤S104中获取的电信号所在的采样通道及所述电信号的频率判断所述电气通路的位置，从而识别所述用户操作的位置。
优选地，所述信号读取单元的数量与所述采样通道的数量相等，每一所述信号读取单元内包括至少一个带通滤波器；步骤S103中，所有信号读取单元同时获取对应的采样通道的电信号；步骤S104中，每一信号读取单元通过所述带通滤波器将每一采样通道的电信号滤除为至少两个频率范围并识别。
优选地，所述信号读取单元为一个，所述操作识别装置还包括一组切换开关，每一采样通道通过一切换开关与所述信号读取单元连接；步骤S103中，所述信号读取单元通过所述切换开关逐一获取每一采样通道的电信号。
优选地，所述信号读取单元内包括至少一个带通滤波器；步骤S104中，所述信号读取单元通过所述带通滤波器将每一采样通道的电信号滤除为至少两个频率范围并识别。
优选地，步骤S104中，通过傅里叶变换将每一采样通道的电信号转换为频谱参数，识别步骤S101中各频率对应的电信号幅值大小。
优选地，步骤S101中，所述信号源同时向每一驱动通道发送不同频率的电信号。
优选地，所述操作识别装置按照一扫描周期循环执行步骤S101至步骤S105。
优选地，所述操作接收单元为触摸屏；所述用户操作为触摸操作；所述操作识别装置还包括模数转换器；所述操作识别方法还包括：
S106：所述模数转换器将所述电信号转换为包含了触摸操作区域面积和像素点信息的数字信号。
本发明还公开了一种智能终端，包括上述的操作识别装置。
采用了上述技术方案后，与现有技术相比，具有以下有益效果：
1.有效减少操作识别的延时，提升操作识别效率；
2.适用于扫描阵列类型的输入设备，尤其适合于触摸屏和触摸板领域的应用。
附图说明
图1为现有技术中键盘阵列的原理图；
图2为现有技术中扫描阵列的拓扑图；
图3为符合本发明一优选实施例中操作识别装置的结构图；
图4为符合本发明另一优选实施例中操作识别装置的结构图；
图5为符合本发明一优选实施例中操作识别方法的流程示意图；
图6为符合本发明另一优选实施例中操作识别方法的流程示意图。
附图标记：
10-扫描阵列、101-驱动通道、102-采样通道、103-电气节点、11-操作接收单元、12-信号读取单元、121-带通滤波器、13-信号源、14-模数转换器、15-切换开关。
发明内容
以下结合附图与具体实施例进一步阐述本发明的优点。
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
在本公开使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本公开。在本公开和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本公开可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本公开范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”可以被解释成为“在……时”或“当……时”或“响应于确定”。
在本发明的描述中，需要理解的是，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，除非另有规定和限定，需要说明的是，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是机械连接或电连接，也可以是两个元件内部的连通，可以是直接相连，也可以通过中间媒介间接相连，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。
在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了有利于本发明的说明，其本身并没有特定的意义。因此，“模块”与“部件”可以混合地使用。
参阅图3，为符合本发明一优选实施例中操作识别装置的结构图，所述操作识别装置包括：
-操作接收单元11
所述操作接收单元11用于接收用户操作，可以是键盘的按键、触摸屏的触摸层、操作台的按钮等直接与用户接触的设备，在图3中为按键S1至按键S16。当所述操作接收单元11的数量根据所述操作识别装置应用场合的需求而定，例如功能手机常设计为具有9个按键的键盘，台式计算机的键盘设计为101个按键，工业设备根据操作需求设置相应数量的按钮，智能手机、平板电脑等设备上的触摸屏或触摸板则为一整块的触摸层。
-扫描阵列10
所述扫描阵列10可以是键盘阵列中的导电线路，也可以是触摸屏的导电层。所述扫描阵列10由至少一个驱动通道101和至少一个采样通道102组成，所述驱动通道101如图3中的R0至R3，接收外部电信号；所述采样通道102如图3中C0至C3，用于被检 测是否有电信号。所述驱动通道101既可以是行通道，也可以是列通道，当所述驱动通道101为行通道或列通道时，所述采样通道102则相应为列通道或行通道，以实现两种通道的交叉。所述驱动通道101和采样通道102并不一定要满足物理意义上的垂直分布，可根据实际需要布设为折线、曲线等不同的几何形状，例如计算机键盘上有些按键的大小是不一致的，相应的行通道或列通道的分布就不一定是相互垂直的直线。所述驱动通道101和采样通道102的数量根据应用场合的需求而定，例如大的触摸屏或触摸板的驱动通道101可达20根以上，而计算器上的键盘只需要4-5根驱动通道101。
每一所述驱动通道101都与所有的采样通道102交叉，组成电气节点103，所述电气节点103在所述操作识别装置未接收用户操作时处于不导通的状态，例如在所述驱动通道101和采样通道102均为4根的时候，也就是4×4的扫描阵列10，共有16个电气节点103。所述操作接收单元11与所述扫描阵列10之间存在物理连接，例如当所述扫描阵列10为键盘阵列时，所述操作接收单元11为按键，每一按键对应一电气节点103，按键的两端分别连接其所在的电气节点103对应的驱动通道101和采样通道103，当按键被按下时，该按键对应的电气节点103被导通。图3中，按键S1连接了C0和R3，对应了C0和R3交叉形成的电气节点103。再例如当所述扫描阵列10为触摸屏的导电层时，所述导电层也可以看作由两层ITO涂层上蚀刻出不同的ITO导电线路，两个ITO涂层上蚀刻的图形相互垂直，其一为水平方向，另一为竖直方向，所述ITO为铟锡氧化物的缩写；所述操作接收单元11为覆盖于所述导电层上方的触摸层，如复合玻璃屏，当所述触摸层接收外部触摸操作时，会引起所述导电层上电容或电阻的变化，从而实现对用户操作的检测。
-信号读取单元12
所述信号读取单元12与所有采样通道102连接并获取所有采样通道102上的电信号。所述信号读取单元12可以是检测电路，能够检测所述采样通道102上的电信号，根据所述电信号的状态判断所述采样通道102上的电气节点103对应的操作接收单元11是否接收用户操作。所述信号读取单元12至少为一个，也可以有多个。
-信号源13
所述信号源13与每一驱动通道101连接，同时向所有驱动通道101发送电信号，其中至少两个驱动通道101的电信号为不同频率。与现有技术不同的是，本发明通过所述信号源13为所述驱动通道101提供电信号，现有技术中所述驱动通道101上的电信号往往为数字逻辑电平，而本发明中所述信号源13提供具有不同频率的电信号，保证至少两个驱动通道101的电信号为不同频率，例如在图3中，所述信号源13向R0提供1KHz的电信号，向R1提供2KHz的电信号。所述电信号可以是正弦波、锯齿波、方波等具有周期特性的波形。所述信号源13可以是信号发生器，也可以是由所述操作识别装置中时钟电路进行分频得到不同频率的电信号。所述信号源13可以为所有的驱动通道101提供不同频率的电信号，也就是每一驱动通道101的电信号的频率各不相同；也可以仅为部分驱动通道101提供频率不同的电信号，为其余的驱动通道101仍提供数字逻辑电平信号，采用混合式的电信号。
本发明中，所述信号读取单元12包括至少一个带通滤波器121，获取每一采样通道102的电信号。为了对所述信号源13发出的不同频率的电信号进行识别，所述信号读取单元12包括至少一个带通滤波器121，所述带通滤波器英文为band-pass filter，是一个允许特定频段的波通过同时屏蔽其他频段的设备，比如RLC振荡回路就是一个模拟带通滤波器。仍以图3为例，所述信号源13分别向驱动通道101中的R0、R1发送了1KHz和2KHz的电信号，若按键S9或按键S13被按下，对于采样通道102中的C0，可能会接收到1KHz或2KHz的电信号，需要通过所述带通滤波器121进行滤除并识别，例如所述带通滤波器121允许1KHz的电信号通过，则所述信号读取单元12在所述带通滤波器121的输出端进行检测，若检测到1KHz的电信号，则意味着按键S13被按下；若没有检测到1KHz的电信号，则按键S13未被按下。所述带通滤波器121的带通范围和数量根据所述扫描阵列10及信号源13的设置而定，例如若有4根驱动通道101分别具有不同频率的电信号，则至少需要4个工作于不同频段的带通滤波器121才能满足识别需要，所述带通滤波器121可以是并联设置，所述信号读取单元12分别从不同带通滤波器121的输出端检测电信号。
所述操作识别装置的工作原理如下，所述操作接收单元11接收一用户操作后，所述扫描阵列10上与所述用户操作对应位置的至少一个电气节点103被导通，被导通的电气节点103对应的驱动通道101与采样通道102构成电气通路，所述信号读取单元12获取所有采样通道102上的电信号，根据获取的电信号所在的采样通道102及所述电信号的频率判断所述电气通路的位置，从而识别所述用户操作的位置。所述用户操作根据所述操作接收单元11的不同，可以是按压操作、触摸操作等。
具体地，图3中所述信号源13同时向所述驱动通道101，即向R0、R1、R2及R3发送1KHz、2KHz、3KHz及4KHz的电信号，当用户按下按键S11时，所述按键S11接通其连接的驱动通道101及采样通道102，即接通R1及C2，这样R1和C2构成了一条电气通路，所述信号源13发出的2KHz的电信号通过R1和C2被所述信号读取单元12获取，所述信号读取单元12中的至少三个所述带通滤波器121分别对C0至C3上可能存在的1KHz、2KHz、3KHz及4KHz的电信号进行滤通，最后在C2检测到2KHz的电信号，从而可推断出是R1和C2的组合，最终识别出用户按下了按键S11。即便用户同时按下了至少两个按键，由于不同驱动通道101的电信号的频率不同，也能将这样的用户操作识别出来，例如用户同时按下按键S9和按键S14，则所述信号读取单元12能够在C0上获取2KHz的电信号，在C1上获取1KHz的电信号，从而得到C0与R1、C1与R0两种电气通路同时存在，进而可以识别出用户同时按下了按键S9和按键S14。对于触摸屏构造的操作识别装置，其工作原理与上述原理相同，也是通过判断不同采样通道102上的电信号的频率来识别用户操作的位置。
在某些实施例中，所述信号源13仅向部分驱动通道101发送不同频率的电信号时，例如仅向R0和R1发送有频率的电信号，对于R2及R3仍发送数字逻辑电平，则还需采用分时发送的方式，比如所述信号源13先同时向R0和R1发送1KHz和2KHz的电信号，再于不同时刻分别向R2和R3发送高电平。则所述信号读取单元12采用两种方式进行 电信号识别，在所述信号源13向R0和R1发送有频率的电信号时，对C0至C3进行扫描并通过带通滤波器121进行滤波识别；在所述信号源13向R2和R3分别发送逻辑电平时，分别获取C0至C3上的逻辑电平信号。相应地，带通滤波器121的数量也与接收不同频率电信号的驱动通道101的数量保持一致。若现有技术中对于4个驱动通道101的工作时间总共为8毫秒，即一个扫描周期为8毫秒，平均每个驱动通道需要2毫秒的时间，而本实施例对R0和R1同时发送电信号，压缩了2毫秒，共需要6毫秒完成所有驱动通道101的电信号供给，相对于现有技术节省了2毫秒。对于广泛的应用情况，上述方式压缩了接收有频率的电信号的驱动通道101的逐一接收电信号的时间，相对于现有技术能够节省的时间为：接收有频率的电信号的驱动通道101的数量为N，驱动通道101总数为M，则节省时间为现有技术中扫描周期的
Figure PCTCN2018111758-appb-000001
本实施例的优点是综合考虑了成本与性能的平衡，对信号源13的通道数量和带通滤波器121的数量要求不高，还节约了所述操作识别装置的内部空间结构。
图3所示实施例中，所述信号读取单元12为一个，所述操作识别装置还包括一组切换开关15，每一采样通道通102过一切换开关15与所述信号读取单元12连接；所述信号读取单元12通过所述切换开关15逐一获取每一采样通道的电信号。本实施例中，对于采样通道102的检测，仍采用了分时的方式，在同一时间仅对一个采样通道102的电信号进行采样，并通过所述切换开关15进行不同采样通道102的选择，实现信号隔离。本实施例的有点是节约硬件成本，只需一个信号读取单元12即可。
作为所述操作识别装置的进一步改进，所述扫描阵列10中相邻驱动通道101上的电信号的频率间隔大于一频率阈值。为了减少相邻驱动通道101之间的干扰，提升电信号的识别率，相邻的驱动通道101上的电信号的频率须保持足够的频率间隔，即大于一频率阈值。所述频率阈值可根据所述信号读取单元12的频率识别分辨率而定，例如所述信号读取单元12的频率识别分辨率为50Hz时，对于990Hz和1010Hz的电信号，是无法区分的，因此所述频率阈值应设为至少50Hz，以便所述信号读取单元12准确获取所述电信号的频率。此外，为了有效利用频率资源，可以在相距较远的驱动通道101上提供频率较为接近的电信号，例如对于图3中的R0至R3，可分别提供1KHz、2KHz、3KHz、1.5KHz的电信号，R0和R3的距离较远，可选择较为接近的频率。
进一步地，所述信号源13同时向每一驱动通道101发送不同频率的电信号，也就是所有的驱动通道101均接收有频率的电信号，可实现同时发送电信号，最大程度地节约所述驱动通道101的工作时间。现有技术中的方法是逐一向驱动通道101进行电信号的供给，所需的扫描周期为每一驱动通道101的工作时间的累加。而本发明是在同一时间对所有驱动通道101进行电信号供给，无需分别对每一驱动通道101进行电信号供给，节省了大量的时间，若操作识别装置具有N个驱动通道，则本发明中所需的扫描周期为现有技术的N分之一。
作为所述操作识别装置的进一步改进，当所述操作识别装置为触摸屏时，所述操作识别装置还包括：模数转换器14，与所述信号读取单元12连接，将所述电信号转换为包 含了触摸操作区域面积和像素点信息的数字信号。由于触摸屏接收用户的触摸操作时，接触的位置往往是一片区域，对应了多个像素点，因此需要将用户的触摸操作的区域面积和像素点信息识别出来。所述触摸屏的扫描阵列10可设计为较为密集的驱动通道101与采样通道102，相应地，所述电气节点103也会非常密集，当有触摸操作时，会有多个电气节点103导通，所述信号读取单元12能够在多个采样通道102上获取到不同频率的电信号，所述模数转换器14将上述不同频率的电信号经过模数转换后可判断同一频率信号对应的电气通路的范围，进而可以确定对应的触摸操作的区域面积和像素点信息。所述像素点信息即所述触摸操作的区域中具体的像素点坐标位置。本发明既适用于触摸屏领域，也适用于其他领域，但是在触摸屏领域的应用效果最佳。
参阅图4，为符合本发明另一优选实施例中操作识别装置的结构图，本实施例中，所述信号读取单元12的数量与所述采样通道102的数量相等，与所述采样通道102一一对应布设。同样地，每一信号读取单元12内均具有至少一个带通滤波器121，所述带通滤波器121的数量与接收不同频率的电信号的驱动通道101的数量相等。本实施例中，所有的信号读取单元12可并行工作，无需分别对所有的采样通道102进行轮询采样，节约了采样时间，若所述操作识别装置中具有X个采样通道102，则本实施例可进一步将扫描周期压缩为之前的
Figure PCTCN2018111758-appb-000002
若现有技术中扫描周期为T，符合本发明的操作识别装置中所有驱动通道101数量为N，均接收不同频率的电信号，采样通道数量为M，则本发明中的扫描周期为
Figure PCTCN2018111758-appb-000003
参阅图5，为符合本发明一优选实施例中操作识别方法的流程示意图，所述操作识别方法基于一操作识别装置实现，所述操作识别装置包括操作接收单元11、由至少一个驱动通道101和至少一个采样通道102组成的扫描阵列10及至少一个信号读取单元12，所述驱动通道101与所述采样通道102交叉组成至少一个电气节点103，所述信号读取单元12与所有采样通道102连接并获取所有采样通道102上的电信号，所述操作识别方法包括以下步骤：
S101：所述操作识别装置内的信号源13同时向所有驱动通道101发送不同频率的电信号，其中至少两个驱动通道101的电信号为不同频率。
所述操作识别装置内包括一信号源13，所述信号源13提供具有不同频率的电信号，保证至少两个驱动通道101的电信号为不同频率。所述电信号可以是正弦波、锯齿波、方波等具有周期特性的波形。所述信号源13可以为所有的驱动通道101提供不同频率的电信号，也就是每一驱动通道101的电信号的频率各不相同；也可以仅为部分驱动通道101提供频率不同的电信号，为其余的驱动通道101仍提供数字逻辑电平信号，采用混合式的电信号。
S102：当所述操作接收单元11接收一用户操作时，所述扫描阵列10上与所述用户操作对应位置的电气节点103被导通，被导通的电气节点103对应的驱动通道101与采 样通道102构成电气通路。
所述用户操作根据所述操作接收单元11的不同，可以是按压操作、触摸操作等。所述操作接收单元11接收一用户操作后，所述操作接收单元11引起所述扫描阵列10上的物理变化，所述扫描阵列10上与所述用户操作对应位置的至少一个电气节点103被导通，被导通的电气节点103对应的驱动通道101与采样通道102构成电气通路，所述电信号在所述电气通路内传播，从所述驱动通道101传播至所述采样通道102。
S103：所述信号读取单元12获取每一采样通道102的电信号。
所述信号读取单元12获取所有采样通道102上的电信号，对于每一采样通道102的采样方式，一种是对每一采样通道102布设一个对应的信号读取单元12，所有的信号读取单元12同步进行电信号的获取；还有一种是采用一个信号读取单元12，采用切换开关15的方式逐一选择各采样通道102进行电信号获取。所述信号读取单元12内具有检测电路，能够检测模拟信号或者数字信号。
S104：识别每一采样通道102的电信号的频率。
本步骤对步骤S103中检测到的每一采样通道102上的电信号的频率进行识别，例如对于图3中的C0至C3，分别识别这四个采样通道102上的电信号的频率。对于频率的识别可通过采样原理实现，即通过较高的采样频率实现对所述电信号的检测，再将检测结果“拼凑”起来形成完整的波形，其中采样频率至少为所述电信号的频率的2倍，例如所述采样通道102上的电信号为2kHz时，采样频率至少为4kHz，采样频率越高，精度就越高，对于电信号的还原程度也就越近似。对于同一采样通道102上的电信号可能具有多个频率时，可采用硬件或软件方式将不同的频率进行时域或频域进行分离处理。
S105：根据步骤S103及步骤S104中获取的电信号所在的采样通道103及所述电信号的频率判断所述电气通路的位置，从而识别所述用户操作的位置。
若所述信号读取单元12采用切换开关15的方式进行电信号获取，在同一时刻只能对应一个采样通道102，因此采样通道102是可确定的，根据其逐一检测的时序来确定采样通道102的编号即可。若选用所述信号读取单元12与所述采样通道102一一对应的方式，则对所述信号读取单元12编号即可，哪个信号读取单元12检测到了电信号，即为哪个采样通道103有电信号。若从某个采样通道102检测到相应频率的电信号，则意味着检测到该电信号的采样通道102构成了电气通路，且该电信号的频率范围也确定了，而驱动通道101的电信号的频率是确定的，因此可以锁定检测到电信号的电气通路对应的驱动通道101及检测通道102，获取到所述电气通路的位置，每一电气通路对应的电气节点103是唯一的，所述电气节点103对应的位置即为所述用户操作的位置。
在本发明的某些实施方式中，根据所述信号读取单元12的数量设置，所述步骤S103的内容有所区别。当所述信号读取单元12的数量与所述采样通道102的数量相等时，所述信号读取单元12与所述采样通道102一一对应布设，每一所述信号读取单元12内包括至少一个带通滤波器121；所述步骤S103中，所有的信号读取单元12同时获取对应的采样通道的电信号。步骤S104中，每一信号读取单元通过所述带通滤波器将每一采样通道的电信号滤除为至少两个频率范围并识别。本实施例采用带通滤波器121将同一采 样通道102上的电信号滤除为多个频带上的电信号，例如采用并联形式的带通滤波器121，每一带通滤波器121的输出端输出对应频带的电信号，实现了对同一采样通道102上不同频率的电信号的分离处理。由于每一信号读取单元12的工作互不干涉，因此可同时进行采样通道102的电信号检测，不必逐一对每一采样通道102进行检测，大大提升了识别速度。
当所述信号读取单元12为一个时，所述操作识别装置包括一组切换开关15，每一采样通道102通过一切换开关15与所述信号读取单元12连接；步骤S103中，所述信号读取单元12通过所述切换开关15逐一获取每一采样通道102的电信号。
为了实现当所述信号读取单元12为一个时对同一采样通道102上不同电信号的频率的识别，所述信号读取单元12内包括至少一个带通滤波器121。步骤S104中，所述信号读取单元12通过所述带通滤波器121将每一采样通道102的电信号滤除为至少两个频率范围并识别。本实施例仍采用硬件方式解决同一采样通道102上不同频率电信号的识别问题。
在本发明其他实施例中，为了实现当所述信号读取单元12为一个时对同一采样通道102上不同电信号的频率的识别，所述步骤S104中，通过傅里叶变换将每一采样通道102的电信号转换为频谱参数，识别步骤S101中各频率对应的电信号幅值大小。所述傅里叶变换一种积分变换，它来源于函数的傅里叶积分表示，周期函数在一定条件下可以展成傅里叶级数。在通信领域，傅里叶变换具有举足轻重的作用，可将复杂的信号转换为多个不同频率和幅度正弦波的叠加，从而得到信号的频谱，所述频谱上包括了不同频率下的信号幅度，也就是频谱参数。对于本发明而言，同一采样通道102上可能有两个或两个以上的不同频率的电信号，对应用户同时按下多个按键或者对于触摸屏多点触摸的情况，所述信号读取单元12检测到的电信号是包含了不同频率的复合电信号，通过傅里叶变换，将该复合电信号转换为频谱参数，通过分析频谱参数中不同频率对应的幅值即可得知该频率对应的电信号是否被接收。例如用户同时按下两个按键，分别向某个采样通道102上发送了两路电信号，分别为1kHz和2kHz，通过傅里叶变换得到频谱参数后，可以发现在1kHz和2kHz对应的位置具有较高的幅度，其他频率对应的位置幅度为零或其他预设的参考电压值，这样就实现了对同一采样通道102上不同频率电信号的识别。
进一步地，所述步骤S101中，所述信号源13同时向每一驱动通道101发送不同频率的电信号，也就是所有的驱动通道101均接收有频率的电信号，可实现同时发送电信号，最大程度地节约所述驱动通道101的工作时间。现有技术中的方法是逐一向驱动通道101进行电信号的供给，所需的扫描周期为每一驱动通道101的工作时间的累加。而本发明是在同一时间对所有驱动通道101进行电信号供给，无需分别对每一驱动通道101进行电信号供给，节省了大量的时间，若操作识别装置具有N个驱动通道，则本发明中所需的扫描周期为现有技术的N分之一。
作为所述操作识别方法的进一步改进，所述操作识别装置按照一扫描周期循环执行步骤S101至步骤S105。所述操作识别装置对用户操作的识别时持续性的，故循环执行所述步骤S101至步骤S105，不断地向所述驱动通道101提供不同频率的电信号，并通 过所述信号读取单元12获取所述电信号并进行频率识别，从而识别所述用户操作的位置。
作为所述操作识别方法的进一步改进，所述操作接收单元11为触摸屏；所述用户操作为触摸操作；所述操作识别装置还包括模数转换器14；所述操作识别方法还包括：
S106：所述模数转换器14将所述电信号转换为包含了触摸操作区域面积和像素点信息的数字信号。
当所述操作识别装置为触摸屏时，所述操作识别装置还包括：模数转换器14，与所述信号读取单元12连接，将所述电信号转换为包含了触摸操作区域面积和像素点信息的数字信号。由于触摸屏接收用户的触摸操作时，接触的位置往往是一片区域，对应了多个像素点，因此需要将用户的触摸操作的区域面积和像素点信息识别出来。所述触摸屏的扫描阵列10可设计为较为密集的驱动通道101与采样通道102，相应地，所述电气节点103也会非常密集，当有触摸操作时，会有多个电气节点103导通，所述信号读取单元12能够在多个采样通道102上获取到不同频率的电信号，所述模数转换器14将上述不同频率的电信号经过模数转换后可判断同一频率信号对应的电气通路的范围，进而可以确定对应的触摸操作的区域面积和像素点信息。所述像素点信息即所述触摸操作的区域中具体的像素点坐标位置。
本发明既适用于触摸屏领域，也适用于其他领域，但是在触摸屏领域的应用效果最佳。
本发明还公开了一种智能终端，包括上述的操作识别装置。所述智能终端可以是智能手机、平板电脑等具有人机交互功能的设备，通过所述操作识别装置接收用户操作。
应当注意的是，本发明的实施例有较佳的实施性，且并非对本发明作任何形式的限制，任何熟悉该领域的技术人员可能利用上述揭示的技术内容变更或修饰为等同的有效实施例，但凡未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何修改或等同变化及修饰，均仍属于本发明技术方案的范围内。

Claims (16)

  1. 一种操作识别装置，包括操作接收单元、由至少一个驱动通道和至少一个采样通道组成的扫描阵列及至少一个信号读取单元，所述驱动通道与所述采样通道交叉组成至少一个电气节点，所述信号读取单元与所有采样通道连接并获取所有采样通道上的电信号，其特征在于，
    所述操作识别装置还包括：
    至少一个信号源，所述信号源与每一驱动通道连接，同时向所有驱动通道发送电信号，其中至少两个驱动通道的电信号为不同频率；
    所述信号读取单元包括至少一个带通滤波器，获取每一采样通道的电信号；
    所述操作接收单元接收一用户操作后，所述扫描阵列上与所述用户操作对应位置的至少一个电气节点被导通，被导通的电气节点对应的驱动通道与采样通道构成电气通路，所述信号读取单元获取所有采样通道上的电信号，根据获取的电信号所在的采样通道及所述电信号的频率判断所述电气通路的位置，从而识别所述用户操作的位置。
  2. 如权利要求1所述的操作识别装置，其特征在于，
    所述信号读取单元的数量与所述采样通道的数量相等，与所述采样通道一一对应布设。
  3. 如权利要求1所述的操作识别装置，其特征在于，
    所述信号读取单元为一个，所述操作识别装置还包括一组切换开关，每一采样通道通过一切换开关与所述信号读取单元连接；
    所述信号读取单元通过所述切换开关逐一获取每一采样通道的电信号。
  4. 如权利要求1-3任一项所述的操作识别装置，其特征在于，
    相邻驱动通道上的电信号的频率间隔大于一频率阈值。
  5. 如权利要求1-3任一项所述的操作识别装置，其特征在于，
    所述操作接收单元为按键；
    所述用户操作为按压操作；
    所述信号源同时向每一驱动通道发送不同频率的电信号。
  6. 如权利要求1-3任一项所述的操作识别装置，其特征在于，
    所述操作接收单元为触摸屏；
    所述用户操作为触摸操作；
    所述信号源同时向每一驱动通道发送不同频率的电信号。
  7. 如权利要求6所述的操作识别装置，其特征在于，
    所述操作识别装置还包括：
    模数转换器，与所述信号读取单元连接，将所述电信号转换为包含了触摸操作区域面积和像素点信息的数字信号。
  8. 一种操作识别方法，基于一操作识别装置[由于装置独权中包含了带通滤波器，方法独权中并未使用，故此处不采用引用写法，而是再次阐述操作识别装置的前序部分技术特征；信号源可作为两个独权的特定技术特征以获取单一性。]实现，所述操作识别装置包括操作接收单元、由至少一个驱动通道和至少一个采样通道组成的扫描阵列及至少一个 信号读取单元，所述驱动通道与所述采样通道交叉组成至少一个电气节点，所述信号读取单元与所有采样通道连接并获取所有采样通道上的电信号，其特征在于，所述操作识别方法包括以下步骤：
    S101：所述操作识别装置内的信号源同时向所有驱动通道发送不同频率的电信号，其中至少两个驱动通道的电信号为不同频率；
    S102：当所述操作接收单元接收一用户操作时，所述扫描阵列上与所述用户操作对应位置的电气节点被导通，被导通的电气节点对应的驱动通道与采样通道构成电气通路；
    S103：所述信号读取单元获取每一采样通道的电信号；
    S104：识别每一采样通道的电信号的频率；
    S105：根据步骤S103及步骤S104中获取的电信号所在的采样通道及所述电信号的频率判断所述电气通路的位置，从而识别所述用户操作的位置。
  9. 如权利要求8所述的操作识别方法，其特征在于，
    所述信号读取单元的数量与所述采样通道的数量相等，与所述采样通道一一对应布设；
    每一所述信号读取单元内包括至少一个带通滤波器；
    步骤S103中，所有信号读取单元同时获取对应的采样通道的电信号；
    步骤S104中，每一信号读取单元通过所述带通滤波器将每一采样通道的电信号滤除为至少两个频率范围并识别。
  10. 如权利要求8所述的操作识别方法，其特征在于，
    所述信号读取单元为一个，所述操作识别装置还包括一组切换开关，每一采样通道通过一切换开关与所述信号读取单元连接；
    步骤S103中，所述信号读取单元通过所述切换开关逐一获取每一采样通道的电信号。
  11. 如权利要求10所述的操作识别方法，其特征在于，
    所述信号读取单元内包括至少一个带通滤波器；
    步骤S104中，所述信号读取单元通过所述带通滤波器将每一采样通道的电信号滤除为至少两个频率范围并识别。
  12. 如权利要求10所述的操作识别方法，其特征在于，
    步骤S104中，通过傅里叶变换[使用傅里叶变换时，由于软件不能并行操作，须保证同一频率仅对应一个电气通路，故与切换开关结合作为一个方案，因此引用了权10]将每一采样通道的电信号转换为频谱参数，识别步骤S101中各频率对应的电信号幅值大小。
  13. 如权利要求8-12任一项所述的操作识别方法，其特征在于，
    步骤S101中，所述信号源同时向每一驱动通道发送不同频率的电信号。
  14. 如权利要求8-12任一项所述的操作识别方法，其特征在于，
    所述操作识别装置按照一扫描周期循环执行步骤S101至步骤S105。
  15. 如权利要求8-12任一项所述的操作识别方法，其特征在于，
    所述操作接收单元为触摸屏；
    所述用户操作为触摸操作；
    所述操作识别装置还包括模数转换器；
    所述操作识别方法还包括：
    S106：所述模数转换器将所述电信号转换为包含了触摸操作区域面积和像素点信息的数字信号。
  16. 一种智能终端，包括如权利要求1所述的操作识别装置。
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