CN109060077A - A kind of equipment and Wiper system using bath of glass height in sound detection water tank - Google Patents
A kind of equipment and Wiper system using bath of glass height in sound detection water tank Download PDFInfo
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- CN109060077A CN109060077A CN201810936032.0A CN201810936032A CN109060077A CN 109060077 A CN109060077 A CN 109060077A CN 201810936032 A CN201810936032 A CN 201810936032A CN 109060077 A CN109060077 A CN 109060077A
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- 239000011521 glass Substances 0.000 title claims abstract description 357
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 23
- 230000005236 sound signal Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 37
- 239000007921 spray Substances 0.000 claims description 13
- 238000013528 artificial neural network Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 6
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- 239000013589 supplement Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 13
- 241001269238 Data Species 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 230000004048 modification Effects 0.000 description 3
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- 206010039203 Road traffic accident Diseases 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
- B60S1/48—Liquid supply therefor
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- Acoustics & Sound (AREA)
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- General Physics & Mathematics (AREA)
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- Mechanical Engineering (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The embodiment of the present application discloses a kind of equipment and Wiper system using bath of glass height in sound detection water tank, applied to glass water tank, wherein, detection device includes microphone module and controller, controller is used to send motor open signal to motor, microphone module is used to obtain the voice signal of bath of glass when motor is opened, and voice signal is sent to controller, the frequency that spectrum analysis obtains voice signal is carried out to voice signal by controller, the height of the corresponding bath of glass of frequency of present sound signals is obtained according to frequency-height function, to realize the height using bath of glass in sound detection water tank, so that driver can be with timely learning bath of glass height, before bath of glass is finished, supplement bath of glass.
Description
Technical field
The present invention relates to water tank monitoring technical field more particularly to a kind of utilize bath of glass height in sound detection water tank
Equipment and Wiper system.
Background technique
Bath of glass is mainly used for when windshield transparency is bad on automobile, can be by spraying bath of glass, and passes through rain
After brush scrub, the clearly visual field is provided for driver.Especially in driving at night, the dust on windshield can scatter light
Line influences driver and is judged in time according to road ahead situation, in turn result in the hair of accident if cannot clean in time
It is raw, reduce drive safety.
However, the water tank due to bath of glass is limited, driver needs when bath of glass will be finished, and glass is replenished in time
Water avoids being finished due to bath of glass, and cannot clean the dust of windshield in time, leads to traffic accident.
Therefore, it is necessary to the height to bath of glass in water tank to detect, and when bath of glass being prevented to be finished, not mended in time
It fills and influences driving experience.
Summary of the invention
In order to solve the above technical problem existing in the prior art, the embodiment of the present invention, which provides, a kind of utilizes sound detection
The equipment and Wiper system of bath of glass height in water tank can promptly and accurately detect the height of bath of glass, and then use in bath of glass
It before complete, reminds driver that bath of glass is replenished in time, improves driving experience.
To solve the above problems, the embodiment of the present application first aspect provides and a kind of utilizes bath of glass in sound detection water tank
The equipment of height is applied to glass water tank, which includes: microphone module and controller；
The glass water tank, for accommodating bath of glass；
The glass water tank connecting windscreen wiper；
The glass water tank further includes motor, and the motor is used to drive the bath of glass in the glass water tank from institute
State rain brush ejection；
The controller, for sending motor open signal to the motor；
The microphone module, for obtaining the voice signal of bath of glass when the motor is opened；
The controller, for carrying out the frequency that spectrum analysis obtains the voice signal to the voice signal, by frequency
Rate-height function obtains the height of the corresponding bath of glass of frequency of the voice signal；Frequency-the height function first passes through in advance
Test obtains.
Optionally, the equipment further include: current detection circuit；
The current detection circuit, for obtaining the operating current of the motor；
The controller, the corresponding bath of glass of operating current for being also used to obtain the motor by electric current-height function
Highly；Electric current-the height function first passes through test in advance and obtains；When judge the height of the corresponding bath of glass of the frequency with it is described
When the difference of the height of the corresponding bath of glass of operating current is not within the scope of the first preset height, electrical fault is judged.
Optionally, the controller is also used to obtain the sum of described motor working time；By when m- height function obtain
The height of motor work at present time corresponding bath of glass；M- height function first passes through test in advance and obtains when described；
The controller is also used to judge the corresponding bath of glass height of frequency glass corresponding with the working time
When the difference of glass water height is greater than the second preset height range, judge that rain brush pipeline blocks；
When the difference for judging the corresponding bath of glass height of the operating current and the working time corresponding bath of glass height
When less than third preset height range, judge that the glass water tank leaks.
Optionally, the controller to the voice signal carry out spectrum analysis obtain the voice signal frequency it
Before, be also used to from the voice signal screen be located at the controller to the motor send the motor open signal moment to
The motor sends the fragment of sound signal between the motor shutdown signal moment.
Optional, the microphone module is also used to be obtained ahead of time the background noise signal when motor is not turned on, and
The background noise signal is sent to the controller；
The controller is also used before carrying out spectrum analysis to the voice signal and obtaining the frequency of the voice signal
In subtracting the background noise signal from the voice signal.
Optionally, the background noise signal when motor is not turned on is obtained ahead of time in the microphone module, specifically:
The microphone module repeatedly obtains the background noise signal when motor is not turned in advance, and will repeatedly obtain
It obtains background noise signal and is sent to the controller；
The background noise signal repeatedly obtained will be averaged as final background noise signal by the controller；
The controller subtracts the background noise signal from the voice signal, specifically:
The controller subtracts the final background noise signal from the voice signal.
Optionally, the frequency-height function first passes through test in advance and obtains, specifically:
The test data of voice signal corresponding frequency and bath of glass height is repeatedly obtained in advance；
It is carried out curve fitting according to the test data, obtains the frequency-height function.
Optionally, the controller, when judging that the glass water tank leaks, according to presently described bath of glass water
Bath of glass height and the height that bath of glass declines by leakage in the glass water tank in the unit time, predict bath of glass in case
The required time is leaked, to have leaked required time alarm driver according to the bath of glass.
Optionally, the controller is that unique ID is arranged in the motor, and the controller is that unique ID is arranged in the rain brush；
The controller sends the motor open signal to the motor by the ID of the motor, and the controller is logical
The ID for crossing the rain brush sends rain brush open signal to the rain brush；When the motor is opened by the glass water-driven described in
Rain brush sprays.
Optionally, the controller is located at automobile or is located at remote server.
Optionally, the equipment further includes remote server；
The controller is also used to the voice signal being sent to the remote server；
The remote server obtains voice signal for carrying out spectrum analysis to the voice signal by neural network
Frequency, by the height for the corresponding bath of glass of frequency that frequency-height function obtains the voice signal.
The embodiment of the present application second aspect provides a kind of Wiper system, including sound is utilized described in first aspect
The equipment for detecting bath of glass height in water tank, further includes: glass water tank, motor and rain brush.
Compared with prior art, the present invention has at least the following advantages:
Equipment and Wiper system provided by the invention using bath of glass height in sound detection water tank is applied to bath of glass
Water tank, wherein detection device includes microphone module and controller, and controller is used to send motor open signal, wheat to motor
Gram wind module is used to obtain the voice signal of bath of glass when motor is opened, and voice signal is sent to controller, by controlling
Device carries out the frequency that spectrum analysis obtains voice signal to voice signal, obtains present sound signals according to frequency-height function
The corresponding bath of glass of frequency height, to realize the height using bath of glass in sound detection water tank, so that driving
Member can supplement bath of glass with timely learning bath of glass height, before bath of glass is finished.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of equipment structure chart using bath of glass height in sound detection water tank provided in an embodiment of the present invention；
Fig. 2A is another device structure using bath of glass height in sound detection water tank provided in an embodiment of the present invention
Figure；
Fig. 2 B is a kind of microphone module installation site structure top view provided in an embodiment of the present invention；
Fig. 3 is a kind of Wiper system structure chart provided in an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
The technical solution provided to facilitate the understanding of the present invention below first carries out the background technique of technical solution of the present invention
Simple declaration.
Inventor has found that the method more commonly used currently used for bath of glass height in detection glass water tank has two under study for action
Kind, first method is the front cover that driver opens vehicle, with a chopsticks or other things that can be measured, is inserted into bath of glass
Water tank, flooding part is current glass water residual altitude.However, using this method measure bath of glass height when, it is necessary to by with
Vehicles hood is opened at family, can just be measured to obtain by other objects, be influenced usage experience.
Second method is using float measurement, and the measurement operability is poor, and float is easy to damage, when float occurs
When problem, causes measurement result inaccurate, influence driving experience.
In addition, bath of glass belongs to the easily-consumed products in automobile use, when bath of glass will be finished, needs to feed in time, keep away
Exempt from because bath of glass is finished to lead to that windshield cannot be cleaned in time, influences driving experience.
Inventor is the study found that when bath of glass in motor driven glass water tank is sprayed from rain brush, glass water tank
In bath of glass sound is generated because of vibration, when the bath of glass height difference in glass water tank, bath of glass vibration frequency
Difference, and then the sound generated is also different, bath of glass height is bigger, and the corresponding frequency of voice signal generated is bigger, the two
It is proportional, therefore, the height of the corresponding bath of glass of present sound signals can be obtained according to the voice signal of bath of glass.
Based on this, the embodiment of the invention provides a kind of equipment using bath of glass height in sound detection water tank, controls
Device sends open signal to motor, so that the bath of glass in motor driven glass water tank is sprayed from rain brush, microphone module
The voice signal of bath of glass is obtained, and the voice signal is sent to controller, frequency spectrum point is carried out to voice signal by controller
Analysis obtains the frequency of voice signal, and according to the height for the corresponding bath of glass of frequency that frequency-height function obtains the voice signal
Degree, so that driver can supplement bath of glass, and be not necessarily to timely learning bath of glass height, before bath of glass is finished
Driver does it yourself to measure the height of bath of glass, improves the user experience.
Embodiment one
Below in conjunction with attached drawing to bath of glass height in the utilization sound detection water tank shown in exemplary embodiment of the present
Equipment describe in detail.
Referring to Fig. 1, which is provided in an embodiment of the present invention a kind of set using bath of glass height in sound detection water tank
Standby structure chart.
Equipment application provided in this embodiment is in glass water tank 103, and the glass water tank is for accommodating bath of glass；Institute
State glass water tank connecting windscreen wiper 104.
The glass water tank 103 further includes motor 105, and the motor 105 is used to drive the glass in glass water tank 103
Glass water is sprayed from rain brush 104.
Equipment provided in this embodiment includes controller 101 and microphone module 102.
The controller 101, for sending motor open signal to the motor 105.
The microphone module 102, for obtaining the voice signal of bath of glass when the motor 105 is opened, and should
Voice signal sends controller 101.
Controller 101, for carrying out the frequency that spectrum analysis obtains voice signal to voice signal, by frequency-height letter
Number obtains the height of the corresponding bath of glass of frequency of voice signal；Frequency-the height function first passes through test in advance and obtains.
Wherein, controller 101 can be the entire car controller of automobile, or the controller being independently arranged.
Microphone module 102 can be set on glass water tank, when the bath of glass in motor driven glass water tank from
When rain brush sprays, start the voice signal for obtaining bath of glass in glass water tank, until motor stops driving, and will be when above-mentioned
Between the voice signal of bath of glass that obtains in section be sent to controller.
In the present embodiment, the height of bath of glass is the function of the corresponding frequency of voice signal, the frequency-in glass water tank
Height function is to first pass through test of many times acquisition in advance.When the corresponding frequency of voice signal that controller analyzes current glass water
When, the height of corresponding bath of glass can be obtained by above-mentioned function.
In some embodiments, the frequency-height function first passes through test in advance and obtains, specifically: it repeatedly obtains in advance
Obtain the test data of the voice signal corresponding frequency and bath of glass height；It is carried out curve fitting according to the test data,
Obtain the frequency-height function.
Wherein, curve matching, which refers to, is approximatively portrayed with full curve or than coordinate represented by discrete point group on quasi-plane
Between functional relation a kind of data processing method.
The bath of glass height of the glass water tank of factory frequency corresponding with voice signal is repeatedly tested in advance, is obtained
Multiple discrete test datas are obtained, and are carried out curve fitting using multiple discrete test datas, to obtain between frequency and height
Functional relation.For example, the discrete test data being obtained ahead of time be (f0, h0), (f1, h1), (f2, h2), (f3, h3), according to
Discrete test data draws scatter plot, and according to the characteristic distributions of scatterplot, selects close, suitable curve type, then
Select corresponding function as the function of frequency and height according to the curve type of fitting.
In some embodiments, controller can be located at automobile, can also be located at remote server.When controller is located at
When automobile, controller carries out the frequency that spectrum analysis obtains voice signal to voice signal, and is obtained according to frequency-height function
The operation of corresponding bath of glass height is in local progress.
When controller is located at remote server, received voice signal is sent to remote server by controller, by remote
Voice signal carries out the frequency that spectrum analysis obtains voice signal to journey server based on the received, and according to frequency-height function
Obtain corresponding bath of glass height.
It is understood that since existing vehicle communication is communicated by the SIM card installed on vehicle,
Since logistic car often travels in countryside, network signal is poor, to guarantee that controller is sent to the voice signal of remote server
It can accurately be received by remote server, it is generally the case that when logistic car is parked in garage, controller believes the sound received
Number it is sent to remote server, voice signal carries out the operation such as spectrum analysis based on the received by remote server.
It should be noted that the communication mode of vehicle and remote server can be WIFI, bluetooth etc., the present embodiment is herein
Without limiting.
In practical applications, spectrum analysis can also be carried out using voice signal of the neural network to acquisition, specifically, control
Device processed is also used to voice signal being sent to remote server；Remote server, for by neural network to voice signal into
Line frequency spectrum analysis obtains the frequency of voice signal, obtains the corresponding bath of glass of frequency of voice signal by frequency-height function
Highly.
In specific implementation, the voice signal of bath of glass when can repeatedly obtain the work of glass water tank in advance, using more
A voice signal training neural network, the neural network after being trained, since the neural network after training has obtained bath of glass
The corresponding bath of glass height of voice signal that water tank generates when working, therefore, the neural network after training can be according to input sound
Sound signal analyzes the frequency of the voice signal, and according to frequency and height function, it is high to obtain bath of glass in current glass water tank
Degree.
In some embodiments, the controller is carrying out the spectrum analysis acquisition sound letter to the voice signal
Number frequency before, be also used to, from the voice signal screening be located at the controller to the motor send motor open
The signal moment sends the fragment of sound signal between the motor shutdown signal moment to giving the motor.
Since motor open signal and motor shutdown signal are sent by controller, controller can save transmission
At the time of motor open signal and at the time of sending motor shutdown signal, and filter out from the received voice signal of institute above-mentioned
Fragment of sound signal between two moment, so that controller, which carries out spectrum analysis to fragment of sound signal, obtains sound piece
The corresponding frequency of break signal, then the height by the corresponding bath of glass of frequency that frequency-height function obtains the fragment of sound signal.
It is understood that other zero can be acquired unavoidably when obtaining the voice signal of bath of glass using microphone module
Part reasons for its use voice signal, in order to guarantee controller when carrying out voice signal judgement, the voice signal judged is glass
The voice signal of glass water improves the accuracy of subsequent judgement, and the present embodiment carries out before controller carries out voice signal judgement
Except making an uproar, the voice signal that microphone module acquires is filtered.
In some embodiments, microphone module is also used to be obtained ahead of time the background sound when motor is not turned on
Signal, and the background noise signal is sent to controller；The controller is obtained to voice signal progress spectrum analysis
Before the frequency for obtaining the voice signal, it is also used to subtract the background noise signal from the voice signal.
Wherein, the voice signal that background noise signal can generate for other components of vehicle, naturally it is also possible to be other
The voice signal that object generates.
In the present embodiment, background noise signal can be obtained ahead of time, and be stored in controller, sound is believed in controller
Before number carrying out spectrum analysis, the voice signal that microphone module is sent is subtracted into the background noise signal prestored, guarantees control
The voice signal of device analysis is the voice signal of bath of glass, influence of the background noise signal to analysis result is avoided, to improve
Detect the accuracy of bath of glass height.
In order to guarantee to remove background noise signal, in some embodiments, the microphone module as much as possible
The background noise signal when motor is not turned on is obtained ahead of time, specifically: microphone module repeatedly obtains the electricity in advance
Background noise signal when machine is not turned on, and the background noise signal repeatedly obtained is sent to controller；Controller will be more
The background noise signal of secondary acquisition is averaged as final background noise signal；The controller subtracts from the voice signal
The background noise signal is removed, specifically: the controller subtracts the final background noise signal from the voice signal.
In the present embodiment, final background noise signal can be stored in controller, voice signal is carried out in controller
Before spectrum analysis, final background noise signal is subtracted from voice signal and obtains final voice signal, so that controller is to most
Whole voice signal carries out the frequency that spectrum analysis obtains final voice signal, and then obtains bath of glass according to frequency-height function
Height improve the accuracy for obtaining bath of glass height by removing background noise signal.
The method of specific removal background noise signal can be according to the feature of background noise signal, using different filtering sides
Method is eliminated.For example, background noise signal is rendered as high-frequency characteristic, low-pass filtering method can be used, by background sound message
Number filtering；Characteristics of low-frequency is presented in background noise signal, can use high-pass filtering method, background noise signal is filtered.Certainly,
It can also be removed, the present embodiment does not limit herein according to other attributes of background noise signal.
The components loaded on vehicle are more, and controller may need to control many components work simultaneously, in order to guarantee
The rain brush that the motor open signal or motor shutdown signal that controller is sent can accurately be received by motor and controller is sent
Open signal or budget shutdown signal can be received by rain brush pregroup, and the present embodiment is motor, ID is respectively set in rain brush, to control
Device processed sends signal to motor or rain brush using ID.
In some embodiments, the controller is that unique ID is arranged in the motor, and the controller is the rain brush
Unique ID is set；The controller sends the motor open signal, the control to the motor by the ID of the motor
Device sends rain brush open signal to the rain brush by the ID of the rain brush；The motor arrives the glass water-driven when opening
The rain brush sprays.
In the present embodiment, the ID of the ID of motor and rain brush can be saved into controller in advance, when controller need to
When motor, rain brush send signal respectively, the ID of the motor and ID of rain brush is obtained, motor is sent to motor by the ID of motor and is opened
Open signal or motor shutdown signal；Rain brush open signal or rain brush shutdown signal are sent to rain brush by the ID of rain brush, improves work
Make efficiency.
The equipment using bath of glass height in sound detection water tank provided through this embodiment, when controller is sent out to motor
Power transmission machine open signal, so that the bath of glass in motor driven glass water tank is sprayed from rain brush, microphone module is in motor
When unlatching, the voice signal of bath of glass in glass water tank is obtained, and the voice signal is sent to controller, so that controller
The frequency that spectrum analysis obtains the voice signal is carried out to the voice signal, which is obtained by frequency-height function
The corresponding bath of glass height of frequency, so that driver can before bath of glass is finished with timely learning bath of glass height
Bath of glass is replenished in time, in addition, doing it yourself to measure the height of bath of glass without driver, improve the user experience.
Embodiment two
Above-described embodiment describes the equipment composition and function using bath of glass height in sound detection water tank, below will knot
Attached drawing is closed to describe to the realization of above equipment concrete function in detail.
Referring to fig. 2, which is that another kind provided in an embodiment of the present invention utilizes bath of glass height in sound detection water tank
Equipment structure chart.
Equipment application provided in this embodiment is in glass water tank 103, wherein 103 connecting windscreen wiper 104 of glass water tank,
Including motor 105.
Equipment provided in this embodiment includes: controller 101, microphone module 102 and current detection circuit 106.
Wherein, the quantity and installation site of microphone module can be set according to actual needs, Mike shown in Fig. 2A
Wind module mounting location is not only as an example, be defined specific location.If only installing a microphone module on automobile,
Central frame beam part can be installed in；If installing four microphone modules, four microphone modules can be installed
In four apex angles of vehicle frame, voice signal is obtained will pass through four microphone modules.
The installation site of microphone module in order to better understand, B, the figure are provided in an embodiment of the present invention referring to fig. 2
A kind of microphone module installation site structure top view, in fig. 2b, including four microphone modules: microphone module 1021,
Microphone module 1022, microphone module 1023, microphone module 1024 are separately mounted on four apex angles of vehicle frame, control
Device 101 is mounted on the middle section of vehicle frame, and four microphone modules can work at the same time, and the voice signal of acquisition is sent to control
Device 101 processed, controller 101 can distinguish the voice signal that four different microphone modules are sent according to reception delay.
Current detection circuit 106, for obtaining the operating current of motor 105.
Controller 101, the height for the corresponding bath of glass of operating current for being also used to obtain the motor by electric current-height function
Degree；Electric current-the height function first passes through test in advance and obtains；When the height and the work for judging the corresponding bath of glass of the frequency
When making the difference of the height of the corresponding bath of glass of electric current and being more than the first preset height range, electrical fault is judged.
Wherein, the height of bath of glass is the function of motor working current, when bath of glass is deeper in glass water tank, motor
Needing biggish operating current just can guarantee that bath of glass is sprayed from rain brush；When bath of glass is shallower, the lesser work of motor
Electric current can be so that bath of glass be sprayed from rain brush, and required electric current is also different when motor works when bath of glass height difference, also
It is to say that the height of bath of glass and electric current are one-to-one.
Electric current-height function is to first pass through test of many times acquisition in advance, and save in the controller, when controller obtains motor
When bath of glass being driven to spray from rain brush when used electric current, current glass water tank can be obtained according to electric current-height function
The height of middle bath of glass.
In some embodiments, the electric current-height function first passes through test in advance and obtains, specifically: it repeatedly obtains in advance
Obtain the operating current of the electrode and the test data of bath of glass height；It is carried out curve fitting, is obtained according to the experimental data
Frequency-the height function.
The operating current of the bath of glass height to the glass water tank of factory and motor is repeatedly tested in advance, is obtained more
A discrete test data, and carried out curve fitting using multiple discrete test datas, to obtain the letter between frequency and height
Number relationship.For example, the discrete test data being obtained ahead of time is (I0, h0), (I1, h1), (I2, h2), (I3, h3), according to discrete
Test data draw scatter plot, and according to the characteristic distributions of scatterplot, select close, suitable curve type, then basis
The curve type of fitting selects corresponding function as the function of electric current and height.
Wherein, the first preset height range can be the difference in height being stored in advance in the controller, which indicates
Under motor normal operating conditions, the height of the bath of glass obtained according to electric current-height function is obtained with according to frequency-height function
Bath of glass height, height difference between the two.
In specific application, when the bath of glass height obtained according to electric current and the bath of glass height difference according to frequency acquisition
Within the scope of the first preset height, i.e., in the error range of permission when, show that motor is working properly, while could also indicate that benefit
With bath of glass pin-point accuracy in voice signal detection water tank.
If difference is not in the first preset height range, due to working as one timing of height of bath of glass in glass water tank,
It is known, fixed for generating the corresponding frequency of voice signal, is not under normal circumstances difference between bath of glass height and frequency
Therefore mistake when height difference is not in the first preset height range, it is poor to show that the corresponding bath of glass height of operating current occurs
Mistake then shows that operating current goes wrong, and then may determine that motor goes out since operating current and bath of glass height correspond
Existing failure.
It for electrical fault, present embodiments provides when judging electrical fault, warning reminding is carried out to driver, so that
Driver is obtained in time to overhaul motor.Specifically, when controller judges electrical fault, control warning piece alarm.
Wherein, warning piece can be buzzer, light emitting diode or voice broadcasting system etc..
In some embodiments, the controller is also used to obtain the sum of described motor working time；By when m- height
Degree function obtains the height of the motor work at present time corresponding bath of glass；M- height function first passes through examination in advance when described
Test acquisition.
Wherein, the height of bath of glass is the function of motor discrete working time, can be obtained by motor total working duration
The height of remaining bath of glass in glass water tank.For example, be for the first time t0 using the operating time that motor driven bath of glass sprays,
The t0 corresponds to bath of glass height h0；Second is t using the operating time that motor driven bath of glass sprays, then t1=t0+t is corresponding
Bath of glass height h1；If third time is still t using the operating time that motor driven bath of glass sprays, t2=t1+t corresponds to glass
Glass water height h2 successively adds up the motor working time, to obtain corresponding bath of glass height.
For when m- height function acquisition, present embodiments provide two ways, two ways carried out separately below
It introduces.
First way, m- height function first passes through test in advance and obtains when described, specifically: described in repeatedly obtaining in advance
The test data of motor working time and bath of glass height；It is carried out curve fitting according to the test data, it is m- when obtaining described
Height function.
The working time of the bath of glass height to the glass water tank of factory and motor is repeatedly tested in advance, is obtained more
A discrete test data, and carried out curve fitting using multiple discrete test datas, to obtain the letter between frequency and height
Number relationship.For example, the discrete test data being obtained ahead of time is (t0, h0), (t1, h1), (t2, h2), (t3, h3), according to discrete
Test data draw scatter plot, and according to the characteristic distributions of scatterplot, select close, suitable curve type, then basis
The curve type of fitting selects function of the corresponding function as time and height.
The second way, according to the capacity for spraying bath of glass in the sum of described electrode working time and rain brush unit time
Obtain the total capacity that the rain brush sprays bath of glass；As described in the floor space of the glass water tank and total capacity acquisition
The total height of rain brush ejection bath of glass；As described in bath of glass elemental height in the glass water tank and total height acquisition
When m- height function.
Bath of glass water tank shape is certain on vehicle, and the volume V for accommodating bath of glass is also certain, according to the bottom surface of glass water tank
Product S, can obtain the elemental height h0=V/S of bath of glass in glass water tank.For example, the rain brush unit time sprays bath of glass
Capacity is c, then can obtain the total capacity C=c*t for spraying bath of glass according to motor operating time t, then spray the height of bath of glass
Spend h1=C/S=c*t/S；It is remaining bath of glass in glass water tank by the bath of glass height h1 that elemental height h0 subtracts ejection
Height h=V/S-c*t/S, to obtain the function of bath of glass height and time.
In some embodiments, the controller is also used to judge the corresponding bath of glass height of the frequency and institute
When stating the difference of working time corresponding bath of glass height greater than the second preset height range, judge that rain brush pipeline blocks.
Wherein, the second preset height range refers under rain brush pipeline normal operating conditions, by utilization frequency-height
The height for the glass stone that m- height function obtains when the height and utilization of the bath of glass that function obtains makes the difference, and obtains between the two
Height difference.
When concrete application, when the bath of glass height obtained according to frequency exists with the bath of glass height difference obtained according to the time
Second preset height range, i.e., in the error range of permission when, show that rain brush pipeline work is normal.
When the bath of glass height that controller is obtained according to frequency is greater than with the bath of glass difference in height obtained according to the working time
When the second preset height range, illustrate that rain brush pipeline blocks, the reason is that, when rain brush pipeline blocks, motor work
The height that bath of glass is sprayed in time is reduced, it is, in motor work same time, when rain brush pipeline works normally, rain brush
The height for spraying bath of glass is greater than the height of rain brush pipeline ejection bath of glass when blocking, therefore, if still according to when m- height
It spends function and calculates bath of glass height in glass water tank, computed altitude value is less than the height of bath of glass in actual glass water tank
Degree.Due to one timing of height when bath of glass in glass water tank, it is known, fixed for generating the corresponding frequency of voice signal
, it is not under normal circumstances mistake between bath of glass height and frequency, i.e., according to the height in actual glass water tank
The height that frequency-height function obtains, therefore, when the corresponding bath of glass height of frequency bath of glass height corresponding with the working time
Difference be greater than the second preset height range when, illustrate that rain brush pipeline blocks.
In some embodiments, the controller is also used to, when judging the corresponding bath of glass height of the operating current
And when the difference of working time corresponding bath of glass height is less than third preset height range, judge the glass water tank hair
Raw leakage.
Wherein, third preset height range refers under glass water tank normal operating conditions, by utilization electric current-height
The height for the glass stone that m- height function obtains when the height and utilization of the bath of glass that degree function obtains makes the difference, and obtains the two
Between height difference.
It should be noted that the first preset height threshold value, the second preset height threshold value and third are default in the present embodiment
Height threshold is the difference in height being obtained ahead of time, and three preset height threshold values can be equal, can also be unequal, and concrete condition needs
It is determined according to actual measured results.
When concrete application, when the bath of glass height obtained according to operating current and the bath of glass difference in height according to time acquisition
Value in third preset height range, i.e., in the error range of permission when, show that glass water tank is working properly.
When the bath of glass height that controller is obtained according to operating current and the bath of glass height that is obtained according to the working time it
When difference is less than third preset height range, illustrate that glass water tank leaks, the reason is that, when glass water tank leaks
When, bath of glass tails off, and resistance becomes smaller, and when motor driven bath of glass is sprayed from rain brush, required operating current is smaller, due to preparatory
In electric current-height function of acquisition, when electric current is smaller, corresponding bath of glass height is lower.And controller works according to motor
When the sum of time calculates glass water tank residue bath of glass height, used bath of glass height when motor is opened only is considered, and
Do not consider the problems of that glass water tank leaks bath of glass height, calculated bath of glass height is compared with the height of actual glass water
The height obtained according to operating current is big, therefore, when the corresponding bath of glass height of operating current glass corresponding with the working time
When the difference of water height is less than third preset height range, illustrate that glass water tank leaks.
For above-mentioned judging result, when judging that glass water tank leaks, time for having leaked of bath of glass is obtained, it can be with
By specific time showing on vehicle displays, so that driver can overhaul glass water tank in time, avoid due to bath of glass
It has leaked and has led to not clean windshield, influenced driving experience.
In some embodiments, when judging that the glass water tank leaks, according to presently described bath of glass water
Bath of glass height and the height that bath of glass declines by leakage in the glass water tank in the unit time, predict bath of glass in case
The required time is leaked, to have leaked required time alarm driver according to the bath of glass.
When detecting that glass water tank leaks, controller passes through glass in glass water tank in detection certain time
The height change of water obtains the height h0 of bath of glass leakage in the unit time, and pre- according to the height and h0 of current glass water
It surveys bath of glass and has leaked required time, thus according to time alarm driver.For example, controller is in not sent motor open signal
In the case where, detect that the leakage height of bath of glass in 24 hours is 5cm, it is assumed that the bath of glass height of current glass water tank is
50cm, then glass water tank will leak after can obtaining 240 hours.
Certainly, the time of above-mentioned acquisition is only that bath of glass has leaked the required time, if usually utilizing bath of glass cleaning gear
Wind glass, it is also necessary to consider that each motor opens the bath of glass height used, it is remaining in rear glass water tank using using every time
The height of bath of glass recalculates bath of glass and has leaked the required time, to remind driver to supplement glass according to correct time
Water or maintenance glass water tank.
In the present embodiment, the size for the height h0 that can also be leaked according to bath of glass in the unit time carries out different stage
Warning, so as to remind in time driver maintenance or replacement glass water tank.If h0 is larger, shows that leakage situation is serious, give
The warning of driver's level-one is given, to remind driver to overhaul in time；If h0 is less than normal, show that leakage situation is not serious, not shadow
Normal use is rung, the warning of driver's second level is given.
It should be noted that the present embodiment predict bath of glass leaked required time when, using the process of leakage as at the uniform velocity
Leakage process is handled.Certainly, in practical application, different processing modes can be selected to carry out according to different leakage situations
Prediction, the present embodiment is it is not limited here.
Equipment provided in an embodiment of the present invention using bath of glass height in sound detection water tank, by comparing operating current
Whether the height difference of the corresponding bath of glass of frequency of corresponding bath of glass height and bath of glass voice signal, judge motor
It breaks down, so as to remind driver to overhaul in time.Moreover, it is also possible to by obtaining the sum of motor working time,
M- height function obtains working time corresponding bath of glass height when utilization, and by comparing the corresponding bath of glass of operating current
The difference of height bath of glass height corresponding with the working time, judges whether glass water tank occurs leaking or rain brush pipeline goes out
The problems such as now blocking is found the problem in time, and driver is reminded to overhaul, and is improved the user experience.
Furthermore it is also possible to be verified using electric current-height function to using the bath of glass height of sound detection, controller
The height of the bath of glass obtained using frequency-height function is carried out making the difference ratio with using operating current acquisition bath of glass height
Compared with, when difference is within the scope of the first preset height, show using in sound detection water tank bath of glass height it is accurate.
Embodiment three
The present embodiment additionally provides a kind of Wiper system, below in conjunction with attached drawing to the present embodiment provides the Wiper systems changed
It is introduced.
Referring to Fig. 3, which is a kind of Wiper system structure chart provided in an embodiment of the present invention.
The Wiper system of the present embodiment includes bath of glass height in the utilization sound detection water tank of embodiment one and embodiment two
The equipment 301 of degree, further includes: glass water tank 103, rain brush 104 and motor 105.
Wherein, equipment 301, for detecting the height of bath of glass in glass water tank 103.
Glass water tank 103 is connect for accommodating bath of glass with rain brush 104.
Motor 105, for driving the bath of glass in glass water tank 103 to spray from rain brush 105.
It should be noted that being realized in the present embodiment using the equipment concrete function of bath of glass height in sound detection water tank
Function described in embodiment one or embodiment two can be participated in, details are not described herein.
The Wiper system provided through this embodiment, by utilizing the height of bath of glass in sound detection glass water tank,
To realize the height for promptly and accurately detecting bath of glass, and then before bath of glass is finished, bath of glass is supplemented, to utilize glass
Water and rain brush clean windshield, improve driving experience.
It should be appreciated that in this application, " at least one (item) " refers to one or more, and " multiple " refer to two or two
More than a."and/or" indicates may exist three kinds of relationships, for example, " A and/or B " for describing the incidence relation of affiliated partner
It can indicate: only exist A, only exist B and exist simultaneously tri- kinds of situations of A and B, wherein A, B can be odd number or plural number.Word
Symbol "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or"." at least one of following (a) " or its similar expression, refers to
Any combination in these, any combination including individual event (a) or complex item (a).At least one of for example, in a, b or c
(a) can indicate: a, b, c, " a and b ", " a and c ", " b and c ", or " a and b and c ", and wherein a, b, c can be individually, can also
To be multiple.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (12)
1. a kind of equipment using bath of glass height in sound detection water tank, which is characterized in that be applied to glass water tank, this sets
Standby includes: microphone module and controller；
The glass water tank, for accommodating bath of glass；
The glass water tank connecting windscreen wiper；
The glass water tank further includes motor, and the motor is used to drive the bath of glass in the glass water tank from the rain
Brush sprays；
The controller, for sending motor open signal to the motor；
The microphone module, for obtaining the voice signal of bath of glass when the motor is opened；
The controller, for carrying out the frequency that spectrum analysis obtains the voice signal to the voice signal, by frequency-height
Degree function obtains the height of the corresponding bath of glass of frequency of the voice signal；Frequency-the height function first passes through test in advance
It obtains.
2. the equipment according to claim 1 using bath of glass height in sound detection water tank, which is characterized in that described to set
It is standby further include: current detection circuit；
The current detection circuit, for obtaining the operating current of the motor；
The controller, the height for the corresponding bath of glass of operating current for being also used to obtain the motor by electric current-height function；
Electric current-the height function first passes through test in advance and obtains；When the height and the work for judging the corresponding bath of glass of the frequency
When the difference of the height of the corresponding bath of glass of electric current is not within the scope of the first preset height, electrical fault is judged.
3. the equipment according to claim 2 using bath of glass height in sound detection water tank, which is characterized in that the control
Device processed is also used to obtain the sum of described motor working time；By when m- height function obtain the motor work at present time pair
The height for the bath of glass answered；M- height function first passes through test in advance and obtains when described；
The controller is also used to judge the corresponding bath of glass height of frequency bath of glass corresponding with the working time
When the difference of height is greater than the second preset height range, judge that rain brush pipeline blocks；
When judging that the corresponding bath of glass height of the operating current and the difference of the working time corresponding bath of glass height be less than
When third preset height range, judge that the glass water tank leaks.
4. the equipment according to claim 1 using bath of glass height in sound detection water tank, which is characterized in that the control
Device processed is also used to believe from the sound before carrying out the voice signal spectrum analysis and obtaining the frequency of the voice signal
Screening sends motor closing to the motor to the motor transmission motor open signal moment positioned at the controller in number
Fragment of sound signal between the signal moment.
5. the equipment according to claim 1 using bath of glass height in sound detection water tank, which is characterized in that the wheat
Gram wind module, is also used to be obtained ahead of time the background noise signal when motor is not turned on, and by the background noise signal
It is sent to the controller；
The controller is carrying out the voice signal before spectrum analysis obtains the frequency of the voice signal, be also used to from
The background noise signal is subtracted in the voice signal.
6. the equipment according to claim 5 using bath of glass height in sound detection water tank, which is characterized in that the wheat
The background noise signal when motor is not turned on is obtained ahead of time in gram wind module, specifically:
The microphone module repeatedly obtains the background noise signal when motor is not turned in advance, and will repeatedly be carried on the back
Scape voice signal is sent to the controller；
The background noise signal repeatedly obtained will be averaged as final background noise signal by the controller；
The controller subtracts the background noise signal from the voice signal, specifically:
The controller subtracts the final background noise signal from the voice signal.
7. the equipment according to claim 1 using bath of glass height in sound detection water tank, which is characterized in that the frequency
Rate-height function first passes through test in advance and obtains, specifically:
The test data of voice signal corresponding frequency and bath of glass height is repeatedly obtained in advance；
It is carried out curve fitting according to the test data, obtains the frequency-height function.
8. the equipment according to claim 3 using bath of glass height in sound detection water tank, which is characterized in that the control
Device processed, when judging that the glass water tank leaks, according to bath of glass height and list in presently described glass water tank
Bath of glass predicts that bath of glass has leaked the required time because of the height of leakage decline in the glass water tank in the time of position, so as to
Required time alarm driver has been leaked according to the bath of glass.
9. the equipment according to claim 1 using bath of glass height in sound detection water tank, which is characterized in that the control
Device processed is that unique ID is arranged in the motor, and the controller is that unique ID is arranged in the rain brush；
The controller sends the motor open signal to the motor by the ID of the motor, and the controller passes through institute
The ID for stating rain brush sends rain brush open signal to the rain brush；By the glass water-driven to the rain brush when motor is opened
It sprays.
10. the equipment according to claim 1 using bath of glass height in sound detection detection water tank, which is characterized in that
The controller is located at automobile or is located at remote server.
11. the equipment according to claim 10 using bath of glass height in sound detection detection water tank, which is characterized in that
The equipment further includes remote server；
The controller is also used to the voice signal being sent to the remote server；
The remote server, for carrying out the frequency that spectrum analysis obtains voice signal to the voice signal by neural network
Rate, by the height for the corresponding bath of glass of frequency that frequency-height function obtains the voice signal.
12. a kind of Wiper system, which is characterized in that described in any item using in sound detection water tank including claim 1-11
The equipment of bath of glass height, further includes: glass water tank, motor and rain brush.
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| CN201810936032.0A CN109060077B (en) | 2018-08-16 | 2018-08-16 | Equipment for detecting glass water height in water tank by using sound and windshield wiper system |
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