JPH0443220B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a multi-point recording device,
Specifically, the present invention provides a multi-point recording device equipped with a digital multimeter function.

[Prior art] A type of multi-point recording device is shown on pages 9 to 13 of Yokogawa Technical Report (Vol. 25, No. 4) published by Yokogawa Electric Corporation on December 20, 1981. There is a scanner which is configured to digitally display the magnitude of an analog input signal selectively sent out from a scanner and record it in an analog manner using a dot pattern.

Incidentally, such a conventional multi-point recording apparatus is configured such that all analog input signals are selectively sent out at fixed time intervals via a scanner. Therefore, according to such a configuration, the magnitude of all analog input signals is measured intermittently according to the scan period.
Unlike a digital multimeter, it is not possible to continuously measure the magnitude of a specific analog input signal and display it digitally, or use the scan pause period to operate the digital multimeter function and display the measurement result digitally. .

[Object of the Invention] The present invention has been made with attention to the above points, and its purpose is to use the digital multimeter function as needed without impairing the original functions of the multi-point recording device. An object of the present invention is to provide a multi-point recording device capable of digitally displaying the magnitude of a specific analog input signal.

[Summary of the Invention] To achieve the above object, the present invention converts analog input signals selectively sent from a scanner into digital signals by applying them to an A/D converter, and converts each analog input signal into a digital signal according to the converted digital signal. In a multipoint recording device that is configured to digitally display the magnitude of an analog input signal and record it in an analog manner using a dot pattern, there is a sub-input terminal that is independent from the input terminal group of the scanner, and a direct current that is applied to the sub-input terminal. A voltage division function that divides voltage or AC voltage, a resistance voltage conversion function that converts the resistance value applied to the sub input terminal into DC voltage, and an effective value conversion function that converts the divided AC voltage to DC voltage. a signal conversion section that converts the analog input signal into a signal in the same form as the output signal of the scanner according to a function selected according to the analog input signal applied to the sub-input terminal; operation mode selection means for selecting a logging mode, a digital multimeter mode, and a trend/logging/digital multimeter mode;
In addition to the D converter, a control means controls the output data to be read out and digitally displayed on a display without recording, and the output signal of the scanner and signal converter is controlled by selecting a trend/logging mode. a control means for selecting the A/D converter, reading out the output data from the A/D converter, displaying it digitally on a display, and performing trend/logging recording; The signal converter is controlled to convert the analog input signal applied to the sub-input terminal according to the selected function, and the output signal of this signal converter is converted into an A/D converter.
In addition to the converter, there is also a control means for controlling the output data to be read out and displayed digitally on a readout display, and a control means for selecting the output signal of the scanner during the scan period by selecting the trend/logging/digital multimeter mode. In addition to the A/D converter, the output data is read out and displayed digitally on the display and controlled to perform trend/logging recording, and during the scan pause period, the output signal of the signal converter is added to the A/D converter. and control means for controlling the output data to be read out and digitally displayed on a display.

[Example] Hereinafter, it will be explained in detail using the drawings.

FIG. 1 is a configuration explanatory diagram showing one embodiment of the present invention, in which 1 ₁ to 1n are input terminals to which analog input signals are applied, and 2 is an analog input signal applied to input terminals 1 ₁ to 1n in sequence. 3 is a sub-input terminal independent from the input terminals ₁₁ to 1n of the scanner 2, and 4 is a scanner which converts the analog input signal applied to the sub-input terminal 3 into the same signal form as the output signal of the scanner 2. The signal converter that sends out the
5 is an amplifier that amplifies the analog output signal of the scanner 2 and the signal converter 4 to a predetermined size; 6 is an A/D converter that converts the output signal of the signal converter 4 amplified by the amplifier 5 into a digital signal; 7 is a first memory that temporarily stores the output signal of the A/D converter 6; 8 is a recording paper; 9 is a paper feeding mechanism using a pulse motor, for example, for moving the recording paper 8; 10 is a paper feeding mechanism 9 a drive circuit; 11 a recording head for recording multicolor dots in predetermined colors corresponding to input signals on the recording paper 8; 12 a drive circuit for the recording head 11;
Reference numeral 13 denotes a recording head moving mechanism using, for example, a pulse motor, for raster scanning the recording head 11 in a direction perpendicular to the feeding direction of the recording paper 8; 15 is a second memory that temporarily stores the digital signal sent from the scanning circuit 14; 16 is an arithmetic control circuit using, for example, a microprocessor; 17 is a character; 18 is a display that digitally displays information related to measurement; 19 is a drive circuit for the display 18; 20 is the operating mode of the device, the type of input signal, the measurement range,
A keyboard for setting the recording range, alarm setting values, paper feed speed, etc., 21 is the keyboard interface, 22 is an input/output port, 23 is a battery for backing up the memories 7 and 15, and 24 is a voltage drop in the battery 23. An alarm circuit for detecting , P is a panel. Furthermore, when the recording head 11 reaches the end of the scan area of the recording head 11 or at least one end of the scan area of the recording head 11, an end signal is generated and the position data of the recording head 11 is reset. An end detection means is provided but not shown.

The operation of the device configured in this way will be explained.

The analog input signals applied to the input terminals 1 ₁ to 1n are sequentially selected by the scanner 2 controlled by the arithmetic control circuit 16 at a period of 0.15 seconds per point, for example, and applied to the amplifier 5 . On the other hand, the analog input signal applied to the sub-input terminal 3 is also applied to the amplifier 5 via the signal converter 4 controlled by the arithmetic control circuit 16. For example, a DC voltage of 0 to 50V or a resistance signal of 0 to 300Ω is applied to the input terminals 1 ₁ to 1n, and a voltage of ±±, for example, is applied to the sub input terminal 3.
A DC voltage of 20mV to ±50V, an AC voltage of 2V to 250V or a resistance signal of 200Ω to 2MΩ is applied. FIG. 2 is a circuit diagram showing a specific example of the signal converter 4, in which 4A indicates a DC voltage or an AC voltage, for example from 0 to
4B is a voltage dividing circuit that divides the voltage to 2V according to the set measurement range.
RMS value conversion circuit that converts to ~2V DC voltage, 4C
is a resistance voltage conversion circuit that converts the resistance value into a DC voltage of, for example, 0 to 2V according to the set measurement range,
SW1 to SW5 are switches, and each of these components is driven and controlled by the arithmetic control circuit 16.
That is, if both the automatic recording instruction key and the digital multimeter mode setting key, which will be described later, are off, the output signal of the scanner 2 and the output signal of the signal converter 4 are sequentially selected and displayed on the display 18 without recording. When the automatic recording instruction key is on and the digital multimeter mode setting key is off, the scanner 2's output signal and signal conversion are controlled to display the monitor mode according to the selected trend mode or logging mode. Part 4
When the automatic recording instruction key is off and the digital multimeter mode setting key is on, the automatic recording instruction key is off and the digital multimeter mode setting key is on. is controlled to enter the digital multimeter mode in which the output signal of the signal converter 4 is continuously displayed on the display 18, and is selected when the automatic recording instruction key and the digital multimeter mode setting key are both on. The output signals of the scanner 2 are sequentially selected and displayed on the display 18 according to the trend mode or logging mode being used for trend recording or logging recording, and the analog output of the signal converter 4 is performed during these scan interval pause periods. It is controlled to be in a trend/logging/digital multimeter mode in which the signal is sampled, converted to a digital signal, and its magnitude is displayed digitally. FIG. 5 is a time chart showing these operations, where a shows the operation in trend/logging mode, b shows the operation in digital multimeter mode, and c shows the operation in trend/logging/digital multimeter mode. It shows.

As the amplifier 5, for example, a programmable gain amplifier is used. The gain of this amplifier 5 is controlled by the arithmetic control circuit 16 so as to operate in conjunction with the scanner 2 or the signal converter 4, and the output signal is, for example, 0 to 0, regardless of the magnitude of each analog input signal.
Amplify it to 2V. The analog output signal sent from the amplifier 5 is converted into a digital signal by the A/D converter 6 and stored in the first memory 7. This data is linearized according to the type of input and stored as a signal for display and logging, and is also used as a signal for trend recording, for example, from 0 to 1500 in 0.1 mm steps to correspond to a width of 150 mm. Converted to a number and stored. Note that these scanner 2, signal converter 4, amplifier 5
The analog section consisting of the A/D converter 6 and the A/D converter 6 is connected to the other digital section via a photocoupler. This allows the analog part and the digital part to be completely electrically isolated.

The recording paper 8 is intermittently fed by a predetermined amount by a paper feeding mechanism 9 controlled by an arithmetic control circuit 16, for example, each time the recording head 11 is scanned.

As the recording head 11, an inkjet head, a wire dot head, a disposable pen head, etc. are used. For example, the inkjet head has three primary colors (cyan C,
Magenta (M), yellow (Y)) are constructed so that dots can be recorded discretely at constant intervals along the direction of movement of the recording head 11. As shown in FIG. 4, the wire dot head corresponds to the ink ribbon 11A that is fed along the feeding direction of the recording paper 8 and is dyed in multiple colors in the width direction, and the number of color bands of this ink ribbon 11A. A dotting mechanism 11 has a plurality of dotting needles that are arranged along the feeding direction of the recording paper 8 and selectively drive to transfer a predetermined color of the ink ribbon 11A.
Use one consisting of b. As a disposable pen head, a plurality of disposable pens with different ink colors are respectively attached to the recording head 11.
A device configured to record dots discretely at constant intervals along the direction of movement of the dot is used. The recording head 11 configured in this manner has a recording head moving mechanism 1 controlled by an arithmetic control circuit 16 in a direction perpendicular to the feeding direction of the recording paper 8.
3, when the recording paper 8 stops feeding, raster scanning is performed at, for example, 0.1 mm/step. Recording head 11
The position of is converted into a digital signal and temporarily stored in the second memory 15. Although this embodiment shows an example in which a common memory is divided and used as the first memory 7 and the second memory 15, independent memory may be used.

In the trend mode, the arithmetic control circuit 16 reads out all data corresponding to the input signal stored in the first memory 7 and data corresponding to the position of the recording head 11 stored in the second memory 15. , detects data that has the smallest difference from the data stored in the second memory 15 from among the data stored in the first memory. Then, the recording head 11 is moved by a predetermined amount along the scanning direction according to the difference, and when the difference becomes zero, the recording head 11 is caused to record dots of a predetermined color corresponding to the selected input terminal. sends out control signals for Note that when sending out these control signals, the recording position of each color can be corrected. Such a correction is performed by, for example, adding a phase difference signal to each input signal stored in the first memory 7 with respect to a reference element of each element of the recording head 11 that records a predetermined color assigned to each input terminal. Just add or subtract. Further, when recording, two or more colors may be mixed as necessary. By sequentially performing such operations during one scanning process of the recording head 11, the magnitude of each input signal can be recorded in analog dots in a predetermined color. In the logging mode, the recording head 11 is controlled to digitally record the magnitude of each input signal, for example in a single color. In the trend mode and logging mode, the display 18 is controlled to digitally display the magnitude of each input signal at a cycle different from the switching speed and recording speed of the scanner 2. In the digital multimeter mode, the display 18 is controlled to digitally display the measured value of the input signal applied to the sub-input terminal 3. As a result, the display 18 continuously digitally displays the magnitude of the input signal applied to the sub-input terminal 3. In the trend/logging/digital multimeter mode, the analog output signal of the signal converter 4 is sampled and converted to a digital signal during the scan interval pause period of the trend mode and the logging mode, and its magnitude is digitally displayed on the display 18. It turns out. Note that by turning on a manual recording instruction key to be described later, the magnitude of each input signal can be digitally recorded. In addition, the arithmetic control circuit 16 also performs control for tabulating and recording measurement setting conditions, control of changing the setting values of various parameters using the keyboard 20, and the like. Note that these various control operations are executed based on a predetermined program.

FIG. 6 is a specific example of the panel P shown in FIG. 1, and FIG. 7 is an enlarged explanatory view of the display 18, and the same parts as in FIG. 1 are given the same reference numerals. In FIG. 6, 20 ₁ is an operation mode selection key for selecting trend mode or logging mode; 20 ₂
2 is a display selection key for selecting a display target on the display 18; ₂₀₃ is a channel selection key for selecting a channel to be displayed; ₂₀₄ is a parameter selection key for selecting a parameter to be set;
₀₅ is a scan selection key to select the scan mode, ₂₀₆ is a list recording instruction key, ₂₀₇ is an automatic recording instruction key, ₂₀₈ is a manual recording instruction key, ₂₀₉
is the chart paper feed key, 20 ₁₀ is the data input key for inputting various data and measurement range data in digital multi mode, 20 ₁₁ is the power switch, 20 ₁₂ is the key lock switch, 20
₁₃ is a digital multimeter mode setting key to select the digital multimeter mode, and 20 _{and 14} are the digital multimeter mode setting keys that control the measurement of the signal converter 4 according to the form of the measurement signal (DC voltage DC, AC voltage AC, resistance signal Ω). Digital multimeter selection key for selecting mode.

With this configuration, in monitor mode, the output signals of the scanner and signal converter are digitally displayed on the display without recording them, and in trend/logging mode, the output signals of the scanner and signal converter are digitally displayed on the display. In digital multimeter mode, the output signal of the signal converter is continuously digitally displayed on the display, and trend/logging/
In digital multimeter mode, during the scan period, the output signal of the scanner is digitally displayed on the display, and trend/logging recording is performed, and during the scan pause period, the output signal of the signal converter can be digitally displayed continuously on the display. .

Here, in the monitor mode and the trend/logging mode, the output signals of the scanner and the signal converter are digitally displayed on the display at equal intervals, and in the digital multimeter mode, the multipoint recording device no longer performs its original function. On the other hand, in the trend/logging/digital multimeter mode, it operates as a multi-point recording device during the scan period, and functions as a digital multimeter during the scan pause period to continuously digitally display the output signal of the signal converter on the display. Therefore, the output signal of the signal converter can be measured and displayed on the display at a shorter measurement cycle than in the monitor mode and trend/logging mode without impairing the original functions of the multi-point recording device.

In the above embodiment, a multi-point, multi-color recording device has been described, but a multi-point, single-color recording device may also be used.

[Effects of the Invention] As explained above, according to the present invention, the magnitude of a specific analog input signal can be digitally displayed using the digital multimeter function without impairing the original functions of the multi-point recording device as necessary. A multi-point recording device can be realized.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention;
FIG. 2 is a circuit diagram showing a specific example of a signal converter used in the present invention, FIGS. 3 and 4 are configuration explanatory diagrams showing specific examples of a recording head used in the present invention, and FIG. 5 is a circuit diagram showing a specific example of a recording head used in the present invention. Time chart of operation, No. 6
The figures are an explanatory view of the configuration of a specific example of the panel in FIG. 1, and FIG. 7 is an enlarged explanatory view of the display 18. 1 ₁ ~ 1n...Input terminal, 2...Scanner, 3
...Sub-input terminal, 4...Signal converter, 5...Amplifier, 6...A/D converter, 7, 15, 17...Memory, 8...Recording paper, 9...Paper feeding mechanism, 10...
... Paper feed mechanism drive circuit, 11 ... Recording head, 1
2... Recording head drive circuit, 13... Recording head moving mechanism, 14... Scanning circuit, 16... Arithmetic control circuit, 18... Display, 19... Display drive circuit, 20... Keyboard, 21... ...keyboard interface, 22...input/output port, P...panel.

Claims (1)

[Claims] 1 Analog input signals selectively sent out from the scanner are added to an A/D converter to convert them into digital signals, and the magnitude of each analog input signal is digitally displayed according to the converted digital signals. In addition, in a multi-point recording device configured to record in an analog manner using a dot pattern, there is a sub-input terminal independent from the input terminal group of the scanner, and a voltage divider that divides the DC voltage or AC voltage applied to the sub-input terminal. functions, a resistance voltage conversion function that converts the magnitude of the resistance value applied to the sub input terminal into a DC voltage, and an effective value conversion function that converts the divided AC voltage to a DC voltage. a signal converter that converts the analog input signal into a signal in the same form as the output signal of the scanner according to a function selected according to the analog input signal to be input; operation mode selection means for selecting a /logging/digital multimeter mode; and an operation mode selection means for selecting an output signal of the scanner and the signal converter when the monitor mode is selected;
In addition to the D converter, a control means controls the output data to be read out and digitally displayed on a display without recording, and the output signal of the scanner and signal converter is controlled by selecting a trend/logging mode. a control means for selecting the A/D converter, reading out the output data from the A/D converter, displaying it digitally on a display, and performing trend/logging recording; The signal converter is controlled to convert the analog input signal applied to the sub-input terminal according to the selected function, and the output signal of this signal converter is converted into an A/D converter.
In addition to the converter, a control means controls the output data to be digitally displayed on a readout display, and a control means that selects the output signal of the scanner during the scan period by selecting the trend/logging/digital multimeter mode. In addition to the A/D converter, the output data is read out and displayed digitally on the display and controlled to perform trend/logging recording, and during the scan pause period, the output signal of the signal converter is added to the A/D converter. 1. A multi-point recording device, comprising: control means for controlling the output data to be read out and digitally displayed on a display.