JPH02189419A - Digital panel meter - Google Patents

Abstract

PURPOSE:To simplify the setting work of a reference value by providing a reference-value setting means which sets detected data that are inputted from a detecting device as the reference value. CONSTITUTION:The detected data from a detecting device 1 are supplied to a display part 2, a comparing part 3 and a reference-value setting part 4 in a panel meter 11, respectively. Then, the detected data are displayed on the display part 2. The detected data are compared with a reference value which is supplied from the setting part 4 in the comparing part 3. The result of the comparison is outputted into an external device from the output part 5. Since the detected data which are outputted from the device 1 are set as the reference value in the setting part 4, the setting work of the reference value can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a panel meter that is mounted on a control panel of a factory inspection line, test equipment, etc., and displays detection data of a detection device.

fb) Conventional technology Some panel meters attached to control panels compare the detection data of a detection device with a predetermined reference value and output a signal in accordance with the comparison result. For example, as shown in FIG. 16, a weight sensor 93 that outputs a voltage corresponding to the weight of the product 950 is provided below the conveyor 92 that conveys the product 95, and the output voltage of this weight sensor 93 is input to the panel meter 91. . panel meter 91
The voltage input to the weight sensor 93 is compared with a preset reference value, and if the output voltage of the weight sensor 93 is not within the normal range, the operation of the motor 94 is stopped by a signal output from the panel meter 91, and the product 95 is stopped. Stop transport. In addition to this, a warning light may be turned on based on a signal from the panel meter 91, or an inappropriate product 95 may be directed to another conveyance path.

In addition, the shape of the product can be inspected by appropriately changing the detection device, and pressure can also be controlled by supplying the signal output from the panel meter to the actuator that drives the valve.

(C) Problems to be Solved by the Invention However, in conventional panel meters, the reference value to be compared with the detection data of the detection device was set by operating the volume or up/down keys. During inspection, it is necessary to read the output voltage of the weight sensor when a product of the appropriate weight is being transported, and then enter this value into the panel meter again using the volume control or key operation, which complicates the work. there were.

An object of the present invention is to provide a panel meter that allows detection data input from a detection device to be set as a reference value, thereby simplifying the work of setting and inputting the reference value.

(d) Means for Solving the Problems The panel meter of the present invention displays detection data input from a detection device, compares it with a reference value, and outputs a signal according to the comparison result. The present invention is characterized in that a reference value setting means is provided for setting detection data input from the detection device as a reference value.

That is, as shown in FIG. 1, the detection data of the detection device is supplied to each of the display section, comparison section, and reference value setting section of the panel meter. The display section displays this detection data, and the comparison section compares the detection data with a reference value supplied from the reference value setting section, and outputs the comparison result to the signal output section. The signal output section outputs a signal according to the comparison result to an external device.

(e) Effect In the present invention, the reference value setting section sets the detection data output from the detection device as a reference value, and supplies this to the comparison section. Therefore, the reference detection target (reference object)
It is possible to supply the detection data of the detection device to the comparison unit as a reference value and compare the detection data of the detection device to other detection targets (objects to be measured). Embodiment ■Functional Description The panel meter according to the embodiment of the present invention has the following functions.

j Calculate the detection data of the scaling function detection device based on a predetermined relationship,
This function displays this result on the display section. For example, when the detection data of the detection device is output in units of mA, a value converted to units of kg is displayed.

ii.Reference value setting function This function constitutes a characteristic part of the present invention. That is,
This is a function for setting and inputting a reference value to be compared with the detection data input from the detection device in the comparison section. In the panel meter of this embodiment, reference values can be set for each of the four levels of HH, HL, and LL.

iii.Test function This is a function to test the main operation by giving a pseudo input value manually using the keys instead of the actual input.

iv Linear Output Setting Function This is a function that sets a maximum value and a minimum value for this output value when analog outputting the calculation result obtained by the scaling function of i above, and linearly outputs within the range.

(2) A function of displaying the detection data input from the main operation function detection device on the display section according to the scaling function of i above, and outputting a signal according to the comparison result in the comparison section and a linear output signal of above iv.

■Explanation of the configuration Figure 2 (A) is a front view of the above panel meter, and Figure 2 (B) is a front view of the above panel meter.
FIG. 2 is a diagram showing main parts from the front.

A 5-digit, 7-segment numerical display 2 is provided at the center of the front of the panel meter main body 1. This numerical display 2
The most significant digit displays only 1. The indicator lamps 3a to 3d display the level of the display value displayed on the numerical display 2 during main operation. For example, when the level is very low, the lamp 3d indicating LL lights up.

Furthermore, the level or set point of the input numerical value is displayed during scaling, reference value setting, and linear output setting. This meaning will be explained later. Numerical display 2
A data readout display lamp 4 and a beak/bottom lamp 5 are provided on the right side.

Further, a cover 6 is provided on the lower side of the numerical display 2 with a hinge at the lower part so that the cover 6 can be opened and closed. Inside this cover 6 are a data key 7, an enter key 8, and a count up key 9.
and a cursor key 10. Further, a changeover switch 12 and a dip switch 13 are provided inside the lid 1). When the data key 7 is operated during the main operation, the data readout display lamp 4 lights up, the level display lamp 3a lights up, and the reference value serving as the threshold value of the HH level range is displayed on the numerical display 2. When the data key 7 is operated again within a certain period of time, the level display lamps 3b, 3C, 3d, and 3a are lit in this order, and the reference value serving as the threshold value for each level range is displayed. Also, when setting the reference value and setting the linear output, the data key 7
As a result of the operation, the level display lamps 3a to 3d are lit in order to display the level at which the numerical value is set. Furthermore, during scaling, by operating this data key 7, the level display lamps 3b-3c→3a→3d are lit in the same order.
Display the value to be set. This displayed value is not the threshold value as mentioned above, but the slope when performing the scaling time theorem (
This is the value for determining the coefficient.

The enter key 8, count up key 9, and cursor key 10 are all keys used to set and input numerical values during the scaling, setting of each value, and linear output setting. That is, a digit is selected on the numerical value display 2 using the cursor key 10, and the numerical value of the selected digit is changed using the count up key 9. By operating the enter key 8, the numerical value displayed on the numerical display 2 is set. The selector switch 12 is a switch that manually switches the range and sets the measurement range, and the dip switch 13 selects the function to be executed from among the above-mentioned functions i=v by a combination of on/off.

FIG. 3 is an assembly diagram of the panel meter in the rear direction.

An input section 14 is formed by a plurality of terminal connection sections at the lower part of the back surface of the panel meter main body 1. Three terminals among these multiple terminals are terminals related to the execution of the peak/bottom hold mode, and when the hold mode is set, the numerical display 2 displays either the maximum value or the minimum value by operating the enter key 8. is displayed, and at this time the beak/bottom indicator lamp 5 lights up.

An opening 16 is formed in the upper part of the back surface of the panel meter main body 1. The output section 15 is fitted into the panel meter 1 through this opening 16. At this time, the connection terminal part 17 of the output part 15 is fitted into the connector 18 provided inside the panel meter 1. FIGS. 4(A) to 4(C) show the output part forming part of the panel meter. FIG. 2 is a rear view and an output terminal configuration diagram.

(A) to (C) of the same figure show the output part 15a of the contact output,
The same figure (B) shows the output part 15b of the transistor output,
FIG. 2C shows the output section 15c for BCD output.

The output parts 15a to 15c are all formed in a shape that fits into the panel meter main body 1 through the opening 16, and the output part to be attached to the panel meter main body 1 is selected from among the output parts 15a to 15C. Accordingly, a signal corresponding to the device connected to the panel meter 1 can be output.

FIG. 5 is a block diagram of the panel meter.

Detection data from a detection device (not shown), which is input to an input section 14, is input to a microcomputer 21 provided in the panel meter main body 1 via an amplifier 25 and an A/D converter 24. In addition, the microcomputer 21 includes a changeover switch 12, a dip switch/receiver 13, and keys 7 to 7.
1o input data is input. A ROM 23 connected to the microcomputer 21 stores a program that defines the operation of the microcomputer 21.

Further, the RAM 26, which is battery-operated, stores scaling values, reference values, etc. set and inputted by the on/off operations of the keys 7 to 1O.

The microcomputer 21 outputs the detection data input from the A/D converter 24 to the output section via the output sofa 22 based on model data, scaling values, reference values, and the like. A contact output section 15a, a transistor output section 15b, or a BCD output section 15c is connected to the main body l. When the contact output 15a is connected, control data is output from the output cover sofa 22 to the relay driver 31, and the relay driver 31 opens and closes the relay contacts based on this control data. When the transistor output section 15b is connected, control data is outputted from the transistor through the photocoupler 32 and the open collector terminal. Furthermore, when the BCD output section 15c is connected, the control data is transferred from the photocoupler 33 to the latch circuit 34.
The signal is then converted into a BCD code and output via an open collector terminal.

Furthermore, the microcomputer 21
The gain of the amplifier 25 is changed according to the measurement range set in step 2. The microcomputer 21 changes the manual range by changing the gain of the amplifier 25. In addition, the input section 14 includes four input terminals,
Each has a resistor with a different resistance value. For this reason,
The gain of the amplifier 25 can also be changed by appropriately selecting a terminal to which a detection output of a detection device (not shown) is connected.

(2) Description of Operation FIGS. 6 to 1) are flowcharts showing the processing procedure of the control section of the digital panel meter.

i Initial Operation As shown in FIG. 6, when the power is turned on, the microcomputer 21 loads the data stored in the RAM 26.
Read out to the storage area in the microcomputer 21 (
nl). Next, the states of the selector switch 12 and dip switch 13 are read (n2), and it is determined which function is selected (n3 to n6).

ii. Configure the scaling function. In this scaling setting mode, the digits of X2, Y2, Xl, and Yl shown in FIG. 12(A) are set together with the decimal point (n1) to n15). Here, each time the data key 7 is operated, the display lamp 3b
→3a→3cm=3d lights up in order and the value to be set
z - Y z → X1 → Y1 are shown in order, and the numerical value display 2 is
Display a numerical value, and input this numerical value using the enter key 8. In this way, the display values Y, , Y, corresponding to the input values X+, Xz are set.

Each numerical value can be set in the range of 19999 to -19999, and the input value can be displayed in a high range display [Figure 12 (B)], inversely proportional display [Figure 12 (C)], and - to + range display [Figure 12 (D)]. After setting each numerical value and decimal point, a data check is performed (n16). This data check is based on the input value
, Xz are within the input range set by the selector switch 12, and the displayed value Y1. Check that Yz is a displayable numerical value and that the input values X, , X2 are not the same numerical value. If the values set in the data check are determined to be appropriate, a registration process is performed to store these values in the RAM 26 (n17).
), and if the set value is inappropriate, error processing is executed to display an error message (n18).

iii Setting the reference value When the reference value setting function is selected, the procedure shown in Fig. 8 (A)
As shown in (n21 to n25), reference values HH, H, L, LL and hysteresis (HYS) are set.
. When the data key 7 is operated, the display lamps 3a to 3d are turned on in order to display the value to be set as the reference value. During this display, numerical values are displayed on the numerical display 2 using the count up key 9 and cursor keys 10, and settings are input using the enter key 8. Standard value H
When H, H, L, LL and hysteresis are set, a data check is performed (n26). This data density determines whether each item is within the display range and whether the following relationships hold: HYS≠0 HH≧H LL≦L H≧L + HY S . In the data check, if the set values are appropriate, each item is RA
A registration process is performed to be stored in M26 (n27), and if it is inappropriate, an error process is performed to display an error message (n28).

When the reference values HH, H, L, LL and hysteresis (HYS) are set and input as described above, the input values are compared with each reference value during main operation as shown in Figure 13, and the HH output is performed. , H output, PASS output, L output and LL
Each of the outputs is printed.

FIG. 8(B) is a flowchart showing in detail the setting input process for each value in the reference value setting mode. When the data key 7 is operated (n71), the operation of the enter key 8 is determined.1)72) If the enter key 8 is operated, the display value obtained by scaling the current input is displayed on the numerical display 2. (n73). If the count up key 9 and the cursor key 10 are operated here, the numerical value displayed on the numerical display 2 is changed according to the content of the operation (n74). After that, the system waits for the operation of the enter key 8 (n75), and when the enter key 8 is operated, the value displayed on the numerical display 2 is set as the reference value (n
76).

In the above processing, n'72-"n 73-n 74
-f176 corresponds to the processing of the reference value setting section in FIG.

Setting of 1V linear output When the linear output setting function is selected, as shown in Fig. 9, the setting input of linear setting values H and L is received (
n31. n32). In the setting input of this linear set value, the display lamps 3b and 3c are displayed by operating the data key 7.
lights up, the linear setting value H or L to be input is displayed, and the count up key 9 and cursor key 10 are pressed.
The value to be set is displayed on the numerical display section 2 by the operation of , and the value to be set is input by operating the enter key 8. After this, perform a data check on the input linear setting values (n3
3). In this data check, it is determined whether the linear set values H and L are within the display range. If the linear setting value is an appropriate value, a registration process is performed to store it in the RAM 26 (n34), and if it is inappropriate, an error process is performed (n35).

When the linear setting values are inputted as described above, the displayed values in the range of linear setting values L to ■() are assigned to the range of output values Min-Max and linearly outputted, as shown in FIG. Such a linear output function is executed only when a linear output section (not shown) equipped with a D/A converter etc. is attached to the panel meter main body 1.This allows the scaled display value to be Can be displayed on an analog meter.

■Test mode When the test function is selected, as shown in Figure 10, test data is input manually by operating the enter key 8, count up key 9, and cursor key 10 (n41), and the input After performing scaling processing on the test data, display processing, comparison output processing, linear output processing, and BCD output processing are executed (n42~
n45). Furthermore, if a serial communication unit is attached to the main body 1, communication processing is executed (n46). n
In the display process at 42, a display value obtained by scaling the test data is displayed on the numerical display section 2. In the comparison output process of n43, the displayed value is compared with the reference value set and input in the reference value setting mode, and the 13th
The output shown in the lower part of the figure is produced. In the linear output processing at n44, the display value corresponding to the test data is changed into a value corresponding to the linear setting value set and input in the linear output setting mode, and is output. In the BCD output process of n45, the display value corresponding to the test data is converted into binary coded decimal (BCD) data and output. In the communication processing of the n46, scaling processing is executed using data input from an external device such as a personal computer via the serial communication unit as test data, and the result is output to the external device via the serial communication unit.

vi Main operation When the main operation is selected, as shown in Figure 1), A
In order to reduce the influence of noise, a data check is performed to determine whether the data input from the input section 14 via the /D conversion section 24 is within the measurement range (n51).
Find the average value of multiple pieces of data input continuously (n
52). After this, a calibration process is performed to calibrate the error between the input value and the output value in the panel meter 1 (n 53
). In this calibration process, as shown in FIG.
Actual output values La, Ha and ideal output values, H
Calibrate the error with the following formula.

Calibration value = (H-L)/(Ha-La) x (input straight line - La) +L Scaling processing is performed using the calibration value that has been calibrated according to the above formula (n54). In this scaling process, using the values set and input in the process shown in Fig. 7, the display value = (Yz - Y+) / (xz - XI)
Find the displayed value by ×(calibration value -X, ) +Y.

The display value thus determined is compared with the maximum and minimum values up to that point. If the displayed value determined in n54 exceeds the maximum value up to that point, that value is stored as the maximum value, and if the displayed value is lower than the minimum value up to that point, it is stored as a new minimum value. Next, the obtained display value is converted into 7-segment display data and output to the numerical display 2 (n56), and a comparison output process (n57) and a 'J near output process (n56) are performed depending on the output unit installed in the main body 1. n5
'8) or execute BCD output processing (n59).

Furthermore, if a serial communication unit is attached to the main body 1, communication processing is executed (n60).

fg1 Effects of the Invention According to this invention, the detection data input from the detection device can be directly set as a reference value, and when setting the reference value, the detection output of the detection device in an appropriate state is read, and this value is then read. There is no need to perform the complicated work of re-entering data, and the work of setting the reference value can be simplified.

[Brief explanation of the drawing]

Figure 1 is a functional block diagram showing the configuration of this invention, Figure 2 (A) is a front view of a panel meter that is an embodiment of this invention, and Figure 2 (B) shows the main parts of the front of the panel meter. Figure 3 is an assembly diagram of the panel meter in the rear direction, Figures 4 (A) to (C) are rear views and output terminal configuration diagrams of the output section attached to the panel meter, and Figure 5 is an assembly diagram of the panel meter in the rear direction. It is a block diagram of the same panel meter. 6 to 1) are flowcharts showing the processing procedure of the control section of the panel meter, FIG. 6 shows the processing procedure of the initial operation, and FIG. 7 shows the processing procedure related to the scaling setting mode, FIGS. 8(A) and 8(B) show the processing procedure in the reference value setting mode;
The figure shows the processing procedure in linear output setting mode.
The figure shows the processing procedure in the test mode, and Figure 1) shows the processing procedure in the main operation mode. Figure 12 (A
) to (D) are diagrams showing the relationship between input values and output values due to scaling processing, Figure 13 is a diagram showing the relationship between input and output due to the comparison function, and Figure 14 is a diagram showing the reference value and output in linear output processing. FIG. 15 is a diagram showing the relationship between input and output in the calibration process. Also the 16th
The figure is a schematic diagram illustrating how the panel meter is used. 1-Panel meter body. Figure 2 (A) Figure 4 (A) (B) (C) Figure (A) Figure 12 (A) (B) (C) (D) Figure Figure 14 Input 15 display values

Claims (1)

[Claims] (1) In a panel meter that displays the detection data input from the detection device, compares it with a reference value, and outputs a signal according to the comparison result, the detection data input from the detection device is set as the reference value. A panel meter characterized by being provided with a reference value setting means.