JPH02189420A - Digital panel meter - Google Patents

Abstract

PURPOSE:To convert the detected result from a detecting device in a desired unit and to display the result by setting the relationship between input values and display values with a setting means, operating the display values in correspondence with the input values based on said relationship, and displaying the result. CONSTITUTION:The result of detection from a detecting device 1 is inputted into an operating means 3 through an input part 2. Then, in a setting means 4, at least two arbitrary input values X1 and X2 in the input part 2 and reference display values Y1 and Y2 corresponding to the input values X1 and X2 are set. Then, in the operating means 3, display values corresponding to the input values in the input part 2 are operated in accordance with the relationship between the input values X1 and X2 and the display values Y1 and Y2. The result of the operation is displayed on a display part 5. In this way, the detected data from the detecting device are converted into the data in a desired unit and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a digital panel meter that is installed in a factory inspection line or a control panel of a testing device and displays detection data of a detection device.

(bl) Conventional technologyIn the production line of a product in a factory, an inspection is sometimes carried out to check whether the shape and weight of the product are appropriate.For example, as shown in FIG. When detecting the weight of the product 95 conveyed by the weight detection sensor 93 and distinguishing between a suitable product and an inappropriate product, the detection result of the detection sensor 93 is input to the panel meter 91.This panel meter 91 The input from the detection sensor 93 is compared with a reference value, and a signal output when the two do not match is used to detect, for example, the conveyor belt 9.
2 is stopped. Conventionally, a digital panel meter has been used as this panel meter, which has a digital display in order to facilitate the interpretation of input from a detection sensor.

(C1 Problem to be solved by the invention) However, in conventional digital panel meters, the analog data input from the detection device was digitized by an A/D converter and displayed as is.
The input analog data and the display value displayed on the display unit were in the same unit. In other words, the input current or electric current is displayed on the display unit in its original unit.

Therefore, in order to know the weight of the product 95 in the example shown in FIG. 16, for example, it is necessary to read the current or voltage displayed on the display section of the digital panel meter and convert this value into weight.

An object of the present invention is to enable manual setting of the relationship between an input value and a display value, calculate a display value corresponding to the input value according to this relationship, and display it on the display, thereby obtaining a value converted into a desired unit. The objective is to provide a digital panel meter that can display the following.

(d) Means for Solving the Problems The panel meter of the present invention is a digital panel meter comprising an input section into which a detection result of a detection device is input, and a display section that digitally displays a displayed value. , both of which are two arbitrary manpower values (X+
, Xz ) and the input values (X+ ,
, Y2) for calculating a display value corresponding to the input value of the input section.

That is, as shown in FIG. 1, the calculation means converts the input value input from the detection device into the input section into a display value according to a predetermined relationship. The setting means outputs two input values (X, , xz) that determine a predetermined relationship in the calculation means and reference display values (Y+, Y) corresponding to each of these input values.
z) is set and input.

(e) Effect In this invention, as shown in FIG. 12(A), at least two input values X, , X and reference display values Y, , Y2 corresponding to each of the input values are manually set. Ru.

In a digital panel meter, the display relative to the input has a linear relationship, so when two input values and their corresponding reference display values are set in this way, the relationship between the input value and display value shown in the figure is can get. Based on this relationship, the display value corresponding to the human power value is determined by the calculation means,
This calculation result is displayed on the display section. Therefore, the value of the detection target in the unit to be displayed on the display (weight: kg, etc.) is input as the reference display value Y,,Y, and the direct detection data of this detection target is input as the input value X.
1. When set manually as Xz, the value obtained by converting the detection data of the detection device into the desired unit is displayed on the display section.

(f) Embodiment ■Functional Description A panel meter according to an embodiment of the present invention has the following functions.

i-Scaling Function This function forms a feature of the invention. That is,
Calculate the detection data of the 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) Base reference value setting function This is a function to manually set 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, HH, H, and L.

Reference values can be set for each of the four levels of LL.

iii List function This is a function to test the main operation by giving an input value figuratively by key manual input instead of 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 to display the detection data input from the main operation function detection device on the display section according to the above-mentioned scaling function, and to output a signal according to the comparison result in the comparison section and the above-mentioned 1V linear output signal.

■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
is a 4% digit numerical display whose most significant digit only displays 1. Above this numerical display, display lamps 3a to 3e are provided.
is provided.

The display 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 display 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. A data readout display lamp 4 and a peak/bottom lamp 5 are provided on the right side of the numerical display 2.

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. Furthermore, a changeover switch 12 and a dip switch 13 are provided inside the lid 11. When the data key 7 is operated during the main operation, the data readout display lamp 4 lights up, the 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. If the data key 7 is operated again within a certain period of time, the display lamp 3b
They light up in the order -+3c→3d-+3a, and the reference value serving as the threshold value for each level range is displayed. Further, when setting a reference value and setting a linear output, the display lamps 3a to 3d are turned on in sequence by operating the data key 7 to display the level at which the numerical value is set. Furthermore, when scaling, by operating this data key 7, the display lamp 3b→
3c → 3a → 3d light up in order to display the numerical value to be set. This display value is not a threshold as described above, but a value for determining the slope (coefficient) when performing scaling processing.

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 display 2 using the cursor key 1O, 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 for changing the input range and setting the measurement range, and the dip switch 13 selects the function to be executed from among the above-mentioned functions i to (2) 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 peak/bottom hold mode, and when the hold mode is set, either the maximum value or the minimum value is displayed on the numerical display 2 by operating the enter key 8. is displayed, and at this time the peak/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 l. 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.

The same figure (A) shows the output part 15a of the contact output, and the same figure (B
) shows the output section 15b of the transistor output, and (C
) indicates the output section 15c of 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 I can be output.

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

Detection data from a detection device (not shown) input to an input section 14 is input to a microcomputer 2I provided in the panel meter main body 1 via an amplifier 25 and an A/D converter 24. The microcomputer 21 also includes a changeover switch 12, a dip switch 13, and keys 7 to 1.
Manual data of 0 is input. microcomputer 2
A ROM 23 connected to I stores a program that defines the operation of the microcomputer 21. In addition, the key 7 is stored in the RAM 26, which has been assigned a backup function.
Scaling values, reference values, etc. manually set through 10 on/off operations are stored.

The microcomputer 21 outputs the manually inputted detection data from the A/D conversion 2S24 to the output unit via the output sofa 22 based on model data, scaling values, reference values, and the like. The main body 1 is connected to any one of a contact output section 15a, a transistor output section 15b, or a BCD output section 15c. 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, the control "data" is connected to the photocoupler 3.
The transistor is outputted via the open collector terminal via 2. Further, when the BCD output section 15C is connected, the control data is once launched from the photocoupler 33 to the launch circuit 34, converted into a BCD code, and outputted from the 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 manually changes the range by changing the gain at the input stage including the amplifier 25. Further, the human power section 14 includes four input terminals, each of which has a resistor with a different resistance value.

Therefore, the gain of the amplifier 25 can also be changed by appropriately selecting a terminal to which the detection output of a detection device (not shown) is connected.

(2) Explanation of Operation FIGS. 6 to 11 are flowcharts 1 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 the disable switch 13 are read out (n2), and it is determined which function is selected (n3 to n6).

ii Scaling function setting If the scaling function setting is selected, the seventh
Execute the processing in the scaling setting mode shown in the figure. In this scaling setting mode, each setting of X2, Y2, XI, and Y shown in FIG. 12(A) is performed together with the setting of the decimal point (n11 to n15). Here, each time the data key 7 is operated, the display lamp 3b→3
a → 3C → 3d lights up in order to indicate the value to be set X2-Y2
-X.

→Y+ is shown in order, and the numerical value is displayed on the numerical display 2 using the count up key 9 and the cursor key 10,
Enter this value using the enter key 8. In this way, the input value X1. Display values Y+ and Yz corresponding to X2 are set. These nil to n15 correspond to the processing of the setting means shown in FIG. Each value is 19999 to -1999
It can be set in the range of 9, and the input value is displayed high [12th
Figure (B)), inverse proportional display [Figure 12 (C)] and ~
It can be displayed in a display state such as a ten range display [FIG. 12(D)]. After setting each numerical value and decimal point, a data check is performed (n16). This data check confirms that the input value Xl+×2 is within the input range set by the changeover switch 12, and that the displayed value Y
Check that +, Yz are displayable numerical values, and that the input values XX2 are not the same numerical value. If the set values are determined to be appropriate in the data check, a registration process is performed to store these values in the RAM 26 (n17), and if the set values are inappropriate, an error message is displayed. Perform error handling (
n18).

1i Setting of reference value When the reference value setting function is selected, Fig. 8 (A)
As shown in (021 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. When the reference (direct HH,) (, L, LL, and hysteresis are set, a data check is performed (n26). This data check is performed to ensure that each item is within the display range and that HYS≠O HH≧H LL≦L H Determine whether the relationship ≧L+HYS holds true.In the data check, if the set value is appropriate, each item is RA
A registration process is performed to store it 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 human power value is compared with each reference value during main operation as shown in Figure 13, and the HH output is , H output, PASS output, L output and LL
Each specific output is output.

FIG. 8(B) is a flowchart showing details of each setting input process in the reference value setting mode. When the data key 7 is operated (n71), the operation of the enter key 8 is determined (n72), and when the enter key 8 is operated, the display value obtained by scaling the current input is displayed on the numerical display 2 (n72). 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 this, 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 (n7
6).

iv Setting the linear output When the linear output setting function is selected, as shown in Fig. 9, the setting input for the 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 amplifier 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 displayed manually by the operation of the enter key 8. After this, perform a data check of the input linear setting value (n33
). 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 input as described above, the display values in the range of linear setting values L to H are assigned to the range of output values M in ” M a Such a linear output function is executed only when a linear output unit (not shown) equipped with a D/A converter etc. is attached to the panel meter main body l.This allows scaling processing to be performed. The displayed value can be displayed on an analog meter.

■Test mode When the test function is selected, as shown in FIG. After performing scaling processing on the test data, display processing, comparison output processing, linear output processing, and BCD output processing are executed (042
~n45). Furthermore, if a serial communication unit is attached to the main body 1, communication processing is executed (046).

In the display process at n42, 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 first
The output shown in the lower part of Figure 3 is performed. In the linear output process at n44, the display value corresponding to the test data is converted into a value corresponding to the manually set linear setting value in the linear output setting mode and is output. In the n45's BCD output processing, the display value corresponding to the test data is converted to binary coded decimal (BCD).
Convert to data and output. In the communication processing of 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 FIG.
In order to reduce the influence of noise, perform a data check to determine whether the data input manually from the input unit 14 via the /D conversion unit 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 human power value and the output value in the panel meter 1 (n53).
. In this calibration process, as shown in FIG. 15, the error between the actual output values La, Ha and the ideal output values, H, is calibrated using the following equation.

Calibration value = (H-L) / (Ha-La) x (input value - 1
,a) +l.

Scaling processing is performed using the calibration values calibrated using the above formula (n54). In this scaling process, using the values set and input in the process shown in FIG.
)×(calibration value-XI) 10Y.

Find the displayed value by This n54 is the processing of the calculation means shown in FIG.

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 linear output process (n58) are performed depending on the output section installed on the main body l.
), or execute BCD output processing (n 59). Furthermore, if a serial communication unit is attached to the main body 1, communication processing is executed (n60).

(Effect of the Phantom Invention According to this invention, the relationship between the input value and the display value is set by the setting means, the display value corresponding to the input value is calculated according to this relationship, and the result of this calculation is displayed on the display section. This has the advantage that the detection result of the detection device can be converted into a desired unit and displayed on the display section, and there is no need to convert the displayed value into the desired unit after reading it.

[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 11 are flowcharts showing the processing procedure of the control section of the panel meter, FIG. 6 shows the processing procedure of the initial operation, FIG. 7 shows the processing procedure related to the scaling setting mode, and FIG. Figures 8 (A) and (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 FIG. 11 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 human power 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.

Claims (1)

[Claims] (1) In a digital panel meter equipped with an input section into which the detection results of the detection device are input and a display section that digitally displays the displayed value, at least two arbitrary input values (X_1
, X_2) and the reference display values (Y_1, Y_2) corresponding to the input values (X_1,
_1, Y_2) for calculating a display value corresponding to the input value of the input section.