JP3749338B2 - Automatic testing equipment for radiation monitoring equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic test apparatus for a radiation monitoring apparatus (abbreviation: RMS) that automatically inputs an appropriate simulation signal when testing the radiation monitoring apparatus.
[0002]
[Prior art]
For example, when an alarm set value confirmation test of a radiation monitoring apparatus (RMS) is performed, an alarm set value is confirmed by inputting a simulation signal to the radiation monitoring apparatus from a test signal generator and actually operating an alarm.
FIG. 5 is a block diagram in which a test signal generator is connected to the radiation monitoring apparatus during testing of the conventional radiation monitoring apparatus. In the figure, 1 is a measurement processing unit of a radiation monitoring apparatus, 2 is a test signal generator, 3 is a control circuit provided in the test signal generator 2, and 4 is a switch for setting a count rate of input simulated signals. Reference numeral 5 denotes a change-over switch for setting whether to input the simulation signal to be input stepwise or rampwise.
[0003]
Next, the operation will be described. When a simulation signal is input from the test signal generator 2 to the measurement processing unit 1 of the radiation monitoring apparatus, the counter 6 counts with a certain time constant and displays the count rate on the display 7.
For example, when an alarm set value confirmation test is performed, in order to quickly bring the count value close to the alarm set value, the operator sets a value in the vicinity of the alarm set value with the switch 4, and sets with the changeover switch 5 so as to input the value constantly. . This is called step input.
When the count value reaches the vicinity of the alarm set value, the change-over switch 5 is set to a mode in which the input count rate is gradually changed so that the alarm is generated at a value closer to the alarm set value to approach the alarm set value. This is called ramp input.
In this way, the switching setting between the step input and the lamp input of the changeover switch 5 is manually set at an appropriate count value while the operator confirms the display 7.
Next, when the count value exceeds the alarm set value, the value of the display unit 7 is held, and the worker confirms that the value is within a predetermined error range with respect to the alarm value.
[0004]
[Problems to be solved by the invention]
Since the test signal generator in the conventional radiation monitoring apparatus is configured as described above, after the operator manually sets the input count rate, the switch is manually operated while checking the count rate indicating value indicated by the radiation monitoring apparatus. This is a difficult task that cannot be performed by a person without knowledge.
In addition, the radiation monitoring apparatus test requires a lot of labor since the same test is periodically performed on many channels. Therefore, it is necessary to save labor by setting parameters in advance and programming them.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an automatic test apparatus for a radiation monitoring apparatus that can automatically input an appropriate simulation signal without requiring a switch operation. .
[0006]
[Means for Solving the Problems]
An automatic test apparatus for a radiation monitoring apparatus according to the present invention is based on a test signal generator for inputting a simulation signal to the radiation monitoring apparatus and a simulation signal input pattern set in advance while reading the count rate instruction value of the radiation monitoring apparatus. A workstation that selects an optimum count rate of the simulation signal and inputs the count rate signal to the test signal generator, and a CRT that displays a time transition of the count rate are provided.
[0007]
In addition, the workstation has a simulation signal optimum input pattern for each of many measurement channels of the radiation monitoring apparatus.
[0008]
Further, in the test signal output accuracy test of the test signal generator, the workstation sequentially selects several test signals having a predetermined count rate and instructs the test signal generator to output.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an automatic test apparatus for performing an alarm set value confirmation test among tests of a radiation monitoring apparatus with simulated signal input according to Embodiment 1 of the present invention.
In FIG. 1, reference numerals 1, 4 to 7 are the same as the conventional ones.
The workstation 8 reads the value of the counter 6 obtained by counting the simulation signal with a certain time constant, and transmits an appropriate operation signal to the test signal generator 2 according to the value. The communication conversion circuit 10 receives a signal from the workstation 8 and transmits it to the control circuit 3. The CRT 9 displays the count value and the test signal input count rate in real time.
FIG. 2 is a flowchart in the program of the workstation 8.
[0010]
Next, the operation will be described. Alarm setting value Xn, input count rate setting value Xn × a, Xn × b, and Xn × c (a, b, and c are fixed values and c <1 <b <a) are set in advance on the program in the workstation 8 To do. Next, when the alarm set value confirmation test is started (selected with the button on the CRT 9 screen), the signal of the input count rate set value is input from the workstation 8 to the test signal generator 2. The signal is converted by the communication conversion circuit 10 and transmitted to the control circuit 3, and a simulation signal is input from the test signal generator 2 to the measurement processing unit 1 of the radiation monitoring apparatus.
The value of the counter 6 is monitored by the workstation 8 and the input count rate is selected according to the flowchart of FIG. 2 as shown in FIG.
That is, when the count value R of the counter 6 is sufficiently smaller than the alarm set value Xn (R <Xn × c), the simulation signal is inputted with a constant value of the count rate (Xn × a). This is called step input (201).
When the count value R rises to near Xn (R ≧ Xn × c) (202), the input count rate is changed and input at a constant rate until the count rate Xn × b (c <1 <b <a). This is called ramp input (203).
The above operation is performed because the counter 6 has a time constant τ and responds to the input with a delay of τ time.
In this way, first, a certain large value Xn × a is input in a stepwise manner, the count value is brought close to the alarm set value Xn at high speed, and then the input count is used to finely change the count value near the alarm set value Xn. The rate is input in a ramp shape up to a value slightly larger than the alarm set value Xn.
By doing so, the alarm set value can be confirmed in a shorter time.
Such a change pattern of the input count rate is called a simulated signal optimum input pattern.
Of course, when there are a plurality of alarm set values, the program can be implemented in the same manner as described above with a program that changes the input count rate.
[0011]
As described above, based on the test signal generator for inputting the simulation signal to the radiation monitoring apparatus and the simulation signal input pattern set in advance while reading the count rate instruction value of the radiation monitoring apparatus, the optimum counting of the simulation signal is performed. With a workstation that selects the rate and inputs the count rate signal to the test signal generator, the radiation monitoring device can be automatically tested without manual setting of the test signal and visual confirmation of the count value. Can do.
[0012]
Embodiment 2. FIG.
In addition, the radiation monitoring device has an independent measurement processing unit for each different measurement point (channel) in the plant, and there is an individual alarm setting value in each measurement processing unit, so that the simulated signal optimum input for each channel By setting the pattern in the workstation in advance, the work can be performed more efficiently.
[0013]
Embodiment 3 FIG.
In the first and second embodiments, the alarm set value confirmation test has been described. However, the alarm operation confirmation test for confirming whether the alarm operates reliably, or the input of the radiation monitoring apparatus for several predetermined count rates. In the input / output characteristic test for confirming the characteristics of the signal and the output signal, and also in the overrange characteristic test for confirming whether the radiation monitoring apparatus takes a predetermined operation with respect to the overrange count rate input, The same effect as 2 is obtained.
[0014]
Embodiment 4 FIG.
In a test for confirming whether the test signal generator 2 itself outputs a predetermined count rate signal with a predetermined accuracy, it is possible to simplify the manual setting process by automatically outputting a preset count rate. it can.
That is, in FIG. 4, a predetermined simulated input count rate is set on the program of the workstation 8, and the control circuit 3 of the test signal generator 2 is instructed to output some predetermined count rates. The count rate output is measured by the external counter 11 and the measurement result is taken into the workstation 8 and displayed on the CRT 9.
Whether the measurement result is within a predetermined accuracy range is determined in advance in the program by setting a determination criterion in the program, and the soundness of the test signal generator 2 is confirmed.
In this way, in the program of the workstation 8, several test signals having a predetermined count rate are selected in order and the output is instructed to the test signal generator 2, thereby simplifying the manual process of the test. Can do.
[0015]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0016]
According to the first aspect of the present invention, a simulation signal is generated based on a test signal generator for inputting a simulation signal to the radiation monitoring apparatus and a simulation signal input pattern set in advance while reading the count rate instruction value of the radiation monitoring apparatus. And a workstation that inputs the count rate signal to the test signal generator, so that the radiation monitoring device can be tested without manual setting of the test signal and visual confirmation of the count value. Can be done automatically.
[0017]
Further, according to the invention of claim 2, the workstation has a simulation signal optimum input pattern for each of many measurement channels (measurement points) of the radiation monitoring apparatus, so that the work can be performed more efficiently. Can do.
[0018]
According to a third aspect of the present invention, in a test for confirming whether the test signal generator itself outputs a predetermined count rate signal with a predetermined accuracy, some predetermined count rates are determined by the workstation program. Since the test signals are sequentially selected and the output is instructed to the test signal generator, the process of manually setting the test can be simplified.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a first embodiment of the present invention.
FIG. 2 is a flowchart of a program of the workstation 8 of FIG.
FIG. 3 is a diagram showing transition of an input count rate and a count value according to the first embodiment of the present invention.
FIG. 4 is a block diagram showing a fourth embodiment of the present invention.
FIG. 5 is a block diagram showing a conventional apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Measurement processing part of radiation monitoring apparatus 2 Test signal generator 3 Control circuit 4 Switch 5 Change-over switch 6 Counter 7 Display 8 Workstation 9 CRT
10 Communication conversion circuit 11 External counter

Claims (3)

Based on the test signal generator that inputs the simulation signal to the radiation monitoring device and the simulation signal input pattern set in advance while reading the count rate instruction value of the radiation monitoring device, the optimum count rate of the simulation signal is selected. An automatic test apparatus for a radiation monitoring apparatus, comprising: a workstation for inputting a count rate signal to the test signal generator; and a CRT for displaying a time transition of the count rate. 2. The automatic test apparatus for a radiation monitoring apparatus according to claim 1, wherein the workstation has a simulation signal optimum input pattern for each of a number of measurement channels of the radiation monitoring apparatus. In the test signal output accuracy test of the test signal generator, the workstation is configured to sequentially select a plurality of test signals having a predetermined count rate and instruct the test signal generator to output the test signal. An automatic test apparatus for a radiation monitoring apparatus according to claim 1.

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