JPH10260262A - Automatic testing apparatus for radiation-monitoring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an automatic test by selecting an optimum count rate on the basis of a simulation signal input pattern preliminarily set by a work station and inputting a count rate signal to a test signal generator. SOLUTION: An alarm set value, an input count rate set value are set on a program beforehand at a work station 8, and the alarm set value is tested and confirmed. The work station 8 monitors values of a counter 6, selects an input count rat in a manner described below, and inputs a count rate signal to a test signal generator 2. The input count rate set values of relatively large values are first input stepwise to make a count value close to the alarm set value at high speed, and then the input count rate set values are input in lumps to a slightly larger value than the alarm set value so as to change the count value finely in the vicinity of the alarm set value. A change pattern of input count rates as above is a simulation signal optimum input pattern. A test can be carried out automatically without manually setting a test signal or confirming the count value by eyes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic test apparatus for a radiation monitoring apparatus (abbreviation: RMS) for automatically inputting an appropriate simulation signal when testing the radiation monitoring apparatus.

[0002]

2. Description of the Related Art For example, when a test for confirming an alarm set value of a radiation monitoring apparatus (RMS) is performed, a simulation signal is input to the radiation monitoring apparatus from a test signal generator to actually activate an alarm, thereby setting the alarm set value. Make a confirmation. FIG. 5 is a block diagram in which a test signal generator is connected to the radiation monitoring apparatus at the time of testing the conventional radiation monitoring apparatus. In the figure, 1
Is a measurement processing unit of the radiation monitoring apparatus, 2 is a test signal generator, 3 is a control circuit provided inside the test signal generator 2, 4 is a switch for setting a count rate of a simulation signal to be input, and 5 is an input. This is a switch for setting whether the simulation signal to be input is input in a step-like manner or in a ramp-like manner.

Next, the operation will be described. When the 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 performing an alarm set value confirmation test, an operator sets a value near the alarm set value with the switch 4 in order to quickly bring the count value closer to the alarm set value, and sets the changeover switch 5 so as to constantly input the value. . This is called step input. When the count value approaches the alarm set value, the changeover switch 5 is set to a mode in which the input count rate is gradually changed so as to generate an alarm at a value closer to the alarm set value and approach the alarm set value. This is called lamp input. As described above, the switching setting of the step input and the lamp input of the changeover switch 5 is manually set by an operator at an appropriate count value while checking the display 7. Next, when the count value exceeds the alarm set value, the value on the display 7 is held, and the operator confirms that the value is within a predetermined error range with respect to the alarm value.

[0004]

Since the test signal generator in the conventional radiation monitoring apparatus is constructed as described above, after the operator manually sets the input counting rate, the counting rate indicated by the radiation monitoring apparatus is changed. The switch must be manually set while checking the indicated value, and the operation is complicated, requires skill, and is a difficult operation that cannot be performed by a person without knowledge. In addition, the test of the radiation monitoring apparatus requires a lot of effort because the same content is periodically tested for many channels. Therefore, it is necessary to save labor by setting parameters in advance and programming them.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an automatic test apparatus for a radiation monitoring apparatus capable of automatically inputting an appropriate simulation signal without operating a switch. Aim.

[0006]

An automatic test apparatus for a radiation monitoring apparatus according to the present invention is provided with a test signal generator for inputting a simulation signal to the radiation monitoring apparatus, and a preset setting while reading a count rate indication value of the radiation monitoring apparatus. A workstation for selecting an optimal count rate of the simulated signal based on the simulated signal input pattern and inputting the count rate signal to the test signal generator, and a CRT for displaying a time transition of the count rate. is there.

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 sequentially selects some test signals of a predetermined count rate and instructs the test signal generator to output.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a first embodiment of the present invention will be described 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 a 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 above-mentioned conventional ones. The workstation 8 reads the value of the counter 6 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 the signal 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.

Next, the operation will be described. The alarm setting value Xn,
Input count rate set values Xnxa, Xnxb, Xnxc (a,
b and c are fixed values, and c <1 <b <a) is set. Next, when the alarm set value check test is started (selection and execution is performed with a button on the CRT 9 screen), a signal of the input count rate set value is input to the test signal generator 2 from the workstation 8. The signal is converted by the communication conversion circuit 10 and the control circuit 3
The 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 as shown in FIG. That is, when the value of the count value R of the counter 6 is sufficiently smaller than the alarm set value Xn (R <Xn
Xc) As the simulation signal, a constant value of the count rate (Xn × a) is input. This is called step input (201). When the count value R increases to near Xn (R ≧ Xn × c), (20)
2) The input is performed by changing the input count rate at a fixed rate up to the count rate Xn × b (c <1 <b <a). This is called a lamp input (203). The above operation is performed because the counter 6 has the time constant τ and responds to the input with a delay of τ time. As described above, at first, a somewhat large value Xn × a is input in a step-like manner, and the count value is brought close to the alarm set value Xn at high speed.
In order to finely change the count value in the vicinity of n, the input count rate is input in a ramp shape 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 referred to as a simulated signal optimum input pattern. In addition,
When there are a plurality of alarm setting values, it is needless to say that the program can be executed in the same manner as described above by using a program in which the input count rate is changed.

As described above, 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 indication value of the radiation monitoring apparatus, are used. A workstation for selecting the optimum count rate and inputting the count rate signal to the test signal generator is provided, so that the test of the radiation monitoring device can be automatically performed without manually setting the test signal or visually checking the count value. Can be done with

Embodiment 2 FIG. In addition, the radiation monitoring apparatus has independent measurement processing units for different measurement points (channels) of the plant, and each measurement processing unit has an individual alarm set value. By setting the pattern in the workstation in advance, the work can be performed more efficiently.

Embodiment 3 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 some 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 or not the radiation monitoring apparatus takes a predetermined operation with respect to the input of the overrange count rate, the first embodiment and The same effect as that of No. 2 can be obtained.

Embodiment 4 In a test for checking whether the test signal generator 2 itself outputs a predetermined count rate signal with a predetermined accuracy, it is possible to simplify a process of manually setting a preset count rate by automatically outputting the 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 sent to an external counter 11
And the measurement result is taken into the workstation 8 and displayed on the CRT 9. The work station 8 makes a determination by setting a determination criterion in advance in a program as to whether the measurement result is within a predetermined accuracy range, and confirms the soundness of the test signal generator 2. As described above, in the program of the workstation 8, several test signals of a predetermined count rate are sequentially selected and the output is instructed to the test signal generator 2, thereby simplifying the manual test process. Can be.

[0015]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, 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 a count rate indication value of the radiation monitoring apparatus. , A workstation for selecting the optimal count rate of the simulation signal and inputting the count rate signal to the test signal generator, without manually setting the test signal or visually checking the count value. Can be performed automatically.

According to the second aspect of the present invention, the work station has a simulation signal optimum input pattern for each of a large number of measurement channels (measurement points) of the radiation monitoring apparatus, so that the work can be performed more efficiently. Can be done.

According to the third aspect of the present invention, in a test for confirming whether or not the test signal generator itself outputs a predetermined count rate signal with a predetermined accuracy, a program of a workstation is used to execute several predetermined programs. Since the test signals having the count rates of (1) and (2) are sequentially selected and the output is instructed to the test signal generator, the step 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 a workstation 8 of FIG.

FIG. 3 is a diagram showing a 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 device.

[Description of Signs] 1 Measurement processing unit of radiation monitoring device 2 Test signal generator 3 Control circuit 4 Switch 5 Changeover switch 6
Counter 7 Display 8 Workstation 9 CRT 10 Communication conversion circuit 11 External counter

Claims (3)

[Claims] 1. A test signal generator for inputting a simulation signal to a radiation monitoring apparatus, and an optimal counting of a simulation signal based on a simulation signal input pattern set in advance while reading a count rate indication value of the radiation monitoring apparatus. An automatic test apparatus for a radiation monitoring apparatus, comprising: a workstation for selecting a rate and 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 testing apparatus for a radiation monitoring apparatus according to claim 1, wherein the workstation has a simulation signal optimum input pattern for each of a large number of measurement channels of the radiation monitoring apparatus. 3. In the test signal output accuracy test of the test signal generator, the workstation is configured to sequentially select some predetermined count rate test signals and instruct the test signal generator to output. The automatic testing apparatus for a radiation monitoring apparatus according to claim 1, wherein: