JPH0410593B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a radiation dosimeter with an alarm that measures radiation dose and issues an alarm when the measured value exceeds a predetermined set value, and in particular checks its measurement function and alarm function. Concerning a method for checking the functionality of a radiation dosimeter.

Conventionally, some radiation dosimeters with alarms of this type can only check their radiation detection section, but this type automatically checks the overall function including the detection section and measurement circuit, as well as the operation of the alarm. There is nothing to be gained so far. In other words,
Normally, it is confirmed that the radiation dosimeter is operating normally by operating a switch from the outside to activate the alarm, or by irradiating radiation to activate the alarm. The problem is that it takes time and effort.

This invention was made in view of these points,
An object of the present invention is to provide a checking method that can automatically perform measurement and alarm functions in a radiation dosimeter easily and quickly.

The feature is that the radiation dosimeter is electromagnetically or optically coupled to the checker that controls the dosimeter to measure the dose of minute radiation sources in the checker, allowing the checker to determine whether or not the dosimeter can measure correctly. The dosimeter is configured to check whether the alarm operates normally by sending a predetermined signal from the checker to the alarm within the dosimeter.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of this invention.
FIG. 2 is a flowchart for explaining the operation. In Fig. 1, 1 is a radiation dosimeter;
2 is a checker, and the dosimeter 1 is a dosimeter microcomputer consisting of a ROM (read only memory) 11, a RAM (random access memory) 12, a CPU (computation and control unit) 13, and an I/O (input/output device) 14. (hereinafter also simply referred to as a microcomputer), a data transmitter/receiver 15, a checker insertion switch 16, a detection section 17, and an alarm 18. , a usable indicator 24, a minute radiation source 25, and a magnet 26.

That is, when checking the functionality of the dosimeter 1, the dosimeter 1 and checker 2 are connected by a contact method using a connector or a non-contact method using a photoelectric element, etc., and signals are exchanged between them. do. In addition, here, a magnet 26 is placed inside the checkerboard.
On the other hand, for example, a magnetic switch 16 is provided inside the dosimeter, so that when the dosimeter 1 is inserted into or approaches the checker 2, the switch 16 is operated, thereby starting a predetermined operation. Ru.

The operation will be explained below with reference to FIGS. 1 and 2.

First, when the dosimeter 1 is connected to or brought close to the checker 2 (see Figure 2), the switch 16 inside the dosimeter is turned on, and a check operation start signal is sent to the dosimeter microcomputer via the I/O 14. It will be done.
As a result, the dosimeter 1 sends an operation start signal to the checker 2 via the data transmitter/receiver 15 (see ○ and b in FIG. 2), causing the checker control circuit 22 to operate. Therefore, the checker 2 sends a counting operation start signal to the dosimeter 1 to start counting operation (see ○C in Figure 2), so the dosimeter 1 receives this signal, and the radiation detector and the counting circuit The radiation dose from the minute radiation source 25 in the checker is measured via the detection unit 17 including the detector 17, and the measured value is sent to the checker (see ○D in FIG. 2). Chietsuka 2 is
It is determined whether the measured value sent from the dosimeter 1 is within a predetermined range (see Figure 2),
If it is normal, it will move on to the next operation, but if it is abnormal, it will be displayed on the abnormality indicator 23 in the checker (see Figure 2), and the measurement function (detector) will be activated for the dosimeter 1. and circuits) are defective. On the other hand, if the measurement function is normal, the checker 2 sends a count reset signal from the checker control circuit 22 to the dosimeter microcomputer via the data transmitter/receiver 21, and sets the measured value of the minute radiation dose to zero ( Furthermore, since the control circuit 22 sends an alarm operation signal to the dosimeter 1, the dosimeter microcomputer activates the alarm (buzzer) based on the signal.
18 (see circle in Figure 2). alarm 18
If it operates normally, a signal to that effect is sent to checker 2, so the checker displays the usable indicator 2.
4 indicates that the dosimeter is in good condition (see ○ in Figure 2), and completes a series of checks (see ○ in Figure 2).

As described above, according to the present invention, a radiation dosimeter is equipped with a microcomputer and a data transmitting/receiving section, which is connected to a checker to start the microcomputer's check program and cause the microcomputer to perform a check operation. By transmitting the resulting data to the checker for checking, it is possible to check the circuits including the detection circuit and transmission circuit of the dosimeter and check the operation of the alarm device easily, quickly, and automatically. Therefore, it not only further improves the reliability of the radiation dosimeter, but also has the advantage of preventing the risk of exposure due to the use of a defective dosimeter.

Note that the present invention can be applied not only to the radiation dosimeter as described above, but also to general measuring instruments having similar functions and configurations.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of this invention.
FIG. 2 is a flowchart for explaining the operation. Description of symbols, 1...Radiation dosimeter, 2...Checker, 11...ROM (read only memory), 12
...RAM (Random Access Memory), 13...
cpu (arithmetic control unit), 14...I/O (input/output device), 15, 21...data transmitter/receiver, 16...
Checker insertion switch, 17...detection section, 18...
...Alarm, 22...Checker control circuit,
23... Abnormality indicator, 24... Usable indicator, 2
5...Microradiation source, 26...Magnet.

Claims (1)

[Claims] 1. The function of the dosimeter is checked by electromagnetically or optically coupling a radiation dosimeter that measures radiation dose and issues an alarm when the measured value exceeds a predetermined set value to the checker. A method for checking the functionality of a radiation dosimeter, wherein when it is confirmed that the dosimeter is electromagnetically or optically coupled to a checker, the dosimeter measures the radiation dose from a minute radiation source in the checker. The measured value is sent to the checker, and the checker checks the measurement function of the dosimeter by comparing the measured value with a predetermined value, and if the result is abnormal, displays or issues an alarm to that effect. When normal, the previous dose measurement value is reset, and
1. A method for checking the function of a radiation dosimeter, which comprises transmitting a predetermined signal for activating an alarm in the dosimeter to cause the dosimeter to check whether the alarm is activated.