JPH0457985B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to radiation intensity or radiation dose (generally representing integrated radiation dose, the unit of which is R (roentgen) or mR (milliroentgen).
It is. ), and issues an alarm in the event of exposure to more than a prescribed amount of radiation, as well as collecting measurement data to facilitate radiation management. Generally, in this type of radiation dosimeter, it is desirable that alarm settings suitable for radiation management be easily and without error.

Conventionally, such a radiation dosimeter has an alarm setting switch on its internal or external case, and alarm settings are performed by manually operating this switch. Therefore, if the setting device is inside the dosimeter, it is troublesome to have to remove the case of the dosimeter to set it. On the other hand, if the switch is external, it is easy to set the alarm, but there is a risk that the switch may be changed arbitrarily by the person carrying it and using it, and there is a problem that radiation control cannot be performed accurately. Therefore, in an environment where an unspecified number of people use the
The former method is exclusively adopted, but in this case, as mentioned above, there is a problem in that it takes time and effort to set the alarm.

The present invention has been made in view of the above, and an object of the present invention is to provide a radiation dosimeter in which alarm settings can be made accurately and easily.

The feature is that alarm setting means of the radiation dosimeter is provided both inside and outside the radiation dosimeter, and when no alarm setting is made in the internal alarm setting means (when the internal alarm setting is zero), an external alarm is set. The point is that alarm settings can be made in the setting means.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the alarm setting operation in FIG. In Figure 1, 1 is a radiation dosimeter, 2 is an external alarm setting device,
The radiation dosimeter 1 includes an integration circuit 11, an external alarm setting receiver 12, an internal alarm setting switch 13, an alarm output circuit 18, an alarm device 19, and an I/O (input/output device).
14, a microcomputer equipped with a CPU (arithmetic control unit) 15, a ROM (read only memory), a RAM (random access memory) 17, etc., and an external alarm setting device 2 consisting of a switch 21, a transmitter 22, etc. be done.

The radiation dosimeter 1 detects a radiation dose using a well-known radiation detector (not shown), and integrates the radiation dose generally given by a pulse signal using an integrating circuit 11. This integrated signal is sent to the I/O1 at regular intervals.
4 to the CPU, and after the predetermined calculation
It is stored in RAM17. The internal alarm setting switch 13 is composed of, for example, a digital switch, and the alarm setting value set by the switch 13 is the I/O1
4. Stored in RAM 17 via CPU 15.
Further, a digital signal set by a switch 21 similar to the switch 13 is sent from the external alarm setting device 2 via a transmitter 22.
Since the signal is given to the receiver 12 of the dosimeter 1 which is electromagnetically or optically coupled to the dosimeter 1, the signal is also stored in the RAM 17 via the I/O 14 and the CPU 15 in the same manner as above. In other words, alarm settings can be made from either the radiation dosimeter 1 or the external alarm setting device 2, but in this invention, the selection is made by the external setting device 2 only when the setting switch 13 of the dosimeter 1 is set to zero. Allows configuration. This point will be explained with reference to the flowchart of FIG.

First, it is determined whether or not the internal alarm setting is zero (○A). If the result is zero, the alarm setting is switched to external based on the command from the ROM (○○○),
The alarm setting value from the receiver is taken in (◯C), and the set value is stored in the RAM (◯D). On the other hand, if the result of the determination in ○A is that the alarm setting is from internal, the alarm setting is switched to internal based on the command from the ROM (○E), and the alarm setting value from the internal setting switch is imported. After that (◯), the set value is stored in the RAM (◯D).

In other words, alarm settings can normally be made appropriately using an internal setting device, and when no settings are made to the internal setting device (when the set value is zero), instructions from the ROM are used. Based on this, settings can be made from an external setting device. The alarm setting value set in this way is compared with the measured value given via the integrating circuit 11, and as a result, if the measured value exceeds the alarm setting value, an alarm is issued via the alarm output circuit 18. device 19 is activated and an alarm is issued.

As described above, according to the present invention, the alarm setting of the radiation dosimeter can be performed either from the setting switch inside the dosimeter or from the external setting device.
Settings can be easily made without opening the dosimeter case, and a wide range of settings can be made.
The setting range is limited due to the number of setting switches used, circuit limitations, etc. ). Furthermore, settings can be made using a magnetic card and a computer, and furthermore, if the settings are made automatically, it can be expected to have the effect of eliminating manual setting errors.

Note that this invention can be applied not only to the function of a radiation alarm meter, but also to a comprehensive personal exposure management system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of this invention.
FIG. 2 is a flowchart for explaining the alarm setting operation in FIG. 1. Description of symbols, 1...Radiation dosimeter, 2...External alarm setting device, 11...Integration circuit, 12...External alarm setting receiver, 13...Internal alarm setting device, 14...
I/O (input/output device), 15...CPU (arithmetic control unit), 16...ROM (read only memory), 1
7...RAM (random access memory), 18...
...Alarm output circuit, 19...Alarm device, 21...External alarm setting switch, 22...External alarm setting transmitter.

Claims (1)

[Scope of Claims] 1. A radiation dosimeter that measures a radiation dose and issues an alarm when the measured amount exceeds a predetermined value, comprising an internal alarm setting means provided inside the dosimeter and configured to set the alarm; A radiation dosimeter comprising external alarm setting means for setting an alarm by transmitting a predetermined signal from the dosimeter to the inside of the dosimeter. 2. The radiation dosimeter according to claim 1, wherein an external alarm setting is enabled only when no alarm is set in the internal alarm setting means.