JPS6042674A - Radiation dosimeter - Google Patents

Abstract

PURPOSE:To set a warning accurately and easily by performing the warning setting either internally not externally. CONSTITUTION:A warning set value set with an internal warning set switch 13 is stored in an RAM17 through an I/O14 and CPU15. An external warning setter 2 sends out a digital signal set with a switch 21 through a transmitter 22, and the digital signal is supplied to the receiver 12 of a dosimeter 1 coupled electromagnetically or optically with the transmitter 2 and stored in the RAM17 through I/O14 and CPU15. Thus, warning setting is performed easily without opening the case of the dosimeter and wide range setting is possible (provided that the setting range of only the internal setting is limited because there are limits of the number of set switches and circuit constitution).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for measuring radiation intensity or radiation dose (generally represents an integrated radiation dose, and the unit is R (roentgen) or mR (milliroentgen)). The present invention also relates to a portable radiation dosimeter that issues an alarm in the event of exposure to more than a prescribed amount of radiation and collects measurement data to facilitate radiation management. Generally, in this type of radiation dosimeter, it is desirable that alarm settings suitable for radiation management can be made easily and without errors.

Conventionally, such radiation iIj! The 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 cumbersome that the dosimeter case must be removed to make settings.

On the other hand, if the switch is located externally, alarm settings are easy, but there is a risk that the person carrying and using the device may change the settings without permission, which poses a problem in that radiation management cannot be performed accurately. For this reason, in an environment where a large number of unspecified persons use the system, the former method is exclusively adopted, but in this case, as described 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.

Its features include the ability to set the radiation dosimeter's alarms either internally or externally, and the ability to set external settings even when no internal settings have been made (internal settings are zero). It is in the point that I made it.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the implementation side of the present invention, and FIG. 2 is a 70-chart for explaining the alarm setting operation in FIG. In FIG. 1, 1 is a radiation dosimeter, 2 is an external alarm setting device, and the radiation dosimeter 1 includes an integrating circuit 11, an external alarm setting receiver 12, an internal alarm setting switch 13, an alarm output circuit 18, an alarm device 19, and l10 (input/output device) 14, CPU (arithmetic control unit) 15, ROM (read only memory), RAM (random access memory)
17, etc., and the external alarm setting device 2 is composed of a switch 21, a transmitter 22, etc.

The radiation S 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 fetched into the CPU via 11014 at regular intervals, and stored in the RAM 17 after predetermined calculations. 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 l101.
4° is stored in the R and AM 17 via the CPU 15. Further, from the external alarm setting device 2, a digital signal set by a switch 21 similar to the switch 13 is sent to the transmitter 2.
2, and is given to the receiver 12 of the dosimeter 1, which is electromagnetically or optically coupled to the transmitter 22, so that the signal is also sent to the R, R,
It is stored in AM17. 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 in FIG.

First, determine whether the internal alarm setting is zero (■)
. If the result is zero, the alarm setting is switched to external based on the command from the ROM (O), and after importing the alarm setting value from the receiver (θ), the setting value is stored in the RAM (○ ). On the other hand, as a result of the determination in (2), if the alarm setting is internal, the alarm setting is switched to internal based on the command from the ROM, and after importing the alarm setting value from the internal setting switch ( θ), and stores the set value in RAM (O).

In other words, alarm settings can normally be made appropriately using an internal setting device, and when no settings are made in the internal setting device (when the set value is zero),
Settings can be made from an external setting device based on instructions from the ROM. The alarm set value set in this way is compared with the measured value given through the integration circuit contest, and as a result, if the measured value exceeds the alarm set value, an alarm is issued via the alarm output circuit 18. device 195- is activated and an alarm is issued.

As described above, according to the present invention, alarm settings for a radiation dosimeter can be easily set from either the setting switch inside the dosimeter or the external setting device without opening the case of the dosimeter. This has seven advantages: it is possible to set a wide range of settings (with only internal settings, the setting range is limited due to limitations such as the number of setting switches to be used, one circuit, etc.). Further, settings can be made using a magnetic card and a computer, and furthermore, if the settings are automatically performed, it can be expected that manual setting errors can be eliminated.

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 the present invention, Fig. 2 is a 7cF diagram for explaining the alarm setting operation in Fig. #I1.
-It is a chart. 6- Code explanation 1...Radial ridge liner, 2...External report setting device, 11...Integrator circuit, 12...
External alarm setting receiver, 13...Internal change information setting device, 14...■10 (input/output device), 15...
...CPU (arithmetic control unit), 16...RO
M (read only memory), 17...RAM (
Random access memory), 18... Alarm output circuit, 19... Blinker, 21... External alarm setting switch, 22... External alarm setting transmission Representative Patent Attorney Akio Namiki Representative Patent Attorney Kiyoshi Matsuzaki 7- Figure 1 Figure 2

Claims (1)

[Claims] 1) A radiation dosimeter that measures a radiation dose and issues an alarm when the measured amount is equal to or higher than a predetermined value, comprising an internal setting means for setting an alarm inside the dosimeter, and an alarm provided from the outside. 1. A radiation dosimeter comprising: external setting means for receiving a predetermined signal and setting an alarm. 2. Radiation dosimeter according to claim 1 [wherein the radiation dosimeter in which the alarm setting from the outside is enabled only when no alarm setting is made in the internal setting means in the positioning needle] .