JPH03285193A - Personal exposure dosimeter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an IC for a personal exposure dosimeter in which an IC card can be attached and detached.
The present invention relates to an installation structure that has a card attachment/detachment structure and a dosimeter on/off switch, and has a power saving effect.

[Conventional technology]

Conventional devices generally transmit information in the dosimeter to the outside through optical communication, such as the alarm meter described in External Exposure Monitoring, edited by the Japan Isotope Association, p. 75, 1986. Further, there is a known example of a dosimeter having a structure in which an IC card can be inserted and removed, as disclosed in Japanese Patent Application No. 19658/1983.

[Problem to be solved by the invention]

In the above conventional technology, when the IC card is attached to the dosimeter,
There was no part where the IC card could be clearly identified and recognized when worn by the dosimeter user himself, and there was a problem that someone else could use it by mistake. Furthermore, the IC card attachment/detachment mechanism does not take into account usability, and there are points that need to be improved in practice. Furthermore, the IC card insertion and dosimeter activation switches are provided independently, and no consideration has been given to low power consumption.

The purpose of the present invention is to
The purpose is to enable the user or a third party to clearly identify the IC cart that the user or a third party is wearing. Furthermore, the IC card attachment/detachment mechanism has an easy-to-use structure and an IC card attachment/detachment mechanism.
It is an object of the present invention to provide a dosimeter having a structure that can effectively reduce power consumption using a C card attachment/detachment mechanism.

[Means to solve the problem]

In order to achieve the above object, the present invention uses a transparent material for the outer case of the IC card mounting part so that it can be read from the outside of the dosimeter.
This allows the information written on the surface of the C card (tab information) to be easily recognized.

Furthermore, it provides a structure that can be operated with one touch as an easy-to-use IC card attachment/detachment mechanism. In addition, by linking the power switch of the dosimeter to the IC card attachment/detachment mechanism, the dosimeter is activated only when the IC card is inserted, reducing power consumption by eliminating unnecessary power-on operations. It is something.

[Effect]

The attached IC card can be easily identified from the outside by constructing the outer case of the IC card attachment part from a transparent material or by having a structure in which the surface of the IC card (tab information pasting part) is exposed to the outside.

This allows a third party to immediately identify the dosimeter user's identity. It is also possible to prevent someone else's dosimeter (dosimeter equipped with an IC card) from being misused.

The IC card can be inserted into the dosimeter with just one touch.
The process of entering and exiting the radiation control area flows smoothly, and I
The operational burden on the user of the dosimeter with C card can be reduced.

Furthermore, by putting the power switch of the dosimeter into the operating state (on state M) when the IC card is installed, it becomes unnecessary to provide a manual power switch outside the dosimeter. This can prevent the power from being cut off due to an erroneous operation.

Furthermore, since unnecessary power-on can be prevented, power consumption can be significantly reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. A photograph of an individual is attached to the dosimeter 1 with a removable IC cart 2 attached to the front surface of the IC card 2 (the back side is provided with contact terminals for communicating information with the electronic circuit inside the dosimeter).3.
It is installed so that the 4th grade personnel can access it from the outside. The IC cards mentioned here refer to all memory cards, including those with ISO standard specifications and RAM cards that do not have a computer installed. Figure 2 shows the configuration of this dosimeter.

Measurement pulses of personal exposure measured by the radiation detector 5 are integrated by a single-chip computer 7 via an amplifier 6. An IC card 2 is connected to the computer 7 via a contact terminal, so that the user's personal information recorded in the IC card 2 can be managed instantly. For example, the user's past radiation exposure is recorded, and it is evaluated whether the result of integrating the current radiation exposure exceeds the radiation exposure control value. If the control value is exceeded, a buzzer 8 generates an alarm. Moreover, the IC card 2 can be attached and detached, and when leaving the radiation control area, the IC card 2 is attached and detached from the dosimeter and only the IC card 9 is replaced. Naturally, the radiation dose data within the controlled area at that time is recorded in the IC cart 9. The other main components of the dosimeter are the display section 10 that displays the current exposure dose value and management value. Panteri 11 and its Panteri Chiekka 1
2. Interface 13 with the entrance/exit gate of the controlled area
Consists of.

Figure 3 shows the flow of the exposure control system using this dosimeter: general area (uncontrolled area), protected area (area that is not a radiation controlled area but whose access is controlled), and controlled area (radiation controlled area). Areas that require exposure control using dosimeters).

In the general area, the photo attached to the IC card and the affiliation (1, D)
, tag information) to the guard and enter the protected area.

In the protected area, attach the IC cart to the dosimeter and enter the controlled area. Although not shown, there may be a guard at the entrance gate to the controlled area or inside the controlled area, and identification of the person may be required. In order to cope with such a case, the present invention makes it possible to easily present the tag information of the IC card even when the IC card is attached to the dosimeter.

A structure that allows the IC card 2 tab information to be identified from the outside of the dosimeter 1 can be easily achieved by simply providing a transparent material in a part of the dosimeter case. According to this embodiment, entry and exit processing can be performed smoothly, and practical radiation exposure management using this dosimeter is possible.

FIG. 4 shows an embodiment of an IC card attachment/detachment mechanism.

The IC card 2 is installed in the storage part 20, and the upper case 22 made of transparent material, which is pushed up by the spring 21, is pressed in the direction of the arrow 23 and fixed with the stopper 24. IC
When attaching or detaching the card 2, move the stopper 24 in the direction of arrow 25, so that the upper case 22 is attached to the spring 21.
is pushed up by the force of

A microswitch 26 is provided in the storage section 20 of the IC card 2 mounting mechanism, and turns on the operating power of the dosimeter when the IC card 2 is mounted. Therefore, with this structure, the power switch is turned on immediately before the dosimeter starts to be used, which is highly effective in saving power consumption. Furthermore, with this structure, there is no need to provide an operating power switch outside the dosimeter, and it is possible to prevent accidents in which the power is cut off due to erroneous operation.

The operating power supply 26 of the dosimeter 1 is turned on when the IC card 2 is installed, but no measurement operation is performed yet. The measurement operation of the dosimeter 1 begins when the dosimeter is inserted into the entrance gate of the controlled area, and when it is determined that entry is permitted, the dosimeter 1 is removed and the person enters the area (see Figure 3).

Similarly, when retreating, the dosimeter 1 is inserted into the retreat gate and the measurement operation is stopped when the dosimeter 1 is withdrawn. Providing a mechanism for locking the storage stopper 24 of the IC card 2 inside the dosimeter at the same time as the start of this measurement operation has the effect of preventing erroneous operation of removing the IC cart 2 within the controlled area.

If the IC card 2 is removed during the measurement operation of the dosimeter 1, the exposure information will be incompletely recorded, resulting in a serious management problem.

From this, a single function produces a great practical effect.

Similarly, when exiting the area, the IC card storage stopper 24 of the dosimeter is automatically unlocked when passing through the exit gate.

FIG. 5 shows a modification of the IC card attachment/detachment mechanism. IC
The card 2 is mounted in a sliding manner, and a microsinch 26 is provided at the tip of the storage part. To take out the IC card 2, move the chute 27 in the direction of the arrow to eject a part of the IC card 2 to the outside of the dosimeter 1. After that, the IC card 2 is manually removed.

FIG. 6 shows another modification of the IC card loading/unloading mechanism.
A guide 28 into which the C card 2 is inserted is provided outside the dosimeter 1, and the IC cart 2 is taken in and out along the guide 27. There is nothing inside the guide 28, and the IC card 2 can be easily inserted and removed only by manual operation. This modification can provide a simple IC card attachment/detachment mechanism without any mechanical parts such as stoppers, springs, or shooters. Furthermore, in this modification, the surface of the IC card 2 is exposed to the outside of the dosimeter 1, so that the IC cart can be easily identified from the outside.

〔Effect of the invention〕

According to the present invention, the items written on the surface of the IC cart can be easily recognized from the outside while the IC card is mounted on the dosimeter. This means that a third party can easily determine that the personal identification of the dosimeter user and the IC card are the same, making it possible to ensure thorough checks both inside and outside of various controlled areas. Furthermore, since it is possible to provide a simple mechanism for attaching and detaching an IC card to and from the dosimeter, a practical radiation management system using this dosimeter can be realized. Furthermore, since the operating power of the dosimeter can be turned on and off in conjunction with the attachment and detachment of the IC card, power consumption can be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a block diagram of this dosimeter, Fig. 3 is a processing flow diagram of an exposure management system using this dosimeter, and Fig. 4 is an IC card attachment/detachment. A perspective view of the mechanism, FIGS. 5 and 6 are perspective views of a modification of the IC card attachment/detachment mechanism. 1...Dosimeter, 2...IC card, 3...Photo,
4... Affiliation, 4... Radiation detector, 6... Amplifier, 7... Single chip computer, 8... Buzzer, 9... IC card, 10... Display unit, 11...・
・Battery, 12...Battery checker, 13...
Interface, 2゜...IC card storage section, 21
...Spring, 22...Upper case, 23...Arrow, 24...Stopper, 25...Arrow, 26...
Micro switch, 27...shooter, prisoner number 4 cell number Otsu

Claims (1)

[Claims] 1. In a personal exposure dosimeter comprising a radiation detector, a single-chip computer, and a removable storage medium, a part of the storage medium is provided with a certificate of ownership of the storage medium, and the A personal exposure dosimeter characterized by having a structure in which the above-mentioned items can be visually viewed from the outside with a storage medium attached. 2. The personal exposure dosimeter according to claim 1, further comprising a switch linked to the attachment/detachment of the storage medium, which switches the main power source in response to the attachment/detachment of the storage medium. 3. The personal exposure dosimeter according to claim 1, further comprising a mechanism for interlocking the locking and releasing operations of the stopper for storing and fixing the removable storage medium with the measurement start and stop operations of the dosimeter. 4. The personal exposure dosimeter according to claim 1, wherein a guide is provided along the installation of the storage medium, and when the storage medium is installed, the information written on the surface of the storage medium is exposed outside the dosimeter.