JP2000075033A - Radiation measuring device and system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To illuminate a display part when using a radiation-measuring device at a dark area. SOLUTION: A survey meter 8 is composed of a body 10 and a detector 12, and the body 10 is provided with a display part 14 where a light accumulation layer 100 is coated. When the survey meter 8 is used at a dark area such as a machine room, the light accumulation layer 100 operates to illuminate the display part 14, thus allowing the display part 14 to emit light naturally without providing a light source or the like. When the survey meter 8 is accommodated in a storage, light is allowed to enter the storage from the outside or a light source is provided in the storage, thus fully applying light to the light accumulation 1 layer 100 when the survey meter 8 is not in use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radiation measuring apparatus and system, and more particularly to illumination of a display unit in a dark place.

[0002]

2. Description of the Related Art As a portable radiation measuring device, for example, a survey meter can be cited. The survey meter is used, for example, when measuring a dose in a facility of a nuclear power plant. The survey meter is
Because of its portability, it is usually used even in places where people do not enter or leave, such as a machine room. It is also used when measuring radiation dose inside various facilities.

[0003] Among such measuring places, there are many places with insufficient lighting. For this reason, it is conceivable to incorporate a small illumination or the like into the display unit, but in that case, there is a problem that the battery is consumed quickly.

[0004] For example, a fluorescent layer for night identification as seen in a watch contains a small amount of radioactive material together with a fluorescent substance. If such a fluorescent layer is provided on a display unit of a radiation measuring apparatus, the radioactive There is a problem that radiation emitted from a substance adversely affects radiation measurement results.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a radiation measuring apparatus that does not consume a battery and does not adversely affect a measurement result, so that a display unit can be easily viewed in a dark place. It is to become.

[0006]

In order to achieve the above object, the present invention provides a portable radiation measuring apparatus including a measuring unit for measuring radiation, and a display unit for displaying the measurement result. A luminous layer having a luminous action is formed on at least a part of the display section.

According to the above structure, since the light storage layer is formed on the display unit, when the radiation measuring apparatus is used in a dark place such as a machine room, light is emitted from the light storage layer to illuminate the display unit. It is possible to do. Therefore, a light emitting member for the illumination and electric power for the light emitting member are not required. It is desirable that the light storage layer is formed substantially on the entire surface of the display unit, and according to the configuration, the brightness of the display unit can be improved when used in a dark place.

[0008] It may be possible to illuminate the display unit in a dark place by applying a fluorescent material to which a radioactive substance or the like is added. Such materials are unsuitable because they can give It is desirable to use a luminous material that does not generate radiation, has high luminous efficiency, and can secure a long luminous time.

Further, in order to achieve the above object, the present invention provides a radiation measuring system having a portable radiation measuring device and a storage for storing the radiation measuring device when the radiation measuring device is not used. The radiation measurement device includes a measurement unit that measures radiation, and a luminous layer having a luminous action formed at least in part, and a display unit that displays a measurement result. It has a window that can be taken in.

[0010] According to the above configuration, in a nuclear power plant or the like, the storage is usually provided near the entrance of the radiation control area, and there is always illumination near the entrance. Therefore, such external light is positively introduced into the storage, and the light is accumulated in the luminous layer. According to such a configuration, light can be stored during storage. Therefore, even when the radiation measuring device is taken out and used immediately in a dark place, the illuminating effect of the light storing layer can be sufficiently exerted.

According to another aspect of the present invention, there is provided a radiation measuring system including a portable radiation measuring device and a storage for storing the radiation measuring device when the radiation measuring device is not in use. The radiation measurement apparatus includes a measurement unit for measuring radiation, and a display unit on which a luminous layer having a luminous action is formed at least in part and displaying a measurement result, wherein the storage unit is provided with a radiation measurement unit. A light source for irradiating the display unit with light when the device is accommodated is provided.

According to the above configuration, light can be positively stored in the luminous layer during storage of the radiation measuring apparatus.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a preferred embodiment of the radiation measuring apparatus according to the present invention. This radiation measuring device is a survey meter used in a radiation handling facility such as a nuclear power plant.

Referring to FIG. 1, a survey meter 8 includes a main body 10 and a detector 12. The detector 12 is
It is connected to the main body 10 by a cable, and its detector 12 detects radiation. This detector 1
Reference numeral 2 denotes, for example, a GM tube, or a combination of a scintillator and a photomultiplier tube.

The main body 10 includes a circuit for processing an output signal from the detector 12 and a circuit for calculating a dose or the like.
The radiation measurement result is displayed on a display unit 14 provided in the main body 10. As shown in FIG. 1, the display unit 14 is an analog meter. A battery is built in the main body 10, and the main body 10 and the detector 12 are driven using the battery as a power source. FIG. 1 shows a state in which the detector 12 is detachably attached to a handle portion of the main body 10. In the actual measurement, the detector 12 is detached from the main body 10, and the detector 12 is moved closer to a desired part, whereby radiation from the part is detected.

In the present embodiment, the display section 14 has a light storage layer 100 formed substantially entirely. The layer is formed by applying or coating a luminous material to the inner surface of the display unit 14. Here, the phosphorescent material is a material having a function of accumulating light and emitting the accumulated light in a dark place. Various types of such phosphorescent materials have been conventionally provided. For example, it is preferable to use Chemtech Co., Ltd. (Chemtech Picarico (trade name)).

Incidentally, it is possible to use a fluorescent material using a radioactive substance instead of the phosphorescent material. In this case, however, the radiation from the radioactive substance adversely affects the original measurement function of the survey meter 8 as described above. So that
Such materials are not desirable. Therefore, it is desirable to use a luminous material that does not exert such an adverse effect, that is, a luminous material.

The above-mentioned phosphorescent material has a light emission time of several hours to several tens of hours, for example.
In the use environment, the lighting effect can be sufficiently exhibited.

FIG. 2 shows a storage 30 used in the radiation measurement system according to the present invention. A plurality of shelves are formed in the storage 30, and a used survey meter 8 is placed on each of the shelves. That is, the survey meter 8 is stored in the storage 30 when the survey meter 8 is not used.

In the system according to the present embodiment, the storage 3
Light intake aperture 102 capable of capturing at least external light at zero
Are formed. For example, in the case where a door is formed in the storage 30, a window made of a transparent member is attached to the door, or when such a door is not formed, an external environment is provided at least between the shelves. The front surface of the storage 30 is released so that light is taken in. Alternatively, the lighting device 104 may be positively provided on the upper part of each shelf.

According to the above-described configuration, when the survey meter 8 is not used, the external light or the light from the lighting device 104 can be sufficiently provided to the display unit 14 facing upward, and as a result, It becomes possible to supply necessary light to the light storage layer 100. Then, even if the survey meter 8 is taken out of the storage 30 and used immediately in a dark place, the original function of the luminous layer 100, that is, the lighting function can be immediately exhibited.

[0023]

As described above, according to the present invention,
In the radiation measurement device, the display unit can be easily viewed in a dark place without draining the battery and without adversely affecting the measurement result.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a preferred embodiment of a radiation measuring apparatus according to the present invention.

FIG. 2 is a conceptual diagram showing a storage in which a radiation measuring device (survey meter) is stored.

[Explanation of symbols]

8 Survey meter, 10 main body, 12 detector, 14
Display part, 30 storage, 100 luminous layer, 102 light intake opening, 104 lighting device.

Claims (3)

[Claims] 1. A portable radiation measuring device comprising: a measuring unit for measuring radiation; and a display unit for displaying the measurement result, wherein a light-storing layer having a light-storing action is formed on at least a part of the display unit. A radiation measuring device characterized by being performed. 2. A radiation measurement system comprising a portable radiation measurement device and a storage for storing the radiation measurement device when the radiation measurement device is not used, wherein the radiation measurement device measures radiation. A measurement unit; and a display unit on which a luminous layer having a luminous action is formed at least in part, and a display unit for displaying a measurement result, wherein the storage has a window capable of taking in external light. Measurement system. 3. A radiation measurement system having a portable radiation measurement device and a storage for storing the radiation measurement device when the radiation measurement device is not used, wherein the radiation measurement device measures radiation. A measurement unit, and a light storage layer having a light storage function is formed on at least a part thereof, and a display unit for displaying a measurement result is included. A radiation measurement system comprising a light source for irradiating light.