Permanent magnet adsorption type nuclear emergency large-area wall pollution rapid measuring device

Abstract

The invention relates to a permanent magnet adsorption type nuclear emergency large-area wall pollution rapid measuring device which comprises a frame unit, a detector array, a connecting support connected between the frame unit and the detector array, a driving unit arranged on one side of the frame unit and a driven wheel set connected with the frame unit; the detector array is hinged to the connecting support; the detector array is folded and unfolded relative to the frame unit through the connecting support; a detector auxiliary permanent magnet is arranged on the side face of the detector array; and vehicle body permanent magnets are arranged at the bottoms of the frame unit and the driving unit. The device of the invention can stably crawl and turn on a 90-degree vertical metal wall surface, adopts the large-area array pollution detector, and has the advantages of high detection efficiency, low detection lower limit and small measurement error. The device can be applied to a nuclear emergency situation, can rapidly carry out pollution measurement on a large-area metal wall surface in an area where personnel cannot reach easily, renders pollution distribution, and provides basis for making a protection action strategy of emergency response personnel.

Description

technical field [0001] The invention relates to the field of nuclear emergency radiation protection, in particular to a permanent magnet adsorption type nuclear emergency large-area wall pollution rapid measurement device. Background technique [0002] In the radiation measurement of nuclear emergency, the traditional metal wall pollution measurement is usually done by manual operation. This method has the following defects: (1) The operator has the risk of contamination. Because there is a large area of ​​radioactive pollution on the measured wall, personnel may be contaminated with radioactive substances when they touch the wall, and there may be internal exposure hazards caused by inhalation of radioactive substances, and there may also be a certain degree of external exposure hazards; (2) There are operational safety risks. In the case of high walls, there are potential safety hazards for operators working at heights for a long time; (3) The measurement efficiency is low...

AI Technical Summary

Problems solved by technology

[0002] In nuclear emergency radiation measurement, the traditional metal wall pollution measurement is usually done manually, which has the following defects: (1) The operator has the risk of contamination

Because there is a large area of ​​radioactive pollution on the measured wall, personnel may be contaminated with radioactive substances when they touch the wall, and there may be internal exposure hazards caused by inhalation of radioactive substances, and may also be subject to a certain degree of external exposure hazards; (2) There are operational safety risks

In the case of high walls, there are potential safety hazards for operators working at heights for a long time; (3) The measurement efficiency is low. In addition, the effective measurement area of ​​the manual measurement detector is small; (4) It is difficult to draw the pollution distribution map of the whole wall surface, and some areas cannot be reached by personnel

[0003] Due to the existence of areas that are difficult for people to reach, it is difficult to measure the pollution of metal walls. In order to determine the distribution and degree of pollution and provide a basis for the formulation of protective measures, it is necessary to establish long-distance pollution measurement methods. At present, some long-distance pollution The measuring device mainly adopts a mobile trolley structure. The mobile trolley structure carries a permanent magnetic adsorption unit and a nuclear radiation detector. The permanent magnetic adsorption unit is used to adsorb the metal wall to be measured. The nuclear radiation detector carries out pollution measurement along with the mobile trolley structure, but , in the actual use process, there are the following defects: 1. The permanent magnet adsorption unit on the structure of the traditional mobile trolley is divided into a flat type and a crawler type. The crawler type needs to install the magnet on the mobile device, and the contact of the magnet with the wall may easily cause the wall to be scratched. , the magnet is also easily damaged, the flat plate magnet is large, and the utilization rate of magnetic energy is low; 2. The detection range of the nuclear radiation detector is small, which greatly reduces the detection efficiency

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