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Small window surface pollution detector

A surface contamination and detector technology, applied in the field of detectors, can solve problems such as deviation, non-detection, and small measurement values ​​of surface contamination instruments.

Pending Publication Date: 2020-08-28
SHANGHAI ERGONOMICS DETECTING INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. Since the calculation formula of the measured surface activity concentration is related to the size of the detection window section, the measurement result is correct when the measurement pollution surface is larger than the detection window section of the instrument; small phenomenon
[0006] 2. When using a large-window cross-section instrument to measure a point-shaped contaminated surface, there is often a large deviation, or even no phenomenon detected
[0007] 3. Instruments with large window sections cannot locate point-like contaminated surfaces

Method used

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  • Small window surface pollution detector

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Embodiment 1

[0021] see figure 1 , Embodiment 1: In an embodiment of the present invention, a small window surface contamination detector includes a probe body 2, the probe body 2 is processed into an H-shaped cavity with an inner diameter of 20 mm, forming a window with a cross-sectional diameter of 20 mm and approximately A circle of 3.14 square centimeters, the left cavity wall is sprayed with zinc sulfide (ZnS) to form a zinc sulfide coating 8, the cavity port is shading treated with aluminum foil 1, and a hole is opened between the chamber and the chamber, and a 1mm*1mm square hole is opened , place the cut plastic scintillator 3 in the hole and fix it, paste the silicon photomultiplier tube 4 on the right side of the plastic scintillator and fix it with ultraviolet curing glue, fix the printed circuit board 5 in the cavity on the right side, and use the opaque end Cover 6 is light-shielding and closed and fixed.

Embodiment 2

[0022] Embodiment 2, on the basis of Embodiment 1, the probe body 2 is made of aluminum alloy, which has the advantages of light weight, high hardness, corrosion resistance, etc., and can increase the service life of the product.

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Abstract

The invention discloses a small window surface pollution detector comprising a probe body, wherein the probe body is an H-shaped cavity; a left side cavity port is subjected to aluminum foil shading treatment; a hole is formed between the left side cavity and a right side cavity; a plastic scintillator is fixed in the hole, a printed circuit board is fixed in the right side cavity, a silicon photomultiplier is attached to the right side of the plastic scintillator, an end cover is arranged at the port of the right side cavity, and the silicon photomultiplier is connected with a printed circuitboard through a wire. The problem that a large-window section detector is unable to correctly measure the point radioactive contamination object is solved. The point-shaped radioactive contaminationis positioned, so that the problem that an existing large-window section instrument cannot measure and position point-shaped and irregular radioactive contamination surfaces is solved.

Description

technical field [0001] The invention relates to the technical field of detectors, in particular to a small window surface contamination detector. Background technique [0002] During the production and use of radioactive substances, the surface of the human body and other objects are often contaminated, which not only affects the health of the operator itself, but also pollutes the surrounding environment. In order to know the degree of surface pollution of objects, people invent and manufacture surface pollution instruments to measure the surface activity of polluted objects. Usually there are hand and foot surface pollution meters, portable surface pollution meters, etc. The detector cross-sections of common portable surface pollution instruments are divided into circular and square, and the detection cross-sections of instruments produced by various companies vary in size, ranging from dozens of square centimeters to hundreds of square centimeters. [0003] In the measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/203G01T1/208
CPCG01T1/203G01T1/208
Inventor 张志勇金紧根刘思平
Owner SHANGHAI ERGONOMICS DETECTING INSTR
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