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Environmental radon measuring method and measuring instrument

A measuring instrument and radon gas technology, which are applied in the field of radon gas measuring methods and detection instruments, can solve the problems of low work efficiency, inconvenient portability, cumbersome instruments, etc., and achieve the improvement of measurement accuracy, lower detection limit, and small size of the instrument. Effect

Inactive Publication Date: 2005-04-20
河北航遥科技有限公司
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Problems solved by technology

[0019] The sampling method using cumulative measurement is an effective method to achieve high-accuracy measurement in an environment with a very low radon level. The disadvantage is that the work efficiency is low, and the measurement process is more troublesome.
These two types of instruments are relatively bulky, inconvenient to carry, and have low work efficiency (it takes several hours to measure two parameters at the same time)
At the same time, due to the low sensitivity of the instrument, the accuracy of measuring the balance factor at the housing radon level is not high

Method used

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  • Environmental radon measuring method and measuring instrument
  • Environmental radon measuring method and measuring instrument
  • Environmental radon measuring method and measuring instrument

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Embodiment Construction

[0052] figure 2 It is shown that the sampling part is composed of a film sampling piece 1, an electrode plate 2, a cable 3, a bracket 4, and a high-voltage power supply. The film sampling piece 1 is made of a plastic film with a thickness of about 4um, and the alpha rays can penetrate the film with little energy loss. The sampling piece 1 is set on the electrode plate 2, and the electrode plate 2 is connected with the cable 3, and the cable 3 is connected with a high-voltage power supply, and the predetermined high voltage is provided to the electrode plate 2 by the power supply.

[0053] The detector in the sample processing part is equipped with upper and lower two large-area (Φ=50mm) gold-silicon surface barrier detectors to form a bidirectional detection of the sampling piece. The distance between the two detectors is only 6mm, and the middle is a sample disk with a thickness of 3mm for placing the sampling piece. This design minimizes the energy absorption of the α-ray ...

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Abstract

An environmental radon gas measuring method and measuring instrument belong to the technical field of gas detecting methods and instruments. The technical problem to be solved is to provide a detection method and detection instrument that can quickly measure radon concentration and balance factor simultaneously, have large measurement range, wide applicability, high accuracy, and are convenient to use. Its technical solution is: the sampler is supported at the sampling position, the sampling piece composed of double-layer film is placed on the electrode plate, the electrode plate is connected to negative high voltage, the sampling piece absorbs the radon progeny in the indoor air space, and then the The sampling piece is placed in the sample tray between the upper and lower detectors in the host, and the measurement is started. The calculation software installed in the instrument automatically calculates the air radon concentration and balance factor at the sampling position. The sampling part of the tester is composed of film sampling sheet, electrode plate, cable, high voltage power supply, etc. The sample processing part is composed of detector, amplifier circuit, pulse analyzer, microprocessor, memory, decoder, latch and so on.

Description

technical field [0001] The invention relates to a method for measuring radon gas and a detection instrument, belonging to gas detection and instruments [0002] technology field. Background technique [0003] Measuring radon in the air is an important task in environmental monitoring. There are many measurement methods and different sampling methods in radon monitoring. Operators can choose according to different measurement requirements and conditions, as follows. [0004] 1. Measurement method [0005] There are various methods and instruments for measuring radon and its short-lived progeny, which can be divided into the following three categories according to the characteristics of sampling: [0006] (1) Instantaneous measurement method [0007] Collect air samples in the measured air space in a short time (or collect gas samples in soil, gas samples in water), the longest sampling time usually does not exceed 30 minutes, and the measurement results only represent the ...

Claims

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Application Information

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IPC IPC(8): G01N23/00G01T1/167G01T1/17G01T1/20
Inventor 邹礼规黄清波
Owner 河北航遥科技有限公司
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