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Method, device and system for open-loop measurement of radon exhalation rate by electrostatic collection method without flowmeter

An electrostatic collection method and radon precipitation rate technology, applied in the field of nuclear radiation detection, can solve problems such as complex calculations, complex formulas, and expensive high-precision electronic flowmeters, and achieve the effects of simplified calculation formulas, accurate results, and low equipment cost

Active Publication Date: 2022-03-18
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional open-loop method of measuring the radon exhalation rate requires a flowmeter to measure the flow rate of the pump, resulting in many variables to be considered, and the calculation formula is also complicated, and the general high-precision electronic flowmeter is relatively expensive. It is unbearable for many laboratories and companies
[0003] In this field, a flowmeter is required for the detection of the exhalation rate of radon, and there are many environments that need to be considered, resulting in more complicated calculations. The patent document with the application number 201810487714.8 discloses an open-loop measurement The method and device for the radon exhalation rate of the emanating medium require the use of flowmeters for environmental control to be able to perform corresponding accurate measurements. It is also a common solution in this field. Calculation accuracy adjustment of radon exhalation rate

Method used

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  • Method, device and system for open-loop measurement of radon exhalation rate by electrostatic collection method without flowmeter
  • Method, device and system for open-loop measurement of radon exhalation rate by electrostatic collection method without flowmeter
  • Method, device and system for open-loop measurement of radon exhalation rate by electrostatic collection method without flowmeter

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Embodiment 1

[0051] Please focus on figure 1 , the present invention provides the method for open-loop measurement of radon exhalation rate by electrostatic collection method without flow meter, comprising steps:

[0052] S1, pre-processing:

[0053] The radon-collecting hood is buckled on the medium to be measured, and the outside air enters from the air inlet of the radon-collecting hood and mixes with the air in the radon-collecting hood;

[0054] S2. Measurement:

[0055] Use the electrostatic collection radon meter to measure the radon concentration, obtain the measured values ​​multiple times, and generate a series of measured values ​​according to the time sequence;

[0056] S3. Calculate:

[0057] The series of measured values ​​was fitted using the formula of the no-flow parameter electrostatic collection method to obtain the radon exhalation rate.

[0058]Specifically, the open-loop method for measuring the radon exhalation rate by the electrostatic collection method without ...

Embodiment 2

[0089] The application also provides a radon exhalation rate measuring device, said device adopts the method described in claim 1 to measure radon exhalation rate, said measuring device is composed of a radon collecting cover 1, a pump 2, an electrostatic collection radon measuring instrument 3 and a drying tube 4, the air outlet joint 11 of the radon collecting hood 1 is connected to the air inlet 12 of the pump through the drying pipe 4, and the air outlet of the pump 2 is connected to the electrostatic collection method radon measuring instrument 3 through a pipeline air inlet connection.

[0090] The open radon collecting hood 1 is a rectangular container with an open bottom, the top plate of the opening radon collecting hood 1 is provided with an air inlet joint, and the side plate is provided with an air outlet joint.

[0091] The bottom area S of the radon collecting hood is 0.049m 2 , the volume V is 0.00365m 3 Buckle it on the radon exhalation rate standard device, ...

Embodiment 3

[0096] The present application also provides a radon exhalation rate measurement system (not shown), comprising: a measurement module, a calculation module connected to the measurement module;

[0097] The measurement module, including the measurement device, is used to generate and output the series of measured values ​​according to the measurement of radon concentration;

[0098] The calculation module is used to perform data fitting according to the measured value series, and calculate the radon exhalation rate and the proportional constant.

[0099] As a preferred solution, the measurement module further includes a judging unit configured to judge whether the sequence of measured values ​​converges. Specifically, the convergence is the tending to a constant value.

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Abstract

The invention relates to nuclear radiation detection technology, in particular to a method, device and system for open-loop radon exhalation rate measurement by electrostatic collection without flowmeter. The method for open-loop measurement of radon exhalation rate by the electrostatic collection method without flowmeter, including steps: S1, pretreatment; S2, measurement: use the electrostatic collection method radon measuring instrument to measure the radon concentration, obtain the measured values ​​multiple times, and generate measurements according to the time sequence Sequence of values; S3. Calculation: the sequence of measured values ​​is fitted using the formula of the no-flow parameter electrostatic collection method to obtain the exhalation rate of radon. Compared with the traditional open-loop method for measuring the radon exhalation rate, the open-loop method, device and system for measuring radon exhalation rate by the electrostatic collection method without flowmeter provided by the present invention, after removing the flowmeter and performing flow rate measurement, by collecting The radon hood collects indoor radon concentration rising curve data for analysis, reduces reference variables and simplifies calculation formulas, and the results are accurate, and the equipment cost is low, which is a great progress in this field.

Description

technical field [0001] The invention relates to nuclear radiation detection technology, in particular to a method, device and system for open-loop radon exhalation rate measurement by electrostatic collection without flowmeter. Background technique [0002] Radon in the air environment mainly comes from the precipitation on the surface of the medium. The main methods for measuring the precipitation rate of radon on the surface of the medium include the accumulation method, the open-loop method, and the activated carbon adsorption method. The activated carbon adsorption method is to use activated carbon to adsorb the precipitated radon, and obtain the radon precipitation rate by measuring the γ spectrum generated by the decay of radon adsorbed in the activated carbon. This method takes a long time to measure and is not easy to automate; the accumulation method is mainly used for measuring The average radon exhalation rate over a period of time has important statistical signif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 袁红志谭延亮谢宇希范钟凯
Owner HENGYANG NORMAL UNIV
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