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Method, device and system for rapid open-loop measurement of radon exhalation rate without flowmeter

A radon exhalation rate and no-flow technology, applied in the field of nuclear radiation detection, can solve the problems of expensive high-precision electronic flowmeters and complex calculations, and achieve the effect of reducing reference variables and accurate results

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

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Problems solved by technology

High-precision electronic flowmeters are more expensive
[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 rapid open-loop measurement of radon exhalation rate without flowmeter
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  • Method, device and system for rapid open-loop measurement of radon exhalation rate without flowmeter

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Embodiment 1

[0043] Please focus on figure 1 , the present invention provides the method for rapid open-loop measurement of radon exhalation rate without flow meter, comprising steps:

[0044] S1, pre-processing:

[0045] The radon-collecting hood is buckled on the medium to be measured, and outside air enters from the air inlet of the radon-collecting hood and mixes with the air in the radon-collecting hood; specifically, the medium to be measured is a substance containing radon;

[0046] S2. Measurement:

[0047] Use a measuring instrument to measure the radon concentration, obtain the measured values ​​multiple times, and generate a series of measured values ​​according to the time sequence; specifically, the time points at which the measured values ​​are obtained multiple times should be recorded, so that the specific interval between each measured value is the same. Or different all can be listed in the series of measured values;

[0048] S3. Calculate:

[0049] The data series of...

Embodiment 2

[0074] The present invention also provides a device for measuring radon exhalation rate, comprising a radon collecting hood, a pump, and a radon measuring instrument, the gas outlet joint of the radon collecting hood is connected with the air inlet of the pump, and the gas outlet of the pump passes through a pipeline It is connected with the air inlet of the radon meter.

[0075] The open radon collecting hood is a rectangular container with an open bottom, and the opening radon collecting hood is provided with an air inlet joint and an air outlet joint.

[0076] The device of the present invention is simple, easy to apply, the calculation formula of using this device is comparatively simple equally, uses the method for measuring radon exhalation rate of the fast open-loop measurement without flow meter to work, the calculation is fast, the device is convenient, and the calculation accuracy is relatively high. Great progress.

Embodiment 3

[0078] The present invention provides a radon exhalation rate measurement system (not shown), including a measurement module and a calculation module;

[0079] The measurement module, including the device for measuring the radon exhalation rate, is used to measure the radon concentration, generate and output the series of measured values;

[0080] 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.

[0081] As a preferred solution, in this embodiment, the measurement module further includes a judging unit, and the judging unit is configured to judge whether the sequence of measured values ​​converges. Specifically, the convergence means that the above-mentioned embodiment tends to a constant value.

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Abstract

The invention relates to a method, a device and a system for rapidly open-loop measuring the exhalation rate of radon without a flow meter. The method for fast open-loop measurement of radon exhalation rate without a flow meter comprises steps: S1, pre-processing: the radon collecting hood is buckled on the medium to be measured, and the outside air enters from the radon collecting hood air inlet and is connected with the radon collecting hood Air mixing in the interior; S2, measurement: use a measuring instrument to measure the radon concentration, obtain measured values ​​multiple times, and generate a sequence of measured values ​​according to time sequence; S3, calculate: use the sequence of measured values ​​to perform data fitting using the no-flow parameter formula, Get the radon exhalation rate. The method, device and system for rapid open-loop measurement of radon exhalation rate without a flow meter provided by the present invention, through analyzing the radon concentration rising curve data in the radon collecting hood collection room, the reference variables and simplified calculation formulas are reduced, and the results are accurate .

Description

technical field [0001] The invention relates to nuclear radiation detection technology, in particular to a method, a device and a system for rapidly open-loop measuring radon exhalation rate without a flow meter. 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 significance and refe...

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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