Standard radon chamber 222Rn concentration automatic constant value measuring system and method

Abstract

The invention discloses a standard radon chamber 222Rn concentration automatic constant value measuring system and a method, and relates to the technical field of metering devices. The standard radon chamber 222Rn concentration automatic constant value measuring system comprises a spherical scintillation chamber, a radon and thorium analyzer, a radon concentration automatic constant value calibrator and a PC. The radon concentration automatic constant value calibrator comprises a high-voltage power supply, a low-voltage power supply, a signal amplifier, a single-channel pulse amplitude analyzer and an FPGA signal measuring and processing module. And the PC comprises a self-checking module, a background measurement module, a sample measurement module, a data storage module and a display. A standard radon chamber 222Rn concentration automatic valuing method is applied to the standard radon chamber 222Rn concentration automatic constant value measuring system and comprises the following steps: 1, self-checking a counting function of an FPGA signal measurement processing module; 2, measuring a background counting rate; and 3, measuring the concentration of 222Rn. According to the invention, automatic valuing of the 222Rn concentration of the standard radon chamber can be realized, so that the calibration process of the radon concentration measuring instrument is simpler, more convenient and more intelligent.

Description

technical field [0001] The invention relates to the technical field of metering devices, in particular to a standard radon chamber 222 Rn concentration automatic fixed value measurement system and method. Background technique [0002] The standard radon chamber is a standard device used for value transfer and experimental research. It is mainly used in the verification, calibration and testing of radon concentration measuring instruments. It is also widely used in radiation protection, radioactive environmental protection, radon prospecting, earthquake prediction and other fields. Great application value. Accurately measure radon in standard radon chambers 222 Rn concentration ( 222 Rn concentration fixed value) is of great significance to the verification, calibration and testing of radon concentration measuring instruments, and the standard radon chamber 222 Rn concentration automatic setting method for air 222 Accurate measurement of Rn concentration has important re...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a kind of standard radon chamber 222 Rn concentration automatic fixed value measuring system and method, it solves the problem that is currently used in standard radon chambers 222 The scintillation chamber method for Rn concentration determination has a low degree of automation and has not been unattended. 222 The Rn concentration needs to be calculated manually, and the data cannot be stored automatically

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