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

Abstract

The invention discloses a standard radon chamber 222Rn daughter concentration automatic fixed value measuring system and method, and relates to the technical field of metering devices. A standard radon chamber 222Rn daughter concentration automatic constant value measuring system comprises a gas sampling device, a low background alpha scintillation probe, a radon daughter concentration automatic constant value calibrator and a PC. The radon daughter 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. The standard radon chamber 222Rn daughter concentration automatic valuing method is applied to the standard radon chamber 222Rn daughter concentration automatic valuing measurement system, and comprises the following steps: 1, self-checking a counting function of the FPGA signal measurement processing module; 2, measuring a background counting rate; and 3, measuring the concentration of 222Rn daughters. According to the invention, automatic valuing of the radon daughter concentration of the standard radon chamber can be realized, so that the calibration process of the radon daughter 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 daughter body 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 Daughter Concentration Verification, Calibration and Testing 222 The Rn daughter body concentration measuring instrument is of great significance, and the standard radon chamber 222 The method of automatic determination of Rn daughter concentration in the air 222 The accurate measurement of Rn pro...

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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 daughter body concentration automatic fixed value measurement system and method, it solves the problem that is currently used in standard radon chambers 222 Counting methods such as the three-stage method, five-stage method, and total α counting method for the determination of the concentration of Rn daughters are relatively low in automation, unattended, and unattended. 222 The Rn concentration needs to be calculated manually, and the data cannot be stored automatically

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