Simulation detection method for alpha surface contamination

Abstract

The invention relates to a simulation detection method for alpha surface contamination based on simulation source measurement and geomagnetic field measurement. The simulation detection method comprises the steps of setting an alarm threshold; collecting a simulation source contaminated on the surface of a person or an object through a sensor array, wherein the sensor array comprises a simulationsource measurement sensor array and a geomagnetic field measurement sensor, each sensor outputs one by one through an analog switch switching circuit; transmitting the output of the analog switch switching unit to an amplifying and filtering unit; adjusting an amplification factor control circuit through a single-chip microcomputer control unit to determine the amplification factor of a second-stage amplifying and filtering circuit, and processing the amplified and filtered signals through an A / D acquisition unit in the single-chip microcomputer control unit, and converting the signals into digital signals capable of being processed by a single-chip microcomputer; and subtracting the measurement result of the geomagnetic field sensor from the measurement result of the simulation source sensor to obtain a final measurement result.

Description

technical field [0001] The invention relates to the technical field of radioactive pollution detection, in particular to an alpha pollution simulation detection method. Background technique [0002] Alpha surface pollution is a kind of radioactive pollution, which refers to the contamination of the surface of people or objects with radionuclides that can release alpha particles. In nuclear emergency medical rescue, when a pollution accident occurs, it is necessary to detect people and objects entering and leaving the contaminated area; when personnel are contaminated, they need to be decontaminated, and testing is required before and after each decontamination to evaluate the decontamination effect. [0003] In the α surface pollution simulation, a simulation source with α surface pollution characteristics and no harm to personnel and the environment is developed, which is applied to the simulation training of α surface pollution detection and decontamination. Simulated sou...

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Problems solved by technology

However, these simulation sources need to be used in conjunction with specific real α surface pollution detection instruments, which greatly limits their scope of use

In addition, in the prior art, it is also proposed to use light-emitting diodes to make simulated sources, or to make simulated clothes with surface pollution, and use the barcode on the simulated clothes as simulated sources; It is used for surface pollution simulation; the simulated value of the barcode on the simulated clothing is fixed, and it is difficult to simulate the change process of decontamination and decontamination of the α surface; and these two simulation methods have relatively large limitations and cannot effectively simulate the α surface pollution

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