Early warning method for detecting and identifying nuclear-biological-chemical aerosol particles in air

Abstract

The invention discloses an early warning method for detecting and identifying nuclear-biological-chemical aerosol particles in the air, which comprises the following steps that: aerosol particles are accumulated on a substrate, and after a certain time period, an effect of dynamic balancing is achieved; nuclear elements are detected by using a semiconductor detector, and when the air contains radioactive nuclear elements, the dynamic balancing is destroyed, and a nuclear early-warning signal is sent; a concentration / dose model is established according to the setup parameters of the aerosol particles, and a predicted concentration dose of the next period is obtained according to setup parameters obtained through real-time measurement; the predicted concentration dose is compared with the actually-measured concentration dose of the next period, when the difference between the two concentration doses exceeds a preset threshold, a primary early-warning signal is sent; and after the primary early-warning signal is sent, the type of biological particles and / or the type of chemical toxicants are determined according to the detection on the biological particles and the chemical toxicants, and a biological and / or chemical secondary early-warning signal is sent.

Description

technical field [0001] The invention relates to the field of aerosols, in particular to an early warning method for detecting and identifying nuclear, biological and chemical aerosol particles in the air. Background technique [0002] Countless aerosol particles are suspended in the air, and these suspended particles are very likely to contain or carry radioactive substances, pathogenic microorganism particles and chemical gases that endanger human health and even life safety. It is particularly important to monitor whether there are harmful aerosol particles in the air, and to detect their concentration and characteristics. [0003] Some current nuclear, biological and chemical joint monitoring systems are only a simple integration of the above three monitoring devices. Although they can monitor the three substances at the same time, they are inconvenient to operate, low in efficiency, and have problems such as signal interference. In 2003, U.S. Patent US6539311B1 disclose...

AI Technical Summary

Problems solved by technology

The problem with this instrument is that the concentration change rate of the aerosol sample is used for monitoring and early warning conditions. There are certain errors in this alarm condition, and device failure will also cause concentration changes, which increases the false alarm rate.

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