Portable bioaerosol detection device and method

Abstract

The invention relates to a portable bioaerosol detection device and method. The portable bioaerosol detection device adopts a double-light-source excitation technology, a light splitting system basedon a narrow-band filter array and a photoelectric detection system based on a silicon photomultiplier (SiPM), solves the problems of insufficient accuracy, poor signal-to-noise ratio, insufficient stability and the like in the existing fluorescence spectrum detection system, has the advantages of simple structure, lower cost and the like, and effectively ensures the convenience, reliability and universality of the system.

Description

technical field [0001] The invention relates to the field of optoelectronics, in particular to a portable bioaerosol detection device and method. Background technique [0002] In recent years, due to the public's concern about the quality of ambient air, the detection technology of atmospheric aerosols, especially atmospheric bioaerosols, has become one of the hot research fields today. Atmospheric aerosol is a stable mixed system composed of solid particles and liquid particles uniformly dispersed in the atmosphere. The particles in it are collectively called aerosol particles, and the particle size of the particles is between 0.01-10um. Among them, living biological species or particles are collectively referred to as bioaerosol particles, including microorganisms such as viruses, bacteria, fungi, pollen, and spores. If the concentration of aerosol is too high, it will pose a threat to human health. In particular, bioaerosols in the air can cause acute diseases in humans...

AI Technical Summary

Problems solved by technology

At present, most bioaerosol detection systems use monochromators as spectrometers, resulting in serious attenuation of fluorescence signals and limiting the signal-to-noise ratio of the system; most bioaerosol detection systems use photomultiplier tubes (PMTs) as photoelectric detection. Devices have disadvantages such as high working bias voltage, fragility, and high cost, which limit the portability and reliability of the system; many aerosol detection systems use a single light source for excitation, which limits the detection types of aerosol particles

Some aerosols, such as bovine serum albumin, oil fume exhaust, etc., will also produce fluorescence similar to biological aerosols under certain single ultraviolet excitation conditions, resulting in misjudgments and false alarms

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