Multichannel fluorescence spectra biological aerosol particle detecting apparatus

Abstract

The invention discloses a multichannel fluorescence spectra biological aerosol particle detecting apparatus. The apparatus comprises the following components: an aerosol air-flow generation unit for generating aerosol particle gas; a laser detection unit, which is arranged corresponding to the aerosol air-flow generation unit, in order to carry out laser irradiation and detection of partial aerosol particle gas outputted from the aerosol air-flow generation unit, and to obtain diffusion light signals and intrinsic fluorescence signals of the aerosol particles; a total flow controlling and exhausting unit, which is arranged corresponding to the aerosol air-flow generation unit, in order to carry out filtering and discharge of aerosol particles which are outputted from the aerosol air-flow generation unit and do not pass through the laser detection unit and aerosol particles which pass through the laser detection unit; an analyzing unit, which is used for accurately determining classes of the aerosol particles according to the diffusion light signals and the intrinsic fluorescence signals of the aerosol particles.

Description

technical field [0001] The invention relates to the technical field of aerosol particle detection, in particular to a detection device for multi-channel fluorescence spectrum biological aerosol particles. Background technique [0002] Aerosol particles with life (including microbial particles such as bacteria, fungi, and viruses) and active particles (pollen, spores, etc.) and various plasmids released into the air by living organisms are collectively referred to as bioaerosols. All these naturally occurring or intentionally released airborne particles can seriously affect human health. Traditional microbial and pollen monitoring takes a significant amount of time between sample collection and analysis. [0003] In recent years, for the real-time and continuous characterization of atmospheric particles, gases, body fluids, or bacterial metabolites, considerable efforts have been made to develop monitoring systems that use lasers or other light sources to induce intrinsic fl...

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Problems solved by technology

[0006] However, due to the single wide fluorescent band detection of the above-mentioned detection technology, the classification of biological aerosol particle types is very limited, and some can only be used to distinguish biological and non-biological aerosol particles, and cannot achieve fine classification; , tobacco smoke, and paper dust and other interferences whose fluorescence emission peaks are similar to biological particles; the detection equipment is not compact enough to be integrated into some dynamic detection equipment, which affects the operating range and potential application capabilities; for particle data The analysis and classification methods are not concise and efficient, and the accuracy is not high enough, and the analysis and classification results of particles cannot be output in real time and intuitively; it only has good detection performance for single-component bioaerosols, and the detection and classification performance for mixed aerosols is insufficient.

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