Fluorescent particulate matter detection device and method
A fluorescent particle and detection device technology, which is applied in the field of particle detection, can solve the problems of non-dynamic and slow detection of chemical fluorescence analysis methods, and achieve the effect of easy device modification
Active Publication Date: 2020-06-12
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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[0005] In order to solve the problems of slow, non-dynamic and non-single-particle detection in the chemical fluorescence analysis method in the prior art, the present invention provides a fluorescent particle detection device and method
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[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0029] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be used for both fixing function and circuit communication function.
[0030] It is to be understood that the terms "length", "width", "top", "bottom", "front"...
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The invention provides a fluorescent particulate matter detection device and method, and the device comprises a laser source which is used for emitting laser; a wavelength selection unit connected with the laser source and used for dynamically adjusting the wavelength of the laser emitted by the laser source; a focusing unit connected with the laser source and used for focusing the laser into sheet light; a polarizing unit connected with the focusing unit and used for modulating the polarization state of the sheet light; a particulate matter testing area arranged behind the polarizing unit and used for allowing a to-be-tested air sample to pass through; a detection unit which comprises detection subunits symmetrically arranged at the periphery of the particulate matter test area and usedfor detecting polarization scattering light intensity information and fluorescence intensity information of the particulate matters in the to-be-tested air sample flowing through the particulate matter test area at different angles after laser scattering; and a calculation processing unit and a spectrum demodulation unit. The calculation processing unit and a spectrum demodulation unit are connected with the detection unit and are respectively used for analyzing fluorescence characteristics and polarization characteristics of the particulate matters and carrying out spectrum demodulation to obtain spectrum information. Preliminary fluorescence classification information and more detailed spectral information can be obtained.
Description
technical field [0001] The invention relates to the technical field of particle detection, in particular to a fluorescent particle detection device and method. Background technique [0002] The impact of atmospheric particulate matter on the environment is becoming more and more serious, and its composition is complex and its sources are diverse. Researchers need to discriminate and analyze the sources of particulate matter based on their physical and chemical characteristics. Most of the atmospheric particles that can produce fluorescence show high toxicity. The identification of such fluorescent particles can provide clues for the study of their types and sources, and is of great help to the study of particle characteristics. Such as figure 1 As shown, when a substance with a fluorescent functional group is irradiated by an excitation light source, according to the explanation of the energy level transition, when the fluorescent substance is excited, the substance molecul...
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IPC IPC(8): G01N15/10G01N21/64
CPCG01N15/10G01N21/64G01N2015/1022
Inventor 曾楠许启之何永红马辉
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV