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Particulate matter detection system and method based on laser coherent detection

A particle detection and coherent detection technology, applied in the field of particle detection, can solve the problem of not being able to guarantee the laser energy to a large extent, and achieve the effect of guaranteeing the energy

Pending Publication Date: 2022-01-28
上海北分科技股份有限公司
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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a particle detection system and method based on laser c

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  • Particulate matter detection system and method based on laser coherent detection
  • Particulate matter detection system and method based on laser coherent detection
  • Particulate matter detection system and method based on laser coherent detection

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Embodiment Construction

[0029] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and number of componen...

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Abstract

The invention provides a particulate matter detection system and method based on laser coherence detection, the particulate matter detection system based on laser coherence detection comprises: a laser device for emitting a laser beam, wherein the laser beam passes through a detected particulate matter; a coherent device which is used for splitting the laser beam penetrating through the detected particulate matter, so that different signal light formed by splitting interferes with each other and interference fringes are generated; and an interference fringe detection device used for detecting the interference fringes. According to the invention, the coherent detection of scattered light of particulate matters is realized.

Description

technical field [0001] The invention belongs to the technical field of particle detection, and relates to a particle detection method, in particular to a particle detection system and method based on laser coherent detection. Background technique [0002] Light scattering is the phenomenon that light beams deviate from the original direction of propagation and scatter to the surroundings when they pass through an inhomogeneous medium. People use the scattering phenomenon of light to develop various particle detection systems, such as penetrating turbidimeter, laser forward scattering dust meter, laser back scattering dust meter, etc. In order to reduce signal noise, some people use various modulation and demodulation algorithms to reduce noise, but all detections are calculated based on the energy of the scattered light. [0003] However, the energy of the laser will be affected by the temperature and current fluctuations of the laser, the pollution of the lens on the optic...

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Application Information

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IPC IPC(8): G01N15/06
CPCG01N15/06G01N2015/0693
Inventor 李熠豪王占锋
Owner 上海北分科技股份有限公司
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