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Device and method for detecting smog particles based on solar-blind ultraviolet light

A particle detection and ultraviolet light technology, applied in the field of ultrafast optical technology and nonlinear optics, can solve the problems of inability to dynamically detect atmospheric haze particles, low accuracy of haze detection technology, and high cost

Inactive Publication Date: 2017-09-22
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a device for detecting haze particles based on solar-blind ultraviolet light, which solves the problem of low accuracy of haze detection technology, large environmental influence factors, high cost, and inability to detect atmospheric haze under the existing technical conditions. The problem of real-time rapid dynamic detection of particulate matter

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Embodiment Construction

[0079] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0080]A device for detecting smog particles based on solar-blind ultraviolet light, including an LED lamp 1 for emitting ultraviolet light, a spatial filter 2, a collimating lens 3, a polarizer 4, and λ / 4 are sequentially arranged along the direction of ultraviolet light propagation Wave plate 5, molecular gas container 6 and photodetector 7; Polarizer 4, λ / 4 wave plate 5 are connected with stepper motor controller 8 respectively, computer 9 is connected with stepper motor controller 8; The present invention is based on Japanese The schematic diagram of the device for detecting haze particles by blind ultraviolet light is as follows: figure 1 shown.

[0081] The photodetector 7 includes a coated beam splitter 10, a polarization beam splitter prism a11, a polarization beam splitter prism b12, a photomultiplier tube a13, a photomultiplier tube...

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Abstract

The invention discloses a device for detecting fog and haze particles based on solar-blind ultraviolet light. The / 4 wave plate, the molecular gas container and the photoelectric detector; the polarizer and the λ / 4 wave plate are respectively connected with the stepping motor controller, and the computer is connected with the stepping motor controller. The invention also discloses a method for detecting smog particles using the above-mentioned device: firstly, measure the instrument matrix A of the photodetector; then, use the measured instrument matrix A to obtain the scattered light after irradiating the smog particles to be measured with polarized ultraviolet light The Stokes vector matrix Sout; finally, according to the mie scattering theory, the particle size of the haze particles to be measured is obtained. The method of the invention overcomes the limitation of the measurement space of the cassette, is not affected by ambient humidity and temperature, and is not interfered by background light, and can realize all-weather open measurement of haze while reducing equipment costs, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of ultrafast optical technology and nonlinear optics, and specifically relates to a device for detecting haze particles based on solar-blind ultraviolet light; the invention also relates to a method for detecting haze particles by using the detection device. Background technique [0002] In recent years, with the rapid development of my country's economy and society, smog weather has become a prominent environmental problem. In particular, it is difficult to see "blue sky and white clouds" over large and medium-sized cities. The documentary "Under the Dome" in early 2015 also profoundly told people: the control of smog is urgent. Haze weather is a state of air pollution, which is a general expression of the excessive content of various suspended particulate matter in the atmosphere, and its PM2.5 (ParticulateMatter 2.5) is considered to be the "culprit" of haze weather. PM2.5 refers to the particles floating in the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02
Inventor 赵太飞王婵刘园
Owner XIAN UNIV OF TECH
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