Device for detecting haze particles based on solar-blind ultraviolet and detection method thereof

Abstract

The invention discloses a device for detecting haze particles base on solar-blind ultraviolet and a detection method thereof, and the device for detecting the haze particles comprises an LED (Light Emitting Diode) lamp used for emitting ultraviolet light, a spatial filter, a collimating lens, a polarizer, Lambada / 4 wave plate, a molecular gas container and a photoelectric detector are arranged along the ultraviolet light propagation direction in sequence; the polarizer, the Lambada / 4 wave plate are respectively connected with a stepper motor controller, and a computer is connected with the stepper motor controller. The invention also discloses a detection method for the haze particles by utilizing the device, the method comprises the steps of measuring the instrument matrix A of the photoelectric detector firstly; utilizing the measured instrument matrix A to obtain the Stokes vector matrix Sout of scattered light secondly after polarized ultraviolet light irradiates the haze particles to be detected; obtaining the diameters of the haze particles to be detected according to the mie scattering theory finally. The device for detecting the haze particles based on the solar-blind ultraviolet and the detection method thereof can overcome the limitation of a cassette measurement space, are not affected by the environment humidity and temperature, and are not affected by intereference of background light; all-weather open measurement to haze can be realized, meanwhile, the equipment cost is reduced, and is suitable for the industrial manufacture.

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 (ParticulateMatter2.5) is considered to be the "culprit" of haze weather. PM2.5 refers to the particles floating in the ai...

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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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