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Particulate matter concentration detection device

A particle concentration and detection device technology, which is applied in the direction of measurement devices, particle suspension analysis, color/spectral characteristic measurement, etc., can solve the problems of large measurement pool structure, large deviation of measurement data, cavity stray, etc., and achieve improvement The effect of monitoring sensitivity, accurate measurement data and large contact area

Pending Publication Date: 2022-06-03
杭州云斐科技有限公司
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Problems solved by technology

At the same time, in order to meet the ultra-low emission measurement requirements, the detection limit of the device is relatively high. The traditional design uses point-shaped parallel lasers for measurement. The structure of the measurement cell is too large, and there are strays in the cavity. , the measurement data will have a large deviation, and frequent zero calibration is required to ensure that the measurement data is relatively stable

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  • Particulate matter concentration detection device
  • Particulate matter concentration detection device
  • Particulate matter concentration detection device

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Embodiment Construction

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Wherein the same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top" ", "inner" and "outer" refer to directions toward or away from the geometric center of a particular part, respectively.

[0020] see Figure 1-7 , the present invention provides a technical solution: a particle concentration detection device, comprising a measurement cavity 1, the measurement cavity 1 is provided with an air guide pin, the air guide pin is installed in the measurement cavity 1 through the ventilation ring 2, and the compressed air Through the eight holes around the ventilation ring 3, the uniformly dispersed compressed air flows out through the gap between the air guide pin ...

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Abstract

The invention discloses a particulate matter concentration detection device which is characterized in that a gas guide plug pin is arranged on a measurement cavity and is mounted in the measurement cavity through a ventilation ring, a convex lens is mounted in a lens support through a lens pressing ring, a cylindrical mirror support is mounted on the measurement cavity, a cylindrical mirror is mounted in the cylindrical mirror support through a cylindrical mirror pressing ring, and the cylindrical mirror is mounted in the cylindrical mirror support through a cylindrical mirror pressing ring. The cylindrical mirror is communicated with one end of the incident light channel, one end of the emergent light channel is provided with a light trap, the cylindrical mirror support is provided with a laser support through a plurality of heat insulation columns, a laser is arranged in the laser support, laser is converged through the cylindrical mirror to form a linear light spot, and a measuring surface is formed in the measuring cavity. Gas to be measured is guided into a measuring surface through the gas guide plug pin, clean protective gas is guided into the outside, and the gas guide plug pin and the ventilation ring are combined to form annular sheath gas to wrap the gas to be measured and prevent diffusion, so that no particulate matter enters an incident light channel and a light trap channel port to pollute a lens and a light trap.

Description

technical field [0001] The invention relates to the technical field of particle concentration detection devices, in particular to a particle concentration detection device. Background technique [0002] Airborne particulate matter is a multiphase mixed system composed of solid and liquid particles suspended in the air. These fine particles are easy to become carriers and reactants of other pollutants, and many substances potentially harmful to human body are mainly concentrated on the fine particles, so they have attracted more and more attention. [0003] At present, the mainstream smoke and dust measurement methods on the market mainly include gravimetric method, light dispersion method, charge method and beta ray method. [0004] When using the laser method to measure particulate matter, especially in the case of fixed pollution sources, due to the large amount of water vapor and various corrosive substances in the measurement gas, with the accumulation of time, the rele...

Claims

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Application Information

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IPC IPC(8): G01N15/06G01N21/01G01N21/39
CPCG01N15/0618G01N15/0625G01N21/01G01N21/39Y02A50/20
Inventor 王大伟廖义雷汪旭斌王春雷史文豪
Owner 杭州云斐科技有限公司
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