Particulate matter measuring instrument and working method thereof

Abstract

The invention discloses a particulate matter measuring instrument and a working method thereof. A target sample gas channel of the particulate matter measuring instrument penetrates through a measuring gas chamber, and an emission light source assembly, a sampling assembly and a calibration assembly are installed on the measuring gas chamber and distributed in the circumferential direction of thetarget sample gas channel; the emission light source assembly, the sampling assembly and the calibration assembly are all provided with optical lenses; through holes are formed in the positions, facing the optical lenses, of the target sample gas channel; the through holes are communicated with the measuring gas chamber; spraying columns are installed on the measuring gas chamber and located on one sides of the optical lenses, and the spraying directions of the spraying columns are in the tangential direction of the surfaces of the optical lenses. By blowing compressed gas to the surface of the optical lenses, particles can be prevented from being deposited on the surfaces of the optical lenses, the surface cleanness and measurement result of the optical lenses are ensured, and long-time maintenance is avoided.

Description

technical field [0001] The invention relates to the technical field of particle measurement, in particular to a particle measuring instrument and a working method thereof. Background technique [0002] At present, it is widely used in the detection of particle concentration at home and abroad. After the light passes through the smoke particles in the gas chamber, the light intensity is weakened, and the smoke particles scatter it to all directions. The intensity of the light signal in each scattering direction is proportional to the concentration of smoke particles. . According to the intensity of the light signal scattered by the received particles, the electrical signal is converted, and the particle concentration can be measured by calculation. [0003] At present, research and development personnel in this field are researching the technical defects of the existing known technologies of this type of measuring instrument device. Optical lenses are heavily contaminated. ...

AI Technical Summary

Problems solved by technology

[0003] At present, research and development personnel in this field are researching the technical defects of the existing known technologies of this type of measuring instrument device. Optical lenses are heavily polluted

When the optical lens is polluted, it will affect the accuracy of the particle concentration measurement. This problem has not been solved in this field at home and abroad. Therefore, there is an urgent need for a particle measuring instrument that can reduce the pollution of the optical lens and have more accurate measurement results.

Images