Laser radar system for smoke plume emission detection

Abstract

The invention discloses a laser radar system for smoke plume emission detection. The laser radar system comprises a box body, a plurality of lasers, photoreceivers and a stepper motor, wherein the lasers are arranged in a mounting groove, are fixed to each other through a mounting column and are fixed to the bottom wall of the mounting groove, and the photoreceivers are fixed on the side wall of a discharge hole and are connected with a computer through cables; a cover plate is movably arranged at one end, far away from a groove, of the discharge hole. The laser radar system disclosed by the invention, consisting of the lasers and the photoreceivers, is used for detecting smoke plume discharged from a chimney, multiple groups of measurement can be completed simultaneously, and then, an average value is obtained, so that measurement time can be saved while measurement errors are reduced; by using the fact that different particulate matters have different absorption rates to light of different wavelengths, the variety of the particulate matters in the smoke plume can be figured out very effectively; through intelligent control, the manual labor is reduced, and the operation is simple.

Description

technical field [0001] The invention relates to the technical field of plume detection, in particular to a plume discharge detection laser radar system. Background technique [0002] The smoke plume refers to the smoke body continuously discharged from the chimney of the factory. It is named because the shape is feathery. Because the smoke plume is the exhaust gas, the smoke plume will contain different sizes of particulate pollutants, so we need to The smoke plume discharged from the factory chimney is inspected before discharge. [0003] For the detection of plume, it is mainly the detection of its concentration and the type of particulate matter. At present, direct measurement methods mainly include human eye observation and digital camera method: human eye observation is highly random, and the shortcomings of this method are obvious, and subjective errors in naked eye observation are inevitable. ; Digital camera method, this method judges the opacity by comparing the li...

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Problems solved by technology

[0003] For the detection of plume, it is mainly the detection of its concentration and the type of particulate matter. At present, direct measurement methods mainly include human eye observation and digital camera method: human eye observation is highly random, and the shortcomings of this method are obvious, and subjective errors in naked eye observation are inevitable. ; Digital camera method, this method judges the opacity by comparing the light intensity changes of the camera pictures before and after the plume passes through, but this method has done too much to the actual light radiation transmission process, especially the particle scattering and extinction process simplified, which affects the reliability of the results

[0004] In the prior art, a Chinese invention patent with the publication number CN201510145580.8 "Laser measurement method and device for the opacity of fugitive particulate matter plume" is disclosed, which measures the plume through the transmittance of the plume to the laser. Concentration measurement and calculation, but this invention has the following obvious defects: 1. To measure the plume by this method, it is necessary to repeat the measurement many times to reduce the error as much as possible, but repeated measurement will lead to waste of time; 2. The light transmittance of the plume is detected by the laser emitted by a single laser, and the material type of the particulate matter inside the plume cannot be measured well, making the detection incomplete; 3. Using this device to detect the plume, if The plume detection does not meet the emission standards, and it cannot control the plume emission well

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