All-weather PM2.5 concentration real-time detection device based on CCD (charge coupled device) lateral scattering

Abstract

The invention discloses an all-weather PM2.5 concentration real-time detection device based on CCD (charge coupled device) lateral scattering. The device comprises a detection dark box, a laser emitting unit, a light capturing unit and a blowing mechanism, wherein a first cavity and a second cavity which are communicated are formed in the detection dark box, and the first cavity is filled with a moisture absorbing material; the blowing mechanism is communicated with the first cavity of the detection dark box; the second cavity of the detection dark box is communicated with the outside; the light capturing unit comprises a CCD and a processor, the CCD captures and collects laser information and transmits the information to the processor through a data line; the laser emitting unit and the CCD are arranged in the second cavity of the detection dark box, and the optical axis of the CCD is perpendicular to the optical axis of the laser emitting unit. All-weather PM2.5 detection is realizedwith a CCD lateral scattering method, and the influence of moisture is avoided.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, in particular to an all-weather PM2.5 concentration real-time detection device based on CCD side scattering. Background technique [0002] At present, my country's air pollution is still serious, one of the manifestations is soot pollution, and the result is that the concentration of total suspended particulates in the atmosphere exceeds the standard. Inhalable fine particulate matter, as a component of total suspended particulate matter, is very harmful to human health. The smaller the particle diameter, the deeper the part that enters the respiratory tract. Particles with a diameter of 10 microns are usually deposited in the upper respiratory tract, and particles below 2 microns can penetrate deep into the bronchioles and alveoli. After fine particles enter the human body to the alveoli, they will directly affect the ventilation function of the lungs, making the body prone to hypoxia. ...

AI Technical Summary

Problems solved by technology

However, in the past, the method of using CCD measurement has high requirements on ambient light, and it cannot be measured during the day, but can only be measured at night when the ambient light is dark. Such measurement does not have the real-time function during the day.

Secondly, the air humidity in the south is high, directly using the CCD to measure the scattered light of the laser in the atmosphere is easily affected by the moisture in the air, resulting in deviations in the results

Images