A multi-component atmospheric pollution gas detection photoacoustic spectrometry device based on sun tracking

Abstract

The invention discloses a multi-component atmospheric pollution gas detection photoacoustic spectrometry device based on sun tracking, which is mainly used for monitoring some gas molecules with characteristic absorption, such as sulfur dioxide, nitrogen dioxide, ozone and the like, in the atmosphere in a sunlight spectrum band. According to the system, a parabolic mirror for focusing sunlight isfixed on a solar tracker to track the sun in real time; the sunlight focused by the parabolic mirror is collimated by a collimating lens and enters a light splitting device; the light splitting devicesplits light with different wavelengths and then performs respective parallelism, then amplitude modulation is performed through a chopper, a photoacoustic signal generated by the modulated light ina photoacoustic cell is detected by a detector and then input into a computer for demodulation, and the concentration of corresponding gas is obtained through inversion. The system takes the sun as alight source, can continuously measure the concentration of the main pollution gas in the atmosphere in real time, is simple in structure and low in cost, can meet the requirement of multi-component atmospheric pollution gas detection, and provides a new monitoring means for atmospheric pollution monitoring.

Description

technical field [0001] The invention relates to a multi-component air pollution gas detection photoacoustic spectroscopy device based on sun tracking, in particular to the field of air pollution gas monitoring. The device uses sunlight as the light source, uses the sun tracker to track the sun, separates the light of different wavelengths through the spectroscopic device, selects the absorption wavelength of the polluted gas to be measured, enters the photoacoustic pool, and uses the photoacoustic effect to measure the atmospheric pollution during the daytime. Real-time continuous monitoring. Background technique [0002] Air pollution is a matter of great concern to people, and it has important practical significance for the monitoring, control and treatment of air pollution gases. Therefore, in the field of air pollution gas monitoring, control and treatment, the development of new methods and technologies with independent intellectual property rights can provide a strong...

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly provides a high-sensitivity photoacoustic absorption measurement device capable of tracking the sun and continuously monitoring multiple components of the actual air pollution gas, which can be used to measure the photoacoustic absorption spectrum of air pollution gas molecules, and overcomes the existing single The light source requires current, temperature control and short life of the light source, etc.

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