On-line monitoring system for air quality in roadside breathing zone

Abstract

The invention discloses a road side breathing zone air quality online monitoring system, comprising a cabinet, as well as an industrial control computer, a temperature and humidity sensor, a photoelectric coupler, a gas calibration device, a power module, a control module, a laser module, a deuterium lamp module, an infrared detection and acquisition module and a motor drive module arranged in the cabinet, wherein the control module is connected with the power module; the laser module is used for monitoring the concentration of carbon oxides in air, and comprises a laser, a temperature control circuit, an overcurrent protection circuit, a signal generation frequency doubling circuit and a drive circuit; the deuterium lamp module is used for monitoring the concentration of nitrogen oxides in air; and the infrared detection and acquisition module comprises an infrared detection drive circuit, an infrared detector, a phase-locked amplifying circuit and an acquisition card connected in sequence. The system is mainly used for monitoring the quality of air on two sides of near-surface roads, can simultaneously measure the concentrations of multiple gases such as CO, CO2, NO, NO2 and the like in air, and is large in monitoring data volume and high in monitoring accuracy and automation degree.

Description

technical field [0001] The invention relates to the field of environmental monitoring equipment, in particular to an online monitoring system for air quality in a roadside breathing zone. Background technique [0002] With the rapid development of cities and social economy, the continuous improvement of the degree of industrialization and the continuous increase of road vehicles lead to the CO, CO in the air on both sides of the ground road 2 , SO 2 , NO, NO 2 , O 3 The concentration of other gases is also greatly increased, the urban environment is seriously polluted, and the air quality is worrying. Especially in northern cities, there are often all-weather smog. Therefore, the air pollution problem on both sides of the road has become an unavoidable important issue in the process of urban construction and development. One of the livelihood issues. [0003] At present, the non-dispersive infrared gas filter correlation method is widely used in the measurement of carbon...

AI Technical Summary

Problems solved by technology

[0004] The concentration of various gases in the air on both sides of the road is changing in real time. The existing air quality monitoring system usually does not have strong real-time monitoring performance, the amount of monitoring data is small and the accuracy is not high, and it can only detect one type of gas such as carbon oxidation. If the concentration of various gases or nitrogen oxides is measured, if the concentration of multiple gases is measured, the equipment is huge and complex, the cost is high, the anti-interference ability is poor, and the monitoring results are poor.

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