Multi-lane motor vehicle tail gas detection system

Abstract

The invention discloses a multi-lane motor vehicle tail gas detection system, which comprises a monitoring point processor and detection sub-systems in lanes. Each detection sub-system comprises a vehicle detection device, a tail gas detection device, a license plate detection device and a reflection zone. Each tail gas detection device comprises an infrared light emitter, an infrared light receiver, an infrared signal processing unit, an ultraviolet light emitter, an ultraviolet light receiver and an ultraviolet signal processing unit, wherein the infrared light emitter and the infrared light receiver are arranged in pair above the reflection zone and the ultraviolet light emitter and the ultraviolet light receiver are arranged in group above the reflection zone. Each tail gas detection device comprises a cradle head and an image acquisition device. Each vehicle detection device comprises a light emitter, a light receiver and a control unit, wherein the light emitter and the light receiver are arranged above the reflection zone. In the system disclosed by the invention, as the infrared rays and the ultraviolet rays in each lane are transmitted in directions which are perpendicular to each other approximately, the pollutant concentrations in tail gases of motor vehicles in the lanes can be detected at the same time without mutual interference, namely the pollutant concentrations in tail gases of motor vehicles in the lanes can be detected accurately at the same time.

Description

Technical field [0001] The invention relates to the technical field of environmental detection, in particular to a multi-lane motor vehicle exhaust detection system. Background technique [0002] With the rapid development of social economy and the improvement of people’s living standards, the number of motor vehicles is increasing year by year, and the negative impact of motor vehicle exhaust on the urban atmospheric environment is also increasing. The main manifestations are human respiratory diseases and excessive surface ozone. High, increase the urban heat island effect and produce photochemical smog. Therefore, the importance of detecting the concentration of motor vehicle exhaust pollutants is becoming increasingly apparent. [0003] At present, the most commonly used methods for detecting motor vehicle exhaust at home and abroad are: no-load test method (including idle speed method, idle speed / high idle speed method, dual idle speed method and free acceleration test method...

AI Technical Summary

Problems solved by technology

When there are motor vehicles passing by in multiple lanes, the infrared light received by the infrared receiver and the ultraviolet light received by the ultraviolet receiver are absorbed by the exhaust of multiple motor vehicles, so only the sum of the exhaust pollutant concentrations of multiple motor vehicles can be detected , to achieve a preliminary analysis of the concentration of exhaust pollutants from multiple motor vehicles, but it is impossible to accurately detect the concentration of exhaust pollutants of each motor vehicle

It can be seen that the above-mentioned multi-lane motor vehicle exhaust telemetry device has the following disadvantages: the exhaust pollutant concentration of the motor vehicle can be accurately detected when there is only one motor vehicle passing on the multi-lane. Detect the concentration of exhaust pollutants of multiple motor vehicles separately

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