Light path debugging method and system for motor vehicle pollution detection equipment

Abstract

The invention provides a light path debugging method and system for motor vehicle pollution detection equipment, and the method comprises the steps: transmitting a beam of infrared laser from one side to the other side after reflection, and forming a first light path; emitting a beam of visible light into a first light path; the incident angle of the visible light is adjusted, so that the visible light and the first light path are kept coaxial, and then the spectrum of the infrared laser is reflected back along the original path; the reflected infrared laser light signal is converted into an electric signal, and the pollutant concentration is calculated through processing. According to the invention, the defects that the light path debugging of the traditional equipment for detecting the pollution of the motor vehicle is limited by environmental conditions, the debugging time is long, the number of personnel is large, the process is complicated and the potential safety hazard is large during debugging are overcome, and when the infrared spectral line is debugged outdoors, a light beam quality analyzer, a spectrum color card and other equipment are not needed to search the light position; and optical path debugging can be carried out at any time in 24 hours all day, and the problem that the optical path is difficult to calibrate in the equipment installation and operation process is solved.

Description

technical field [0001] The invention relates to the technical field of motor vehicle pollution detection, in particular to an optical path debugging method and system for motor vehicle pollution detection equipment. Background technique [0002] Pollution from mobile sources such as motor vehicles has become an important source of air pollution, and the importance of pollution prevention and control from mobile sources has become increasingly prominent. Pollutants emitted by motor vehicles have brought serious pollution to the atmospheric environment. At present, the main products for measuring motor vehicle pollution include motor vehicle exhaust remote sensing detection system and open traffic atmospheric environment monitoring system, which use ultraviolet spectrum absorption technology to monitor pollutants in the ultraviolet band. [0003] Ultraviolet spectrum absorption technology is used to test motor vehicle pollution: all of which are in the invisible light band, o...

AI Technical Summary

Problems solved by technology

It is difficult to adjust the light during on-site installation. This method has requirements for the environment and the optical path of equipment installation. It is required that the environment is relatively dark and the optical path of the optical path is short. Cooperate to debug: one person debugs the instrument, and the other needs to check the position of the light in real time. It takes a long time to find the position of the ultraviolet spectrum, and it is necessary to coordinate with the traffic department on the running time of road vehicles

[0004] The open traffic atmospheric environment monitoring system is used for testing: it is generally installed on the roadside of the road, consisting of a main engine and an auxiliary machine, so that the optical path passes through the area to be tested on the road, and the debugging personnel need to move on the road for confirmation when debugging the optical path The position of the optical path will detect the light emitted by the laser and inject it into the detector for photoelectric conversion; and after the equipment is installed for a period of time, due to geological subsidence at the installation location, vibration caused by vehicle operation, climate change and other reasons, the position of the optical path will be changed. Therefore, the optical path should be calibrated regularly. The calibration steps are the same as the steps for equipment installation and debugging of the optical path. Therefore, it takes a long time and more frequency for personnel to debug on the road, which is more dangerous.

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