Exhaust gas blackness automatic detection device for diesel vehicles

Abstract

The invention discloses an exhaust gas blackness automatic detection device for diesel vehicles. The exhaust gas blackness automatic detection device comprises an image collecting unit, an image preprocessing unit, a vehicle speed and acceleration measuring unit, a license plate identifying unit and a blackness identifying unit. Through the exhaust gas blackness automatic detection device, the speed and acceleration data of diesel vehicles are obtained through a laser method to assist in blackness identification; license plate images and exhaust gas images of diesel vehicles are obtained on the testing section coated with white paint through a vertical shooting method; license plate information and ringelmann blackness level of the diesel vehicles are obtained by preprocessing image and identifying blackness.

Description

technical field [0001] The invention relates to an automatic detection device for blackness of smoke from a diesel vehicle, which belongs to the technical field of environment. Background technique [0002] At present, most of the diesel vehicle blackness detection devices in China are subjective analog detection instruments, which are mainly realized by pure optical or photoelectric physical means. Most provincial and municipal environmental protection departments use low-cost subjective analog detection instruments to detect the blackness of diesel vehicle smoke, and the accuracy and reliability of the test are difficult to guarantee. A large number of data statistics show that there is a 0.5-0.6 Ringelman series difference between untrained observers, and a 0.28-0.32 Ringelman series difference between trained observers. Moreover, all detection instruments require that the driving conditions of the test vehicle be given, and no corresponding detection results are given f...

AI Technical Summary

Problems solved by technology

The comparison method requires that the distance from the smoke map to the observer's eyes should be no more than 2m, generally about 1.5m, and the blackness level value should be determined based on the subjective judgment of the observer; The distance between the eyepiece and the eyepiece is very small, which greatly affects the accurate judgment of the observer on the blackness; the photoelectric smoke measurement method requires a clear sky as the background, and under the weather conditions of haze and cloudy or uneven cloud thickness, Large interference, poor test effect

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