Method and system for measuring Ringelmann blackness of motor vehicle exhaust
A measurement method and measurement system technology, applied to image detector methods, image signal processing, measurement devices, image enhancement, etc., can solve the problems of low efficiency of on-site detection and failure to effectively reflect exhaust pollution, and achieve The effect of saving labor costs, avoiding road congestion, and improving detection efficiency
Active Publication Date: 2020-07-24
佛山市南海区环境保护监测站
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Problems solved by technology
Due to the limitations of equipment and test conditions, the efficiency of on-site detection is not high for these two methods, and the occupied roads need to be blocked, and the vehicles are not in a normal driving state, which cannot effectively reflect the real exhaust pollution of the vehicles in use.
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[0034] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0035] The "background image" and "measurement image" described in the present invention are dynamic video images, and the dynamic video images not only include all the information in the static photo image, but also can pass the distribution of the gray value of the optical flow in different images Change trends, strengthen the recognition of exhaust gas body, and effectively improve the recognition accuracy.
[0036] see figure 1 , 2, the measuring method of the motor vehicle exhaust Ringelmann blackness of the preferred embodiment of the first aspect of the present invention compris...
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The invention discloses a method and system for measuring the Ringelman emittance of motor vehicle exhaust gas. The method comprises the following steps: S1, acquiring a road surface image of a presetplace as a background image; S3, acquiring an image when a motor vehicle releases exhaust gas as a measurement image, wherein the measurement image comprises a contour of the motor vehicle and the exhaust gas released by the motor vehicle; S4, removing a part of the measurement image identical to the background image to obtain an exhaust gas image; S5, removing the contour of the motor vehicle inthe exhaust gas image to obtain an exhaust gas body; and S6, determining the Ringelman emittance of the exhaust gas body: calculating an average gray value of the exhaust gas body according to the exhaust gas body, and comparing the average gray value with Ringelman emittance parameters to obtain a Ringelman emittance level of the exhaust gas body. The method provided by the invention can detectthe Ringelman emittance of the motor vehicle exhaust gas in a driving process of the vehicle without blocking a road, thereby not only improving the detection efficiency, but also avoiding road blockage caused by blocking the road and greatly reducing the labor cost.
Description
technical field [0001] The invention relates to the field of motor vehicle exhaust measurement, in particular to a method and system for measuring Ringelmann blackness of motor vehicle exhaust. Background technique [0002] The detection methods of motor vehicle exhaust pollutants include contact detection method and traditional remote sensing detection method. Due to the limitations of equipment and test conditions, these two methods are not efficient in on-site detection, need to block the occupied roads, and the vehicles are not in normal driving state, which cannot effectively reflect the real exhaust pollution of the vehicles in use. Contents of the invention [0003] In view of this, the present invention provides a method for measuring the Ringelmann blackness of motor vehicle exhaust on the one hand, which can detect the Ringelmann blackness of motor vehicle exhaust during vehicle driving, without blocking the road, and can respond more effectively The pollution o...
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IPC IPC(8): G01N21/17G06T7/00
CPCG01N21/17G01N2021/1765G06T7/0002G06T2207/10016G06T2207/30252
Inventor 徐德伟黄冬梅孔繁国邓杰成张瑞秋
Owner 佛山市南海区环境保护监测站