Light curtain-based vehicle size automatic measuring system and measuring method thereof

Abstract

The invention relates to a light curtain-based vehicle size automatic measuring system and a measuring method thereof. The system consists of a measuring host, a signal acquisition device and a light curtain sensor array which are connected, wherein the light curtain sensor array is a three-dimensional structure which consists of a height measuring light curtain sensor, a width measuring light curtain sensor and a length measuring light curtain sensor; output ends of the height measuring light curtain sensor, the width measuring light curtain sensor and the length measuring light curtain sensor are connected with the signal acquisition device; and after a detection signal transmitted by the light curtain sensor array is received by the measuring host, the height, the width and the length of a vehicle to be measured are calculated by the measuring host. The system is rational in design; an accurate measuring function of the vehicle size is realized; the problem of error in image contour dimension caused by the fact that a camera screenshot is not in the same plane as a land mark and a vertical mark existing in a camera image photograph measuring method is solved; the measuring accuracy and stability are improved; and all the degree of difficulty for handling, the anti-interference capacity and the maintainability are dramatically improved.

Description

technical field [0001] The invention relates to a vehicle size detection system, in particular to a light curtain-based automatic vehicle size measurement system and a measurement method thereof. Background technique [0002] The development of the automobile industry has greatly promoted the development of the social economy, but it has also brought many traffic problems. Among the traffic accidents that occur frequently every year, the proportion of the following traffic accidents caused by the exterior size of the vehicle is constantly increasing: Some vehicle users who are used for passenger / freight use increase the size of the vehicle by modifying the size of the vehicle in order to obtain greater economic benefits. Volume, to achieve the purpose of increasing the one-time transportation of vehicles and reducing transportation costs. This measure seriously violates the safety standards for vehicle use. Since the cargo reloaded by vehicles with super-large dimensions is ...

AI Technical Summary

Problems solved by technology

[0005] In summary, there are the following problems in the method of using the camera to capture images and then measure the vehicle's external dimensions: 1. When the method of measuring markers is used for measurement, since the ground markers or facade markers are not in the same plane as the screenshot of the captured image , resulting in errors in image dimensions; 2. Due to the limitation of the camera's best viewing angle and shooting range, the captured images often have errors; 3. When using ground reference objects for measurement, due to the lack of clear reference objects as the basis for measuring vehicle dimensions Parameter correction makes the image processing and analysis process complicated, thus increasing the difficulty of measurement

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