Method, device and system for obtaining vehicle three-dimensional outline

Abstract

The invention discloses a method, a device and a system for obtaining a vehicle three-dimensional outline. In the method for obtaining the vehicle three-dimensional outline, scanning surfaces of first sets of laser radars are vertical to the moving direction of vehicles, and second sets of laser radars are parallel. The method for obtaining vehicle three-dimensional outline comprises the following steps: conducting multiple times measurement when vehicles pass; obtaining first image data of a current latest frame of the first set of laser radars in each measurement and obtaining two-dimensional coordinate information of outline points of cross sections of the vehicles; obtaining second image data of a current latest frame of the second set of laser radars and obtaining coordinate information of the outline points in the moving direction of the vehicles; then obtaining three-dimensional coordinate information of the outline points of the cross sections according to the two-dimensional coordinate information and the coordinate information of the outline points in the moving direction of the vehicles; lastly conducting interpolation treatment on the three-dimensional information of the outline points of a plurality of cross sections of multiple times measurement and conducting three-dimensional outlines of the vehicles. According to the method for obtaining the vehicle three-dimensional outline, accurate three-dimensional outline data of the vehicles can be obtained.

Description

technical field [0001] The invention relates to the field of measurement, in particular to a method, device and system for acquiring a three-dimensional profile of a vehicle. Background technique [0002] In the road transportation industry, illegal modification of vehicles such as over-length, over-width, and over-height often occurs. Such over-limit transportation of vehicles often directly leads to overloading, which easily leads to problems such as road traffic accidents and early damage to road facilities. At present, the country also has corresponding laws and regulations that clearly stipulate that the structure of the vehicle must not be arbitrarily modified, and it is strictly forbidden to exceed the limit. The length, width, and height of the load must not violate the loading requirements. Important content of parameters and operation safety inspection. [0003] At present, the measuring instruments commonly used by my country's automobile inspection institutions ...

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Problems solved by technology

[0005] In the process of implementing the present invention, the inventor found that this solution has at least the following disadvantages: the camera needs to take images in different orientations and then reconstruct a 3D object from the two captured 2D images, which requires harsh lighting conditions, low measurement accuracy, and reliable poor stability

[0007] In the process of implementing the present invention, the inventor found that although the solution solved the problems of harsh lighting conditions, low measurement accuracy, and poor reliability and stability, it had the advantages of non-contact, strong real-time performance, strong anti-interference ability, and high precision. But there are also the following disadvantages: all kinds of laser curtains used in this scheme are dedicated to measuring small-sized workpieces, and the measuring range is small. It is not suitable for larger objects such as vehicles, and the three-dimensional contour data of vehicles cannot be obtained.

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