Measuring grating-based device and method for detecting illegal loading of transport vehicles

Abstract

The invention discloses a device and a method for generating a parallel optical path in a vertical direction. The device comprises a laser source, a total reflector and an oil immersion lens, wherein the laser source and the total reflector are arranged correspondingly; and the oil immersion lens is arranged below the reflector. In the method, the laser source is used to emit horizontal incident laser, the laser is reflected by the reflector and vertically projected onto the surface of the oil immersion lens, and finally vertical reflected laser is returned; and on a long optical path, lens paper is used to ensure that the incident laser and the reflected laser coincide completely. In the invention, an optical path which is strictly vertical or parallel to the ground surface can be obtained by using the optical path. The method and the device can be used for measuring the depth of parallelism of a large-area experiment platform in a laboratory and used for ensuring the verticality of high-buildings to the ground surface in field experiments.

Description

technical field [0001] The invention relates to a detection of illegal loading of a transport vehicle based on a measurement grating, and belongs to the technical field of vehicle electronic measurement and detection. Background technique [0002] The commonly used methods for vehicle shape detection technology are based on image processing and two-dimensional laser scanning. [0003] Image-based processing methods are simple in principle, mature in technology and low in cost. However, this method has high requirements on the on-site environment, such as requiring clear images, and in order to use the image comparison algorithm, the vehicle must be photographed at a designated location. But in some outdoor occasions, it is difficult to meet the above two requirements, such as ports, airports, construction sites, etc. Changes in the weather can easily reduce the quality of the pictures taken; it is difficult to control the running track of the transport vehicle, which leads...

AI Technical Summary

Problems solved by technology

However, this method has high requirements on the scene environment, such as requiring clear images, and in order to use the image comparison algorithm, the vehicle must be photographed at a specified location

But in some outdoor occasions, it is difficult to meet the above two requirements, such as ports, airports, construction sites, etc.

Changes in the weather can easily reduce the quality of the pictures taken; it is difficult to control the running track of the transport vehicle, which leads to the deviation of the shape of the vehicle in the picture, which affects the accuracy of judgment

[0004] Shape detection based on two-dimensional laser scanning, the cost of the instrument is high, and the software is complicated to write, and the scope of promotion is small

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