Vehicle outline dimension and wheel base dynamic measurement method and system

Abstract

The invention provides a vehicle outline dimension and wheel base dynamic measurement method and system. The method comprises the following steps: acquiring the vehicle dimension data of different scanning surfaces through a plurality of two-dimensional laser scanners; establishing a space rectangular coordinate system, processing the two-dimensional scanning data obtained by scanning to obtain the three-dimensional outline coordinate data of the detection vehicle; and processing the three-dimensional outline coordinate data to obtain the length-width-height information and wheelbase parameters for detecting the outline dimension of the vehicle. The invention further provides a vehicle outline dimension and wheel base dynamic measurement system in the running process, and the system includes a first scanning unit, a second scanning unit, a data processing system and a control module. The system has the advantages of being high in detection precision, high in response speed, low in system cost, and convenient to maintain.

Description

technical field [0001] The invention relates to the field of traffic measurement, in particular to a method and system for measuring vehicle outline dimensions used by public security vehicle management offices, vehicle inspection stations and other departments. Background technique [0002] At present, in order to increase the transport load, some passenger and freight transport vehicles are reinforced and modified without authorization, which seriously violates the safety standards for the use of vehicles. At the same time, it will shorten the life of roads and bridges and pose a threat to drivers and passengers. All public security vehicle management offices and motor vehicle monitoring stations must strictly inspect the dimensions of newly registered vehicles and vehicles in use. [0003] In the overrun detection of vehicles, the common methods are infrared digital light curtain method, three-dimensional laser ranging sensor method, vision-based measurement method and tw...

AI Technical Summary

Problems solved by technology

The infrared digital light curtain method has a simple measurement principle and low cost, but the test system has a complex structure, a large number of devices, and it is difficult to maintain when a fault occurs; the three-dimensional laser ranging sensor method has high equipment costs, and the vehicle needs to pass at a low speed to obtain a small error. data, the measurement time is long, and it is difficult to adapt to the fast-paced detection beat; the measurement method based on machine vision is easily affected by image distortion, and is prone to measurement errors

The traditional two-dimensional laser scanning sensor method usually uses two two-dimensional laser scanners installed on both sides of the detection lane to obtain vehicle width and height cross-section information, and then installs a two-dimensional laser scanner that scans along the driving direction of the vehicle above the lane to obtain vehicle information. Traveling information and car length; however, this method has high requirements for the installation position of each scanner. The scanners are installed at high places, which is difficult to install and debug. Generally, they need to be installed on the gantry, which is not very adaptable to the site. ; If there is a small angle between the direction of the car and the direction of the road, there will be some errors in the length and width data measured by this method

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