Automobile trafficability parameter measuring method

Abstract

The invention discloses an automobile trafficability parameter measuring method, which comprises the following steps of: parking a to-be-measured automobile on a horizontal supporting device, keeping a steering wheel to have no turning angle, and performing 3D point cloud scanning on front tires and rear tires of the automobile, a lifting supporting plane and the surface of the bottom of the automobile by using a three-dimensional laser scanner; importing the obtained point cloud of the front tire and the rear tire of the vehicle, the point cloud of the lifting support plane and the point cloud of the bottom of the vehicle body into software; determining a central plane which is perpendicular to the vehicle body bottom point cloud and enables the vehicle body bottom point cloud to be bilaterally symmetrical along the length direction of the vehicle body bottom point cloud; performing plane fitting processing on the lifting support plane point cloud, and taking a plane generated by fitting as a ground plane; determining and measuring an approach angle, a departure angle and a longitudinal passing angle; according to the digitalized automobile trafficability parameter measurement method, manual measurement is not needed during automobile trafficability parameter angle measurement, and the measurement efficiency and precision are improved.

Description

technical field [0001] The invention relates to the technical field of automobile measurement, in particular to a method for measuring the passability parameters of automobiles. Background technique [0002] The vehicle passability parameters mainly include approach angle, departure angle, and longitudinal passing angle, which represent the off-road passing ability of the car on non-paved roads. The larger the angle, the better the maneuverability of the car. [0003] The approach angle is defined as the maximum acute angle between a plane cut to the outer edge of a statically loaded front tire and perpendicular to the Y plane and the ground, and any rigid components fixed to the vehicle in front of the front axle are above this plane; departure The angle is defined as the maximum acute angle between the outer edge of the tire of the statically loaded rear tire and the plane perpendicular to the Y plane and the ground. Any rigid components fixed to the vehicle behind the rea...

AI Technical Summary

Problems solved by technology

[0005] The invention patent with the publication number CN112050773A discloses a measuring device and its measuring method for the longitudinal passing angle of an automobile. The patent uses a mechanical measuring device to fit the tire, and measures the angle on the measuring device to obtain Longitudinal passing angle, but the range of the vehicle bottom is large, and the apex position of the longitudinal passing angle is manually positioned through the sliding of the device, which cannot guarantee that the measured longitudinal passing angle is the smallest acute angle, and there are manual measurement errors during operation; the publication number is CN108725449A The invention patent discloses a method and system for calculating the longitudinal passing angle of a car. The patent requires a plan based on the car model, but the key first step, how to construct the plan of the car model, has not been involved, and it exists in practicability Insufficient, using the "approximation method" to measure the longitudinal passing angle, there are many steps and there are errors

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