Continuous vehicle length measuring system based on single-line laser radar and measuring method thereof

Abstract

The invention discloses a continuous vehicle length measuring system based on single-line laser radars and a measuring method thereof.The continuous vehicle length measuring system comprises three single-line laser radars, two width and height radars (1) are arranged on a width and height radar portal frame (3), the continuous vehicle length measuring system based on the single-line laser radars is used, the width and height radars (1) judge whether a vehicle enters or leaves the width and height radar portal frame (3), and the width and height radars (1) determine whether the vehicle enters or leaves the width and height radar portal frame (3). The width and height radar (1) triggers a length measurement signal when a vehicle tail passes through the width and height radar portal (3), length measurement of two vehicles running at a small interval is achieved in cooperation with a software algorithm, real-time measurement of vehicle contours can be completed when the vehicles pass through a detection area, and contour data of the vehicles are obtained. The problems of inaccurate measurement data and missing detection caused by small vehicle intervals are solved, the difficulty that the vehicle length measurement is contour measurement due to the characteristic of existing laser linear propagation is avoided, the length measurement of continuously passing vehicles is realized, the following vehicles are not required to stop and wait during measurement, and the influence on road passage is reduced.

Description

technical field [0001] The invention belongs to the field of continuous vehicle length measurement, and in particular relates to a continuous vehicle length measurement system and a measurement method based on a single-line laser radar. Background technique [0002] Single-line LiDAR is a device that measures the target position (distance and angle) in the plane. It uses the principle of reflection on the surface of the object to measure the distance of the object, and the returned data is in the form of a point cloud. By using multiple single-line lidars to work together, the vehicle contour (length, width, height) can be measured in real time when the vehicle passes the detection area, and the contour data of the vehicle can be obtained, which is of great significance to the road management department. The measurement of the length of the vehicle is the difficulty of the contour measurement. Due to the characteristics of the straight line propagation of the laser, when the...

AI Technical Summary

Problems solved by technology

The measurement of vehicle length is a difficult point in contour measurement. Due to the characteristics of straight-line laser propagation, when the distance between two vehicles driving in the front and rear is very small, the front of the rear vehicle will be blocked by the front vehicle, and the vehicle will be regarded as a vehicle. , resulting in inaccurate measurement data and missed detection

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