Laser ranging method and system based on single-line laser scanning device

Abstract

The invention discloses a laser ranging method and system based on a single-line laser scanning device, wherein the method comprises: acquiring internal setting parameters of a single-line laser scanning device, wherein the internal setting parameters include ranging reference parameters and verification parameters; when scanning and ranging are performed after leaving the factory, averaging the time information of a return path of each scanning position obtained in real time, and updating the ranging reference parameters according to a processing result to obtain a ranging reference mean value; and using a calibration formula to calibrate original time data of a scan target according to the ranging reference mean value and the verification parameters to obtain actual distance data of ranging. The method re-measures the ranging reference parameters when scanning and ranging after leaving the factory, and updates the internal setting parameters with the measurement result as a standard,which not only avoids complicated algorithms, but also avoids the drift phenomenon of ranging data precision caused by performance of the device and other reasons due to environmental factors or long-time operation, thereby improving the accuracy of final ranging.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a laser ranging method and system based on a single-line laser scanning device. Background technique [0002] The laser scanning device is based on laser ranging as the main technical basis, and at the same time, it realizes two-dimensional scanning measurement through the rotation of the motor. Laser scanning devices are successfully used in many fields, such as industrial surveying, topographical surveying, cultural relics protection, urban modeling, parallel inspection, reverse engineering and virtual reality, etc. The internal integration of the laser scanning device includes a laser pulse emitting unit, a laser pulse receiving unit, a time measurement unit, a motor rotation unit, and a control and processing unit; after the pulsed laser emitted by the laser pulse emitting unit hits the target, it returns to the target through diffuse reflection. The receiving unit uses...

AI Technical Summary

Problems solved by technology

This method has the following defects. The traditional calibration method mainly uses external calibration devices, which put forward higher requirements for calibration references, calibration devices, calibration sites, etc.; or requires the use of various complex calibration algorithms to complete the calibration of relevant parameters, which is time-consuming and laborious; In addition, after the calibration parameters are set before leaving the factory, in the subsequent use process, the relevant calibration parameters cannot be adjusted in real time according to the performance status changes of the laser scanning device, which will affect the distance measurement accuracy.

Images