Pulse laser distance measurement system and method based on waveform time domain registration analysis

Abstract

The invention relates to a pulse laser distance measurement system and method based on waveform time domain registration analysis. The system comprises a software part and a hardware part, wherein the software part comprises a communication software body, a waveform time domain registration analysis algorithm, a multiple echo algorithm and a distance and reflectivity algorithm. The distance measurement method includes the steps that in a control circuit, a control signal is input, and pulses are sent to a laser emitter; if the selected emitter only emits one path of lasers, the lasers are emitted to a beam splitter through a collimating mirror and divided into two beams, one path of the lasers enters a detector a through an optical attenuator, and the other path of the lasers is emitted to a target through a convex lens; if the selected emitter emits two paths of the lasers, one path of the lasers directly enters the detector a, and the other path of the lasers is emitted to the target through the convex lens; target reflection lasers are emitted to a detector b through the convex lens and an optical filter, the detector b converts laser echoes into analog signals, the two paths of analog signals are converted into digital signals on an AD converter through an analog amplification circuit respectively, waveform time domain registration analysis is conducted in an analysis module, and then the distance measurement result is output by the control circuit.

Description

technical field [0001] The invention relates to a pulse laser ranging system and method, in particular to a pulse laser ranging system and method based on waveform time-domain registration analysis, belonging to the field of measuring instruments. Background technique [0002] The basic principle of pulse laser ranging is to actively emit pulse laser to the target, then detect the laser echo of the irradiated point on the target, measure the flight time of pulse laser, and obtain the distance from the target to the rangefinder. The ranging accuracy of pulsed laser ranging is determined by the measurement accuracy of laser time of flight. Because the pulsed laser is affected by the atmosphere and the scattering characteristics of the target, the laser echo has great differences in amplitude and shape, and the resulting time drift error makes it difficult to accurately determine the laser echo time. At present, there are four main methods for laser echo time identification: f...

AI Technical Summary

Problems solved by technology

This method has a simple circuit structure and is easy to implement, but it needs to measure the error compensation curve in advance, fit the error compensation curve or establish an error compensation table, which increases the complexity of the pulse laser ranging method

[0003] In recent years, the pulse laser ranging technology has made great progress, and many applications for the invention of the pulse laser ranging technology have been published in China, such as the pulse laser ranging method, the ranging method of the pulse laser range finder, and the pulse laser range measuring method. The method and device of distance, etc., they have the disadvantages of not having the function of detecting the reflectivity of the target and not having the function of multiple echo analysis

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