Data acquisition device for laser distance measurement, and its collecting flowchart

Abstract

The present invention combines laser pulse ranging method with data collection techniques. Said device includes transmitted wave input channel, echo input channel, triggering input channel, transmitted wave amplification unit, operating, echo amplification unit, triggering unit, transmitted wave analog-to-digital conversion unit, echo analog-to-digital conversion unit, control calculation and synchronization unit, memory, interface unit, system clock, and upper computer. Said process mainly includes: beginning, initialisation, self-checking, standby, command, collecting instructing, triggering signal, collecting transmitted wave signal, echo over threshold, calculation transition time, compression and storage data, and ending collection. Said invention is suitable for moving mode continue laser ranging, laser radar and conventional data collection application system.

Description

technical field [0001] The invention relates to laser ranging technology, in particular to a data acquisition device for laser ranging and its acquisition process. Background technique [0002] Weights and measures are important measurement standards in human life, and long-distance accurate measurement has always been the goal pursued by scientific and technological personnel. With the advancement of science and technology, people continue to invent new distance measurement methods; the advent of lasers provides new ideas for long-distance precise measurement. Due to the advantages of high brightness, good directionality, monochromaticity and coherence, laser has played an important role in long-distance measurement technology. [0003] There are two commonly used laser ranging methods: laser phase ranging and pulsed laser ranging. [0004] Laser phase ranging is achieved by modulating the intensity of light. Assuming that the laser intensity modulation frequency used fo...

AI Technical Summary

Problems solved by technology

[0013] ① Only the distance information can be obtained, and the features of the ground objects cannot be distinguished;

[0014] ② When there is no cooperative target, the ranging error is relatively large, and the ranging range is small, and to achieve accurate and long-distance measurement generally requires cooperative targets such as prisms;

[0015] ③The signal-to-noise ratio of the echo is small, and the detection failure rate is high;

[0016] ④ generally can not achieve continuous mobile measurement

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