Circulating multi-pulse laser speed measuring radar and control method

Abstract

The invention discloses a circulating multi-pulse laser speed measuring radar and control method. A direct-current power source, an LED display screen and a control circuit are arranged. The direct-current power source provides direct-current power for all parts in the control circuit. The control circuit consists of a TA89C52 type single-chip microcomputer, a crystal oscillator, a phase-locked loop, an MAX7000B type on-line programmable logic counter, a laser trigger, a pulsed laser, a servo mechanism, a laser receiver, a signal amplifier, a lens I and a lens II. The MAX7000B type on-line programmable logic counter and the TA89C52 type single-chip microcomputer are used for controlling to realize circulating multi-pulse laser measurement. Because the number of laser pulses emitted circularly reaches an order of ten to the fifth power, the error caused by reaction time of an electronic device can be neglected based on the technical scheme of end-to-end-connection circulating multi-pulse laser ranging. The calculation shows that compared with the single-pulse way, the multi-pulse way enables the measurement error to be reduced. Therefore, the measurement error is reduced and the measurement precision is improved. The motion speed of the moving object can be measured rapidly and accurately and the application rang is extended.

Description

technical field [0001] The invention relates to a circulating multi-pulse laser speed-measuring radar and a control method, which relate to a circulating multi-pulse laser speed-measuring radar capable of accurately and quickly measuring the moving speed of a moving object. Background technique [0002] Most of the laser speed measuring radars that appear on the market currently have a single-pulse measurement principle. Single-pulse laser speed measurement uses a single pulse laser to measure a moving object, emits a pulse laser to the moving object, receives its echo, and calculates the speed of the object. The distance between the laser and the laser, after a short time interval, emits a pulsed laser to the moving object, receives its echo, calculates the second distance between the two, and then uses the vector triangle to calculate the distance between the two positions Divide this distance by the time interval between two pulsed lasers to get the moving speed of the me...

AI Technical Summary

Problems solved by technology

Due to the high speed of light, the round-trip time of the laser is very short, and the response time of the measuring instrument can reach the same level compared with the time for the laser to travel back and forth. Therefore, the measurement error of the pulse round-trip time in single-pulse laser measurement is relatively large. The distance measurement error will be large, and the distance error between two positions calculated by vector triangle is also large, so it is impossible to accurately measure the moving speed of the object, and its application range is limited to a certain extent

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