A coded laser transceiver device, distance measuring device and laser radar system

Abstract

The present invention provides a pulse-coded laser transceiver, a ranging device, and a laser radar system. The device includes: a coding unit for generating a first coded signal; a laser pulse transmitting unit, based on the first coded signal, transmits a the first encoded laser pulse sequence; the laser pulse receiving unit is used to receive the echo of the laser pulse sequence, and judge whether the second encoded signal of the echo of the laser pulse sequence is the same as the first encoded signal; When an encoded signal is the same as the second encoded signal, the echo of the laser pulse sequence is used as the echo signal of the encoded laser pulse sequence.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a coded laser transmitting and receiving method, device and laser radar system. Background technique [0002] Long-range lidar can be used for distance measurement. It is usually based on the direct time-of-flight method, that is, by emitting a laser pulse with a narrow width but high peak power, and measuring the time of light flight back and forth between the pulsed light and the obstacle. [0003] However, in the same measurement range, there are multiple laser radars working at the same time, for example, when multiple laser radars are installed on a car, or when multiple vehicles equipped with laser radars are close The measurement principle of radar is based on measuring the time-of-flight of emitted laser pulses. If each laser radar cannot determine whether the received light pulses are sent by itself, then there is a certain probability that when receiving light puls...

AI Technical Summary

Problems solved by technology

[0003] However, in the same measurement range, there are multiple laser radars working at the same time, for example, when multiple laser radars are installed on a car, or when multiple vehicles equipped with laser radars are close The measurement principle of radar is based on measuring the time-of-flight of emitted laser pulses. If each laser radar cannot determine whether the received light pulses are sent by itself, then there is a certain probability that when receiving light pulses from other radars, it will also It is judged as an echo signal, which leads to an error in the ranging result

When multiple laser radars work at the same time, the problem of mutual interference between different laser radars has become one of the bottlenecks restricting its development

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