Laser radar and vehicle

Abstract

The invention discloses a laser radar and a vehicle. The laser radar comprises a control unit, a first receiving circuit, a second receiving circuit, a first laser generator, a light splitter, and atleast one second laser generator. The first laser generator is used for transmitting a first laser beam. The light splitter is sued for splitting the first laser beam into a reference beam and a firstranging beam, sending the reference beam to the first receiving circuit, and transmitting the first ranging beam to a measured object. The at least one second laser generator is used for transmittinga second ranging beam to the measured object. The first receiving circuit is configured to convert the reference beam into a first electric signal; the second receiving circuit is configured to convert the first ranging beam or the second ranging beam that is reflected by the measured object into a second electric signal; and the control unit calculates a distance between the laser radar and themeasured object based on a time difference between the received first electric signal and second electric signal. Therefore, a technical problem of short detection distance of the related multi-azimuth ranging radar is solved.

Description

technical field [0001] The present disclosure relates to the field of radar ranging, and in particular, to a laser radar and a vehicle. Background technique [0002] In related technologies, the main methods of low-cost vehicle-mounted lidar to realize three-direction measurement include: using a beam-splitting optical lens to split a single laser beam into three laser beams to realize three-direction measurement. The three laser beams are projected in different directions forward according to the decomposition angle of the beam splitting lens, so as to realize the measurement of three azimuth angles and improve the detection range. [0003] The technical shortcomings of the above-mentioned existing low-cost vehicle-mounted lidar that realizes three orientations mainly include: the projection distance is limited, generally more than ten meters away. The reason for the short ranging distance is that after a single laser beam is divided into three beams by the beam splitter o...

AI Technical Summary

Problems solved by technology

[0003] The technical shortcomings of the above-mentioned existing low-cost vehicle-mounted lidar that realizes three directions mainly include: the projection distance is limited, generally more than ten meters away

The reason for the short ranging distance is that after a single laser beam is divided into three laser beams by the beam splitting optical lens, the emission power of each split laser beam is reduced, and the detection distance is closely related to the emission power. The greater the power, the longer the detection distance. Therefore, the power of the beam splitting laser is reduced and the overall effective detection distance is shortened.

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