Laser radar

Abstract

The invention discloses a laser radar. The laser radar comprises at least one laser emitting unit; the laser emitting unit comprises a plurality of emitting devices; each emitting device generates onepath of detection light; the multiple paths of detection light generated by the emitting devices are emitted in parallel to form an emergent light beam; and the emitting devices include a distance emitting device suitable to generate distance detection light, and a color emitting device suitable to generate color detection light. The laser radar is a color laser radar, and distance information and color information can be obtained at the same time; and the multiple paths of the generated detection light are emitted in parallel, so that the laser radar does not need to calibrate the positionsof different emitting devices, the difficulty of back end data processing can be effectively lowered, and the assembly complexity is lowered; and in addition, the laser radar can realize light beam path sharing without extra optical components, and can meet the development requirements of low cost, miniaturization and solid state.

Description

technical field [0001] The invention relates to the field of laser detection, in particular to a laser radar. Background technique [0002] Lidar is a commonly used ranging sensor, which has the characteristics of long detection distance, high resolution, and low environmental interference. It is widely used in intelligent robots, drones, unmanned driving and other fields. In recent years, with the rapid development of autonomous driving technology, lidar, as the core sensor of distance perception, has become indispensable. [0003] In the current vehicle-mounted lidar, whether it is a lidar with coherent transceiver technology or a lidar based on time-of-flight technology, the feedback signal only contains distance information. If each point can contain color information, it will be more conducive to object recognition. [0004] One of the current solutions is to add image sensors such as cameras on the basis of lidar. The problem is that the camera and lidar need to be c...

AI Technical Summary

Problems solved by technology

[0004] One of the current solutions is to add image sensors such as cameras on the basis of lidar. The problem is that the camera and lidar need to be calibrated

If the calibration is not accurate, or the position between the lidar and the camera deviates during use, there will be a mismatch between the point cloud and the image

And because two sensors are used, both need to be triggered synchronously, if there is an uncertain delay on either side, it will affect the result

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