Method and device for improving laser radar ranging capability

Abstract

The invention provides a method and a device for improving a laser radar ranging capability. The method comprises the following steps that: obtaining the minimum interval of the laser emission units,which emit laser at the same time, of a laser radar; obtaining the minimum interval of the laser receiving units, which receive a laser echo signal at the same time, of the laser radar; and accordingto the minimum interval of the laser emission units, which emit laser at the same time, of the laser radar and the minimum interval of the laser receiving units, which receive the laser echo signal atthe same time, of the laser radar, configuring the working time sequence of each laser emission unit and each laser receiving unit in the laser radar to enable multiple paths of laser emitted from the laser radar to finish simultaneous ranging on a premise that the multiple paths of laser do not mutually interfere. By use of the method, the problem that the conventional 3D scanning type laser radar senor ranging capability is restricted by a laser ray number is solved, and in addition, an interference problem brought by simultaneous light emission is solved on the basis of a light path and alight emitting time sequence.

Description

technical field [0001] The invention relates to the technical field of laser radar ranging, in particular to a method and device for improving the ranging capability of laser radar. Background technique [0002] Lidar is a radar system that emits laser beams to detect characteristic quantities such as the position and speed of targets. In terms of working principle, the laser radar sends a detection signal to the target, and then compares the received echo signal reflected from the target with the transmitted signal, and after proper processing, the relevant information of the target can be obtained, such as target distance, The parameters such as azimuth, altitude, speed, attitude, and even shape can be used to detect, track and identify targets such as aircraft and missiles. Therefore, in lidar technology, the timing upper limit between the transmitted signal and the echo signal determines the The ranging capability of lidar. [0003] In the prior art, the ranging capabi...

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Problems solved by technology

[0004] Aiming at the defects in the prior art, the present invention provides a method and device for improving the ranging capability of laser radar. The present invention solves the problem that the ranging capability of conventional 3D scanning laser radar sensors is limited by the number of laser lines based on the principle of simultaneous light emission. This problem, and based on the optical path and structural design, avoids the problem of isolated path interference caused by simultaneous light emission, and simplifies the structure of the post-processing circuit

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