A multi-channel receiving lidar

Abstract

The invention provides a multi-path receiving laser radar, which comprises a target laser transmitter, a combined switch controller and a target detector, wherein the target laser transmitter determines a target transmitted pulse signal used for transmitting laser and transmits the laser according to a corresponding transmission time, a pulse signal transmission interval can be greater than a maximum round-trip flight time of the laser in each transmitted pulse signal included in a laser transmission repetition period signal, the pulse signal transmission interval can also be smaller than themaximum round-trip flight time of the laser, or at least two transmitted pulse signals are overlapped with each other; the combined switch controller acquires a laser sampler with the idle transmission time according to the transmission time corresponding to the target transmitted pulse signal, and selects a target laser sampler to be connected to the target detector and the target laser sampler which are corresponding to the target laser transmitter; and after the target detector transmits the reflected laser, the target detector transmits the reflected laser to the connected target laser sampler for sampling processing. According to the multi-path receiving laser radar, the detection performance of the multi-path receiving laser radar can be improved.

Description

technical field [0001] The present application relates to the technical field of radar, in particular, to a multi-channel receiving lidar. Background technique [0002] The existing multi-channel (multi-line) receiving laser radar adopts a single-send-single-reception architecture for laser emission and reception, such as figure 1 As shown, it includes a plurality of laser emitters 101 , a detector 102 corresponding to each laser emitter, an all-in-one switch controller 103 and a laser sampler 104 . After the laser light emitted by the laser emitter is reflected by the target object, the detector corresponding to the laser emitter detects the reflected laser light reflected by the target object, and the all-in-one switch controller controls the detector to connect with the laser sampler to The detected reflected laser light is input into the laser sampler for signal sampling processing, so as to perform subsequent processing on the sampled reflected laser light. Among them...

AI Technical Summary

Problems solved by technology

[0003] However, the existing multi-channel receiving laser radar needs a laser transmitter that emits laser light, and needs to wait for the detector corresponding to the laser emitter that is emitting laser light. After the detected reflected laser light is transmitted to the laser sampler, the laser light can be emitted. As a result, the time interval between the front and rear laser emission is longer, resulting in a lower point frequency of the multi-channel receiving laser radar, which limits the further improvement of the detection performance of the multi-channel receiving laser radar.

Images