Laser pulse sequence generating method, device and laser radar system
A laser pulse sequence and laser pulse technology are applied in the fields of laser pulse sequence generation methods, lidar systems, and devices, and can solve the problems of burning laser tubes and reducing laser power, reducing the luminous frequency, solving the measurement distance, and improving the luminous resolution. rate effect
Active Publication Date: 2019-07-02
BEIJING WANJI TECH
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[0004] However, after the MEMS galvanometer is applied to the lidar, it is necessary to equip a high-frequency laser emitter. Due to the characteristics of the laser drive itself, when the laser emitter emits light at a high frequency, the laser power will drop, or even Burning out the laser tube of the laser transmitter
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[0080] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0081] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances ...
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The invention provides a laser pulse sequence generating method, device and a laser radar system. The method comprises steps: first vibration data of a MEMS (micro electro mechanical system) galvanometer are calculated and obtained through a fitting formula, wherein the first vibration data comprise numerical values of first vibration angles and first vibration time points in one-to-one correspondence obtained in a preset period; and according to the preset vibration period of the MEMS galvanometer and the first vibration data, one or more laser pulse sequences can be generated. While an expected scanning frequency is ensured, the illumination resolution of a laser emitter can also be improved, the illumination frequency of the laser emitter can also be reduced, and the problem that the existing laser radar scanning system cannot increase the measurement distance as the illumination frequency is too high can be solved.
Description
technical field [0001] The invention relates to the technical field of laser radar, in particular to a method and device for generating a laser pulse sequence and a laser radar system. Background technique [0002] With the continuous development of laser detection technology, the demand for high-sweep frequency, high-resolution, and small-volume lidar continues to increase, and the requirements for the space size of the laser system are also getting higher and higher. The traditional scanning lidar is mainly implemented by mechanical motors, which have the problems of large size and limited lifespan. In addition, the motor-based lidar is limited by factors such as the speed of the motor and the resolution of the code disc, so it cannot meet the requirements of high frequency scanning. [0003] At present, with the development of Micro-Electro-Mechanical System (MEMS) technology, the advantages of a new type of MEMS vibrating mirror are small size, low cost, and low power c...
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IPC IPC(8): G01S17/02G01S7/483
CPCG01S7/483G01S17/02
Inventor 李媛媛李军建王泮义王庆飞
Owner BEIJING WANJI TECH