A solid-state lidar system
A laser radar and solid-state technology, applied in the direction of radio wave measurement systems, instruments, measuring devices, etc., can solve the problems of stability and service life, the price increase of mechanical laser radar, and low production capacity, etc., and achieve simple structure and easy FM, low cost effect
Active Publication Date: 2021-10-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
The traditional mechanical lidar scans through a high-speed rotating mechanical system. There are certain problems in its stability and life, and the low production capacity caused by the consistency of mass production also further increases the price of mechanical lidar.
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.
[0033] As mentioned in the background, traditional laser radars have a series of problems such as short life, poor stability, large volume, and high power consumption. In this regard, the inventors found that the reason for the above-mentioned technical problems is that the traditional laser radar uses a mechanical system, because the high-speed mechanical system will affect the stability and life of the device, so there are the above-mentioned unavoidable prob...
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The invention discloses a solid-state laser radar system, comprising: a laser for generating a laser beam; an optical phased array chip for receiving the laser beam and outputting a scanning beam, the scanning beam includes a detection beam and a local oscillator beam; used to control the optical phased array The chip outputs the probe beam and the local oscillator beam with the preset phase, and the drive device that controls the optical phased array chip to output the probe beam with the preset scanning direction; receives the echo beam and the local oscillator beam and mixes them into a mixer for detecting analog signals The echo beam is the echo signal after the detection beam detects the target to be measured; the photodetector used to convert the detection analog signal into the detection analog electrical signal; the modulus used to convert the detection analog electrical signal into the detection digital signal A converter; a frequency discrimination device used to perform frequency discrimination on the detection digital signal to obtain distance data from the target to be measured. The solid-state lidar system has the advantages of long operating distance, high stability, easy frequency modulation, low driving power consumption, and simple structure.
Description
technical field [0001] The present invention relates to the technical field of laser radar, and more specifically, relates to a solid-state laser radar system. Background technique [0002] Lidar technology is a new product that combines traditional radar technology with modern laser technology. It makes full use of the characteristics of small emission angle, energy concentration and high coherence of laser, which makes laser radar have a series of unique advantages: It has the advantages of high angular resolution, high distance resolution, high speed resolution, wide range of speed measurement, can obtain multiple images of the target, and strong anti-interference ability. The traditional mechanical lidar scans through a high-speed rotating mechanical system. There are certain problems in its stability and lifespan. The low production capacity caused by the consistency of mass production also further increases the price of mechanical lidar. Therefore, the solid-state lid...
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IPC IPC(8): G01S7/481G01S17/88
CPCG01S7/4817G01S17/88
Inventor 张明时王玉冰秦莉王立军
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI