Title:
FMCW LIDAR SYSTEM AND FMCW FREQUENCY SWEEP METHOD
Document Type and Number:
WIPO Patent Application WO/2024/011778
Kind Code:
A1
Abstract:
An FMCW LiDAR system and an FMCW frequency sweep method. The FMCW frequency sweep method comprises: acquiring a frequency sweep light beam, the frequency sweep light beam performing within a preset frequency-sweep distance measurement period n times of frequency increasing according to a preset frequency increasing slope and n times of frequency decreasing according to a preset frequency decreasing slope, n being a positive number, n≥2, the frequency sweep bandwidth of the frequency sweep light beam and a preset frequency sweep total bandwidth meeting the following relationship: f=fc/n, fc being the preset frequency sweep total bandwidth, and f being the frequency sweep bandwidth (S401); splitting the frequency sweep light beam into an emitted light beam and a local oscillator light beam, the frequency modulation waveform of the emitted light beam and the frequency modulation waveform of the local oscillator light beam being wholly identical (S403); emitting the emitted light beam, so that the emitted light beam is reflected after encountering an obstacle, so as to generate a reflected light beam (S405); and measuring a beat frequency between the local oscillator light beam and the reflected light beam, so as to measure the distance of the obstacle (S407).
Inventors:
ZHANG BANGHONG (CN)
SUN JIE (CN)
SUN TIANBO (CN)
SUN JIE (CN)
SUN TIANBO (CN)
Application Number:
PCT/CN2022/125557
Publication Date:
January 18, 2024
Filing Date:
October 17, 2022
Export Citation:
Assignee:
BEIJING MORELITE SEMICONDUCTOR CO LTD (CN)
International Classes:
G01S13/72; G01S7/491; G01S17/58
Foreign References:
| CN114879215A | 2022-08-09 | |||
| CN115166761A | 2022-10-11 | |||
| CN114152951A | 2022-03-08 | |||
| CN101128988A | 2008-02-20 | |||
| CN106959439A | 2017-07-18 | |||
| US20210132226A1 | 2021-05-06 | |||
| US20080100500A1 | 2008-05-01 | |||
| CN114114301A | 2022-03-01 | |||
| CN102680967A | 2012-09-19 | |||
| CN113253243A | 2021-08-13 |
Attorney, Agent or Firm:
BEIJING RUICHITONGCHENG INTELLECTUAL PROPERTY AGENCY OFFICE (CN)
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