Title:
SPREAD SPECTRUM MODULATION-BASED LASER RANGING SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2020/182217
Kind Code:
A1
Abstract:
A spread spectrum modulation-based laser ranging system and method. The system comprises: an FPGA (100), for generating a high-frequency clock, using the high-frequency clock to generate a pseudo random sequence code by driving, performing frequency division processing on the high-frequency clock to obtain a high-frequency periodic code, and using the pseudo random sequence code and the high-frequency periodic code to modulate a low-frequency data code to obtain a modulation signal; a laser emitting module (200), for modulating a laser signal according to the modulation signal to obtain a modulated optical signal, and emitting the modulated optical signal to a target to be detected; a laser receiving module (300), for receiving an echo optical signal reflected by said target, and converting the echo optical signal into a digital sequence. The FPGA (100) is further used to determine a distance between the system and said target according to the digital sequence, the pseudo random sequence and the high-frequency periodic code. The system and method implement laser ranging satisfying high speed, high precision and long range.
Inventors:
ZHANG GAOFEI (CN)
WANG JUNYA (CN)
YOU ZHENG (CN)
WANG JUNYA (CN)
YOU ZHENG (CN)
Application Number:
PCT/CN2020/079333
Publication Date:
September 17, 2020
Filing Date:
March 13, 2020
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
G01S17/32
Foreign References:
| CN109884654A | 2019-06-14 | |||
| CN105738913A | 2016-07-06 | |||
| CN102798866A | 2012-11-28 | |||
| CN105652282A | 2016-06-08 | |||
| CN106054204A | 2016-10-26 | |||
| CN105629258A | 2016-06-01 | |||
| CN107300705A | 2017-10-27 | |||
| US6219596B1 | 2001-04-17 |
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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