US 11,747,474 B2
Systems and methods for laser distance measurement
Long Luo, Shenzhen (CN); and Zhi Chou, Shenzhen (CN)
Assigned to SHENZHEN MILESEEY TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed by SHENZHEN MILESEEY TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed on Jan. 2, 2020, as Appl. No. 16/732,383.
Claims priority of application No. 201911124059.0 (CN), filed on Nov. 18, 2019; and application No. 201911270451.6 (CN), filed on Dec. 12, 2019.
Prior Publication US 2021/0149049 A1, May 20, 2021
Int. Cl. G01C 3/08 (2006.01); G01S 17/36 (2006.01); G01S 17/26 (2020.01)
CPC G01S 17/36 (2013.01) [G01S 17/26 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A method for laser distance measurement, comprising:
obtaining, from a control circuit, a synchronization signal;
generating, by at least one signal generator, a first periodic signal, a second periodic signal, and a third periodic signal based on the synchronization signal;
emitting, by a laser emitting device, a laser beam toward a target, the laser beam being generated under a modulation of the first periodic signal;
generating, by an optical detector, a measurement signal in response to a signal mixing of the second periodic signal and a reflected laser beam from the target; and
determining a distance to the target based on the measurement signal and the phase of third periodic signal.