US 12,248,103 B2
System and method for lidar defogging
Tzu-Hsien Sang, Hsinchu (TW); Sung-You Tsai, New Taipei (TW); and Tsung-Po Yu, Taichung (TW)
Assigned to NATIONAL YANG MING CHIAO TUNG UNIVERSITY, Hsinchu (TW)
Filed by National Yang Ming Chiao Tung University, Hsinchu (TW)
Filed on Mar. 26, 2021, as Appl. No. 17/213,681.
Claims priority of application No. 109110394 (TW), filed on Mar. 27, 2020.
Prior Publication US 2021/0302554 A1, Sep. 30, 2021
Int. Cl. G01S 7/497 (2006.01); G01S 7/48 (2006.01); G01S 7/4861 (2020.01); G06N 20/00 (2019.01)
CPC G01S 7/497 (2013.01) [G01S 7/4808 (2013.01); G01S 7/4861 (2013.01); G06N 20/00 (2019.01); G01S 2007/4977 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A LiDAR defogging system, comprising:
a transmitter configured to emit a detection signal toward a field of view of the LiDAR defogging system;
a detector configured to receive an echo signal reflected from an object in the field of view of the LiDAR defogging system; and
an instrument configured to:
generate a first histogram based on the detection signal and the echo signal, wherein the x-axis of the first histogram represents as at least one time slot between the time for emitting the detection signal and the time for receiving the echo signal, and the y-axis of the first histogram represents as energy information of the echo signal;
determine a concentration of fog between the detector and the object by comparing the first histogram and a second histogram generated by collecting blank channel information, wherein the blank channel information is derived by signal reflected from the fog; and
remove an interference of the fog from the echo signal according to the concentration of the fog.