US 12,468,021 B2
Method for detecting a defocusing of a LIDAR sensor, and lidar sensor
Juan Carlos Garza Fernandez, Stuttgart (DE); and Patrick Volz, Stuttgart (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Dec. 14, 2023, as Appl. No. 18/539,776.
Claims priority of application No. 10 2022 214 040.0 (DE), filed on Dec. 20, 2022.
Prior Publication US 2024/0201347 A1, Jun. 20, 2024
Int. Cl. G01S 7/497 (2006.01); B60S 1/56 (2006.01); G01S 7/481 (2006.01); G01S 17/931 (2020.01)
CPC G01S 7/497 (2013.01) [G01S 7/4814 (2013.01); G01S 7/4816 (2013.01); G01S 17/931 (2020.01); B60S 1/56 (2013.01); G01S 2007/4977 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for detecting a defocusing of a LIDAR sensor, comprising the following steps:
emitting primary light in the form of a laser line into a field of view of the LIDAR sensor using at least one laser emitter unit of a transmitting unit of the LIDAR sensor for scanning the field of view;
receiving, using a matrix-shaped detector unit of a receiving unit, secondary light reflected and/or scattered by an object in the field of view, wherein the detector unit has a first reception area and a second reception area different from the first reception area;
determining, using an evaluation unit, a distance between the LIDAR sensor and an object in the field of view of the LIDAR sensor based on secondary light received in the first reception area; and
ascertaining, using an evaluation unit, information about an extent of the defocusing based on secondary light received in the second reception area;
wherein:
the first reception area is determined a calibration of the matrix-shaped detector unit;
the first reception area and the second reception area are separately activated for receiving secondary light; and
the second reception area is activated during individual scan recordings of several temporally consecutive scan recordings.