US 12,105,223 B2
Optoelectronic sensor and method for detecting objects
Michael Kerp, Waldkirch (DE); and Markus Mössner, Waldkirch (DE)
Assigned to SICK AG, Waldkirch (DE)
Filed by SICK AG, Waldkirch (DE)
Filed on Jan. 7, 2021, as Appl. No. 17/143,668.
Claims priority of application No. 102020100452.4 (DE), filed on Jan. 10, 2020.
Prior Publication US 2021/0215802 A1, Jul. 15, 2021
Int. Cl. G01S 7/48 (2006.01); G01S 7/481 (2006.01); G01S 17/42 (2006.01); G08C 17/02 (2006.01)
CPC G01S 7/4817 (2013.01) [G01S 7/4814 (2013.01); G01S 17/42 (2013.01); G08C 17/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An optoelectronic sensor for the detection of objects in a monitored zone, the optoelectronic sensor comprising:
a light transmitter for transmitting a light beam;
a light receiver for generating a received signal from the light beam remitted by the objects in the monitored zone;
a control and evaluation unit configured for detection of information on the objects with reference to the received signal;
a base unit;
a scanning unit movable with respect to the base unit for periodic scanning of the monitored zone; and
a drive having a hollow shaft for moving the scanning unit,
wherein the scanning unit comprises a first data transmission unit and the base unit comprises a second data transmission unit to exchange data wirelessly between the base unit and the scanning unit through the hollow shaft,
wherein the first data transmission unit and the second data transmission unit are configured as microwave units for data exchange by means of microwave signals,
wherein at least one of the first data transmission unit and the second data transmission unit is configured for the transmission and/or reception of linearly polarized microwave signals, and
wherein at least one polarizer for conversion of the linearly polarized microwave signals into circularly polarized microwave signals is arranged in a communication path between the first and second data transmission units.