公开(公告)号：US20200300692A1

公开(公告)日：2020-09-24

申请号：US16816698

申请日：2020-03-12

Applicant: SICK AG

Inventor： Michael ENGLER ,  Joachim KRAEMER ,  Markus HAMMES ,  Ino GEISEMEYER

IPC: G01J1/04

Abstract: An optical scanner comprises a light transmitter for transmitting a light beam; a beam deflection unit that is configured to deflect the transmitted light beam in a periodically varying manner with a predefined period duration in order to scan a detection zone; a light receiver for receiving reflected light; and an electronic control device for controlling the beam deflection unit. The electronic control device is configured to automatically increase or decrease the period duration by a difference amount with respect to a nominal value before or during the operation of the optical scanner in order to counteract crosstalk between the optical scanner and a further optical scanner.

公开(公告)号：US20210247503A1

公开(公告)日：2021-08-12

申请号：US17169019

申请日：2021-02-05

Applicant: SICK AG

Inventor： Joachim KRÄMER ,  Markus HAMMES ,  Ino GEISEMEYER

IPC: G01S7/497 ,  G01S7/481 ,  G01S17/08 ,  G01S17/04

Abstract: A safety laser scanner (10) for detecting objects in a monitored zone (20) is provided that has a light transmitter (12) for transmitting a scan beam (16), a movable deflection unit (18) for the periodic scanning of the monitored zone (20) by the scan beam (16), a light receiver (26) for generating a received signal from the scan beam (22) remitted by the objects, a front screen (38), and a control and evaluation unit (32) that is configured to acquire information on the objects in the monitored zone (20) from the received signal and to recognize an impaired light permeability of the front screen (38) in a front screen monitoring by evaluating a front screen reflection beam (54) that is generated from the scan beam (16) by reflection at the front screen (38), At least one light deflection unit (56, 58) is provided in the optical path of the front screen reflection beam (54) that guides the front screen reflection beam (54) to the front screen (38) again in a region (60) to be tested so that a twice-reflected front screen reflection beam (62) is produced by reflection at the region (60) to be tested.