公开(公告)号：US09810626B2

公开(公告)日：2017-11-07

申请号：US15092991

申请日：2016-04-07

Applicant: SICK AG

Inventor： Joachim Kramer ,  Michael Engler ,  Markus Hammes ,  Christof J. Meyer

IPC: G01N21/59 ,  G01S17/42 ,  G01S7/481 ,  G01S7/497 ,  G01D5/30 ,  G01M11/00

CPC classification number: G01N21/59 ,  G01D5/30 ,  G01M11/00 ,  G01N2201/06113 ,  G01N2201/1053 ,  G01S7/4817 ,  G01S7/497 ,  G01S17/42 ,  G01S2007/4975

Abstract: An optoelectronic sensor (10) for detecting objects in a monitored zone (20) is provided which has the following: a front screen (38); a light transmitter (12) for transmitting a light beam (16); a movable deflection unit (18) for the periodic sampling of the monitored zone (20) by the light beam (16); a light receiver (26) for generating a received signal from the light beam (22) remitted by the objects; at least one test light transmitter (42); at least one test light transmitter (42), at least one test light receiver (44) and at least one test light reflector (48) which span a test light path (46a-b) through the front screen (38); and an evaluation unit (32) which is configured to acquire pieces of 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) from a test light signal which the test light receiver (44) generates from test light which is transmitted from the test light transmitter (42) and which is reflected at the test light reflector (48). In this respect, the test light reflector (48) is arranged such that it moves along with the deflection unit (18).

公开(公告)号：US11118962B2

公开(公告)日：2021-09-14

申请号：US16816698

申请日：2020-03-12

Applicant: SICK AG

Inventor： Michael Engler ,  Joachim Kraemer ,  Markus Hammes ,  Ino Geisemeyer

IPC: G02B26/12 ,  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：US11592552B2

公开(公告)日：2023-02-28

申请号：US16704695

申请日：2019-12-05

Applicant: SICK AG

Inventor： Michael Engler ,  Joachim Krämer

IPC: G01S17/04 ,  G01S7/481 ,  G01S7/497 ,  G01S17/10

Abstract: An optoelectronic sensor, in particular a laser scanner, for detecting an object in a monitored zone is provided having a light transmitter for transmitting a light beam into the monitored zone; a light receiver for generating a received signal from the light beam remitted by the object; a moving deflection unit for a periodic deflection of the light beam to scan the monitored zone in the course of the movement; and having a control and evaluation unit that is configured to determine the time of flight between the transmission and reception of the light beam and to determine the distance from the object therefrom, wherein the sensor has a correction of the signal dynamics, i.e. of the relative reception power in dependence on the distance of the scanned object, The control and evaluation unit is here configured to correct the signal dynamics by adapting the sensitivity of the sensor.

公开(公告)号：US09477007B2

公开(公告)日：2016-10-25

申请号：US14055924

申请日：2013-10-17

Applicant: SICK AG

Inventor： Magnus Albert ,  Michael Engler ,  Joachim Kramer

IPC: G01V8/10 ,  G01S17/93 ,  G01S7/499

CPC classification number: G01V8/10 ,  G01S7/499 ,  G01S17/93

Abstract: A laser scanner, in particular a safety laser scanner, in accordance with the operating principle of the time of flight process, comprising a light transmission unit having at least one light transmitter for transmitting a polarized transmitted light beam into a monitored zone; a light reception unit having at least one light receiver for detecting the polarization component of the light reflected in the monitored zone being orthogonal to the polarization direction of the transmitted light beam, and/or the polarization component of the light reflected in the monitored zone being parallel to the polarization direction of the transmitted light beam, and for generating a received signal corresponding to the detected orthogonal polarization component and/or the detected parallel polarization component; and an evaluation unit configured to evaluate the time development of the detected orthogonal polarization component and/or of the detected parallel polarization component.

Abstract translation: 根据飞行过程的操作原理的激光扫描器，特别是安全激光扫描仪，包括具有至少一个光发射器的光传输单元，所述光发射器用于将偏振的透射光束传输到被监测的区域; 光接收单元，具有至少一个光接收器，用于检测在所监视的区域中反射的光的偏振分量正交于透射光束的偏振方向，和/或在监视区域中反射的光的偏振分量为 平行于透射光束的偏振方向，并且用于产生对应于检测到的正交偏振分量和/或检测到的平行偏振分量的接收信号; 以及评估单元，被配置为评估检测到的正交偏振分量和/或检测到的平行偏振分量的时间变化。

公开(公告)号：US09995820B2

公开(公告)日：2018-06-12

申请号：US14704213

申请日：2015-05-05

Applicant: SICK AG

Inventor： Fabian Jachmann ,  Michael Engler ,  Bernd Rothenberger ,  Thomas Dollmann

IPC: G01C3/08 ,  G01S7/486 ,  G01S17/08 ,  G01S7/487 ,  G01S17/10 ,  G01S17/42

CPC classification number: G01S7/4865 ,  G01S7/487 ,  G01S7/4873 ,  G01S17/08 ,  G01S17/10 ,  G01S17/42

Abstract: A distance-measuring sensor (10) is provided for detecting and determining the distance of objects (18) in a monitored zone comprising a transmitter (12) for transmitting transmitted pulses; a receiver (20) for generating a received signal from the transmitted pulses remitted in the monitored zone; a first comparator unit (36a) for digitizing the received signal with reference to a first threshold; and a control and evaluation unit (30) which is configured to transmit a plurality of transmitted pulses via the transmitter (12), to collect the received signals thereupon generated by the receiver (20) in a histogram and to determine a received time point from the histogram and thus to determine a measured value for the signal transit time from the sensor (10) to the object (18). In this respect, a second comparator unit (36b) is provided for digitizing the received signal with reference to a second threshold, wherein the first comparator unit (36a), the second comparator unit (36b) and the control and evaluation unit (30) are configured to acquire three digital states of a respective section of the received signal with reference to the first threshold and to weight the contributions of the section to the histogram in dependence on the digital state.