Sick Ag

Joachim Krämer

Michael Engler

Markus Hammes

Stefan Mack

Jörg Sigmund

Magnus Albert

Christof J Meyer

Christoph Hofmann

Martin Wüstefeld

Olaf Henkel

Boris Baldischweiler

Ino Geisemeyer

Christiane Fillhardt

Max Böhme

Patrick Stein

Herr Jörg Sigmund

Dr Markus Hammes

Ralf Zimmermann

Michael Breindl

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

Safety laser scanner and method for front screen monitoring

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.

Sensor and method for detecting an object

An optoelectronic sensor () is provided for detecting object information from a monitored zone () having a light receiver (); a reception optics () associated with the light receiver () for generating a light spot on the light receiver (); and an evaluation unit () for generating the object information from a received signal of the light receiver (). In this respect, a manipulation unit () is provided to vary the reception optics (), the light receiver () and/or elements of the reception optics () such that the portion of the light spot that is incident on the light receiver () varies.

Optoelectronic sensor and method of detecting object information

An optoelectronic sensor () for detecting objects comprises a light transmitter () for transmitting a light beam (), a rotatable deflection unit () for periodically deflecting the light beam (), an angle measuring unit () for determining an angular position of the deflection unit (), a light receiver () for generating a reception signal from a reflected light beam (), wherein the angle measuring unit () comprises an image sensor () moving with the deflection unit and arranged in the direction of a stationary part () of the sensor (), or a stationary image sensor () arranged in the direction of the deflection unit (), further comprising a computing unit () to determine a relative movement of the deflection unit () with respect to the sensor () from a signal of the image sensor ().

Optoelectronic detection of objects by measurement of angular position to determine relative movement of a deflection unit

An optoelectronic sensor () for detecting objects in a monitored zone () is provided which has the following: a front screen (); a light transmitter () for transmitting a light beam (); a movable deflection unit () for the periodic sampling of the monitored zone () by the light beam (); a light receiver () for generating a received signal from the light beam () remitted by the objects; at least one test light transmitter (); at least one test light transmitter (), at least one test light receiver () and at least one test light reflector () which span a test light path (-) through the front screen (); and an evaluation unit () which is configured to acquire pieces of information on the objects in the monitored zone () from the received signal and to recognize an impaired light permeability of the front screen () from a test light signal which the test light receiver () generates from test light which is transmitted from the test light transmitter () and which is reflected at the test light reflector (). In this respect, the test light reflector () is arranged such that it moves along with the deflection unit ().

Optoelectronic sensor and method for the transmission monitoring of a front screen

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.

Laser scanner

An optoelectronic sensor () has a circumferential front screen () comprising a curvature both in a circumferential direction and in a transverse height, thus focusing light reflected at the inside of the front screen (). Test light passes from a test light transmitter (-) through the front screen () to a reflector (-) and subsequently onto a test light receiver (-). A decreasing light transmissivity of the front screen () is detected based on a decrease of a signal generated by the test light in the test light receiver (-). The test light receiver (-) is arranged on a same side of the front screen () as the reflector (-) such that the test light path (-) leads from the reflector (-) via reflection on the inside of the front screen () to the test light receiver (-).

Growing community of inventors

Waldkirch, Germany

Joachim Krämer