Sick Ag

Michael Engler

Joachim Krämer

Markus Hammes

Fabian Jachmann

Magnus Albert

Christof J Meyer

Bernd Rothenberger

Jörg Sigmund

Boris Baldischweiler

Thomas Dollmann

Ino Geisemeyer

Joachim Kraemer

Max Böhme

Krämer Joachim

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 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.

Optical scanner comprising an electronic control device to counteract crosstalk between optical scanners

The present invention relates to a method of operating a scanner for monitoring an least two-dimensional protected field that is divided into a plurality of cyclically scannable monitored fields, wherein the scanner comprises at least one light transmitter and at least one light receiver. The invention further relates to a scanner for monitoring an at least two-dimensional protected field.

Method of operating a scanner and scanner

The present invention relates to a monitoring sensor for the spatially resolved detection of objects in a monitored zone in accordance with the principle of triangulation, comprising The invention further relates to a floor-bound vehicle having a monitoring sensor.

Monitoring sensor and floor-bound vehicle

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

A distance-measuring sensor () is provided for detecting and determining the distance of objects () in a monitored zone comprising a transmitter () for transmitting transmitted pulses; a receiver () for generating a received signal from the transmitted pulses remitted in the monitored zone; a first comparator unit () for digitizing the received signal with reference to a first threshold; and a control and evaluation unit () which is configured to transmit a plurality of transmitted pulses via the transmitter (), to collect the received signals thereupon generated by the receiver () 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 () to the object (). In this respect, a second comparator unit () is provided for digitizing the received signal with reference to a second threshold, wherein the first comparator unit (), the second comparator unit () and the control and evaluation unit () 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.

Distance-measuring sensor and method for detecting and determining the distance of objects

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.

Growing community of inventors

Sexau, Germany

Michael Engler