Sick Ag

Fabian Jachmann

Markus Hammes

Michael Engler

Bernd Rothenberger

Andreas Schieber

Thomas Dollmann

Simon Franzreb

Silja Reichert

The invention relates to an optoelectronic safety device with a light transmitter (), a light receiver () for receiving received light beams () from reflections on at least one object () in the monitored region (), an evaluation unit () for evaluating the received signals and for outputting a safety signal as a function of the received signals, the evaluation unit () comprising a standard multicore processor which is formed on only one semiconductor substrate and has at least two CPUs (), the standard multi-core processor () not being a dedicated safety module and the evaluation being carried out redundantly on both CPUs (and) of the computing unit (), and the evaluation unit () having a watchdog controller () which monitors the function of the computing unit (), the watchdog controller () being able to cause the evaluation unit () to output the safety signal independently of the computing unit ().

Optoelectronic safety device

A safety laser scanner for detecting objects in a monitored zone having a light transmitter for transmitting a light beam into the monitored zone; having a light receiver for generating a received signal from the light beam remitted by the objects; having a rotatable deflection unit for a periodic deflection of the light beam to scan the monitored zone in the course of the movement; having an internal reference target that reflects the transmitted light beam within the safety laser scanner to the light receiver to generate a reference signal; and having a control and evaluation unit that is configured to detect objects with reference to the received signal and to check the operability of the safety laser scanner with reference to the reference signal, The control and evaluation unit is here configured to change the sensitivity of the detection in dependence on the reference signal.

Safety laser scanner and method for maintaining operability

A method of operating a monitoring sensor comprising a light transmitter; a light receiver; and a deflection unit is described, with the method comprising the steps:

Method of operating a distance-measuring monitoring sensor and distance measuring monitoring sensor

A distance-measuring optoelectronic sensor () uses two sampling memories for detection of objects in a monitoring zone (). The sensor () has a light transmitter () for transmitting a transmission light pulse () into the monitoring area (), a light receiver () for generating a reception signal from the light pulse () remitted by objects in the monitoring area (), a control and evaluation unit () configured to determine a reception point in time from the reception signal and the distance of the object by means of a light time of flight method, and a first and second sampling memory () having a plurality of memory cells each for storing a section of the reception signal. Partially overlapping recording regions are used, with each alternately recording a reception signal for a longer duration than a time interval between two successive transmission light pulses ().

Sensor and method for distance measurement

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

The invention relates to an optoelectronic sensor for monitoring a monitored zone. The sensor comprises a main light transmitter for transmitting sensing light signals that propagate through a protective screen into the monitored zone; a main light receiver for receiving light that emanates from the monitored zone; and a control unit for controlling the sensor. The sensor is configured in this respect to carry out a contamination recognition in which the degree of contamination of the protective screen is determined by means of a measured contamination value. The sensor in accordance with the invention is characterized in that the control unit is adapted to recognize the approach of a hand and/or of a finger toward the protective screen with reference to the contamination recognition and to output an action signal on the recognition of the hand and/or of the finger.

Optoelectronic sensor

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

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

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Freiburg, Germany

Fabian Jachmann