Sick Ag

Thomas Dollmann

Michael Engler

Bernd Rothenberger

Stefan Mack

Fabian Jachmann

Gregor Huber

Martin Kufner

Alice Magin

Scott Marsden

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 invention relates to a laser scanning apparatus, in particular for distance determination, comprising a transmission unit which has a pulsed laser for the transmission of a light beam into a zone to be monitored, comprising a light deflection unit to deflect the light beam transmitted by the pulsed laser into the zone to be monitored, comprising a reception unit for the reception of light pulses which are reflected by an object located in the zone to be monitored, and comprising a front screen which transmits the light beam and which separates the transmission unit, the reception unit and the light deflection unit from the surroundings of the laser scanning apparatus, with at least one optical element being provided which splits off a part beam from the transmitted light beam and deflects the part beam to a photo-detector for a measurement of the transmission of the front screen.

Laser scanning apparatus

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Waldkirch, Germany

Thomas Dollmann