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Optoelectric Sensor and Method for the Detection and Distance Determination of Objects

  • US 20150015868A1
  • Filed: 06/19/2014
  • Published: 01/15/2015
  • Est. Priority Date: 07/11/2013
  • Status: Active Grant
First Claim
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1. An optoelectronic sensor (10) for the detection and distance determination of objects in a monitoring area (18), the sensor (10) comprisinga light transmitter (12) for transmitting a transmission light beam (14) having a plurality of consecutive individual light pulses,a rotatable deflection unit (16) for a periodic deflection of the transmission light beam (14) in the monitoring area (18),an angle measuring unit (28) for determining an angular position of the deflection unit (16),a light receiver (24) for generating reception pulses from transmission light remitted or reflected by objects in the monitoring area (18),at least one histogram memory (34), andan evaluation unit (30) which is configured to accumulate a time histogram from a plurality of reception pulses in the histogram memory (34) and to determine, from the histogram, a light time of flight from the sensor (10) to an object and therefrom an object distance,characterized in thata plurality of histogram memories (34) is provided each associated with an angular position,and in that the evaluation unit (30) is configured to accumulate time histograms in the histogram memories (34) across several periods of the rotational movement of the deflection unit (16) from reception pulses which are each detected at the angular position associated with the respective histogram memory (34), and to determine the object distance for an angular position from the histogram of the associated histogram memory (34).

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