Method and device for optical distance measurement
AssigneeMicrovision, Inc.
InventorHanno Holzhüter
Life of this patent
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Abstract
A method for optical distance measurement is suggested which comprises executing at least one time-of-flight measurement, wherein a time-of-flight measurement comprises transmitting at least one measuring pulse by means of a transmission unit, reflecting at least one transmitted measuring pulse and receiving at least one reflected measuring pulse by means of a reception unit. The method further comprises generating a backscatter curve based on the time-of-flight measurement and evaluating the backscatter curve for object recognition.
Claims19
A device for optical distance measurement, the device comprising:
- a transmission unit adapted to transmit measuring pulses;
- a reception unit, the reception unit including at least one reception element adapted to receive reflections of the measuring pulses to determine a time-of-flight measurement from the received reflections, and wherein a sensitivity curve describes a sensitivity of at least one of the at least one reception element as a function of distance to an object;
- and
- an evaluation unit adapted to
- generate a backscatter curve, wherein the backscatter curve describes signals generated responsive to the received reflections of at least one measuring pulse;
- determine a correlation between the sensitivity curve and the backscatter curve;
- and
- determine whether at least one section in the backscatter curve indicates a particle cloud arranged in a measuring range that was measured by the time-of-flight measurement or indicates an object in the measuring range that was measured by the time-of-flight measurement based on the determined correlation.
A method, the method comprising:
- transmitting measuring pulses;
- receiving reflections of the measuring pulses with at least one reception unit;
- determining a time-of-flight measurement from the received reflections;
- generating a backscatter curve, wherein the backscatter curve describes signals generated responsive to the received reflections of at least one measuring pulse;
- determining a correlation between a sensitivity curve and the backscatter curve, where the sensitivity curve describes a sensitivity of at least one of the at least one reception element as a function of distance to an object;
- and
- determining whether at least one section in the backscatter curve indicates a particle cloud arranged in a measuring range that was measured by the time-of-flight measurement or indicates an object in the measuring range that was measured by the time-of-flight measurement based on the determined correlation.
A computer program product, which comprises a computer-readable medium, on which a program is stored, once it has been loaded into the memory of the computer, enabling a computer to implement a method for optical distance measurement, where the method comprises:
- transmitting measuring pulses;
- receiving reflections of the measuring pulses with at least one reception unit;
- determining a time-of-flight measurement from the received reflections;
- generating a backscatter curve, wherein the backscatter curve describes signals generated responsive to the received reflections of at least one measuring pulse;
- determining a correlation between a sensitivity curve and the backscatter curve, where the sensitivity curve describes a sensitivity of at least one of the at least one reception element as a function of distance to an object;
- and
- determining whether at least one section in the backscatter curve indicates a particle cloud arranged in a measuring range that was measured by the time-of-flight measurement or indicates an object in the measuring range that was measured by the time-of-flight measurement based on the determined correlation.
Dependencies are inferred from the claim text.