CPC G01S 17/34 (2020.01) [B66C 13/46 (2013.01); G01S 7/4917 (2013.01)] | 19 Claims |
1. An FMCW LiDAR distance measurement apparatus comprising:
a light source that generates a frequency modulated transmission light beam as a transmission signal having a predetermined frequency deviation and transmits said frequency modulated transmission light beam into a measurement zone;
a light receiver that is configured to receive light reflected by objects in the measurement zone as a reception signal; and
a mixer that is configured to mix at least a portion of the transmission signal with the reception signal and with an oscillator frequency to generate a mixed signal,
wherein the distance measurement apparatus is configured to adapt the oscillator frequency to a desired measurement zone,
and wherein the mixer comprises an avalanche photodiode (APD), configured to perform the mixing of at least a portion of the transmission signal, and the reception signal and a bias voltage of the APD acted on by the oscillator frequency.
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