Patent ID: 11921187
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. The method of claim 7, wherein the ultrasonic signals are frequency-modulated continuous wave (FMCW) ultrasonic signals that each have a first portion that increase in frequency in a frequency range and a second portion that decreases in frequency in the frequency range, further comprising:
calculating, from the group of the energy values, a plurality of average distances for the plurality of time frames, the plurality of average distances each being calculated using a point corresponding to a reflection of a first portion of the FMCW ultrasonic signals and another point corresponding to a reflection of a second portion of the FMCW ultrasonic signals; and
determining, based at least in part on the plurality of average distances, distance-trajectory data that indicates distances between the object and the device during the period of time.