公开(公告)号：WO2021154855A1

公开(公告)日：2021-08-05

申请号：PCT/US2021/015292

申请日：2021-01-27

Applicant: QEEXO, CO

Inventor： MUNEMOTO, Taihei ,  SCHRADIN III, Leslie J.

IPC: G01N29/30 ,  G06F3/043 ,  G01N29/036 ,  G01N29/12 ,  G01N29/4463 ,  G06F2203/04101 ,  G06F2203/04104 ,  G06F2203/04106 ,  G06F3/04182 ,  H04B11/00

Abstract: Ultrasonic sensing device for determining the status of an object near such ultrasonic sensing device. Emission signal having a current frequency or band in an ultrasonic frequency range is emitted. Ultrasonic signals are analyzed to detect one or more objects near the ultrasonic sensing device. After expiration of a predefined time period of emitting the emission signal, a background noise signal is detected from an environment of the ultrasonic device and background noise metrics are estimated based on the background noise signal. The current frequency of the emission signal is optimized based on the background noise metrics. A next frequency or band is selected and the emission signal is emitted at the next frequency or band if it is determined that the current frequency or band is not optimum. The operations of detecting, estimating, determining, and selecting are repeated after each time a next frequency or band is selected and the emission signal is emitted at such next frequency or band.