公开(公告)号：US20240201351A1

公开(公告)日：2024-06-20

申请号：US18532939

申请日：2023-12-07

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Davide RUGGIERO ,  Rosario SCHIANO LO MORIELLO

IPC: G01S7/52

CPC classification number: G01S7/52025

Abstract: Method to provide a TOF estimate by a TOF device. The method comprises: generating an electric echo signal indicative of an ultrasonic echo signal returned by a target body by the ultrasonic source signal; determining an envelope signal indicative of an envelope of the electric echo signal; generating a first TOF estimate by processing the electric echo signal; determining an envelope signal portion of the envelope signal based on a non-PSOA hyperparameter; and generating a second TOF estimate by processing the envelope signal portion through PSOA, the second TOF estimate having a measurement accuracy value greater than that of the first TOF estimate. PSOA is optimized based on a PSOA hyperparameter set. The non-PSOA hyperparameter and the PSOA hyperparameter set are selected among a plurality of choices based on the first TOF estimate, so as to obtain the second TOF estimate which has greater accuracy than the first TOF estimate.

公开(公告)号：US20220120883A1

公开(公告)日：2022-04-21

申请号：US17506554

申请日：2021-10-20

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Davide RUGGIERO ,  Rosario Schiano Lo Moriello ,  Annalisa Liccardo ,  Giuseppe CAIAZZO

IPC: G01S7/527 ,  G01S15/10 ,  G06F17/14

Abstract: A method for providing an estimate of a time-of-flight between an ultrasonic signal emitted by a device and an ultrasonic echo signal returned by a target object hit by the ultrasonic signal and received at the device. The method includes acquiring the ultrasonic echo signal thereby obtaining an electric echo signal; determining a noise power of the electric echo signal; determining an envelope signal indicative of an envelope of the electric echo signal; determining a portion of the envelope signal based on at least one operative parameter, the at least one operative parameter being determined according to Particle Swarm Optimization; processing the portion of the envelope signal and the noise power of the echo ultrasonic signal according to an Unscented Kalman Filter to obtain an estimate of the envelope signal, wherein the estimate of the envelope signal is a regenerated version of the envelope signal being regenerated from the portion of the envelope signal, the processing being based on at least one Unscented Kalman Filter parameter determined according to the Particle Swarm Optimization, and providing the estimate of the time-of-flight according to the estimate of the envelope signal.