Patent · US Active

Method for the improved detection of a ground echo signal in an ultrasonic sensor of a vehicle

US11391827B2 · kind B2 · utility

0Cited by

2References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Michael Schumann · Stuttgart, DE
Simon Weissenmayer · Flein, DE
Timo Koenig · Unterheinriet, DE

Key dates

Filing date	Apr 4, 2019
Grant date	Jul 19, 2022
Priority date	—
Expiry date	Aug 20, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG01S2015/938
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for detecting a ground echo signal of an ultrasonic sensor of a vehicle. The ultrasonic sensor emits a signal at a first frequency or having a first frequency profile, the signal is reflected by a roadway surface and the reflected signal is received by the ultrasonic sensor and/or by an additional ultrasonic sensor. The received echo signal is filtered with the aid of a matched filter, the matched filter being adapted to the emitted signal and having a characterizing frequency. In this way a ground echo signal is determined from the filtered signal. The instantaneous vehicle speed is determined and an expected Doppler shift of the reflected signal is determined as a function of the instantaneous vehicle speed. The first frequency or the first frequency profile and/or the characterizing frequency of the matched filter is/are adapted as a function of the Doppler shift to be expected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.