公开(公告)号：US20170122789A1

公开(公告)日：2017-05-04

申请号：US15405897

申请日：2017-01-13

Applicant: CONTINENTAL AUTOMOTIVE GMBH

Inventor： Sonny Borsoi ,  Cheikh Diouf ,  Mathieu Dupriez ,  Denis Mesmer

IPC: G01F23/296 ,  F01N3/20

CPC classification number: G01F23/2962 ,  F01N3/2066 ,  F01N2610/02 ,  F01N2610/1406 ,  F01N2900/1814 ,  G01F23/0061 ,  G01F25/0061 ,  G01N29/024 ,  G01N2291/011 ,  G01N2291/0222 ,  G01N2291/02836 ,  G01N2291/045 ,  G01N2291/101 ,  Y02A50/2325 ,  Y02T10/24 ,  Y10S367/902 ,  Y10S367/908

Abstract: The disclosure relates to a method for determining a level of a liquid in a tank with an ultrasonic fill state sensor and at least two reference surfaces for reflecting an ultrasonic wave transmitted by the ultrasonic fill state sensor. A first reference surface is arranged below a second reference surface. The method includes determining a first propagation speed of an ultrasonic wave to the first reference surface on a first measurement path and a second propagation speed from the first reference surface to the second reference surface on a second measurement path. The method also includes measuring a propagation time of an ultrasonic wave from the ultrasonic fill state sensor to a liquid level of the liquid in the tank, selecting the first propagation speed or the second propagation speed based on at least one selection criterion, and calculating a fill state using the propagation time measured.

公开(公告)号：US10386221B2

公开(公告)日：2019-08-20

申请号：US15405897

申请日：2017-01-13

Applicant: CONTINENTAL AUTOMOTIVE GMBH

Inventor： Sonny Borsoi ,  Cheikh Diouf ,  Mathieu Dupriez ,  Denis Mesmer

IPC: F01N3/20 ,  G01F23/00 ,  G01F25/00 ,  G01F23/296 ,  G01N29/024

Abstract: The disclosure relates to a method for determining a level of a liquid in a tank with an ultrasonic fill state sensor and at least two reference surfaces for reflecting an ultrasonic wave transmitted by the ultrasonic fill state sensor. A first reference surface is arranged below a second reference surface. The method includes determining a first propagation speed of an ultrasonic wave to the first reference surface on a first measurement path and a second propagation speed from the first reference surface to the second reference surface on a second measurement path. The method also includes measuring a propagation time of an ultrasonic wave from the ultrasonic fill state sensor to a liquid level of the liquid in the tank, selecting the first propagation speed or the second propagation speed based on at least one selection criterion, and calculating a fill state using the propagation time measured.