EP 4341718 A1 20240327 - METHOD FOR DETERMINING A FUNCTION STATE OF AN ULTRASONIC SENSOR FOR A VEHICLE
Title (en)
METHOD FOR DETERMINING A FUNCTION STATE OF AN ULTRASONIC SENSOR FOR A VEHICLE
Title (de)
VERFAHREN ZUM BESTIMMEN EINES FUNKTIONSZUSTANDS EINES ULTRASCHALLSENSORS FÜR EIN FAHRZEUG
Title (fr)
PROCÉDÉ POUR DÉTERMINER UN ÉTAT DE FONCTIONNEMENT D'UN CAPTEUR À ULTRASONS POUR UN VÉHICULE
Publication
Application
Priority
- DE 102021112996 A 20210519
- EP 2022062524 W 20220510
Abstract (en)
[origin: WO2022243090A1] Method for determining a function state (FZ) of an ultrasonic sensor (2) for a vehicle (1), having the steps of: a) applying (S1) an electrical test signal (P) to the ultrasonic sensor (2); b) detecting (S2) an electrical response signal (A) from the ultrasonic sensor (2); c) determining (S3) a phase-frequency response (PF) comprising the phase angle (α) of the detected response signal (A) for the applied test signal (P) on the basis of an excitation frequency (f) of the applied test signal (P); d) comparing (S4) at least a first phase angle (P1) below and a second phase angle (P2) above a resonant frequency (R) in the determined phase-frequency response (PF) with a respective expected phase angle (PE1, PE2); e) correcting (S5) the determined phase-frequency response (PF) on the basis of the comparison; and f) determining (S6) the function state (FZ) on the basis of the corrected phase-frequency response (PFK).
IPC 8 full level
G01S 7/52 (2006.01); G01S 15/931 (2020.01)
CPC (source: EP KR US)
G01S 7/52004 (2013.01 - EP KR US); G01S 15/931 (2013.01 - EP KR US); G01S 2007/52009 (2013.01 - EP KR US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 102021112996 A1 20221124; CN 117337403 A 20240102; EP 4341718 A1 20240327; JP 2024521991 A 20240605; KR 20230172018 A 20231221; US 2024230869 A1 20240711; WO 2022243090 A1 20221124
DOCDB simple family (application)
DE 102021112996 A 20210519; CN 202280035415 A 20220510; EP 2022062524 W 20220510; EP 22728467 A 20220510; JP 2023571738 A 20220510; KR 20237039631 A 20220510; US 202218562330 A 20220510