US 12,481,059 B2
Ultrasonic sensor system for a motor vehicle and method for operating the ultrasonic sensor system
Fabian Haag, Bietigheim-Bissingen (DE); and Denis Aschkenasi, Bietigheim-Bissingen (DE)
Assigned to Valeo Schalter und Sensoren GmbH, Bietigheim-Bissingen (DE)
Appl. No. 18/256,137
Filed by Valeo Schalter und Sensoren GmbH, Bietigheim-Bissingen (DE)
PCT Filed Dec. 1, 2021, PCT No. PCT/EP2021/083674
§ 371(c)(1), (2) Date Jun. 6, 2023,
PCT Pub. No. WO2022/122490, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 10 2020 132 634.3 (DE), filed on Dec. 8, 2020.
Prior Publication US 2024/0036194 A1, Feb. 1, 2024
Int. Cl. G01S 15/931 (2020.01); G01S 7/52 (2006.01); G01S 15/08 (2006.01)
CPC G01S 15/931 (2013.01) [G01S 7/52004 (2013.01); G01S 15/08 (2013.01); G01S 2007/52007 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An ultrasonic sensor system for a motor vehicle, comprising:
an ultrasonic sensor with an electroacoustic transducer arrangement for generating and detecting ultrasonic waves and an electrical test device which is configured to output an electrical test signal to the electroacoustic transducer arrangement and to capture an electrical response signal from the electroacoustic transducer arrangement to the electrical test signal, and
a test control device which is configured to use the electrical test device to capture a characteristic variable of the electrical response signal, while varying a frequency and an amplitude of the electrical test signal at a plurality of measurement points,
wherein the electrical test signal is a constant-current signal, and the characteristic variable comprises an amplitude or a phase angle of a voltage of the response signal at the frequency and amplitude of the electrical test signal at the respective measurement point.