US 12,442,904 B2
Compensation for an ultrasonic transducer with a variable compensation inductance
Philipp Maurer, Bietigheim-Bissingen (DE); Bastian Hafner, Bietigheim-Bissingen (DE); and Thomas Frintz, Bietigheim-Bissingen (DE)
Assigned to Valeo Schalter und Sensoren GmbH, Bietigheim-Bissingen (DE)
Appl. No. 18/019,339
Filed by Valeo Schalter und Sensoren GmbH, Bietigheim-Bissingen (DE)
PCT Filed Jul. 28, 2021, PCT No. PCT/EP2021/071089
§ 371(c)(1), (2) Date Feb. 2, 2023,
PCT Pub. No. WO2022/028970, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 10 2020 120 698.4 (DE), filed on Aug. 5, 2020.
Prior Publication US 2023/0288546 A1, Sep. 14, 2023
Int. Cl. G01S 7/52 (2006.01); B06B 1/02 (2006.01); G01S 7/529 (2006.01); G01S 15/10 (2006.01); G01S 15/931 (2020.01)
CPC G01S 7/52006 (2013.01) [B06B 1/0215 (2013.01); G01S 7/529 (2013.01); G01S 15/10 (2013.01); G01S 15/931 (2013.01); B06B 2201/40 (2013.01); B06B 2201/55 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An ultrasonic transducer comprising a piezo element for use on a vehicle, comprising:
an actuation and evaluation circuit for producing an actuation voltage for the piezo element that produces and emits an ultrasonic signal depending on the actuation voltage, and for outputting an output signal on the basis of an echo signal received at the piezo element; and
a gyrator circuit for continuously providing a compensation inductance for adjusting the actuation and evaluation circuit for compensating for a parasitic connection capacitance of the piezo element,
wherein the gyrator circuit is configured with a variable compensation inductance, and
wherein the gyrator circuit comprises a switching apparatus to connect and isolate the compensation inductance to and from the actuation voltage.