US 12,352,777 B2
Control circuit for a sensor, an electrical control unit for a wheel speed sensor, a method of operating a wheel speed sensor, a method of controlling a sensor and a computer program
Simone Fontanesi, Villach (AT); Filippo Grillotti, Villach (AT); Alessandro Petri, Villach (AT); and Massimiliano Zilli, Villach (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Mar. 10, 2023, as Appl. No. 18/181,755.
Application 18/181,755 is a continuation of application No. 17/314,216, filed on May 7, 2021, granted, now 11,614,458.
Claims priority of application No. 102020113443.6 (DE), filed on May 18, 2020.
Prior Publication US 2023/0213547 A1, Jul. 6, 2023
Int. Cl. G01P 3/44 (2006.01); G01B 21/22 (2006.01); G01P 21/00 (2006.01)
CPC G01P 3/44 (2013.01) [G01B 21/22 (2013.01); G01P 21/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control circuit for a wheel speed sensor, the control circuit comprising:
an input interface configured to receive high-resolution wheel speed data and low-resolution wheel speed data; and
circuitry configured to determine information on a functional state of the wheel speed sensor using the high-resolution wheel speed data and the low-resolution wheel speed data,
wherein the circuitry is configured to evaluate the low-resolution wheel speed data, and detect a first signal event and a second signal event signaled by the low-resolution wheel speed data, and
wherein the circuitry is configured to evaluate the high-resolution wheel speed data, determine a number of signal events which are signaled by the high-resolution wheel speed data between the first signal event and the second signal event, and detect a failure state of the wheel speed sensor if the number of signal events which are signaled by the high-resolution wheel speed data between the first signal event and the second signal event deviates from an expected number.