US 11,874,297 B2
High-resolution PWM wheel speed sensor protocol
René Trapp, Föckelberg (DE); Mario Trott, Münster (DE); and Tillmann Krauss, Frankfurt (DE)
Assigned to Continental Automotive Technologies GmbH, Hannover (DE)
Appl. No. 17/759,692
Filed by Continental Automotive Technologies GmbH, Hannover (DE)
PCT Filed Jan. 28, 2021, PCT No. PCT/DE2021/200007
§ 371(c)(1), (2) Date Jul. 28, 2022,
PCT Pub. No. WO2021/151439, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10 2020 201 080.3 (DE), filed on Jan. 29, 2020.
Prior Publication US 2023/0072836 A1, Mar. 9, 2023
Int. Cl. G01P 3/481 (2006.01)
CPC G01P 3/481 (2013.01) 7 Claims
OG exemplary drawing
 
1. A sensor for detecting relative movements between an encoder, having a periodic scale and/or pattern, and at least one sensor element, the sensor comprising:
a sensor element configured to generate a sensor element output signal; and
a signal processing device configured to output a movement signal based on the sensor element output signal,
wherein the signal processing device is configured to output two or more switching thresholds based on the sensor element output signal,
wherein the signal processing device is configured to compute a relative velocity between the encoder and the sensor element and a defined duration of a movement impulse of the movement signal is dependent on the relative velocity between the encoder and the sensor element being exceeded and/or being fallen short of,
wherein the signal processing device is configured such that for all combinations of the information pairs forward or backward direction of the relative movement between the encoder and the sensor element, and/or the presence or absence of an error and/or, whether the sensor is currently in the high-resolution mode or in the low-resolution mode, the signal processing device is configured to generate a movement impulse having a unique defined duration, for encoding the current information of the respective information pairs, and having a further unique defined duration for encoding the circumstance of the second limit velocity being exceeded or not being fallen short of and/or in particular having a further unique defined duration for encoding an undetected relative movement between the encoder and the sensor element, which is generated after a defined time to identify a halt.