DE-102025146181-A1 - Multi-device monitoring of the output of a wheel speed sensor

DE102025146181A1DE 102025146181 A1DE102025146181 A1DE 102025146181A1DE-102025146181-A1

Abstract

The present disclosure relates to a processing system for a vehicle and, in particular, techniques for wheel speed detection with increased reliability. An exemplary device for processing wheel speed signals generally comprises: a first controller configured to receive and process a wheel speed signal to identify a first wheel speed for a wheel of a vehicle; and a second controller configured to receive and process the wheel speed signal to identify a second wheel speed for the same wheel, comparing the first wheel speed with the second wheel speed to identify any error related to the processing of the wheel speed signal.

Inventors

Joseph Caniel Himmelheberr
Michael James Hibbard
Vivek Vaid

Assignees

RIVIAN IP HOLDINGS, LLC

Dates

Publication Date: 20260513
Application Date: 20251110
Priority Date: 20251014

Claims (20)

A device for processing wheel speed signals, comprising: a first controller configured to receive and process a wheel speed signal to identify a first wheel speed for a wheel of a vehicle; and a second controller configured to receive and process the wheel speed signal to identify a second wheel speed for the wheel of the vehicle, comparing the first wheel speed with the second wheel speed to identify any error related to the processing of the wheel speed signal.
establishment according Claim 1 , furthermore comprising a wheel speed sensor configured to generate the wheel speed signal for the wheel of the vehicle.
establishment according Claim 1 , furthermore comprising a third control configured to compare the first wheel speed and the second wheel speed in order to identify the fault.
establishment according Claim 1 , wherein: the first controller comprises at least one first measuring resistor; the second controller comprises at least one second measuring resistor, wherein the at least one first measuring resistor and the at least one second measuring resistor are part of a series path; and the wheel speed signal comprises a current provided on the series path.
establishment according Claim 4 , wherein: the first controller is configured to detect a voltage across the at least one first measuring resistor to identify the first wheel speed; and the second controller is configured to detect a voltage across the at least one second measuring resistor to identify the second wheel speed.
establishment according Claim 1 , where the first controller and the second controller are part of different power supply areas.
establishment according Claim 1 , wherein: the wheel speed signal of the first controller is provided with a first latency; and the wheel speed signal of the second controller is provided with a second latency, wherein a difference between the first latency and the second latency is less than a predetermined latency difference threshold.
establishment according Claim 1 , wherein: the first controller is further configured to receive and process a further wheel speed signal to identify a third wheel speed for a further wheel of the vehicle; and the second controller is further configured to receive and process the further wheel speed signal to identify a fourth wheel speed for the further wheel of the vehicle.
establishment according Claim 8 , comparing the third wheel speed with the fourth wheel speed to identify any further error related to the processing of the wheel speed signal for the next wheel speed sensor.
Method for processing wheel speed signals, comprising: Processing a wheel speed signal via a first controller to identify a first wheel speed for a wheel of a vehicle; and Processing the wheel speed signal via a second controller to identify a second wheel speed for the wheel of the vehicle, comparing the first wheel speed with the second wheel speed to identify any error related to the processing of the wheel speed signal.
Procedure according to Claim 10 , furthermore encompassing the generation of the wheel speed signal for the wheel of the vehicle via a wheel speed sensor.
Procedure according to Claim 10 , furthermore, including comparing the first wheel speed and the second wheel speed via a third control to identify the fault.
Procedure according to Claim 10 , wherein: the first controller includes at least one first measuring resistor; the second controller includes at least one second measuring resistor; the at least one first measuring resistor and the at least one second measuring resistor are part of a series path; and the wheel speed signal includes a current provided on the series path.
Procedure according to Claim 13 , wherein: processing the wheel speed signal via the first controller detecting a voltage across the at least one first measuring resistor via the first controller to determine the first wheel speed to identify, includes; and the processing of the wheel speed signal via the second controller includes detecting a voltage across the at least one second measuring resistor via the second controller to identify the second wheel speed.
Procedure according to Claim 10 , where the first control and the second control are part of different power supply areas.
Procedure according to Claim 10 , wherein: the wheel speed signal of the first controller is provided with a first latency; and the wheel speed signal of the second controller is provided with a second latency, wherein a difference between the first latency and the second latency is less than a predetermined latency difference threshold.
Procedure according to Claim 10 , furthermore comprising: generating another wheel speed signal for another wheel of the vehicle via another wheel speed sensor; processing the further wheel speed signal via the first controller to identify a third wheel speed for the further wheel of the vehicle; and processing the further wheel speed signal via the second controller to identify a fourth wheel speed for the further wheel of the vehicle.
Procedure according to Claim 17 , furthermore, including comparing the third wheel speed with the fourth wheel speed to identify any further error related to the processing of the wheel speed signal for the further wheel speed sensor.
Vehicle, comprising: a wheel; a wheel speed sensor configured to generate a wheel speed signal for the wheel; a first controller configured to receive and process the wheel speed signal to identify a first wheel speed for the wheel; and a second controller configured to receive and process the wheel speed signal to identify a second wheel speed for the vehicle wheel, comparing the first wheel speed with the second wheel speed to identify any fault related to the processing of the wheel speed signal.
Vehicle after Claim 1 , furthermore comprising a third control configured to compare the first wheel speed and the second wheel speed in order to identify the fault.

Description

REFERENCE TO A RELATED REGISTRATION This application claims the benefit and priority of the preliminary US patent application no. 63/719,064 , submitted on November 11, 2024, which is hereby expressly incorporated herein in its entirety and for all applicable purposes as if it were fully executed below. AREA OF REVELATION The present disclosure relates to a processing system for a vehicle and, in particular, techniques for wheel speed detection with increased reliability. DESCRIPTION OF THE STATE OF THE TECHNOLOGY Vehicles can be equipped with various control systems designed to improve their functionality, safety, and efficiency. These systems manage and regulate different vehicle components to achieve specific performance outcomes. At the heart of these systems are feedback loops, sensors, actuators, and control algorithms that monitor and adjust various parameters. For example, a vehicle might include multiple external cameras to capture views around the vehicle, which are then displayed to the driver on front-facing screens. Vehicle control systems also play a crucial role in detecting vehicle speed. This is often achieved through wheel speed sensors. These sensors generate signals that are processed by electronic control units (ECUs) to derive the wheel speed. Accurate wheel speed measurement is essential for the safe and efficient operation of modern vehicles. Reliable wheel speed data forms the basis for critical systems such as anti-lock braking systems (ABS), traction control, and stability management, directly impacting vehicle responsiveness and occupant safety. Deviations in wheel speed measurement can lead to performance losses, increased wear of mechanical components and impairment of safety functions. SUMMARY Certain aspects of the present disclosure relate to a device for processing wheel speed signals. The device generally includes: a first controller configured to receive and process a wheel speed signal to identify a first wheel speed for a wheel of a vehicle; and a second controller configured to receive and process the wheel speed signal to identify a second wheel speed for the same wheel, comparing the first wheel speed with the second wheel speed to identify any error related to the processing of the wheel speed signal. Certain aspects of the present disclosure relate to a method for processing wheel speed signals. The method generally includes: processing a wheel speed signal via a first controller to identify a first wheel speed for a wheel of a vehicle; and processing the wheel speed signal via a second controller to identify a second wheel speed for the wheel of the vehicle, comparing the first wheel speed with the second wheel speed to identify any error related to the processing of the wheel speed signal. Certain aspects of the present disclosure relate to a vehicle. The vehicle generally includes: a wheel; a wheel speed sensor configured to generate a wheel speed signal for the wheel; a first controller configured to receive and process the wheel speed signal to identify a first wheel speed for the wheel; and a second controller configured to receive and process the wheel speed signal to identify a second wheel speed for the vehicle's wheel, comparing the first wheel speed with the second wheel speed to identify any fault related to the processing of the wheel speed signal. BRIEF DESCRIPTION OF THE DRAWINGS 1A illustrates an exemplary vehicle according to specific embodiments.1B illustrates a vehicle chassis according to certain embodiments.2A is a schematic block diagram of components of a vehicle according to specific embodiments.2B is a schematic block diagram of alternative components of a vehicle according to specific embodiments.3 illustrates a processing system with multiple electronic control units (ECUs), in which each of several wheels The sor signals are processed by the multiple ECUs, according to certain aspects of the present disclosure.4 illustrates an exemplary current sensing system for identifying the wheel speed at each of several ECUs according to certain aspects of the present disclosure.5 is a flowchart illustrating exemplary processes for processing wheel speed signals according to certain aspects of the present disclosure. DETAILED DESCRIPTION Certain aspects of this disclosure relate to devices and techniques for processing wheel speed signals. A wheel speed sensor can be used to generate a wheel speed signal for a wheel of a vehicle. The wheel speed signal can be received and processed by separate controllers to identify the wheel speed independently. For example, a first controller can process the wheel speed signal to identify a first wheel speed, while a second controller processes the same signal to identify a second wheel speed. The two derived wheel speeds are then compared to identify any errors related to the processing of the wheel speed signal. This redundant processing increases the accuracy and reliability of the wheel speed data, which is