Method for determining vehicle movement information, sensor device, computer program, computer-readable medium, and corresponding vehicle

The process of converting analog sensor signals from pulse wheels into digital output signals, with compensation for influence factors, addresses the challenges of signal variation in determining vehicle movement information, thereby improving robustness and accuracy.

FR3154802A1Pending Publication Date: 2025-05-02CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH
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Patent Information

Application Number
FR2024011882
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-10-30
Filing Date
2024-10-30
Publication Date
2025-05-02

AI Technical Summary

Technical Problem

Existing systems for determining vehicle movement information using pulse wheels and Hall effect sensors face challenges due to significant variations in the amplitude and shape of the magnetic field signal, influenced by factors such as geometry, temperature, and mechanical wear.

Method used

A process that involves acquiring an analog sensor signal from a sensor detecting variations in the magnetic field caused by a pulse wheel's movement, and then converting this signal into two digital output signals. The first digital output signal is used for determining movement information, while the second signal compensates for influence factors by adjusting state variations based on predefined hysteresis values.

Benefits of technology

This approach enhances the robustness of signal acquisition by compensating for internal and external influence factors, allowing for accurate determination of vehicle movement information even with non-ideal pulse wheels.

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Abstract

Method for determining vehicle motion information, sensor device, computer program, computer-readable medium, and corresponding vehicle. This method for determining vehicle motion information (1) comprises an analog sensor signal (S) being acquired by a sensor (5) from a change in the magnetic field in response to the movement of an associated pulse wheel (3), coupled to the movement of the vehicle. A first digital output signal is determined based on a second digital output signal derived from the sensor signal (S) to compensate for factors influencing the quality of the sensor signal (S). A state variation of the second output signal is set when a current value exceeds a minimum hysteresis value. A maximum hysteresis value is specified based on a comparison of extreme values ​​of the sensor signal.A state variation of the first output signal is set when a current value, compared to a relative extreme value, exceeds the maximum hysteresis value. Figure for the abbreviation: Figure 1.
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