Wheel Position Location via Phase Offset Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wheel position location methods in motor vehicles require significant digital processing resources, leading to performance degradation and increased energy consumption, especially in adverse conditions such as strong vehicle dynamics or poor road conditions, and struggle to accurately associate electronic device signals with their corresponding wheels.
Innovation Solution
A method that compares wheel position signals from electronic devices with those from independent wheel speed sensors by measuring phase offsets, identifying a constant phase offset to assign the electronic device to the correct wheel, using at least two sequences of parameter acquisitions and filtering to enhance accuracy and reduce resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex digital processing is used to locate wheel positions by comparing sensor signals, then measurement precision is improved, but device complexity and energy consumption increase
Solution Approach 1:
The patent extracts the essential feature for wheel location by comparing only the phase offset between two signals, rather than performing complex full-signal processing. This extracts the critical information needed while discarding unnecessary computational complexity, resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent changes the approach from complex signal processing to simple phase offset measurement. By transforming the problem into measuring a single parameter (phase offset) rather than processing entire signals, the solution achieves accurate wheel location with minimal computational resources
2Measurement precision
If complex digital processing is used to locate wheel positions, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The patent extracts only the essential phase offset information from the signals, avoiding energy-intensive full signal processing. This extraction approach maintains measurement precision while dramatically reducing energy consumption by processing only the critical parameter
Solution Approach 2:
The patent uses a simple, low-cost phase offset measurement approach instead of expensive complex processing algorithms. This disposable-like simplicity in the measurement method achieves the required precision without the high energy cost of sophisticated processing
3Device complexity
If existing wheel speed sensors are used for location, then device complexity is reduced, but reliability decreases in adverse conditions
Solution Approach 1:
The patent uses the existing wheel speed sensors as intermediaries for location determination. By comparing the phase offset between the electronic device signal and the wheel speed sensor signal, the system leverages the already-present sensors to achieve reliable location without adding complex new hardware, even in adverse conditions
Data Source
AI summary
A method for locating at least one wheel of a vehicle, the wheels each being equipped with an electronic device which sends a wheel rotation signal to a central unit, a speed sensor for each wheel which supplies a signal to the central unit. For each electronic device, at least two sequences of several acquisitions are performed by formation of the signal with simultaneous acquisition by the central unit of the signal transmitted by each speed sensor. A pairing is performed of the two signals for an electronic device with each of the wheel speed signals. For each pair, a phase offset is measured between the two signals. When a constant phase offset is measured in the pairs with a speed sensor, the electronic device associated with the signal is identified as being assigned to the wheel associated with the speed sensor.