Coupled Wheel Sensor Localization via Angular Position Correlation
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Solution Overview
Problem
Current tire pressure monitoring systems cannot accurately differentiate between sensors mounted in coupled wheels that rotate at common speeds, as they rely on unique wheel rotations for location determination, which is not feasible in coupled configurations.
Innovation Solution
A system and method that utilize a controller to correlate angular positions of transmissions from tire pressure monitoring sensors in coupled wheels, determining their relative positions to accurately locate each sensor based on comparison of angular positions, even when wheels rotate at a common speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If unique wheel rotation patterns are used to determine sensor location, then location accuracy is improved for individual wheels, but the system cannot differentiate sensors in coupled wheels rotating at common speeds
Solution Approach 1:
The patent transitions from using only temporal/rotational patterns to incorporating spatial/angular position information. By measuring the angular position of wheels relative to a reference axis and utilizing the known physical spacing between sensors, the system adds a spatial dimension to differentiate coupled wheels that rotate at identical speeds, resolving the contradiction between maintaining location accuracy and expanding system versatility.
2Stability of the object's composition
If coupled wheels rotate at common speeds to improve vehicle stability, then wheel synchronization is improved, but sensor location differentiation becomes impossible using traditional rotation pattern correlation
Solution Approach 1:
The patent introduces an intermediary reference frame - a fixed reference axis relative to the vehicle body - against which wheel angular positions are measured. This intermediary allows the system to differentiate between coupled wheels based on their angular positions within the vehicle's coordinate system, even when both wheels rotate at identical speeds, thus maintaining both wheel synchronization and sensor location determination capability.
3Adaptability or versatility
If angular position correlation with known sensor spacing is used to locate sensors in coupled wheels, then location determination is achieved for synchronized wheels, but the system requires precise knowledge of relative angular positions
Solution Approach 1:
The system employs feedback by continuously monitoring the angular positions of wheels and comparing the received signal patterns against the known physical spacing between sensors. The controller uses this feedback loop to correlate angular position data with sensor transmission patterns, enabling accurate location determination in coupled wheel configurations while compensating for variations through iterative comparison and validation.
Data Source
AI summary
A disclosed system for monitoring and locating a position of a tire pressure monitoring device within a tire includes a controller configured to detect a first transmission from a first sensor installed within a first wheel and a second transmission from a second sensor installed within a second wheel coupled to the first wheel. The controller and system utilizes a relative angular position corresponding to receipt of the transmissions to identify a lead and trailing tire pressure monitoring device. The controller is then enabled to correlate the signals with a known sequence of sensors to determine within which of the coupled tire assembly includes which tire pressure monitoring device.