Tire Position Identification via Sensor Signal Analysis
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Solution Overview
Problem
Current tire pressure monitoring systems face challenges in accurately determining the side location of tires on a vehicle, as they rely on known positions of low frequency initiators and wheel sensors, which can be inefficient and prone to errors in identifying tire positions.
Innovation Solution
A vehicle tire monitoring system that includes sensor arrangements at each tire transmitting output signals indicative of their state, including direction of rotation, and a receiver that determines if tires are on the same side of the vehicle based on these signals, using electromagnetic field generators to initiate communication and determine proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If four low frequency initiators are used to determine tire position, then tire position can be identified, but the system becomes complex and prone to errors
Solution Approach 1:
The patent extracts the position determination function from the complex initiator-based system and implements it through sensor arrangements that directly transmit their state information. The receiver arrangement determines tire position by analyzing signals from sensors already present on the tires, eliminating the need for separate initiators and reducing system complexity while maintaining position identification capability
Solution Approach 2:
The sensor arrangements serve multiple functions: they monitor tire state parameters and simultaneously enable position determination. The same sensors that detect tire conditions also provide the data needed for the receiver to identify which side of the vehicle the tire is on, eliminating the need for dedicated position-finding components
2Measurement precision
If low frequency initiators are commanded to transmit signals sequentially, then tire position can be determined, but the process is time-consuming and inefficient
Solution Approach 1:
The sensor arrangements continuously monitor and hold tire state information ready for transmission. When the receiver needs position information, the data is already prepared and can be transmitted immediately in response to a request signal, eliminating the sequential polling delay inherent in the initiator-based system
Solution Approach 2:
The system implements a feedback mechanism where the receiver sends a request signal and the sensor arrangement responds with its state information. This feedback loop enables rapid, on-demand position determination without the need for sequential commanding of multiple initiators, significantly reducing the time required to identify tire positions
Data Source
AI summary
A tire monitoring system for a vehicle having tires determines if two tires share a same side of the vehicle based on a state of each of the two tires. In at least one embodiment, a first output signal indicative of a state of a first tire and a second output signal indicative of a state of a second tire are transmitted and received. A determination as to whether the first tire and the second tire are on a same side of the vehicle based on the state of the first tire and the state of the second tire is made.