Vehicle Wheel Electronic Casing Multi-Protocol Signal Transmission
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Solution Overview
Problem
Current methods for locating vehicle wheels using angular correlation between sensor signals from active safety systems are inefficient in terms of energy consumption and reliability, particularly when dealing with multiple protocols and high rotational speeds.
Innovation Solution
An electronic casing method that transmits identification signals formulated according to multiple protocols by determining a fixed reference angular position and sending bursts of signals at offset positions, optimizing energy consumption and improving responsiveness and reliability by masking transmission positions at high rotational speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electronic casing transmits identification signals formulated according to multiple protocols using conventional methods, then the system can communicate with central processing units of different makes and models, but the energy consumption of the electronic casing increases significantly
Solution Approach 1:
The electronic casing transmits identification signals in periodic bursts at specific angular positions during wheel rotation, rather than continuously transmitting all protocols. This periodic transmission at predetermined angular positions significantly reduces energy consumption while maintaining multi-protocol compatibility.
Solution Approach 2:
The system pre-determines fixed angular positions for signal transmission before the wheel rotates. By establishing these transmission positions in advance based on the reference angular position, the electronic casing avoids continuous signal processing and transmission, thereby reducing energy consumption while ensuring all protocols are covered.
2Reliability
If the electronic casing transmits signals continuously at all angular positions, then the reliability of wheel location is improved, but the energy consumption increases and responsiveness decreases
Solution Approach 1:
The system transmits identification signals periodically at specific angular positions determined by the wheel's rotation, rather than continuously. This periodic transmission maintains reliability by ensuring signals are sent at sufficient intervals while dramatically reducing energy consumption.
Solution Approach 2:
The transmission strategy dynamically adapts to the wheel's rotational characteristics. The system determines transmission angular positions based on the reference angular position and offset values, creating a dynamic transmission pattern that maintains reliability while optimizing energy usage.
3Measurement precision
If the electronic casing determines reference angular position through increased sampling and filtering, then the precision of angular position determination is improved, but the energy consumption increases significantly
Solution Approach 1:
The system applies a balanced level of sampling and filtering that is sufficient to determine the reference angular position with adequate precision, rather than using excessive sampling and filtering. This partial action approach achieves the necessary measurement precision while avoiding the high energy consumption associated with oversampling and over-filtering.
4Loss of information
If the electronic casing transmits all n identification signals at every angular position, then the completeness of information transmission is improved, but the responsiveness of the locating method decreases
Solution Approach 1:
The electronic casing transmits bursts of n identification signals at predetermined angular positions during wheel rotation, rather than at every possible angular position. This periodic transmission maintains information completeness across multiple protocols while improving responsiveness by reducing the total transmission time.
Solution Approach 2:
The transmission of n identification signals is segmented into bursts transmitted at specific angular positions rather than continuously. This segmentation allows the system to cover all protocols across multiple transmission events, maintaining information completeness while reducing the time loss associated with continuous transmission.
Data Source
AI summary
A method for transmitting n identification signals (P1-P4) formulated according to n different protocols, using an electronic casing (6) provided on a wheel (2) of a vehicle, as part of an angular correlation locating procedure. An electronic casing (6) is used, which is programmed to carry out, per wheel turn, x transmissions commanded for x angular positions offset from each other by predetermined angular values and, during each sending operation, a fixed angular position of the electronic casing (6) is determined, to which position is assigned the reference angular position function for determining the x transmission angular positions of the electronic casing, and a burst of n identification signals sent consecutively for transmission successive angular positions of the electronic casing (6) is transmitted, each of the signals being formulated according to one of the n protocols and including data for identifying the electronic casing and the transmission angular position thereof.