Electronic Measuring Module Location Using RF Proximity Scores
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Solution Overview
Problem
Existing methods for locating electronic measuring modules in vehicle wheels are complex, costly, and ineffective for distinguishing twinned wheels and vehicles with integral transmission systems, as they require extensive learning of radio-frequency signatures or the use of accelerometers.
Innovation Solution
A method where each electronic measuring module determines a set of proximity scores relative to other modules by sending initialization messages at varying power levels and receiving response messages, allowing the electronic control unit to accurately locate the modules based on these scores.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the electronic control unit learns the radio-frequency signatures of modules beforehand, then the location of modules can be determined, but the system becomes significantly complex, time-consuming and costly
Solution Approach 1:
The system performs preliminary actions by having modules automatically exchange proximity information and build a proximity matrix before location determination is needed. This pre-establishes spatial relationships without requiring complex signature learning, resolving the contradiction by preparing the system in advance through simple automated exchanges rather than complex configuration procedures
Solution Approach 2:
Modules determine their own locations autonomously by exchanging signals and processing proximity scores without external intervention. The electronic control unit simply receives the pre-processed proximity matrices and determines locations algorithmically, eliminating the need for complex manual configuration and signature learning procedures
2Measurement precision
If accelerometers or shock sensors are programmed to send messages at predetermined positions, then module location can be detected, but the device complexity increases and twinned wheel discrimination becomes impossible
Solution Approach 1:
The patent replaces mechanical sensors (accelerometers, shock sensors) with a radio-frequency based proximity detection system. Modules use signal strength and exchange patterns to determine their spatial relationships, eliminating the need for mechanical sensing hardware while achieving the same location determination function
Solution Approach 2:
The system changes the parameter used for location determination from mechanical motion detection to radio-frequency signal characteristics. By analyzing proximity scores derived from signal exchange patterns and strengths, the system achieves position detection without mechanical sensors, and can distinguish twinned wheels through their unique spatial signal patterns
3Loss of information
If the electronic control unit requests messages from modules at predetermined positions, then location information can be obtained, but the system becomes complex and costly
Solution Approach 1:
Instead of the electronic control unit actively requesting position information from modules at predetermined positions, the system inverts the approach: modules actively exchange proximity information with each other and autonomously determine their locations. The control unit simply receives the results, reversing the traditional master-slave information request pattern and reducing control unit complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables simple, rapid, and reliable location of modules, effectively distinguishing between left and right wheels and functioning with vehicles having twinned wheels or integral transmission systems, reducing complexity and cost.
Implementation Method 1
sending by the module termed the sending module of an initialization message to the other modules, termed receiving modules, said initialization message being coded in radio-frequency signals sent, preferably periodically, at increasing power levels
Data Source
AI summary
Disclosed is a method of locating a plurality of electronic measuring modules mounted in the wheels of a motor vehicle. The method includes the steps of determination (E1) by each electronic measuring module of a set of proximity scores with respect to the other modules, sending (E2) by each module of the set of proximity scores to the electronic control unit, reception (E3) by an electronic control unit of the sets of proximity scores sent, and location (E4) of each module from the sets of proximity scores received.