Vehicle Wheel Sensor Self-Localization via Acceleration Measurement
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Solution Overview
Problem
Existing sensor systems in vehicle wheels face challenges in differentiating front/rear positions and managing energy consumption, leading to inefficient self-localization and battery life issues due to unnecessary energy consumption during transmission and reception.
Innovation Solution
A method that utilizes acceleration measurements to determine the front and rear positions of vehicle wheels by identifying points of maximum and minimum acceleration, allowing for effective self-localization and energy management by varying transmission power and optimizing signal reception based on wheel position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous transmission and reception are performed for self-localization, then accurate wheel position identification is achieved, but energy consumption increases and battery life decreases
Solution Approach 1:
The patent implements periodic transmission and reception cycles instead of continuous operation. The system performs self-localization measurements at specific intervals by alternating between transmission phases and reception phases, allowing the sensor to determine wheel position only when necessary, thereby significantly reducing energy consumption while maintaining adequate localization accuracy
Solution Approach 2:
The system performs preliminary acceleration measurements and signal strength assessments before initiating full transmission and reception sequences. By evaluating basic motion parameters first, the system can determine whether complete self-localization procedures are necessary, avoiding unnecessary energy-consuming operations when wheel position can be inferred from simpler measurements
2Measurement precision
If complex coding and identification techniques are implemented to differentiate sensor emissions, then wheel differentiation capability is improved, but device complexity and cost increase
Solution Approach 1:
The system uses the vehicle's existing motion characteristics (acceleration patterns, signal strength variations due to antenna radiation patterns) as natural identification markers. Each wheel's position is determined by analyzing how its sensor signals vary during vehicle motion, eliminating the need for separate coding schemes or identification hardware. The motion itself provides the differentiation key
Solution Approach 2:
The patent exploits changes in signal parameters (acceleration values, signal strength, timing) that occur naturally during vehicle motion to differentiate between wheels. Instead of implementing fixed complex codes, the system analyzes dynamic parameter variations that are unique to each wheel's position and motion state, achieving differentiation through physical parameter changes rather than computational coding
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 accurate and exhaustive self-localization of electronic units, improving energy efficiency and extending battery life by optimizing transmission and reception strategies based on wheel position, while using low-frequency signals to reduce energy consumption.
Implementation Method 1
each electronic unit being equipped to measure acceleration
Data Source
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AI summary
The invention relates to a method for the self-localization of a data acquisition sensor fitted to a wheel, including a tire, of a vehicle comprising a plurality of wheels (200) and equipped with a system including an electronic housing (300) and a data acquisition sensor placed in each tire, equipped with a radio frequency transmitter for the purpose of wirelessly transmitting said data to a central transmitting and receiving module (100) located on the axle or chassis of the vehicle. The central transmitting and receiving module (100) receives and decodes the information signals emitted by the transmitters of each wheel. Each electronic housing (300) is equipped to measure acceleration. The method is notable in that it consists of determining the front and rear of a tire by measuring acceleration. Applications: self-localization of wheel sensors.