Multi-Point Tire Sensor Array for Road Surface Detection
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Solution Overview
Problem
Existing tire monitoring systems rely on a single sensor attached to the inner surface of a tire, which limits the precision in detecting tire and road surface conditions, posing safety concerns, especially in autonomous driving scenarios where comprehensive and real-time data is crucial for vehicle control and safety.
Innovation Solution
A systematized multi-point sensors unit comprising multiple sensors arranged perpendicular to the tire's travel direction, connected via a wire, with a main sensor module for wireless data transmission and a power supply element, and sub-sensor modules for shared data and power, utilizing an energy harvester to enhance energy efficiency and reduce weight, and an integral film to prevent air pressure leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are attached to the inner surface of the tire to improve detection precision, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensor system is divided into a main sensor module and multiple sub-sensor modules. The main module handles wireless communication and power management, while sub-modules focus on specific sensing functions. This segmentation allows multiple sensors to be deployed for improved measurement precision while distributing system complexity across modular components, making the overall system more manageable and less complex than a fully integrated multi-sensor system.
2Measurement precision
If sensors are arranged in a line perpendicular to the traveling direction to improve road surface identification, then measurement precision is improved, but the number of sensors required increases
Solution Approach 1:
The sensor modules are designed to perform multiple functions: detecting tire internal conditions (pressure, temperature), monitoring road surface characteristics through acceleration data, and providing structural support for wireless power transfer. By making each sensor module multi-functional, the system achieves improved road surface identification precision without needing to add separate dedicated sensors for each function, thereby reducing the total number of sensors required.
3Device complexity
If a main sensor module with wireless transmission is used to reduce the number of sensors, then device complexity is reduced, but power consumption increases
Solution Approach 1:
The system implements periodic wireless power transfer through magnetic coupling between the main sensor module and external power sources. Instead of continuous power consumption, the sensor modules receive power in periodic bursts through inductive coupling, significantly reducing overall power consumption while maintaining wireless communication capabilities. This periodic power transfer mechanism allows the system to operate with lower energy requirements compared to continuous power supply arrangements.
Data Source
AI summary
A systematized multi-point sensors unit for a tire and a tire having the same are provided. More specifically, the systematized multi-point sensors unit includes: a sensor module composed of a plurality of sensors and attached onto an inner surface of a tire to monitor conditions of a tire and a road surface, and a connection member for connecting the plurality of sensors by wire, wherein the plurality of sensors are connected to each other by wire and arranged in a line in a manner of being perpendicular to a traveling direction of the tire.