Position-Triggered Tire Sensing for Battery Life Extension
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Solution Overview
Problem
Tire information detection sensors installed in tires consume battery power rapidly due to frequent measurements, leading to shorter battery life, necessitating a reduction in measurement frequency to extend the service life of the power supply unit.
Innovation Solution
A tire information detection device with a detection unit on the tire's inner surface, a power supply unit, a position information detection unit, an additional information acquisition unit, a determination unit, and a control unit that controls measurements based on position-specific determination conditions, allowing measurements only when the tire is in predetermined areas, thereby reducing power consumption and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor performs frequent measurements to detect tire information accurately, then the measurement precision is improved, but the battery life deteriorates due to increased power consumption
Solution Approach 1:
The sensor performs measurements periodically based on position information rather than continuously. The control unit determines whether to activate the sensor based on whether the tire is in a predetermined area, creating a periodic measurement pattern that reduces power consumption while maintaining detection accuracy when needed.
Solution Approach 2:
The measurement function is activated selectively in specific locations (predetermined areas) rather than uniformly everywhere. The system applies different measurement behaviors based on local conditions - high measurement activity in areas of interest and low or no measurement activity in other areas, optimizing the balance between detection accuracy and power consumption.
2Use of energy by moving object
If the sensor reduces measurement frequency to extend battery life, then the power consumption is reduced, but the ability to detect tire information in timely manner deteriorates
Solution Approach 1:
Position information acts as an intermediary that triggers measurement activation. Instead of direct time-based control, the system uses position data to determine when measurements should occur, enabling intelligent timing that balances power savings with timely detection of tire information in critical areas.
Solution Approach 2:
The system pre-determines areas of interest and prepares measurement triggers in advance. By having predetermined areas ready and using position information to trigger measurements proactively when entering these areas, the system ensures timely detection without requiring continuous monitoring, thus reducing power consumption while maintaining response time.
Data Source
AI summary
A tire information detection device that detects tire information including at least one of wear, deformation, road surface state, ground contact state, presence/absence of failure, travel history, load state, or frictional coefficient, includes at least one detection unit disposed on a tire inner surface, a power supply unit to supply power to the detection unit, a position information detection unit to detect position information of the tire or a vehicle, an additional information acquisition unit to acquire additional information associated with the position information, a determination unit to determine whether a current position specified based on the position information is included in an area that satisfies a determination condition extracted from the additional information, and a control unit to control measurement of the detection unit based on a determination result from the determination unit.