Magnetic Resonance TPMS Charging Control for Intermittent Power Transfer
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Solution Overview
Problem
Existing tire pressure monitoring systems (TPMS) face challenges in efficiently and stably charging batteries due to intermittent wheel rotation and changing transmission distances, leading to complex equipment configurations and instability in power transmission.
Innovation Solution
A magnetic resonance wireless power transmission system with a transmitter and receiver, controlled by measuring valid charging time and length to maintain optimal power transmission within preset ranges, using frequency, duty ratio, and DC input voltage adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transmission is used for TPMS battery charging, then the system can operate without wire charging, but the power transmission becomes unstable due to intermittent wheel rotation and changing transmission distances
Solution Approach 1:
The patent applies dynamics by making the transmission power adjustable and controllable based on real-time charging status feedback. The system dynamically adjusts transmission power levels (first power level and second power level) according to the measured charging status, which varies with wheel rotation and transmission distance, thereby maintaining stable power transmission under intermittent charging conditions
Solution Approach 2:
The patent implements feedback control by measuring the charging status of the battery and using this information to control the transmission power. The receiver measures the charging status and transmits this information to the transmitter, which then adjusts the transmission power accordingly. This closed-loop feedback mechanism ensures stable power transmission despite variations in wheel rotation and transmission distance
2Duration of action of stationary object
If existing methods (changing sensing signal transmission cycle, using electromotive force) are used to increase battery lifespan, then battery lifespan can be extended, but the equipment configuration becomes complex and large
Solution Approach 1:
The patent applies self-service by enabling the TPMS system to charge its own battery using the vehicle's existing wireless power transmission infrastructure. The system utilizes the vehicle's motion (wheel rotation) to generate power through electromagnetic induction, eliminating the need for additional complex charging equipment. The TPMS controller itself manages the charging process by monitoring battery status and controlling power reception, making the system self-sufficient
Solution Approach 2:
The patent implements universality by using the vehicle's existing wireless power transmission system (originally designed for other purposes) to also charge the TPMS battery. The same electromagnetic induction mechanism used for vehicle power transmission is utilized to charge the TPMS battery during wheel rotation. This multi-functional approach avoids adding separate dedicated charging equipment, thereby reducing system 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
Stable and efficient power transmission to TPMS batteries, regardless of vehicle speed, by controlling charging time and length, addressing instability and complexity in intermittent charging environments.
Implementation Method 1
a magnetic resonance wireless power transmission and reception system including a transmitter Tx installed on one side of a device and a receiver Rx installed on the other side
Data Source
AI summary
The present invention relates to a wireless power transmission or reception system for measuring a valid charging time in which a voltage value measured by a reception unit is equal to or greater than a pre-configured voltage value, and controlling transmission power so that the valid charging time is included in a pre-configured target charging time range.