Wireless Charging Pad Alignment via Vehicle Gradient Sensors
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Solution Overview
Problem
Wireless charging efficiency for vehicles is compromised due to difficulties in maintaining parallelism between the transmitting and receiving pads, especially when the vehicle's position changes due to aging, bumpy roads, or worn tires, affecting the interval and gradient alignment.
Innovation Solution
A method that utilizes sensors (yaw rate, gyro, and tire pressure) to calculate the vehicle's gradient and adjust the height or gradient of the receiving or transmitting pads to maintain parallelism and optimize the interval between them, adjusting transmission power and frequency accordingly to maximize efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle position changes due to aging, bumpy roads, or worn tires, then the parallelism between transmitting and receiving pads cannot be maintained, but adjusting the pad height or gradient increases system complexity
Solution Approach 1:
The receiving pad is designed with adjustable height and gradient capabilities, allowing it to dynamically adapt to changes in vehicle position caused by aging, bumpy roads, or worn tires. This dynamic adjustment mechanism enables the receiving pad to maintain parallelism with the transmitting pad despite external disturbances, resolving the contradiction between reliability and device complexity by making the system adaptable rather than static
Solution Approach 2:
Sensors detect the actual position and orientation of the receiving pad relative to the transmitting pad, and this feedback information is used to control the adjustment mechanism. The closed-loop feedback system automatically compensates for position changes, maintaining parallelism without requiring complex manual intervention or overly sophisticated mechanical structures
2Reliability
If the interval between transmitting and receiving pads is increased to accommodate vehicle position changes, then parallelism is compromised, but decreasing the interval reduces adaptability to position variations
Solution Approach 1:
The receiving pad's height and gradient are made dynamically adjustable to maintain an optimal, small interval with the transmitting pad while adapting to various vehicle positions. This allows the system to keep the interval minimized for efficient power transmission while simultaneously adapting to different position scenarios through active control
Solution Approach 2:
The system changes physical parameters (height and gradient) of the receiving pad to maintain both a small interval and proper parallelism with the transmitting pad. By adjusting these parameters based on detected position variations, the system achieves both high power transmission efficiency and adaptability to position changes
3Loss of energy
If sensors and adjustment mechanisms are added to maintain parallelism, then power transmission efficiency improves, but device complexity and cost increase
Solution Approach 1:
The system uses the vehicle's existing sensors (yaw rate, gyro, tire pressure) to detect position changes and automatically controls the receiving pad adjustment mechanism. This self-service approach allows the wireless charging system to maintain optimal alignment using resources already available in the vehicle, minimizing additional complexity and cost while improving power transmission efficiency
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
This approach enhances power transmission efficiency by ensuring parallel alignment and minimizing the interval between pads, exceeding preset tolerance levels, thereby improving charging efficiency and storing optimal settings for future charging sessions.
Implementation Method 1
wireless charger which is arranged as a charging pad in connection with magnetic resonance-based wireless charging
Data Source
AI summary
A method for controlling a wireless charging device includes: receiving information sensed by at least one of a yaw rate sensor, a gyro sensor, and a tire pressure sensor of a vehicle; calculating a longitudinal/transversal gradient of the vehicle according to the received information; and adjusting a height or a gradient of a receiving pad equipped in the vehicle or adjusting a height, a gradient, a transmission power, or a frequency of a transmitting pad corresponding to the receiving pad, based on the calculated longitudinal/transversal gradient.