Dual Receiver Detection Grid for Coil Alignment in Wireless Charging
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies due to misalignment of receiver coils in mobile devices and charging pads, leading to reduced charging efficiency and user inconvenience.
Innovation Solution
A dual receiver detection apparatus and method utilizing a movable transmitter with a detection grid and controller to apply detection signals, receive echo signals, compare them with predetermined patterns, determine the number and alignment of receivers, and charge them sequentially for optimal alignment and efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed transmitter coil is used in the charging pad, then the device structure is simple, but the alignment with receiver coils is inaccurate leading to reduced charging efficiency
Solution Approach 1:
The transmitter coil is made movable within the charging pad, allowing it to dynamically adjust its position to align with receiver coils. The controller moves the transmitter coil to detected receiver locations, transforming a static structure into a dynamic one that adapts to different charging scenarios, thereby resolving the contradiction between structural simplicity and charging efficiency.
2Adaptability or versatility
If the charging pad supports multiple mobile phones, then the versatility is improved, but the difficulty of detecting and measuring receiver positions increases
Solution Approach 1:
The detection process is segmented into multiple scanning phases. The controller systematically scans different regions of the charging pad in a predetermined pattern, dividing the complex task of detecting multiple receivers into manageable sequential steps. This segmentation allows the system to handle multiple devices without overwhelming the detection mechanism.
Solution Approach 2:
The system performs preliminary detection actions by scanning for receivers before initiating power transfer. The controller预先 applies detection signals and identifies receiver positions and quantities in advance, allowing the system to plan the charging sequence and transmitter movement path beforehand, thus simplifying the overall detection challenge.
3Device complexity
If manual alignment is required for optimal charging, then the device complexity is reduced, but the ease of operation deteriorates due to alignment difficulty
Solution Approach 1:
The system performs self-alignment by automatically detecting receiver positions and moving the transmitter coil accordingly. The controller executes the alignment process autonomously based on detection results, eliminating the need for manual user intervention. This self-service capability resolves the contradiction by removing the alignment burden from the user while keeping the device structure relatively simple.
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
Ensures accurate and efficient charging of multiple mobile devices by determining the number and alignment of receivers, allowing for precise alignment of the transmitter coil with each receiver coil, thereby enhancing charging efficiency and user convenience.
Implementation Method 1
The primary side transmitter is magnetically coupled to the secondary side receiver through a magnetic coupling. The magnetic coupling may be implemented as a loosely coupled transformer having a primary side coil formed in the primary side transmitter and a secondary side coil formed in the secondary side receiver.
Implementation Method 2
A dual receiver detection apparatus and method utilizing a movable transmitter with a detection grid and controller to apply detection signals, receive echo signals, compare them with predetermined patterns, determine the number and alignment of receivers
Data Source
AI summary
A method includes applying a plurality of detection signals to a plurality of receivers, receiving a plurality of echo signals resulted from the plurality of receivers, comparing the plurality of echo signals with a predetermined echo signal distribution pattern, determining the number of the plurality of receivers, and charging the plurality of receivers sequentially using a movable transmitter.