Non-contact Charging System Obstacle Detection and Control
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Solution Overview
Problem
Existing non-contact power transmission systems fail to provide a method for a third party to safely remove obstacles between power transmission and receiving units while preventing magnetic field exposure, especially when the owner is not present to control the system.
Innovation Solution
A non-contact charging system with a power supply unit that includes an operation portion to temporarily stop or resume power transmission, an informing unit for visual confirmation of power transmission status, a warning unit for alerts, and a notification system to inform the owner of changes in power transmission state, allowing any authorized person to safely remove obstacles and resume power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-contact power transmission is performed continuously to maintain charging efficiency, then power transmission efficiency is improved, but magnetic field exposure to obstacles and persons increases
Solution Approach 1:
The system performs preliminary detection of transmission efficiency before full power transmission begins. When an obstacle is detected, the system preemptively stops power transmission before the obstacle can be significantly exposed to magnetic fields, preventing harmful effects while maintaining charging efficiency when no obstacles are present
2Reliability
If power transmission is stopped immediately when transmission efficiency drops to prevent magnetic field exposure, then safety is improved, but charging time increases
Solution Approach 1:
The system detects obstacles before they cause significant efficiency drops by monitoring transmission efficiency in real-time. When efficiency drops below a threshold, the system immediately stops power transmission, preventing both excessive magnetic field exposure and unnecessary charging interruptions
Solution Approach 2:
The system continuously monitors transmission efficiency and uses this feedback to control power transmission. When efficiency drops indicating an obstacle, the system stops transmission; when efficiency recovers, transmission resumes automatically, optimizing both safety and charging time
3Reliability
If obstacle removal requires the owner to be present and control the system, then system security is improved, but ease of operation deteriorates
Solution Approach 1:
The system automatically detects obstacles through transmission efficiency monitoring and stops power transmission without requiring owner intervention. The system also automatically resumes transmission when obstacles are removed, providing self-service functionality that maintains security while improving convenience
Solution Approach 2:
The operation portion is designed to be universally accessible to any person, not just the owner. This allows any authorized person to control power transmission stopping and resumption, making the system both secure (controlled access) and convenient (multiple users can operate)
4Productivity
If continuous power transmission is maintained to reduce charging time, then productivity is improved, but risk of metal obstacle heating increases
Solution Approach 1:
The system performs preliminary detection of metal obstacles by monitoring transmission efficiency before significant heating can occur. When efficiency drops indicating a metal obstacle, the system immediately stops power transmission, preventing the obstacle from generating harmful heat while minimizing impact on charging speed
Solution Approach 2:
The system uses periodic monitoring of transmission efficiency to detect obstacles. By continuously checking efficiency at regular intervals, the system can quickly detect metal obstacles and stop transmission before they heat up, balancing safety with charging 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
Enables safe removal of obstacles by any authorized person, reduces labor for the owner, and prevents prolonged warnings or exposure to magnetic fields, ensuring efficient and safe operation of non-contact power transmission.
Implementation Method 1
a power transmission unit, installed on a flat surface, configured to transmit power to the power receiving unit in a non-contact manner
Data Source
AI summary
A non-contact charging system includes: a power receiving unit mounted on a transportation device; a power transmission unit, installed on a flat surface, configured to transmit power to the power receiving unit in a non-contact manner; and a power supply unit configured to control power supply to the power transmission unit, the power supply unit including an operation portion configured to temporarily stop or resume non-contact power transmission from the power transmission unit to the power receiving unit.