Non-contact Power Unit State Notification During Charging Intervals
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Solution Overview
Problem
In noncontact power feeding systems, users face challenges in accurately determining the state of electronic units during charging due to discontinuous notification operations between charging and non-charging periods, leading to potential misinterpretation of unit states.
Innovation Solution
The system employs an electronic unit with an electricity reception section that receives power using a magnetic or electric field, a secondary battery for charging, and a state notification section that provides unit state information both during charging and non-charging periods using received power, preventing unnatural discontinuities in notification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power transmission is performed in a time-divisional manner with charging periods and non-charging periods, then power reception efficiency is improved, but notification continuity deteriorates causing discontinuous notification operation
Solution Approach 1:
The notification section is configured to maintain notification operation during non-charging periods by utilizing stored power or alternative power sources, preparing the notification system in advance to ensure continuous operation without interruption when power transmission switches between charging and non-charging periods
Solution Approach 2:
A power storage component (such as a capacitor or small battery) is introduced as an intermediary element to bridge the power supply gap during non-charging periods, allowing the notification section to operate continuously without direct dependence on real-time power transmission
2Loss of energy
If notification operation is stopped during non-charging periods to save power, then power consumption is reduced, but user convenience deteriorates due to inability to determine unit state
Solution Approach 1:
The notification section operates periodically during non-charging periods rather than continuously, providing status updates at regular intervals to maintain user awareness while consuming minimal power, thus balancing power consumption reduction with user convenience
Solution Approach 2:
The notification system utilizes residual power in the power storage component or harvests minimal power during non-charging periods to maintain basic notification functionality, allowing the system to serve itself without requiring additional power input from the user
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 ensures continuous and accurate notification of the unit state, enhancing user convenience by preventing misinterpretation and maintaining seamless power transmission using magnetic or electric fields.
Implementation Method 1
An electromagnetic induction method is well known as a method of performing power supply in such a noncontact manner
Implementation Method 2
attention is further focused on a noncontact power feeding system adopting a method referred to as magnetic resonance method using an electromagnetic resonant phenomenon
Data Source
AI summary
An electronic unit includes an electricity reception section that receives power transmitted using one of a magnetic field and an electric field, a secondary battery that is charged based on a received power received by the electricity reception section, and a state notification section that provides notification to outside as to a state of its own unit. A charging period during which the secondary battery is charged based on the received power and a non-charging period are set in a time-divisional manner. The state notification section notifies of the unit state based on the received power in both of the charging period and the non-charging period.