Bilateral Power Feed System for Deep-Tissue Implants
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Solution Overview
Problem
Existing methods for wirelessly supplying power to deep-tissue implants face challenges in focusing and penetrating power transmission waves into the body, requiring strongly coupled magnetic resonance and bilateral power transmission systems, which struggle to deliver stable and sufficient power.
Innovation Solution
A power feed system utilizing a sandwiching method with a pair of electrodes on the body surface, generating a potential difference to facilitate stable power transmission to deep implants, including a high-frequency alternating voltage applied between electrodes, a resonance circuit, and a booster rectifier circuit to efficiently supply power without the need for a battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a one-side power transmission method using magnetic resonance is used, then wireless power supply is achieved, but energy diffuses in every direction and cannot penetrate deep into the body
Solution Approach 1:
The power transmission system is segmented into two separate transmission sources positioned on opposite sides of the body. Each transmitter independently generates electromagnetic energy that converges at the deep-tissue implant location, transforming the single-direction diffuse transmission into focused bidirectional convergence, thereby enabling deep penetration while reducing energy waste.
Solution Approach 2:
The system transitions from one-dimensional linear transmission to three-dimensional spatial convergence by positioning transmitters on both sides of the body. The electromagnetic energy fields from both sides intersect and converge at the target depth, creating a focused power delivery zone that overcomes the depth limitation of conventional single-side transmission.
2Temperature
If a bilateral power transmission system is used to achieve deep tissue power supply, then power transmission to deep implants is possible, but the system requires strongly coupled magnetic resonance and cannot focus low output power transmission waves
Solution Approach 1:
The system changes the operational parameters by using independent low-power transmission sources on both sides rather than requiring strong coupling between single high-power sources. This parameter change allows the use of simpler, lower-output transmitters that collectively achieve deep tissue penetration through their combined convergent fields, eliminating the need for complex strongly coupled magnetic resonance systems.
3Volume of moving object
If the electronic device is made small by removing the battery, then device size is reduced, but stable and sufficient power supply to deep implants becomes difficult
Solution Approach 1:
The implantable electronic device is designed to be self-powered by harvesting electromagnetic energy from the external transmission system. The device contains no battery or energy storage component, yet maintains stable operation by continuously receiving focused power delivery from the bilateral transmission system, thereby achieving both miniaturization and reliable power supply.
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 stable and efficient power supply to deep-tissue implants, allowing for smaller device sizes and effective operation of various implantable devices like LEDs and artificial organs, while minimizing thermal risks and resistance.
Implementation Method 1
a power source that applies a high frequency alternating voltage between the pair of electrodes
Implementation Method 2
these techniques require strongly coupled magnetic resonance for stable power transmission to the deep part of a living body
Data Source
AI summary
[Problem] To provide a power feed system that supplies electric power via electromagnetic waves to an implant embedded in a deep part of a living body, using a sandwiching method in which a potential difference is generated using a pair of electrodes, by disposing an implant electronic device between a power transmission side electrode and a power reception side electrode.[Solution] It is provided with: a pair of electrodes (a first surface electrode 3 and a second surface electrode 4) stuck onto a surface of a living body 6; an implant electronic device 2 that includes a first body internal electrode 30 and a second body internal electrode 40 and in which the first body internal electrode 30 and the second body internal electrode 40 are fixed to respective positions having different potential differences in the living body 6; and a high frequency AC power source 5 that applies a high frequency alternating voltage to the first surface electrode 3 and the second surface electrode 4.