Frequency-Controlled Transducers for Localized Energy Delivery
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Solution Overview
Problem
In applications with limited space, such as implantable or insertable catheters, there is a need for localized transducer addressing and energizing without the bulkiness of multiple independent power paths, requiring a method to selectively control energy flow and deposition in space and time.
Innovation Solution
The approach involves adjusting the frequency of an AC electromagnetic input signal to select an energy flow path and control energy delivery using a single main-line, where resonators along the line resonate at specific frequencies, allowing only matching resonators to energize transducers, while off-resonance resonators reflect the signal, enabling variable frequency control of transducer energization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple independent power paths are used to address and energize transducers at different locations, then localized transducer control is achieved, but device bulkiness and complexity increase
Solution Approach 1:
Multiple resonators are coupled to a single shared main-line, merging multiple power paths into one. Each resonator is tuned to a different frequency, allowing selective energization of transducers at different locations along the catheter by adjusting the input signal frequency, thereby eliminating the need for multiple independent power lines
Solution Approach 2:
The system changes the frequency parameter of the electromagnetic input signal to selectively address different resonators. By tuning the input frequency to match the resonant frequency of a specific resonator, energy is delivered to the corresponding transducer location, enabling localized control without multiple power paths
2Ease of operation
If multiple independent power paths are used for transducer addressing, then selective energy delivery is achieved, but the number of power lines increases
Solution Approach 1:
Multiple resonators are coupled to a single shared main-line, merging multiple power paths into one. Each resonator is tuned to a different frequency, allowing selective energization of transducers at different locations along the catheter by adjusting the input signal frequency, thereby eliminating the need for multiple independent power lines
Solution Approach 2:
The single main-line serves multiple functions by coupling to multiple resonators with different frequency responses. It can deliver energy to any transducer location along the catheter by adjusting the input frequency, making the single line universally applicable for addressing all transducers rather than requiring dedicated lines for each
3Ease of operation
If frequency selective resonators are used along a main-line, then transducer energization control is improved, but device complexity increases
Solution Approach 1:
The system changes the frequency parameter of the electromagnetic input signal to selectively address different resonators. By tuning the input frequency to match the resonant frequency of a specific resonator, energy is delivered to the corresponding transducer location, enabling localized control without multiple power paths
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 method reduces the number of input power lines, enables fast operating times, and allows for precise control of energy delivery to specific locations along the catheter or similar devices, facilitating efficient energy distribution and heat or vibration generation.
Implementation Method 1
resonators along the line resonate at specific frequencies, allowing only matching resonators to energize transducers, while off-resonance resonators reflect the signal
Implementation Method 2
facilitating efficient energy distribution and heat or vibration generation
Data Source
AI summary
Localized heating can use a fixed-frequency planar transmission line resonators arranged along a main-line, selected by tuning an electromagnetic input signal frequency applied to the main line for depositing heat in an adjacent active substrate. More generally, adjusting input signal frequency can be used to selectively address and energize an electromagnetic-to-heat, an electromagnetic-to-vibration, or other transducer to controllably direct energy toward a desired transducer load. Resonators or other electromagnetically energized transducers can be arranged to electromagnetically interfere, such that specifying or adjusting a relative phase of applied electrical signals can be used to specify or adjust the energy directed toward a desired transducer load. Temperature sensing can characterize a material in a target region near the transducer. A cold-hot-cold temperature profile can better manage temperature and avoid overheating a dielectric material such as the active substrate material.