Layered Polymer Dental Heating Device with Frequency-Selective Transducers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies lack materials that can efficiently transduce AC electromagnetic input signals into localized heat in substrates, regardless of frequency-tuning for selecting heating locations.
Innovation Solution
Development of a compounded plastic material with specific properties, such as low electrical conductivity and high loss tangent, by incorporating additives like barium titanate and carbon into a polyurethane base resin, allowing for frequency-controlled localization of heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional polymer materials are used as substrate, then electrical insulation is provided, but efficient transduction of AC electromagnetic energy into localized heat is not achieved
Solution Approach 1:
The patent applies composite materials by incorporating barium titanate and carbon additives into a polyurethane base resin to create a compounded plastic material that efficiently transduces AC electromagnetic energy into localized heat while maintaining substrate integrity
Solution Approach 2:
The patent changes the electrical and thermal parameters of the polymer substrate by adding specific additives (barium titanate and carbon) to achieve the desired loss tangent and electrical conductivity properties for efficient electromagnetic energy transduction
2Power
If high loss tangent material is used to increase heat generation, then electromagnetic energy conversion efficiency improves, but risk of substrate melting increases
Solution Approach 1:
The patent optimizes the loss tangent parameter to a specific range (0.3 to 0.7) that balances efficient electromagnetic energy conversion with substrate temperature control, preventing melting while achieving desired heating效果
Solution Approach 2:
The patent creates localized heat generation at specific sites within the substrate rather than uniform heating, allowing controlled heat gradients that prevent overall substrate overheating and melting
3Manufacturing precision
If frequency-tuning is used to select heating locations, then spatial precision of heat generation improves, but device complexity increases
Solution Approach 1:
The patent replaces mechanical or electronic switching systems with frequency-based selection, where different heating locations are activated by tuning the AC electromagnetic signal frequency to match resonant frequencies of specific regions in the substrate
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
The resulting plastic material effectively converts AC electromagnetic energy into localized heat within the substrate, enabling controlled heat generation and gradients without risking the substrate's melting point.
Implementation Method 1
the resulting plastic material effectively converts AC electromagnetic energy into localized heat within the substrate
Implementation Method 2
incorporating additives like barium titanate and carbon into a polyurethane base resin, allowing for frequency-controlled localization of heat generation
Data Source
AI summary
A lossy dielectric heat source transducer or other transducer can be formed using a multi-layer substrate, such as can include a power layer (to receive an applied electromagnetic input signal), a polyurethane or other polymeric electromagnetic energy absorption layer, and a coupling layer therebetween. The absorption layer can be doped with carbon or another dopant material to increase electromagnetic energy absorption. The coupling layer can be doped with barium titanate or another dopant material to focus electromagnetic energy passing through the coupling layer toward the absorption layer. Frequency-selective addressing of particular transducers can include using a plurality of planar resonators, which can be configured to resonate at the same or different specified frequencies of the applied electromagnetic input. Such addressing of such frequency-sensitive structures can permit location-specific actuation of one or more transducers.