Electroactive Polymer Skin Elasticity Analyzer
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Solution Overview
Problem
Current devices for analyzing skin elasticity are limited in their ability to provide detailed, multi-directional measurements across extended lengths of skin, as they often require complex equipment and are not suitable for clinical or home settings, and existing methods fail to capture variations in elasticity across different linear locations and directions.
Innovation Solution
A surface analysis device with a two-dimensional array of actuators and sensors that induce deformations and measure forces across multiple linear sections of the skin, allowing for simultaneous or sequential measurement of elasticity in various directions, utilizing electroactive polymer materials for actuation and sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex laboratory equipment is used to measure skin elasticity, then measurement precision is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent replaces complex mechanical laboratory equipment with a simplified system using electroactive polymer actuators and force sensors. The electroactive polymers convert electrical signals directly to mechanical deformation, eliminating the need for complex mechanical actuation systems while maintaining measurement precision through direct force application and sensing.
Solution Approach 2:
The patent changes the operational parameters by using small-scale electroactive polymer actuators that can be driven by electrical signals rather than complex mechanical systems. This parameter change enables the device to be miniaturized and made suitable for clinical and home settings while maintaining the ability to measure skin elasticity accurately through controlled electrical actuation.
2Device complexity
If single-point elasticity measurement is performed, then device complexity is reduced, but measurement precision deteriorates due to inability to capture directional variations
Solution Approach 1:
The patent segments the measurement system into multiple independent actuator-sensor pairs arranged in different orientations. Each pair measures elasticity in its specific direction, and the combined data from multiple segments provides comprehensive multi-directional elasticity characterization, resolving the limitation of single-point measurements.
Solution Approach 2:
The patent transitions from single-point measurement to multi-point spatial measurement by arranging actuators and sensors in two-dimensional arrays with different orientations. This adds the spatial dimension to the measurement system, enabling capture of directional elasticity variations across the skin surface while maintaining relatively simple device architecture.
3Measurement precision
If multiple actuators and sensors are used to measure elasticity across multiple linear sections, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent makes each actuator-sensor pair multi-functional by designing them to operate in different orientations and positions within the array. The same basic unit structure serves multiple measurement functions depending on its orientation and activation pattern, reducing overall device complexity while enabling comprehensive multi-directional elasticity measurement.
Solution Approach 2:
The patent implements dynamic control of the actuator array, where different subsets of actuators and sensors are activated based on the specific measurement requirements. This dynamic activation pattern allows the system to adapt to different measurement scenarios without requiring all elements to be permanently configured for every possible measurement type.
4Ease of operation
If small-scale device is used for practicality and miniaturisation, then ease of operation is improved, but measurement precision deteriorates due to limited measurement coverage
Solution Approach 1:
The patent uses flexible substrates to mount the electroactive polymer actuators and force sensors, allowing the device to conform to the skin surface. This flexibility enables the small-scale device to maintain good contact and measurement coverage across curved skin surfaces, preserving measurement precision while benefiting from miniaturization for practical clinical and home use.
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 detailed and insightful analysis of skin elasticity with a small form factor, capable of providing a richer set of data on skin anisotropy, durability, and aging, suitable for both clinical and home use, while minimizing equipment complexity and cost.
Implementation Method 1
at least a first surface interaction element operable to perform an actuation function... utilizing electroactive polymer materials for actuation and sensing
Implementation Method 2
at least a second surface interaction element operable to perform a pressure sensing function... control the second surface interaction element to measure a pressure and/or force exerted by the receiving surface
Data Source
Figure 1~3
Figure 4(a)~5(b)
Figure 6(a)~7(c)
AI summary
The invention provides a surface analysis device for application to a receiving surface to enable analysis of at least one measure of an elasticity of said surface across multiple different linear stretches or sections of the surface. The device includes a two- dimensional arrangement of actuators and sensors, comprising at least one actuating element, at least one sensing element, and at least one further sensing or actuating element. Selected sets of two or more of these elements are activated together by a controller, each set including at least one actuator and one sensor, to thereby obtain a measure of elasticity between each actuator and sensor pair in the set. Elasticity measures are obtained based on stimulating a deformation in the receiving surface at the actuator site, and measuring a resultant pressure and/or force exerted by the receiving surface at a further displaced point. Sensors may monitor a change in the exerted pressure and/or force for example.