Curved Support Structure for Resistive Sensor Decoupling
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Solution Overview
Problem
Existing deformable electronic devices face challenges in reliably incorporating resistive sensors that can function consistently during stretching or deformation without compromising the device's flexibility.
Innovation Solution
A deformable apparatus is designed with a curved support structure that decouples resistive sensors from the deformation of the substrate, using a polymer layer and electrodes to limit sensor deformation, allowing for reliable sensing even when the device is stretched or bent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resistive sensors are incorporated into a deformable apparatus, then sensing capability is provided, but the sensors cannot perform reliably during stretching or deformation
Solution Approach 1:
The apparatus is divided into two distinct structural domains: a deformable substrate that can be stretched and bent, and a separate curved support structure that remains relatively stable. The resistive sensor is positioned on the curved support structure rather than directly on the deformable substrate, creating a segmentation that isolates the sensor from harmful deformations while allowing the overall apparatus to be deformable.
Solution Approach 2:
The curved support structure acts as an intermediary element between the deformable substrate and the resistive sensor. This intermediary structure absorbs and decouples the mechanical stress from the sensor, allowing the sensor to remain relatively stable while still being part of the deformable apparatus. The curved support structure mediates between the conflicting requirements of sensor stability and apparatus deformability.
2Reliability
If sensors are incorporated into the deformable substrate, then sensing function is achieved, but the ability of the apparatus to be stretched repeatedly is affected
Solution Approach 1:
The sensor assembly is segmented from the deformable substrate by placing it on a separate curved support structure. This segmentation allows the substrate to undergo repeated stretching cycles without directly transmitting deformation stress to the sensor, thereby extending the duration and repeatability of the apparatus's mechanical action while maintaining continuous sensing function.
Solution Approach 2:
The curved support structure provides beforehand cushioning by being positioned between the deformable substrate and the resistive sensor. This cushioning structure absorbs mechanical stress before it reaches the sensor, protecting the sensor from damage during repeated stretching operations and ensuring long-term reliability of both sensing function and mechanical repeatability.
3Measurement precision
If the curved support structure is spaced from the deformable substrate, then sensor deformation is limited, but the device complexity increases
Solution Approach 1:
The support structure is formed with a curved geometry that naturally distributes and decouples mechanical stress from the resistive sensor. This curvature allows the support structure to accommodate substrate deformation while maintaining sensor stability, achieving improved measurement precision without requiring complex active control mechanisms or multiple rigid support elements.
Solution Approach 2:
The curved support structure is implemented as a flexible element that can bend and deform along with the substrate to some extent, yet maintains its curvature to protect the sensor. This flexible support structure achieves stress decoupling with minimal added complexity, avoiding the need for rigid, complex support mechanisms while still limiting sensor deformation to maintain measurement accuracy.
Data Source
AI summary
An apparatus and method wherein the method comprises: a deformable substrate; a curved support structure configured to support at least a portion of a resistive sensor wherein the resistive sensor comprises a first electrode, a second electrode and a resistive sensor material provided between the electrodes; at least one support configured to space the curved support structure from the deformable substrate so that when the deformable substrate is deformed the curved support structure is not deformed in the same way; wherein the resistive sensor is positioned on the curved support structure so as to limit deformation of the resistive sensor when the deformable substrate is deformed.