Dynamically Formable EDA Sensor for Vehicle Cabin Input
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Solution Overview
Problem
Conventional biosensing devices for Electrodermal Activity (EDA) measurements require fixed electrodes adhered to the skin, making them unsuitable for use in passenger vehicle cabins where flexibility and user interaction are needed.
Innovation Solution
A dynamically formable electrodermal activity sensor using a soft robotics material with a formable surface and an EDA sensing layer, allowing for touch input and sensing without traditional electrodes, and incorporating a sensing module to evaluate connection strength and provide haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed electrodes are used for EDA measurement, then measurement reliability is improved, but device flexibility and ease of operation deteriorate
Solution Approach 1:
The patent employs dynamically formable soft robotics materials that can change their shape and conform to different surfaces. The electrode array is integrated into a flexible substrate that can be deformed to match the curvature of body parts or device surfaces, allowing reliable EDA measurements without fixed rigid electrodes. This dynamic adaptability resolves the contradiction by maintaining measurement reliability through consistent skin contact while improving ease of operation through flexible placement.
Solution Approach 2:
The patent uses flexible substrates and thin-film electrode structures that can be bent, folded, and conform to various shapes. The electrode array is mounted on a flexible base that maintains electrical contact with the skin while allowing the device to be easily positioned and removed. This flexible film approach eliminates the need for rigid fixed electrodes, simultaneously ensuring measurement reliability through continuous skin contact and improving ease of operation through flexible handling.
2Reliability
If traditional fixed electrodes are adhered to skin, then EDA sensing capability is improved, but adaptability to different applications deteriorates
Solution Approach 1:
The patent creates a universal EDA sensing platform where the same flexible electrode array can be applied to multiple body parts and device surfaces. The dynamically formable substrate can be configured for different applications such as wrist monitoring, finger sensing, or integration with wearable devices. This multi-functional design resolves the contradiction by maintaining reliable EDA sensing through proper electrode-skin contact while significantly improving adaptability across different use cases.
Solution Approach 2:
The dynamically formable nature of the electrode array allows it to adapt its shape to match the specific requirements of different applications. The soft robotics materials can be deformed to conform to various body contours or device geometries, enabling the same electrode array to serve multiple purposes. This dynamic adaptability resolves the contradiction by preserving EDA sensing capability while enhancing versatility across different applications.
3Productivity
If electrodes are affixed to user's skin, then EDA data collection capability is improved, but user comfort and ease of operation deteriorate
Solution Approach 1:
The patent employs flexible thin-film electrodes mounted on a compliant substrate that can be easily applied and removed without causing discomfort. The flexible nature of the electrode array allows it to move with the skin naturally, eliminating the restrictive feeling of traditional fixed electrodes. This flexible film design maintains effective EDA data collection through continuous skin contact while significantly improving user comfort and ease of operation.
Solution Approach 2:
The dynamically formable electrode array can adjust its shape and position to maintain optimal contact with the skin during various user movements and activities. This dynamic adaptation ensures continuous EDA data collection capability while preventing discomfort from rigid or misaligned electrodes. The soft robotics materials allow the electrode array to move flexibly with the body, resolving the contradiction between data collection effectiveness and user comfort.
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 seamless EDA data collection and user input without affixed electrodes, providing a conformable and adaptable interface for vehicle applications, enhancing user interaction and comfort.
Implementation Method 1
Embodiments may also utilize shape-changing materials, such as Liquid-Crystalline Elastomers (LCEs) to implement the touch input surfaces.
Implementation Method 2
an EDA sensing layer affixed to the formable surface of the dynamically formable base, the EDA sensing layer comprising a plurality of electrodes arranged on a flexible substrate and configured to be connected to a power supply
Data Source
AI summary
Dynamically adjustable EDA measurement device may include: a dynamically formable base comprising a soft robotics material, wherein the dynamically formable base comprises a formable surface configured to be dynamically formed in response to input signals; and an EDA sensing layer affixed to the formable surface of the dynamically formable base, the EDA sensing layer comprising a plurality of electrodes arranged on a flexible substrate and configured to be connected to a power supply; wherein, in response to input signals, the formable surface of the dynamically formable base and the EDA sensing layer affixed thereto are reformed into a desired contour.