Adaptive Wearable Sensor Spring Module for Stable Skin Contact
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Solution Overview
Problem
Conventional wearable devices with electronic sensors face challenges in maintaining stable contact with the skin, leading to inadequate sensor measurement readings due to movement and external interferences, and often suffer from poor user comfort and exposure to ambient light.
Innovation Solution
The development of adaptive wearable devices with a spring module that adjusts the sensor position in response to movement, combined with a polymer material for friction and protection, ensuring optimal skin contact and accurate physiological measurements without adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensors are mounted on rigid circuit boards in conventional wearable devices, then the device structure is simple and easy to manufacture, but the sensor cannot maintain stable contact with the skin during user movement
Solution Approach 1:
The sensor assembly is made dynamic by introducing a spring mechanism that allows the sensor to move relative to the device body. This enables the sensor to adapt its position and maintain optimal contact pressure with the skin during user movement, transforming the rigid sensor mounting into a flexible, adaptive system that responds to mechanical deformation
Solution Approach 2:
The device is segmented into distinct functional modules: a movable sensor assembly, a spring mechanism, and a device body. This segmentation allows the sensor assembly to be independently positioned and adjusted via the spring, separating the sensor's contact function from the device's structural framework and enabling stable measurements without compromising overall device simplicity
2Reliability
If the device applies high pressure against the skin to maintain sensor contact, then measurement stability improves, but blood circulation in vessels is interfered with
Solution Approach 1:
The spring mechanism acts as a mechanical feedback system that automatically adjusts sensor pressure based on skin surface variations and movement. The spring's elastic properties provide continuous pressure regulation, maintaining optimal contact force without exceeding thresholds that would harm blood circulation, thereby eliminating the need for excessive manual pressure application
3Reliability
If adhesive is used to attach the sensor to the skin, then contact stability improves, but user comfort decreases and skin irritation may occur
Solution Approach 1:
The chemical bonding mechanism of adhesives is replaced with a mechanical spring-based pressure system. The spring provides continuous mechanical pressure to maintain sensor contact with the skin, eliminating the need for adhesives that cause discomfort or irritation, while still achieving stable measurements through controlled mechanical force
4Measurement precision
If the photodetector is exposed to ambient light, then the device structure is simple, but measurement accuracy deteriorates due to light interference
Solution Approach 1:
A flexible housing or thin-film cover is introduced to enclose the photodetector, creating a light-tight barrier that blocks ambient light interference. This flexible enclosure integrates smoothly with the wearable device structure, protecting the photodetector from external light while maintaining the device's form factor and 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
The adaptive wearable devices provide stable and consistent sensor readings, improving accuracy and user comfort by maintaining optimal pressure and protecting the sensors from environmental factors.
Implementation Method 1
The improved structure includes a spring module that responds to movements of the device and/or user and adjusts the position of the sensor accordingly
Implementation Method 2
The adaptive wearable device includes an improved structure that adjusts the position of an enclosed sensor in response to movement to maintain the relative position of the sensor against the skin of the user
Implementation Method 3
The polymer material may have a slightly sticky exterior, which provides friction against the skin and thereby helps maintain the relative position of the sensor against the skin
Implementation Method 4
Conventional wearable devices comprising electronic hardware including sensors are not always optimal... Reliable measuring (e.g., photoplethysmography (PPG)...
Data Source
AI summary
Provided are adaptive wearable devices that measure physiological conditions, methods of operating the device, and computer programs for use with the device. The adaptive wearable device provides improved reliability in data due to the adaptive structure and can be made waterproof with the incorporation of a polymer material. In the context of a wearable device, an apparatus is provided that includes a support structure configured to at least partially enclose the torso or an appendage of a user, a spring module disposed on the support structure, a first section of flexible circuitry disposed on the spring module and a first sensor disposed on the spring module and configured to monitor the user.