Wearable Sensor Actuator for Tissue Variability
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Solution Overview
Problem
Existing wearable devices face challenges in collecting consistent data due to variability in human tissue properties, which affects the accuracy of measurements such as temperature and heart rate.
Innovation Solution
A device for measurements in wearable devices, comprising a support for a human appendage, at least one light source, at least one light detector, and an actuator to move the light source or detector to different measurement positions, allowing for the collection of data across various tissue types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wearable device sensor uses fixed light source and detector positions, then the device structure is simple, but measurement precision is reduced due to tissue variability
Solution Approach 1:
The patent implements dynamic positioning of light sources and detectors using actuators that can move these components to multiple predefined positions around the body part. This allows the measurement system to adapt to different tissue characteristics by selecting optimal positions, thereby improving measurement precision while maintaining a relatively compact device structure through controlled mobility rather than fixed multiple sensors
Solution Approach 2:
The measurement system is divided into separable light source and detector modules that can be independently positioned at multiple locations. This segmentation allows flexible configuration where each module can be optimally placed for different measurement scenarios, improving accuracy without requiring a completely complex integrated structure
2Measurement precision
If multiple measurement positions are used, then data accuracy is improved, but measurement time increases
Solution Approach 1:
The system pre-defines multiple optimal measurement positions around the body part before actual measurement begins. The actuators are pre-programmed with position coordinates, and the measurement sequence is pre-planned, allowing rapid switching between positions without manual intervention or recalculation, thus reducing the time penalty associated with multi-position measurements
Solution Approach 2:
The measurement process uses periodic scanning or sampling at multiple positions in a systematic sequence. Rather than continuously moving or randomly selecting positions, the system periodically visits predefined locations in an optimized pattern, collecting sufficient data for accurate measurement while minimizing total measurement time through efficient periodic sampling
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
This solution enables the collection of a plurality of measurement results for different human tissues with various settings, aiding in the optimization of light source and detector placement, and wavelength selection for improved data accuracy in wearable devices.
Implementation Method 1
at least one light source; at least one light detector... collecting information relating to light detected by the at least one light detector
Data Source
AI summary
In accordance with an example embodiment, there is provided a device for measurements for a wearable device sensor, the device comprising: a support configured to receive an appendage of a human body; at least one light source; at least one light detector; and an actuator configured to move the at least one light source, or the at least one light detector, or both to at least two different measurement positions in relation to the support.