Wearable Sweat Sensor Chronological Assurance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sweat sensing technologies face challenges in providing chronological assurance, as they lack the ability to accurately determine the sampling rate of new sweat or its solutes, leading to variable and unreliable data, especially in continuous monitoring applications, due to issues like contamination and diffusion, which hinders their widespread adoption beyond basic applications.
Innovation Solution
A wearable sweat sensor device that incorporates advanced interplays of chemicals, materials, sensors, microfluidics, algorithms, and computing to determine and ensure chronological assurance by measuring sweat sampling rate and generation rate, providing precise and reliable data on sweat solutes over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous sweat sampling is implemented, then monitoring capability is improved, but chronological assurance deteriorates due to variable sampling rates and contamination
Solution Approach 1:
The device segments the sweat sampling process into distinct functional zones: a first region for collecting sweat and a second region for collecting control fluid. This spatial segmentation allows independent control and measurement of sampling rates in each region, enabling the system to maintain chronological assurance while providing continuous monitoring across multiple time windows.
Solution Approach 2:
The device incorporates feedback mechanisms where the control fluid sampling rate is used to calculate and adjust the sweat sampling rate. The system continuously monitors and adjusts based on measured parameters, ensuring that the sampling rate remains within the required time window for maintaining chronological assurance while enabling continuous monitoring capability.
2Reliability
If sweat volume is reduced to improve sampling rate, then chronological assurance is improved, but measurement reliability deteriorates due to insufficient sample volume
Solution Approach 1:
The device dynamically adjusts the sweat sampling rate based on real-time conditions and required measurement precision. The system can vary the sampling rate within a range that ensures both chronological assurance and sufficient sample volume for reliable biomarker measurement, adapting to different monitoring needs and sweat production rates.
Solution Approach 2:
The system changes multiple parameters simultaneously including sweat sampling rate, control fluid sampling rate, and time window duration. By coordinating these parameter changes, the device maintains both chronological assurance and measurement reliability, allowing flexible adaptation to different application requirements without compromising either aspect.
3Reliability
If sampling rate is increased to improve chronological assurance, then time resolution is improved, but device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The control fluid serves multiple functions: it acts as a reference for calculating sweat sampling rate, provides a stable baseline for measurement, and enables the system to maintain chronological assurance. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while improving chronological assurance.
Solution Approach 2:
The control fluid acts as an intermediary substance that facilitates the measurement and calculation of sweat sampling rate. By using the control fluid as a reference, the system can determine chronological assurance without requiring complex direct measurement mechanisms, thus improving time resolution while keeping device complexity manageable.
Data Source
AI summary
Devices that sense sweat and are capable of providing chronological assurance are described. The device uses at least one sensor to measure sweat or its components and to determine a sweat sampling rate. The chronological assurance is determined, at least in part, using the sweat sampling rate. The sweat sampling rate may be determined, at least in part, using a sweat volume and/or a sweat generation rate, both of which may be measured or predetermined.