Wearable UV Sensor Personalized Dose Limits
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Solution Overview
Problem
Current UV measuring systems are not accurate in various situations due to a mismatch between their spectral sensitivity and the erythema spectrum, and they do not account for individual variations in UV tolerance, leading to inappropriate UV dose limits and potential adverse effects.
Innovation Solution
A wearable UV sensing device and mobile application that measure UV exposure and dose, providing personalized UV dose limits based on historical data and symptom reports, with features like environmental correction, UVA/UVB separation, and real-time notification, to help users set safe UV thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional UV measuring systems are used, then UV exposure can be measured, but measurement precision is poor due to mismatch between spectral sensitivity and erythema spectrum
Solution Approach 1:
The patent segments the UV measurement into multiple spectral bands (UVA and UVB) by using multiple sensors with different spectral sensitivities. This allows separate measurement of different UV components that have different erythema weighting factors, improving overall measurement accuracy compared to single-sensor systems.
Solution Approach 2:
The system changes the measurement parameters by applying erythema weighting factors to the raw sensor measurements. The processed UV dose is calculated as a weighted combination of UVA and UVB measurements, where the weights correspond to their respective contributions to erythema, thereby aligning the measurement with human skin response.
2Adaptability or versatility
If fixed UV dose limits are applied, then simplicity is maintained, but adaptability is poor due to individual variations in UV tolerance
Solution Approach 1:
The system transitions from static, fixed UV dose limits to dynamic, user-selectable limits. Users can adjust their personal UV dose thresholds based on their individual tolerance, skin type, and activity level. The system adapts to each user's needs while providing guidance on appropriate limit settings.
Solution Approach 2:
The system enables users to self-determine their appropriate UV dose limits through an interactive selection process. Users are empowered to choose their own thresholds based on their personal characteristics and risk tolerance, reducing the need for complex automated determination algorithms.
3Reliability
If comprehensive UV monitoring is implemented, then reliability of UV dose assessment is improved, but loss of time increases due to multiple measurements and processing
Solution Approach 1:
The patent combines multiple sensor measurements (UVA and UVB) into a single processed UV dose value that represents the erythemally weighted exposure. This merging of multiple measurement streams into one comprehensive metric reduces the time required for data processing while maintaining high reliability.
Solution Approach 2:
The system performs preliminary weighting and aggregation of UV measurements in real-time as data is collected, rather than requiring post-processing of raw data. This preliminary action ensures that the UV dose calculation is ready for immediate use in alerting and monitoring functions.
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 system provides accurate and personalized UV exposure monitoring, enabling users to set safe UV dose limits, reducing the risk of adverse effects by accounting for individual tolerance and environmental factors.
Implementation Method 1
a UV sensor in a wearable UV sensing device
Data Source
AI summary
A computer executable method that can be stored in a memory, the method including: visually presenting on a display of a user device a history of UV dose that was calculated based on information sensed by a UV sensor in a wearable UV sensing device; visually presenting a percentile indicator on the display, the percentile indicator being indicative of a calculated percentile of the history of UV dose; and visually presenting on the display a user-adjustable UV dose threshold interface that is adapted to allow the user to interact with the user-adjustable UV dose interface and choose a user-chosen UV dose threshold quantity.