Multi-Sensor Wearable for Sunlight-Resistant Biological Measurement
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Solution Overview
Problem
Outdoor optical measurements are often hindered by sunlight, requiring additional equipment or user intervention, which is impractical for activities like mountain climbing or exercise where convenience and continuous measurement are essential.
Innovation Solution
A measurement apparatus comprising multiple optical sensors and a controller that can be worn on different body parts, selecting the optimal sensor based on output values to ensure accurate biological information measurement without saturation from sunlight, and incorporating features like bone conduction headphones and music playback to motivate continuous use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional equipment or user intervention is used to block sunlight during outdoor measurements, then measurement accuracy is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The system divides the measurement function across multiple sensors positioned at different locations on the body. Each sensor independently measures biological information, and the system segments the sunlight interference problem by having sensors at different orientations and positions, so at least one sensor remains unaffected by direct sunlight at any given time.
Solution Approach 2:
The system automatically selects the optimal sensor based on real-time output values without requiring user intervention or additional blocking equipment. The controller autonomously monitors all sensor outputs and switches between sensors based on which one provides the most reliable measurement, making the system self-adjusting to sunlight conditions.
2Adaptability or versatility
If multiple sensors are used to overcome sunlight interference, then outdoor availability is improved, but device complexity increases
Solution Approach 1:
Multiple sensors are integrated into a single measurement apparatus that serves the universal function of measuring biological information under various lighting conditions. The sensors share common control logic and processing circuitry, allowing the system to maintain a unified design while achieving adaptability across different outdoor environments.
Solution Approach 2:
The patent combines multiple optical sensors, light sources, and control functions into an integrated measurement apparatus. The controller merges data from multiple sensors and automatically selects the optimal measurement, combining the functions of multiple independent devices into a single unified system that reduces overall complexity.
3Reliability
If sensors are positioned on different body parts, then resistance to sunlight interference is improved, but ease of operation deteriorates due to placement requirements
Solution Approach 1:
The system automatically compensates for sensor placement variations by monitoring output values from all sensors and selecting the one with the most reliable signal. Users do not need to precisely position sensors on specific body parts, as the system self-adjusts by selecting whichever sensor provides the best measurement at any given time.
Solution Approach 2:
The system dynamically switches between different sensors based on real-time performance rather than relying on fixed sensor positions. The controller continuously evaluates output values from multiple sensors and adapts the measurement source according to current lighting conditions and sensor performance, making the system flexible rather than rigid in its operation.
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
Enhances outdoor availability by eliminating the need for additional equipment and user attention, providing stable and continuous measurement of biological information like oxygen saturation, while ensuring the apparatus remains practical and user-friendly.
Implementation Method 1
Each of the sensors outputs an output value to calculate the same type of biological information by an optical measurement
Data Source
AI summary
A measurement apparatus includes a plurality of sensors wearable on different parts of a human body and a controller configured to acquire an output value of each of the sensors. The sensor each outputs an output value to calculate the same type of biological information by optical measurement, the controller selects either the sensor on the basis of each output value of the sensors, and determines a measured value of the biological information on the basis of an output values of the sensors selected.