Optical Sensor Calibration for Antioxidant Estimation
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Solution Overview
Problem
Current methods for non-invasively estimating antioxidant levels in the body are not effective in providing accurate and user-friendly solutions for monitoring antioxidant levels, which are crucial for maintaining health and preventing tissue diseases caused by excessive reactive oxygen species.
Innovation Solution
An electronic device equipped with an optical sensor that emits reference and measurement lights, performs calibration using a reference object, and estimates bio-information by calculating absorbances at different wavelengths, guiding the user through various phases with haptic and sound signals to ensure accurate measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an optical sensor is used to non-invasively estimate antioxidant levels, then the measurement process becomes less invasive and more user-friendly, but the measurement precision and reliability are compromised due to interference from external light sources and variability in skin properties
Solution Approach 1:
The patent performs calibration measurements before actual bio-information measurements to establish reference values for the optical sensor. The calibration process captures skin properties and external light conditions in advance, allowing the system to compensate for these factors during subsequent measurements, thereby improving precision while maintaining ease of operation
Solution Approach 2:
The system uses the calibration data as feedback to adjust and correct measurements in real-time. By comparing actual measurements against calibrated reference values, the system compensates for variations in skin properties and external light interference, enhancing measurement accuracy without requiring complex user input
2Reliability
If calibration is performed using a reference object to improve measurement accuracy, then the reliability of bio-information estimation is enhanced, but the device complexity and measurement time increase
Solution Approach 1:
The optical sensor serves multiple functions: it performs both calibration measurements using a reference object and actual bio-information measurements on the user. This multi-functionality allows the system to maintain high reliability through calibration while avoiding the need for separate dedicated calibration devices, thereby limiting the increase in device complexity
3Measurement precision
If the optical sensor emits light at multiple wavelengths to improve antioxidant level estimation accuracy, then the measurement precision is enhanced, but the energy consumption and device complexity increase
Solution Approach 1:
The optical sensor emits light at multiple wavelengths in a periodic or sequential manner rather than simultaneously. The sensor switches between different wavelengths over time, which allows the system to maintain measurement precision by capturing spectral information at multiple wavelengths while reducing energy consumption compared to emitting all wavelengths continuously
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 device provides a reliable and user-friendly method for estimating antioxidant levels, enabling effective monitoring and recommendation for maintaining optimal antioxidant levels, thus helping to prevent related health issues.
Implementation Method 1
an optical sensor configured to emit a reference light to a reference object and detect the reference light reflected from the reference object during calibration, and emit a measurement light to a target object and detect the measurement light reflected from the target object during a measurement
Implementation Method 2
estimate bio-information based on a light quantity of the measurement light that is reflected from the target object by the optical sensor, and a light quantity of the reference light reflected from the reference object
Data Source
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AI summary
An electronic device may include an optical sensor configured to emit a reference light to a reference object and detect the reference light reflected from the reference object during calibration, and emit a measurement light to a target object and detect the measurement light reflected from the target object during a measurement; and a processor configured to perform the calibration of the optical sensor while the electronic device is disposed to oppose or in contact with the reference object by controlling the optical sensor to emit and detect the reference light, and estimate bio-information based on a light quantity of the measurement light that is reflected from the target object by the optical sensor, and a light quantity of the reference light reflected from the reference object.