Multi-Wavelength Optical Sensor for Non-Invasive Bio-Information Estimation
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Solution Overview
Problem
There is a need for a non-invasive method to effectively estimate antioxidant levels in the body, as excessive reactive oxygen species can lead to various tissue diseases, and current methods lack efficiency in identifying antioxidant levels in real-time.
Innovation Solution
An apparatus and method utilizing an optical sensor with a multi-wavelength light source and detectors to emit and detect light scattered or reflected from the skin, processing the spectra to determine valid bio-information values, including antioxidant levels, through HQI, hemoglobin index, and contact position verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple verification methods (HQI, hemoglobin index, contact position) are applied to determine valid spectra, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The verification process is divided into three independent modules: HQI verification, hemoglobin index verification, and contact position verification. Each module independently validates spectra from different aspects, allowing the system to determine spectra validity through multiple independent checks rather than a single complex verification process.
Solution Approach 2:
The optical sensor system performs multiple functions: it measures antioxidant levels through HQI verification, monitors hemoglobin levels through hemoglobin index verification, and ensures proper contact through contact position verification. This multi-functional approach enables comprehensive spectra validation using a single integrated device.
2Measurement precision
If an array of multiple light sources emitting different wavelengths is used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The light source is divided into multiple independent LED elements, each emitting at a specific wavelength. This segmentation allows the system to target different absorption peaks of antioxidants and other biomolecules independently, improving spectral measurement precision without requiring a single complex broadband source.
Solution Approach 2:
The system changes the wavelength parameter by using multiple LEDs with different emission wavelengths (e.g., 405nm, 450nm, 480nm, 530nm, 560nm, 630nm, 660nm, 850nm). This enables the system to capture spectral information at multiple critical wavelengths simultaneously, improving measurement precision while maintaining a relatively simple device structure.
3Measurement precision
If multiple detectors are arranged around the light source in a pixel array, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The detectors are arranged in a two-dimensional pixel array surrounding the central light source, transitioning from a single-point detection to a spatially distributed detection system. This dimensional arrangement allows the system to capture light scattering and reflection information from multiple angles and positions simultaneously, improving measurement precision.
Solution Approach 2:
The pixel array of detectors serves multiple functions: detecting transmitted light, scattered light, and reflected light from the object. This universal detection capability allows a single detector array to replace multiple specialized detectors, improving measurement precision while maintaining manageable device complexity.
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
Enables non-invasive, efficient estimation of antioxidant levels, along with other bio-parameters like blood glucose and cholesterol, providing real-time data for health monitoring and recommendations.
Implementation Method 1
a plurality of detectors configured to detect light of each wavelength which is scattered or reflected from the object
Implementation Method 2
a plurality of detectors configured to detect light of each wavelength which is scattered or reflected from the object
Implementation Method 3
The optical sensor includes a pixel array having a circular shape or a polygonal shape, the light source is disposed on a central pixel of the pixel array, and each of the plurality of detectors is disposed on a respective pixel around the central pixel
Data Source
AI summary
An apparatus for estimating bio-information includes an optical sensor including a light source configured to emit light of multiple wavelengths onto an object, and including a plurality of detectors configured to detect light of each wavelength which is scattered or reflected from the object. The apparatus includes a processor configured to obtain spectra based on light of each wavelength which is detected by each detector, determine valid spectra of the obtained spectra, and estimate a bio-information value based on the valid spectra.