Bio-information Estimation Apparatus Temperature Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current non-invasive methods for estimating bio-information, such as blood glucose levels, are cumbersome and prone to errors due to temperature-induced changes in absorption spectra, which affect the accuracy of measurements.
Innovation Solution
A bio-information estimation apparatus and method that includes a spectrum measurer, a temperature measurer, and a processor to calculate a correction factor, adjusting the gain, constant, and slope of the measured spectrum based on temperature changes, using a correlation between spectra at reference and varying temperatures to improve measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If non-invasive spectrum measurement is used to estimate bio-information, then the measurement process becomes less harmful and faster, but measurement precision deteriorates due to temperature-induced spectral changes
Solution Approach 1:
The patent applies parameter changes by detecting temperature variations and using these temperature parameters to select appropriate reference spectra from pre-stored temperature-specific reference spectra. This allows the system to adapt to temperature changes and maintain measurement accuracy without requiring invasive procedures
Solution Approach 2:
The patent creates temperature-specific reference spectra copies that represent the spectral characteristics at different temperatures. By storing multiple reference spectra corresponding to different temperature conditions, the system can select the most appropriate reference for comparison, thereby maintaining precision in non-invasive measurements across varying temperature conditions
2Measurement precision
If temperature correction is applied to compensate for spectral changes, then measurement accuracy improves, but device complexity increases due to additional temperature measurement and correction mechanisms
Solution Approach 1:
The patent implements preliminary action by pre-storing multiple reference spectra corresponding to different temperature conditions before actual measurements are taken. When a measurement is performed, the system simply needs to detect the current temperature and select the appropriate pre-prepared reference spectrum, avoiding the need for complex real-time spectral correction algorithms
Solution Approach 2:
The patent introduces temperature as an intermediary parameter that mediates between the physical spectral changes and the measurement analysis. By using temperature as the intermediate variable to select reference spectra, the system simplifies the correction process compared to directly modeling and correcting all spectral variations
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
This approach enables faster, less harmful, and more accurate estimation of bio-information like blood glucose, cholesterol, triglyceride, protein, and uric acid levels by compensating for temperature-induced spectral changes, thereby enhancing the reliability of non-invasive bio-measurements.
Implementation Method 1
a spectrum measurer configured to measure a spectrum of light reflected from an object
Implementation Method 2
a temperature measurer configured to measure the temperature of the object
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided is an apparatus for estimating bio-information in a non-invasive manner. According to an exemplary embodiment, the bio-information estimation apparatus includes: a spectrum measurer configured to measure a spectrum of light reflected from an object; a temperature measurer configured to measure the temperature of the object while the spectrum measurer measures the spectrum of light reflected from the object; and a processor configured to calculate a spectrum correction factor, including one or more of a correction factor of a gain, a constant, and a slope, based on the measured temperature of the object, and to adjust the measured spectrum by using the calculated correction factor.