Noninvasive blood glucose measurement apparatus and method using multiple sensors
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Solution Overview
Problem
Current noninvasive blood glucose measurement technologies face challenges in accurately measuring blood glucose levels without causing tissue damage, particularly in soft tissues like the earlobe, due to variations in tissue thickness and temperature, which affect signal consistency and accuracy.
Innovation Solution
A noninvasive blood glucose measurement apparatus using multiple sensors that combine light reflection and photoacoustic transmission characteristics, employing a balanced fastening structure to maintain consistent signal measurement components and include thickness measurement for personalized correction, allowing for accurate glucose level evaluation across varying tissue conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If noninvasive blood glucose measurement is performed using light signals in soft tissue, then tissue damage is avoided, but measurement accuracy deteriorates due to variations in tissue thickness and temperature
Solution Approach 1:
The patent employs multiple wavelengths of light (different physical parameters) to measure blood glucose. By using light signals at various wavelengths and analyzing their absorption and reflection characteristics in soft tissue, the system can differentiate glucose concentration effects from other tissue variations, thereby maintaining measurement accuracy without causing tissue damage
Solution Approach 2:
The patent introduces light signals as an intermediary to indirectly measure blood glucose levels. Instead of directly contacting or damaging tissue with electrodes or probes, the system uses light transmission and reflection through the tissue as a mediator to obtain glucose information, thus avoiding harmful physical intrusion while preserving measurement capability
2Measurement precision
If multiple sensors are used to measure light reflection and transmission characteristics, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent combines multiple sensing functions (light transmission detection, light reflection detection, and thickness measurement) into an integrated sensor system. By merging these measurement capabilities into a single coordinated apparatus, the system achieves comprehensive data collection for accurate glucose measurement while avoiding the need for separate independent devices, thus managing complexity through functional integration
Solution Approach 2:
The sensor system is designed with multi-functionality, where the same sensor array serves multiple purposes: measuring light transmission characteristics, light reflection characteristics, and tissue thickness. This universal design allows a single device to perform multiple measurement tasks, reducing overall system complexity compared to using separate specialized devices for each function
3Device complexity
If tissue thickness variations are not corrected, then measurement process remains simple, but measurement accuracy deteriorates
Solution Approach 1:
The patent incorporates thickness measurement as a feedback parameter to correct blood glucose measurements. By continuously monitoring tissue thickness and using this information to adjust or compensate the glucose concentration calculation, the system accounts for anatomical variations among individuals and over time, thereby maintaining high measurement accuracy without requiring complex invasive procedures
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 solution provides stable and accurate blood glucose measurements by maintaining constant signal component alignment and incorporating thickness correction, enhancing measurement reliability and convenience for continuous monitoring.
Implementation Method 1
a first light source unit disposed in a probe and configured to irradiate light of at least one wavelength to a biological tissue, a second light source unit disposed in the probe and configured to irradiate light of at least one wavelength, which is different from that of the light of the first light source unit, to the biological tissue
Implementation Method 2
a first receiving unit disposed in the probe and configured to receive a transmission signal generated as the light irradiated to the biological tissue passes through the biological tissue
Implementation Method 3
a second receiving unit configured to receive a light reflection signal generated as the light irradiated to the biological tissue is reflected by the biological tissue
Implementation Method 4
a measurement unit configured to measure light reflection characteristics of the biological tissue by using the light reflection signal received by the second receiving unit
Data Source
AI summary
Disclosed are a noninvasive blood glucose measurement apparatus and method using multiple sensors. The noninvasive blood glucose measurement apparatus includes: a first light source unit configured to irradiate light to the biological tissue, a second light source unit configured to irradiate light to the biological tissue, a first receiving unit configured to receive a photoacoustic and/or light transmission signal generated by the light, a second receiving unit configured to receive a light reflection signal reflected by the biological tissue, and a measurement unit configured to measure light reflection characteristics of the biological tissue by using the light reflection signal, measure photoacoustic and/or light transmission characteristics of the biological tissue, and measure blood glucose of the biological tissue on the basis of the light reflection characteristics and the photoacoustic and/or light transmission characteristics.