Non-invasive Blood Glucose Sensor Adaptive Laser Energy Control
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Solution Overview
Problem
Existing non-invasive blood glucose measurement technologies face challenges with high power consumption and prolonged measurement times due to the use of high-output lasers and the need for multiple measurements to average noise and body movement effects.
Innovation Solution
A non-invasive body information measurement apparatus that adjusts the luminous energy level of the laser based on the user's body condition using a blood glucose level measured with an invasive device, optimizing power consumption and measurement time by selecting the appropriate energy level during calibration and normal measurement periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high-output laser is used to obtain a sufficient photoacoustic signal, then measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of laser output power based on detected body conditions. The controller modifies the luminous energy level of the laser in real-time according to the measured characteristic quantities, transitioning from static high-power operation to adaptive power levels that match actual measurement needs.
Solution Approach 2:
The system changes the physical parameter of laser output power dynamically. By adjusting the luminous energy level according to body condition parameters (such as tissue thickness, blood glucose concentration), the system optimizes the balance between signal quality and power consumption.
2Measurement precision
If multiple measurements are performed and averaged to minimize noise and body movement effects, then measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The patent dynamically adjusts the number of measurement repetitions based on detected body conditions and signal quality. When body conditions indicate stable measurements (low movement, good signal-to-noise ratio), the system reduces the number of repetitions. When conditions deteriorate, it increases repetitions accordingly, optimizing the trade-off between accuracy and time.
Solution Approach 2:
The system uses feedback from body condition measurements and signal quality assessment to control the measurement process. The controller continuously monitors characteristic quantities and adjusts measurement parameters (number of repetitions, laser power) based on this feedback, creating a closed-loop system that adapts to real-time conditions.
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 apparatus reduces power consumption and measurement time, enabling continuous, efficient monitoring of blood glucose levels by determining the optimal luminous energy level for accurate readings.
Implementation Method 1
a 'system for measuring a biological parameter by means of photoacoustic interaction' that makes use of a photoacoustic effect has been proposed
Implementation Method 2
the converged light is generally absorbed by glucose, and is converted into kinetic energy in tissue within the focal region and the adjacent region
Data Source
AI summary
A non-invasive body information measurement apparatus, in which a blood glucose level is corrected using a blood glucose level measured with an invasive blood glucose measurement apparatus, wherein in a calibration period, measurement of body information is performed at a plurality of luminous energy levels, a plurality of estimated blood glucose levels are calculated from a plurality of characteristic quantities calculated at the various luminous energy levels and from blood glucose levels measured with an invasive blood glucose measurement apparatus, and at the end of the calibration period, the blood glucose levels measured with the invasive blood glucose measurement apparatus are compared with a plurality of estimated blood glucose levels, and in a normal measurement period a light source is controlled so that measurement is performed at a luminous energy level corresponding to the estimated blood glucose level that satisfies the targeted accuracy.