Glucose Biosignal Correction for Accurate Biometric Data

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Solution Overview

Problem

Existing continuous glucose monitoring systems (CGMS) suffer from noise interference in glucose-related biosignals due to the body recognizing the inserted sensor as a foreign substance and movement, leading to inaccurate biometric data output, with conventional compensation methods being inconvenient and inefficient.

Innovation Solution

A method for deriving biometric data that involves generating a corrected biosignal by applying weights to the corresponding time point biosignal and an ideal signal, using a high pass filter to process noise in real time, and determining the input data based on preset conditions, eliminating the need for external reference values.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a preset offset value is uniformly reflected to compensate for the negative intercept phenomenon, then the baseline compensation is simplified, but the compensation accuracy deteriorates due to excessive or insufficient compensation

Engineering Contradiction:

Improvecompensation process complexityVSAvoidbaseline compensation accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent applies dynamics by transitioning from a static, fixed offset value to a dynamic compensation method that adapts to changing baseline conditions. The system continuously adjusts the offset value based on real-time analysis of the biosignal's negative intercept phenomenon, allowing the compensation to evolve alongside the sensor's degradation pattern rather than relying on a predetermined fixed value.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback by establishing a closed-loop system where the actual biosignal data is continuously monitored and fed back into the compensation calculation. The system analyzes the real-time biosignal characteristics, compares them against the expected pattern, and adjusts the offset value accordingly, creating an adaptive compensation mechanism that responds to actual sensor performance rather than relying on预设 values.

Inventive Principle:

Principle #23Feedback

2Device complexity

If a fixed offset value is used for baseline compensation, then the compensation method is simple, but the ease of operation deteriorates due to the need for continuous external input

Engineering Contradiction:

Improvecompensation method complexityVSAvoidcompensation operation convenience

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The patent applies self-service by enabling the system to automatically perform baseline compensation without requiring continuous external intervention. The system autonomously analyzes its own biosignal output, detects the negative intercept phenomenon, and adjusts the offset value independently, freeing the user from manual compensation operations while maintaining accurate baseline reference.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements preliminary action by pre-configuring the system with the capability to automatically detect and compensate for baseline drift. The compensation algorithm is prepared in advance and activates automatically when the negative intercept phenomenon is detected, eliminating the need for users to manually input offset values during operation.

Inventive Principle:

Principle #10Preliminary action

3Ease of manufacture

If noise is introduced into the glucose-related biosignals due to sensor insertion and movement, then the sensor can be attached to the body, but the measurement precision deteriorates due to inaccurate biometric data

Engineering Contradiction:

Improvesensor attachment feasibilityVSAvoidbiometric data accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent applies the blessing in disguise principle by converting the harmful noise introduced by sensor insertion and movement into a detectable pattern that can be used for compensation. The system analyzes the noise characteristics and uses them to identify and correct the negative intercept phenomenon, transforming what was previously a source of error into a useful diagnostic signal for improving measurement accuracy.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces an intermediary compensation mechanism that acts as a mediator between the noisy biosignal and the final biometric data output. This intermediary layer processes the raw signal through noise filtering and baseline adjustment algorithms, separating the useful glucose information from the harmful noise introduced by sensor insertion and body movement.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250268492A1Method of deriving biometric data of analyte monitoring system

Publication Date: 2025.08.28 I SENS INC

AI summary

According to an embodiment, there may be provided a method of deriving biometric data of a specific time point displayed on a terminal of an analyte monitoring system including acquiring a corresponding time point biosignal, which is a biosignal of a time point corresponding to the specific time point, generating a corrected biosignal from the corresponding time point biosignal when the corresponding time point biosignal satisfies a preset condition, determining any one of the corresponding time point biosignal and the corrected biosignal as input data, and deriving biometric data of the specific time point using the input data.