ECG Measurement Station Feedback Loop for Synchronized ECG and IPG
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Solution Overview
Problem
Existing measurement devices face challenges in obtaining synchronized and high-quality electrocardiogram (ECG) and impedance plethysmogram (IPG) measurements, particularly when performed by the same device, due to increased noise levels when using multi-channel ECG with electrodes on the user's arm and legs.
Innovation Solution
A measurement station with an electrocardiogram acquisition system and an impedance measurement system, utilizing a feedback loop with operational amplifiers and separate control electrodes, allows for simultaneous and synchronized ECG and IPG measurements by isolating the electrical connection circuit from the ECG electronic circuit, and incorporating a switch for activating or deactivating the current source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-channel ECG with electrodes on user's arm and legs is performed simultaneously with IPG, then comprehensive biometric monitoring is achieved, but noise levels increase and measurement quality deteriorates
Solution Approach 1:
The patent divides the measurement functions into separate circuits: an ECG electronic circuit for electrocardiogram acquisition and an electrical connection circuit for IPG measurement. This segmentation allows each circuit to operate independently with optimized parameters, preventing noise from one measurement type from degrading the other, thus maintaining high measurement quality while enabling comprehensive monitoring
Solution Approach 2:
The patent extracts the IPG measurement function from the ECG circuit by creating a separate electrical connection circuit. This extraction removes the source of interference from the sensitive ECG measurement path, allowing simultaneous operation of both measurement systems without mutual degradation of signal quality
2Measurement precision
If ECG and IPG are acquired by two different systems, then measurement quality is maintained, but synchronization becomes difficult
Solution Approach 1:
The patent merges the ECG electronic circuit and the electrical connection circuit into a single integrated measurement station device. This combination maintains the independence of each measurement circuit for quality assurance while providing a unified control and processing architecture that simplifies synchronization through shared timing signals and coordinated operation
3Measurement precision
If feedback loop with operational amplifiers is used, then ECG signal quality is improved, but circuit complexity increases
Solution Approach 1:
The patent implements a feedback loop using operational amplifiers in the ECG electronic circuit to amplify and condition the微弱 ECG signals from the electrodes. The feedback mechanism stabilizes the signal amplification process, reduces noise, and improves overall signal quality while the modular circuit design keeps the complexity manageable
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 high-quality, synchronized acquisition of ECG and IPG measurements with reduced noise interference, facilitating comprehensive biometric signal monitoring.
Implementation Method 1
an electrical connection circuit, the electrical connection circuit comprising a feedback loop connected to the two control electrodes
Implementation Method 2
one of the two control electrodes is configured to measure a potential of the user's body, the feedback loop is configured to amplify and invert the measured potential
Data Source
AI summary
A measurement station includes an electrocardiogram acquisition system, two control electrodes configured to contact a user, and an electrical connection circuit, the electrical connection circuit comprising a feedback loop connected to the two control electrodes.