R-Wave Detection Suspension for False Signal Reduction
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Solution Overview
Problem
Existing R-wave detection systems face challenges in accurately identifying R-waves from electrocardiographic waveforms, particularly when noise levels are high or the contact between electrodes and the body changes, leading to false detections.
Innovation Solution
A cardiac potential detection device with a controller unit that uses a plurality of electrodes to detect input voltage and suspends R-wave identification during abnormal potential generation periods and transient periods, reducing false detection by adapting the R-wave detection threshold based on the peak value of the voltage waveform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If R-wave detection is performed continuously using conventional threshold methods, then detection sensitivity is maintained, but false detection increases during abnormal potential generation periods
Solution Approach 1:
The control unit preliminarily identifies abnormal potential generation periods by monitoring when the voltage waveform exceeds a predetermined threshold, and proactively suspends R-wave detection during these periods before false detections can occur. This preliminary action prevents the harmful effect of false detection rather than correcting it after occurrence.
Solution Approach 2:
The invention extracts and isolates the abnormal potential generation periods from the continuous detection process by suspending R-wave detection specifically during these periods. This separation allows the detection system to operate normally during safe periods while avoiding false detections during abnormal periods.
2Measurement precision
If detection sensitivity is increased to detect weak R-waves, then detection coverage improves, but susceptibility to noise interference increases
Solution Approach 1:
The system preliminarily identifies noise-prone periods by detecting when the voltage waveform exceeds the threshold, indicating abnormal potential generation. By suspending detection during these preliminarily identified periods, the system protects against noise interference before it can cause false detections, while maintaining high sensitivity during normal periods.
Data Source
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AI summary
A cardiac potential detection device for detecting R-waves from an electrocardiographic waveform includes a plurality of electrodes, a detector, and a control unit. The detector detects an input voltage applied from the electrodes. The control unit identifies an R-wave based on the input voltage detected by the detector, but suspends identifying R-waves in a detection-suspension period including a period in which the input voltage exceeds a predetermined threshold.