System and method for suppressing peaks in a seismogram

Abstract

The present invention provides a seismogram system comprising: an accelerometer adapted to obtain accelerometer data from a user; and a bandpass filter adapted to filter the accelerometer data . The system further includes an envelope filter adapted to suppress the S2 peak in the bandpass filtered accelerometer data, wherein the envelope filter includes: a low pass filter; and a comb filter, wherein , the delay of the comb filter is tuned based on left ventricular ejection time (LVET).

Description

technical field [0001] The present invention relates to the field of signal processing, and more particularly to the field of peak suppression in seismograms. Background technique [0002] Respiratory and cardiac signals and their corresponding rates are basic vital signs used to monitor the patient's condition. In particular, heart rate is one of the most important vital signs for patient monitors in wards. Typically, vital signals are generated by sensor electrodes attached to the patient. However, since the patient typically needs to be in the ward for extended periods of time, the attachment of the electrodes and cables can become intrusive and uncomfortable during prolonged use of the electrodes and cables. [0003] In response, unobtrusive measurement techniques for monitoring a patient's respiratory and cardiac signals have become increasingly popular. For example, a battery powered triaxial accelerometer can be attached to the patient's body. In this case, the ac...

AI Technical Summary

Problems solved by technology

However, the attachment of electrodes and cables can become intrusive and uncomfortable during prolonged use of the electrodes and cables as patients are often required to be in the patient room for extended periods of time

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