MEASUREMENT SYSTEM OF RESPIRATION-RELATED SIGNALS AND METHOD OF OPERATING THE SAME

摘要

A measurement system of respiration-related signals includes a plurality of electrodes, an ECG processing device, and an analysis device. The ECG processing device acquires a first analog differential signal and a second analog differential signal through the electrodes and generates a Lead-I ECG signal and a Lead-II ECG signal which is orthogonal to the Lead-I ECG signal after processing the two analog differential signals. The analysis device executes a trigonometric function to calculate angle change values of a cardiac axis based on the acquired Lead-I ECG signal and the Lead-II ECG signal, and further generate a cardiac axis angle change waveform according to the continuous angle change values. Accordingly, the cardiac axis angle change waveform is suitable for the prediction of respiratory conditions of the participant because of the high positive correlation between the frequency of the cardiac axis angle change waveform and the human respiratory frequency.

主权项

1. A measurement system of respiration-related signals, comprising:
a plurality of electrodes configured to measure a first analog differential signal and a second analog differential signal of a participant; an ECG processing device connected to the electrodes and configured to generate a Lead-I digital signal and a Lead-II digital signal according to the first analog differential signal and the second analog differential signal; an included angle being between the Lead-I digital signal and the Lead-II digital signal, and the included angle being greater than or equal to 75° and less than or equal to 105°; an analysis device connected to the ECG processing device and configured to execute a function conversion according to the Lead-I digital signal and the Lead-II digital signal, and calculate a plurality of angle change values of a cardiac axis; and a display device connected to the analysis device to generate an angle change waveform of a respiration-related signal according to the angle change values.