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The calculation is not complicated, which makes this method effective for distinguishing S1 and S2 in real time.As a novel technology, wearable physiological parameter monitoring technology represents the future of monitoring technology. However, there are still many problems in the application of this kind of technology. In this paper, a pilot study was conducted to evaluate the quality of electrocardiogram (ECG) signals of the wearable physiological monitoring system (SensEcho-5. Firstly, an evaluation algorithm of ECG signal quality