Method and system for measuring heart rate based on piezoelectric signal

Abstract

The invention discloses a heart rate measuring method and system based on piezoelectric signals. The method comprises the steps that a heart beat template is screened from heart beat characteristics of heart rate signals of a user to be measured; a heart rate candidate value set is worked out through a extreme value set of a self-correlation function of heart rate signals within a preset time frame; composite signals are generated through the heart beat template and all heart rate candidate values, and the cross-correlation function of the heart rate signals within the preset time frame and all the composite signals is determined; the reliability of each heart rate candidate value is calculated through the composite signal of each heart rate candidate value and the cross-correlation function, and the heart rate candidate value with the highest reliability is determined as a heart rate measuring result. Due to the fact that the composite signals are composited through the heart beat template extracted and screened from the heart rate signals in a self-adaptive mode and the heart rate candidate values, the heart beat waveform variation influence under different measuring environments can be effectively eliminated, and thus the accuracy of the heart rate measuring result is ensured.

Description

technical field [0001] The invention relates to the technical field of biomedical signal processing, in particular to a heart rate measurement method and system based on piezoelectric signals. Background technique [0002] Today, with the rapid development of science and technology and the continuous improvement of the national economic level, people pay more and more attention to physical fitness and quality of life. Significantly, more and more people want to realize sleep quality monitoring based on heart rate monitoring in their own homes. Among them, the heart rate refers to the number of heartbeats per minute. [0003] At present, the common heart rate measurement method is based on the clustering method, which detects the extreme point of the piezoelectric signal, takes the position of the extreme point as the heartbeat candidate point, and down-samples the signal near the heartbeat candidate point as the feature vector , through the fully connected hierarchical clu...

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Problems solved by technology

[0005] In view of this, the present invention provides a heart rate measurement method and system based on piezoelectric signals to overcome the disadvantages in the prior art that irregular heartbeat features may be clustered into non-heartbeat categories, resulting in a low heartbeat detection rate, This in turn improves the accuracy of heart rate measurements

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