Heart rate detection method based on smart phone

Abstract

The invention discloses a heart rate detection method based on a smart phone. The heart rate detection method is used for solving the technical problem that an existing heart rate detection method is poor in precision. According to the technical scheme, the heart rate detection method comprises the steps that a video recording human body skin color changes under irradiation of a stable light source is input to the smart phone, and human body volume pulse waves are calculated and captured by the smart phone; when main wave peaks are sought, an amplitude value of a current detection point is compared with an average amplitude value of multiple previous point near the current detection point, the volume pulse waves are located in a descending branch if the amplitude value of the detection point is small, the volume pulse waves are located in an ascending branch if the amplitude value of the detection point is large, alternation from the ascending branch to the descending branch serves as one main wave peak, and the heart rate is calculated by combining the interval time of the main wave peaks. According to the method, detection is always conducted along volume pulse wave signals, and therefore missing detection of the main wave peaks is avoided; the amplitude value of the current detection point is always compared with the average amplitude value of multiple previous points near the current detection point, therefore, double pulse peaks cannot change the descending state of the pulse waves, and false detection of the main wave peaks is avoided. Accordingly, the hear rate detection precision is improved.

Description

technical field [0001] The invention relates to a heart rate detection method, in particular to a smart phone-based heart rate detection method. Background technique [0002] The document "Research on heart rate detection technology based on photoplethysmography [D]. Supervisor: Zhou Yunyao. Wuhan University of Technology, 2014." discloses a method that uses LED lights and light sensors to collect fingertip volumetric pulse waves and detects heart rate. method. In order to avoid the influence of the dicrotic wave peak in the volumetric pulse wave on the main wave peak count, the method skips the dicrotic point by means of the quadratic curve, so as to reduce the error of heart rate calculation. In order not to mistake the dicrotic point as the peak of the main wave, this method designs a self-fitting quadratic curve to detect the main wave peak across the dicrotic point: after judging the previous main wave peak and the following valley point Finally, randomly fit a quadra...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of poor accuracy of existing heart rate detection methods, the present invention provides a smart phone-based heart rate detection method

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