Method for representing cardiophonogram in intelligent cardiophone of mobile phone

Abstract

The invention relates to a method for representing the cardiophonogram in an intelligent cardiophone of a mobile phone, comprising the following steps: measuring cardiac sound signals by using a piezoelectric vibrating cardiac sound sensor, amplifying and filtering the cardiac sound signals by using a voltage preamplifier, transmitting the cardiac sound signals to the mobile phone by using a microphone input end for a USB interface of the mobile phone, storing the cardiac sound signals by using the recording function of the mobile phone, displaying a period-power-frequency graph for the cardiac sound signals in one period on the display screen of the mobile phone, drawing a 540Hz frequency coordinate for the cardiac sound signals in one period by using the improved polar coordinate drawing method, calculating the characteristic of the power spectrum for the cardiac sound signals in one period, normalizing the energy of the cardiac sound signals, compressing the indexes, drawing a change rule for the power and frequency of the cardiac sound signals in one period on an improved polar coordinate diagram, and signifying a peak point with an arrow to obtain a new period-power-frequencygraph for the cardiac sound signals, which can vividly represent the change rule of the power and the frequency of the cardiac sound signals in one period and can effectively disclose the individual physiological characteristic of each cardiac sound signal.

Description

technical field [0001] The invention proposes a phonocardiogram representation method attached to a mobile phone for visually describing human heart sound signals. Background technique [0002] Heart sound detection and analysis is an important and economical means to understand the state of the heart and blood vessels, because the heart sound signal is a physiological signal that accompanies life. From 1843, George P.Cammann invented the binaural (two-channel) stethoscope (binaural stethoscope), to the design of Dr.Littmann of Harvard Medical School in the 1960s, with a dual-purpose chest piece (bell and membrane) Type) portable stethoscope, the traditional stethoscope has a history of more than 100 years, and has a high practical value for the diagnosis of patients' diseases. Today's advanced electronic stethoscope can amplify the sound by 18 times and can be connected to a PC for software analysis. For example, the Littmann stethoscope of the most famous 3M company, and...

AI Technical Summary

Problems solved by technology

However, as a medical self-care tool, there is still no product. Therefore, the invention of the smart heart sound diagnostic device for mobile phones has positive practical significance for developing new functions of mobile phones and promoting the development of a new generation of smart phones.

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