Heart sound signal acquisition, conditioning and transmitting device

Abstract

The invention discloses a heart sound signal acquisition, conditioning and transmitting device. A heart sound sensor converts continuously variable heart sound signals of a human body into heart sound electrical signals; the heart sound electrical signals are subjected to controllable gain differential amplification and then transmitted to a filter part; a filter carries out reasonable low pass filtration, power frequency wave trapping and the like according to the frequency characteristics of the heart sound signals to reduce noise interference; the filtered bipolar heart sound analog signals are subjected to level lifting and analog-digital conversion; and a serial port transmission module is connected with an upper computer and used for receiving commands of the upper computer and transmitting the acquired heart sound digital signals. The device can be used for conveniently, quickly and accurately acquiring and conditioning the hearth sound signals, two power supply schemes by mains supply and batteries can be adopted, and the device is applied to multiple heart sound acquisition occasions such as hospitals, households and accident sites.

Description

technical field [0001] The invention relates to a heart sound signal collection, conditioning and transmission device, which belongs to the technical field of heart sound signal collection and processing. Background technique [0002] In recent years, the number of people who died of diseases of the circulatory system has risen to the first place. The heart is the engine of the human body, and almost all diseases of the circulatory system can be reflected from the heart. At present, domestic and foreign are more enthusiastic about using heart sound signals to diagnose cardiovascular diseases, because it is convenient, economical and accurate to use heart sounds to diagnose cardiovascular diseases. The heart sound signal contains rich information that can reflect the normal or pathological conditions of the heart, and has great advantages in the field of detecting this type of disease. More and more engineers and researchers are investing in the field of heart sound signal ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are some similar heart sound signal acquisition devices on the market, but because the heart sound signal is weak and the frequency is low, it is easy to be interfered by the circuit and the surrounding environment, so it is difficult to guarantee the quality of the collected heart sound signal in a complex application environment such as an accident scene

Moreover, the strength of the heart sound signal will vary depending on the person's constitution and disease type. Too much or too little pressure when the heart sound sensor contacts the human body will cause the heart sound signal amplitude to fluctuate greatly.

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