Research And Design Of Bluetooth Finger ECG System For Wearable Health

In recent years,more and more people suffer from heart disease,which has become a major factor threatening human health.Heart disease is characterized by sudden,episodic onset without warning,resulting in the death of many people.Electrocardiogram(ECG)is currently the most widely used clinically,the reference value of physiological signals,contains abundant heart health information,through ECG provide valuable information about heart health to assess the electrical activity,to detect any abnormal function of cardiovascular disease or heart,is the important basis for the diagnosis of cardiovascular disease.Traditional measuring method of ECG was measured by professional ECG machine,which requires lead wire connection and special electrode with electrolyte gel,and the measurement process is complicated and uncomfortable.In addition,the ECG machine volume is heavy,expensive,often used in hospitals,which is not suitable for home use and personalized measurement.A Finger Bluetooth ECG system for wearable healthy using metal-plate electrodes is studied and implemented in this paper in order to solve the above pain points.The design of the whole system focuses on high quality signal,system miniaturization and low power consumption.The system is mainly composed of hardware scheme,embedded software and mobile APP,which can realize the real-time acquisition,real-time processing,wireless transmission,real-time display and other functions of finger ECG signal.In the system hardware circuit design,the core components are selected according to the system requirements.The ECG signal acquisition circuit based on KS1081 analog front-end chip and Bluetooth communication circuit based on n RF52832 Bluetooth low power chip are designed.The power management circuit is designed according to the actual requirements to provide 2V working voltage for the system.Apart from this,a switch electromechanical circuit is integrated to realize the system power on and power off.In the design of embedded software,the wavelet threshold denoising algorithm and mathematical morphological filtering algorithm are optimized,which can be transplanted to n RF52832 chip for real-time processing of ECG signal.In addition,ECG acquisition module and Bluetooth communication module are designed to realize ECG data acquisition and Bluetooth data transmission.The mobile phone APP realizes the real-time display and storage of ECG signals,and the heart rate value is obtained by analyzing the data through the designed adaptive differential threshold algorithm.Finally,the performance parameters of the system were integrated and tested.Experimental results show that the system can obtain the high-precision ECG signal including P-Q-R-S-T waveform from the finger end through the metal dry electrode,which is lightweight and portable and has the characteristics of long running time.Meet the system expectations for high quality signal,system miniaturization and low power consumption.The preliminary results show that the proposed Bluetooth finger ECG system is suitable for wearable heart health monitoring and application scenarios.