Design of ECG acquisition and display system based on ADS1292R and STM32 microcontroller

In allusion to the problems of the conventional electrocardiogram (ECG) acquisition system, such as large volume, high price and complexity, a portable ECG acquisition and display system based on ADS1292R chip and STM32F103 is designed in the paper. The system uses ASD1292R as analog front end, processes the signal through STM32 microcontroller, and displays heart rate and ECG on the TFT-LCD. Moving average filter and FIR band-pass filter algorithm are adopted in order to remove interference signal. At the same time, the ECG signal can be transmitted to the mobile APP by the serial port Bluetooth module, user can observe their own heart rate and ECG waveform in real time and understand their own physical condition clearly. Through the experiment test, the relative error of heart rate measurement is less than 3%. The research results show that the designed system can stably and effectively collect the ECG signal of human body, and realize the signal transmission and display. It has the characteristics of small size, low cost and low power consumption and is convenient for daily use.