Based On 12-lead Digital Ecg Cable Ecg Data Acquisition System

Necessary medical equipments are required increasingly in rural hospitals and community medical institutions, with the development of healthcare in China, ECG is one of them, being a useful machine to detect heart disease. So, it was decided to design a low-cost, portable, 12-lead digital ECG Machine.This is to introduce a hardware design of a low cost, portable, 12-lead digital ECG. Data acquisition system, which can be used both in a normal portable ECG machine, or a PC with a software analyser.In the ECG machine design, an ARM920T 32-bit MCU was used as the control unit, low-power devices and power management technology were selected to make it possible to work long hours with embedded battery packs. Reduce the quantity of analogue devices to minimize the size. A digital ECG data acquisition lead was designed to reduce the noise impact. DSP technique was employed to increase the reliability and stability. Module structure design method was achieved to get a good maintainability.In the data acquisition part, a 24-bit 16-channel high speed AD converter being used, together with a simplified circuit design- eliminating the need of the 3.2s filter and the Wilson net hardware- a compact 12-lead ECG data acquisition system was achieved. It can use the USB power line, for a 5VDC power supply is designed in the ECG data acquisition system, and make it easy to adapt to PC analyser.