Two Implements Of The Pacing ECG Acquisition System

For a pacing ECG acquisition system,the requirements of sampling frequency and resolution are usually very high.While posing a challenge for the performance of the AD convertor,high sampling frequency and resolution also bring up the issue of mass data.The transmission speed of the data,the storage volume and the algorithm speed are all challenged.Lots of researches are conducted on ECG pacemaker pulse detection.But most of these researches are about algorithms based on existing data,leaving the data acquisition system aside.In fact,a reliable pacing ECG acquisition system is the guarantee of these algorithms.In this paper,we proposed two implements of the pacing ECG acquisition system.The second chapter designed a prototype of pacing ECG acquisition system based on the EVM of TMS320C6678,which is a digital signal processor of high performance from TI.By taking advantage of 2 pieces of ADS 1298,we can sample 2 sets of signal in the same time,one set from the front-end analog circuit output,and the other from the original ECG input.The pacemaker pulse can be well detected,even under the test case where the pulse width is only 0.1ms,and the acquisition performance of ECG is also good.In the third chapter,several issues about the application of C6678 in the pacing ECG acquisition system are elaborated.We designed an auxiliary control system for C6678.High-speed digital circuit is implemented.By the comprehension of the bootloader inside C6678,the SPI boot was realized.In the fourth chapter,we proposed a pacing ECG acquisition system with a standalone pacing channel.Based on this particular channel,we achieved the enhancement and shaping of the pacemaker pulse.Using this reshaped pulse as an interrupt source for a MCU,we marked out the position of pacemaker pulses in the pacing ECG successfully,even when the pulse width is only 0.1 ms.The fifth chapter is a summary of this paper.Prospects for future work are also proposed.