基于ADS1294的表面肌电信号采集系统的设计

Design of ADS1294 SEMG acquisition system

目的:设计并实现一种表面肌电信号采集系统。方法:由基于ADS1294数模转换芯片的前端信号采集模块、基于LPC2368的微处理器模块以及运行在Windows环境下的上位机控制程序构成整套系统。由上位机程序发出控制命令,经串口传输到微处理器,从而实现对前端采集模块的控制,将采集到的信号经过微处理器模块最终传输到个人计算机上进行显示与保存。结果:系统能够实时从人体采集多路表面肌电信号,在上位机程序中动态显示,并将信号转换成24位μV级数据存储在个人计算机上。结论:经过大量临床试验表明,系统具有体积小、功耗低、精度高以及操作直观等优点,可以获得多路清晰的表面肌电信号,可以应用于肌肉临床诊断、康复医学及运动医学等领域。

Objective To design and implement one kind of SEMG signal acquisition system. Methods The system consisted of three parts, namely, signal acquisition module based on digital-analog conversion chip ADS1294, LPC2368 microprocessor module and PC application program under Windows. The control commands were sent from PC application program first, and transmitted to the microprocessor to control the signal acquisition module, and then the acquired signals were displayed and stored on PC. Results The system could acquire multiplex real-time SEMGs, display in the PC program dynamically, and convert signals into 24 μV level data and store them on PC. Conclusion The system is proved to have low volume, low power to consumption, high precision and easy operation, which can obtain multiplex SEMGs and thus can be used for diagnosis of muscle disease, rehabilitation medicine and sport medicine.