Design And Implementation Of Wireless Multiparameter Electrophysiological Signal Acquisition System

In recent years, with the rapid development of electronic science and technology, the accuracy of multiple physiological parameters signal acquisition system is gradually improved, along with the significant decrease in size and power consuming, making it possible to create a portable/wearable device. One of the biggest challenge in bioelectrical signal detection technology is to capture the ?V-level physiological signal, it requires high system gain and resolution, as well as efficient noise cancellation.This paper presents a new design of wireless multiple physiological parameters signal acquisition system which can sends biological signals measured from subject wirelessly to host PC for acquisition and display. The subjects can move freely in certain range area during the test. The system is consist of hardware module and acquisition software module. The hardware module recruit ADS1299 analog front end and GS2200M Micro Controller Unit with Wi-Fi to replace the traditional physiological signal amplifier design with multi-stage analog amplifier and filter circuit, this new design is simple in structure and make it easy for debugging. For the software module, we used NI's programmable software LabVIEW designs for signal processing including digital filtering, FFT analysis, impedance measurement and visualizing. It also can playback recorded signal waveform.The system can capture very weak bioelectrical signals and it's algorithms is capable with basic biological signal analysis. The system provide a new solution for wearable medical device.