Wireless biopotential signals acquisition system

2013 Fourth Argentine Symposium and Conference on Embedded Systems (SASE/CASE) Pub Date : 2013-10-21 DOI:10.1109/SASE-CASE.2013.6636771

E. Cilleruelo, Andres Nacelle, G. Robert, J. Oreggioni, F. Silveira, A. Caputi

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Abstract

In this paper, we present a low power wireless system based on a MSP430 based system-on-chip for biopotential signals acquisition. The system is capable of recording up to 12 ksps from up to 4 channels with independent gain and a 1 Hz to 5 kHz bandwidth. The gain for each channel may vary from 2.5 kV/V to 68 kV/V, being able to adapt signals in a range of 20 μV to 1 mV, to be digitalized in a 12 bits ADC. The system consists of 2 modules, which communicate wirelessly with each other via a 915 MHz link, with Minimum-shift keying (MSK) modulation. The communication reaches 358 kbps of transmission rate, with less than 2% of packets lost without retransmissions, within a 5 meters range. One of the modules is wired to a PC via a USB cable, reaching 921.6 kbps of transmission rate through UART protocol. The wired module is powered through the USB port, whereas the wireless module is powered with 2 AAA batteries, lasting for more than 24 hours of operation. A Matlab toolbox was developed in order to facilitate the data storage, system configuration as well as collected data analysis.

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无线生物电位信号采集系统

本文提出了一种基于MSP430单片机的低功耗无线生物电位信号采集系统。该系统能够从多达4个通道记录高达12 ksps的独立增益和1 Hz至5 kHz的带宽。每个通道的增益可以从2.5 kV/V到68 kV/V，能够适应20 μV到1 mV范围内的信号，在12位ADC中进行数字化。该系统由2个模块组成，通过915 MHz链路进行无线通信，采用最小移位键控(MSK)调制。在5米范围内，传输速率达到358kbps，无重传丢包率低于2%。其中一个模块通过USB电缆连接到PC上，通过UART协议达到921.6 kbps的传输速率。有线模块通过USB接口供电，无线模块使用2节AAA电池供电，使用时间超过24小时。为了便于数据存储、系统配置以及收集到的数据分析，开发了Matlab工具箱。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2013 Fourth Argentine Symposium and Conference on Embedded Systems (SASE/CASE)

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