生物阻抗测量系统的改良

目的:针对目前现有的生物阻抗测量系统测量速度和精度不够的问题,提出相应的改进方法。方法:在信号发生部分采用AD公司的ADuC847微处理器作为核心微处理器;在信号采集部分采用Atmel公司的AT91RM9200微控制器芯片和TI公司的ADS1256芯片作为核心芯片。结果:生物阻抗测量系统的信号发生精度提高到12位,信号采集精度提高到24位,速度提高到30,000SPS。结论:对信号发生和信号采集方面速度和精度的提高,有效地提高了整个测量系统的速度和精确度。

The Improvement of Medical Bioelectrical Impedance Measurement System

Objective:In this paper,in order to remedy the disadvantages of the Medical Bioelectrical Impedance Measurement Systems,such as low speed and lack of precision,an improved measurement system was presented.Methods:We chose AduC847 chip which was produced by AD company as core chip in the signal supply part;we also chose AT91RM9200 chip which was produced by Atmel company and ADS1256 chip which was produced by TI company as core chips in the signal collection part.Results:The precision of signal supply part was improved to 12 bits.The precision of signal collection part was improved to 24 bits and its collection speed was improved to 30000 Samples per Second.Conclusions:The improved precision and speed of the signal supply part and signal collection part improved the whole speed and precision of Medical Bioelectrical Impedance Measurement System effectively.