基于双通道光纤传感器的生理数据采集系统研究

Research on physiological data acquisition system based on dual channel fiber optic sensor

为了满足微弯曲光纤传感器在血压检测上的应用,在原有传感器基础上增加了一路传感器,并通过可编程逻辑器件对原始数据进行预处理。系统由两路微弯曲光纤传感器、两路前置模拟放大部分、两路ADC、微处理器、可编程逻辑器件以及WIFI模块组成。实验结果表明,该系统能够更快地对原始数据进行数字滤波和提取生理参数,并计算出两路心冲击(BCG)信号的相位及两者之间的瞬时相位差,最后预测出血压值。

In order to meet the application of micro bending fiber optic sensors in blood pressure detection,an additional sensor is added to the original sensor,and the raw data are preprocessed through programmable logic devices.The system consists of two micro bending fiber optic sensors,two analog preamplifiers,two ADCs,microprocessor,programmable logic device,and WIFI module.The experimental results show that the system can quickly perform digital filtering and extract physiological parameters from the raw data,calculate the phase of two ballistocardiogram(BCG)signals and the instantaneous phase difference between them,and finally predict blood pressure values.