基于最小二乘法多项式拟合的容积脉搏波消噪设计

目的:本文利用BCI的指夹式透射血氧探头进行容积脉搏波检测,通过信号调理放大电路、A/D转换电路、单片机和接口将采集到的数据传送到上位机.由于噪声在硬件上不能彻底去除,因此需要在软件上进行完善.方法:本文就是在MATLAB上进行基于最小二乘法多项式拟合的低通FIR滤波器消噪仿真.结果:能很好的去除工频及其他干扰,得到干净的容积脉搏波波形.结论:通过这种方法得到的波形便于在界面上实时显示和用于后期的特征提取和参数计算.

The Least Squares Polynomial Fitting Design Denoise Based on the Volume Pulse Wave Detection System

Purpose: Use of BCI clip-on probe for blood volume transmission pulse wave detection, through the signal conditioning amplifier circuit, A/D conversion circuit, microcontroller and interfaces to collected data to the PC. The applications of software filtering to improve hardware filtering. Methods: This article is carried out in MATLAB based on the least squares polynomial fitting of the low-pass FIR filter denoising simulation. Results: Removal of well-frequency and other interference, access to clean pulse volume waveform. Conclusion: To facilitate real-time display in the interface and for the latter part of the feature extraction and parameter calculation