摘要
消除心电图的基线漂移是个重要问题。本文采用分片三次埃尔米特插值来作基线漂移校正,提出了当心率变化引起插值区间信号长度变化时,插值基函数的线性变换规则。由此可以保持拟合的高精度,又减少计算量,有可能用于实时心电监护。如果监护仪中的CPU能力有限,本文还提出了一种计算埃尔米特插值函数的硬件电路,使每一点的计算时间缩短为12μS。
ECG base-line drift cancellation is an important problem.This paper uses segmenting 3-order Hermite interpolation for base-line drift correction,and presents a linear transformation rules of interpolation basic functions when the signal length of interpolation interval changes owing to the changing of heart rate.This correction technique has higher precision of approaching and less amount of computing, and it can be used for real-time ECG monitor. In addition, this paper presents a design of hardware circuits for computing the Hermite interpolation function,and the time for computing one point is only 12μS.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1990年第4期35-41,共7页
Acta Electronica Sinica
