Aiming at effect of interfering signal of pulse sensor in process of data acquisition on system precision of measurement

an adaptive hybrid filtering algorithm is proposed. The algorithm combines amplitude limiting filtering

average recursive median filtering and recursion average filtering

aiming at influence of sampling length on filtering effect

adjust adaptive sampling window size

effectively eliminate accidental pulse and inhibit periodic pulse interference. Through testing on ten testers

electrocardiograph measurement data is compared with measurement data of pulse real-time monitoring system

using and not using adaptive hybrid filtering algorithm.Experimental results show that arithmetic mean difference of pulse measurement is about 0. 4 BPM after using filtering algorithm

improve overall about 9 times compared with the algorithm without using filtering algorithm.