Abstract:

By utilizing the wavelet transform which has an ability to reveal lowfrequency signal and highfrequency signal, the powerfrequency and baseline wander interference in pulse signal is eliminated.The signal period is detected with the reconstructed detail signal.Every pulse period can be drawn up with spline fitting.The feature points of the denoised signal are detected with the first derivative of the spline fitting function and the integral function.At last we find out the relationship between the feature of the pulse and the physiological significance.

Key words: pulse signal;wavelet transform;spline fitting;feature points of pulse signal