Design, development and Comparative performance analysis of Bessel and Butterworth filter for Nadi Pariksha yantra
Pavana Mysore Ganesh, M. N. Shashikala, Manisha Joshi · 2016
Nadi pariksha is a very ancient Indian system of Ayurvedic medicine which uses pulse signal from radial artery as means for diagnosis of diseases. It assists the Ayurvedic practitioners in routine diagnostic procedure. This paper presents experimental work in the design of pre-processing module in the Nadi pariksha yantra. Spectral analysis of Tridosha signals and Comparative analysis of Butterworth and Bessel filter has been presented. 8thorder Bessel filter retains periodicity and reduces ringing and overshooting effects of the Tridosha signals. Spectral analysis has been implemented to identify the cut-off frequency of acquired Tridosha signal using NI LabVIEW.