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Title: Synchronization Technique for Doppler Signal Extraction in Ultrasonic Vibration Measurement Systems
Authors: Singh K.M.
Sumathi, Parasuraman
Published in: IEEE Transactions on Instrumentation and Measurement
Abstract: Doppler signal extraction through a synchronization technique is proposed for ultrasonic vibration measurement systems, which employ a pair of transducers and a vibrating object. Due to Doppler effect, the received ultrasonic signal is phase modulated. The moving window filter (MWF) tuned for the center frequency of the carrier converts phase-modulated signal into amplitude-modulated signal because of the carrier frequency variation. To retrieve the vibrating object information, the proposed technique based on MWF synchronizes its output with the phase-modulated received signal so that it can accurately track the carrier variation. The synchronization is achieved through adaptive sampling frequency adjustment. With ultrasonic carrier tracking, the Doppler signal is retrieved that carries the vibration amplitude and frequency information. The simulation results are validated through experimental investigation carried out for wide variation of the carrier by digital implementation. © 2015 IEEE.
Citation: IEEE Transactions on Instrumentation and Measurement (2015), 64(12): 3162-3172
Issue Date: 2015
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: Doppler signal
FM-to-AM conversion
phase modulation
quadrature detection
vibration amplitude measurement
vibration frequency measurement.
ISSN: 189456
Author Scopus IDs: 56672296300
Author Affiliations: Singh, K.M., Department of Electrical Engineering, IIT Roorkee, Roorkee, 247667, India
Sumathi, P., Department of Electrical Engineering, IIT Roorkee, Roorkee, 247667, India
Corresponding Author: Sumathi, P.; Department of Electrical Engineering, IIT RoorkeeIndia; email:
Appears in Collections:Journal Publications [EE]

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