NDLI: Smart generator for ultrasonic applications

Content Provider	IEEE Xplore Digital Library
Author	Frederic, C. Patrick, S. Etienne, T.
Copyright Year	2006
Description	Author affiliation: Univ. Henri Poincare, Vandoeuvre-les-Nancy (Frederic, C.; Patrick, S.; Etienne, T.)
Abstract	This paper presents the first results for the design of an optimized generator for an ultrasonic transducer. This emitter/receptor works within the frequency range of 1 to 10 MHz. The generator output impedance equals 50 Omega and the generator itself delivers burst wave signals at a controlled fundamental frequency. The generator structure, with a negative feedback, guarantees that the optimal excitation frequency is detected. The control unit utilizes the characteristics of the transducer impedance. Optimization is carried out by an automatic search of the parallel resonance frequency for which the impedance of the transducer is maximum. We evaluate the impedance module from the envelope of the signal present at the transducer input. The criterion to be maximized is the level of the envelope in established mode. The detection of the optimal frequency is based on the iterative algorithm of the gradient in which the frequential step is functional to the criterion differential. The results, carried out initially on a electric model of a transducer, give a settling time of one millisecond for a frequential resolution of 3 KHz around the optimal frequency
Starting Page	3095
Ending Page	3098
File Size	169767
Page Count	4
File Format	PDF
ISBN	1424403901
ISSN	1553572X
DOI	10.1109/IECON.2006.347665
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-11-06
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic applications Frequency Impedance Signal generators Design optimization Ultrasonic transducers Automatic generation control Negative feedback Automatic control Resonance
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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