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2010, 5

S. Rajagopalan, S. J. Sharma, V. M. Ghodki

Design of virtual sing-around system for precise ultrasonic velocity measurements

language: English

received 27.02.2010, published 19.03.2010

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A virtual sing-around system with operating frequency of 2 MHz has been developed in the laboratory using PCL 812 data acquisition card along with IBM compatible PC using. The necessary circuit elements such as wide band amplifier, detector, pulse shaper etc. were designed using indigenous components. Powerful and effective data acquisition software at the back end has been written in “C” programming language that controls pulse generation, detection, re-triggering and travel time measurement. User friendly and interactive GUI screen has been designed in Visual Basic at the front end to accomplish the data acquisition, parameter setting, file manipulation, control and synchronization of the other functions involved in the measurements. Standard external quartz crystal oscillator of 32 MHz has been used to measure the travel time. Improved accuracy in travel time measurements has been obtained.

Keywords: ultrasonic velocity, virtual instrumentation, virtual sing-around system, data acquisition card, GUI screen.

8 pages, 3 figures

Сitation: S. Rajagopalan, S. J. Sharma, V. M. Ghodki. Design of virtual sing-around system for precise ultrasonic velocity measurements. Electronic Journal “Technical Acoustics”,, 2010, 5.


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Dr. S Rajagopalan an eminent scholar in the field of acoustics and Electronics. He did his M.Sc. and Ph.D. in physics. He was a Professor and Head of the Dept. of Physics and Dept. of Electronics in RTM Nagpur University. He has more than 200 papers published in National and international Journals. Seven candidates completed Ph.D. under his able guidance and seven are in the queue. He is honored by number of awards in the field of acoustics. He is also a head of acoustics consultancy, completed nearly about 220 projects in acoustics design. The details are available on



Dr. Satish J. Sharma is an Associate Professor in the Department of Electronics and Computer Science, RTM Nagpur University, Nagpur (India), since December 2008. He did his M. Sc., M. Phil. and Ph. D. from Nagpur University, Nagpur (India). He was a visiting scientist to International Centre for Theoretical Physics (ICTP), Trieste, Italy in 1999, National University of Singapore, Singapore in 2003 and a visiting consultant to Sultan Qaboos University, Muscat, Oman in 2008. His main research interests include acoustics, virtual instrumentation, nanoscience and nanotechnology. He has published over 37 research papers in national and international journals and his thesis Ultrasonic Propagation Studies in Polymers has been published as a book with support from UGC, New Delhi (India). Four of his research papers have won the best paper awards at national and international symposia. He is the life member of Instrument Society of India, Ultrasonic Society India, Indian Physics Association and a member of Materials Research Society, Singapore (2003-04).

e-mail: sjsharma(at)


Dr. Vilas M Ghodki completed his M Sc. in Electronics, Ph. D. PG Diploma in Computer Science and MBA. He is working as a Associate Professor in J B College of Science, Wardha since last 23 years. His field of interest are Microprocessor programming and Virtual Instrumentation. He is a life member of Ultrasonic Society of India and Instrumentation Society of India. He has four paper publications at his credit. He also attended many Nation and International conferences. He convened a National seminar in 2008. He completed two projects funded by UGC India.

e-mail: vilasghodki(at)