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2007, 12

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

Low cost virtual instrumentation using PC printer port for ultrasonic velocity measurements

language: English

received 01.06.2007, published 03.07.2007

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The most popular and effective technique for ultrasonic velocity measurements is the pulse technique. In the present work, PC based single-pulse sender/receiver system is developed using indigenous components and the bi-directional printer port. A program written in C, under the DOS/WINDOWS environment, controls the pulse generation, detection and travel time measurement. A radio frequency burst of 2 MHz of 5 ms width is obtained from an external source. This pulse is amplified and sent to the transmitting transducer. The received pulse is detected and is used to stop the counter. The number of pulses is counted using a 32 MHz external crystal source. The count is read by printer port and is further used in determining the travel time and to display the ultrasonic velocity of propagation in the medium on the computer screen. The system developed has been tested for ultrasonic velocity measurements in standard liquids. It has been found that the ultrasonic velocity measurement results obtained using the above system match well with those reported in the literature.

Keywords: ultrasonic velocity, ultrasonic measurements, pulse technique, bidirectional printer port

8 pages, 6 figures

Сitation: S. Rajagopalan, S. J. Sharma, V. M. Ghodki. Low cost virtual instrumentation using PC printer port for ultrasonic velocity measurements. Electronic Journal “Technical Acoustics”,, 2007, 12.


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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

e-mail: rajag_ngp(at)


Dr. Satish J. Sharma has completed his M.Sc., M.Phil. and Ph.D. from Nagpur University. He is working as a Reader in the Dept. of Electronics, SKP College, Kamptee (Nagpur). He is actively involved in the research since 1987 and has published 17 papers in National and International Journals. Three candidates have submitted Ph. D thesis under his guidance and eight are in the queue. He has completed number of projects funded by UGC, New Delhi. He is a life member of number of different organizations. He has been awarded the Indian Science Academy-Indian National Science Academy-National Academy of Sciences (India) fellowship.

e-mail: sjsharma(at)


Vilas M Ghodki completed his M.Sc. In Electronics, PG Diploma in Computer Science and MBA. He is working as a Selection Grade Lecturer in JB College of Science, Wardha since last 20 years. He submitted his thesis for the award of Ph.D. Degree. 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 presented four papers at Nation and International conferences.

e-mail: nanditag_wda(at)