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Published on: August 5, 2015
Measurement of ultrasonic velocity with improved accuracy in pulse echo setup
S Rajagopalan1, S J Sharma, P K Dubey
1Department of Electronics, RSTM Nagpur University, Nagpur, Maharastra, India.
Abstract:
In the present work a personal computer based circuit adopted in pulseecho setup has been developed for the measurement of time-of-flight between the two successive echoes using a differential time measurement with a 16 bit counter and an external clock frequency of 32 MHz. A control program is developed in C to display the time of flight and wave propagation velocity on a user screen. The technique, so developed, minimizes the errors in time delay measurements due to the variation in threshold trigger points of echoes and improves the ultrasonic velocity measurement.
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