Measurement of ultrasonic velocity with improved accuracy in pulse echo setup |
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Authors: | Rajagopalan S Sharma S J Dubey P K |
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Affiliation: | Department of Electronics, RSTM Nagpur University, Nagpur, Maharastra, India. |
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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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