Results 231 to 240 of about 1,545,533 (279)
Response surface modeling and correlation analyses of mechanical and non-destructive properties in graphene-date palm fiber reinforced concrete. [PDF]
Sci RepAbdou Elabbasy AA +4 more
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Measurement of sludge-water interface based on adjustable peak point of ultrasonic echo energy. [PDF]
PLoS OneLi M, Miao Y, Zhou F, Yang Y, Huang H.
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Research on Quality Inspection of PBF-LB 022Cr17Ni12Mo2 Steel Using Laser Ultrasonic Testing Technology. [PDF]
Materials (Basel)Zhang B +6 more
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Ultrasonic pulse velocity as a rock stress sensor
Tectonophysics, 1974A method of measuring with nanosecond precision the times of flight of ultrasonic pulses over distances of a few metres in rock in situ has been developed by using a multiple sampling technique, with pulses repeated at intervals of 20 msec and on-line averaging of many individual readings. In an ideal situation the measurements are sensitive to changes
Gladwin M.T., Stagey F.D.
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Image matching for pulse echo measurement of ultrasonic velocity
Image and Vision Computing, 1983Abstract Diagnostic ultrasound is a pulse echo imaging system similar to radar, sonar or exploration seismology. It has its most widespread use in the examination of pregnancy, but also finds routine use in the examination of the organs of the upper abdomen and its use is increasing in other areas. Using current techniques the information obtained is
D. E. Robinson +2 more
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Dispersion of Ultrasonic Pulse Velocity in Cylindrical Rods
The Journal of the Acoustical Society of America, 1955The velocities of pulsed longitudinal and shear waves in cylindrical rods of aluminum alloy, brass, copper, and steel were measured by using both the pulse echo and pulse transmission methods. It is found that for pulsed longitudinal waves the measured velocity not only depends upon the elastic constants of the medium but also on the ratio between the ...
L. Y. Tu, J. N. Brennan, J. A. Sauer
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Effect of stresses on the ultrasonic pulse velocity in concrete
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1991Since the stress-strain curve of a concrete is not linear, at least under the first loading, one would expect that the presence of stresses would reduce the velocity of ultrasonic pulses in the concrete. The experimental investigation of this expectation is the topic of this paper.
Sandor Popovics, John S. Popovics
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The Dispersion of Ultrasonic Pulse Velocity in Cylindrical Rods
The Journal of the Acoustical Society of America, 1954Velocity dispersion of compressional stress waves in cylindrical rods of 61S-T6 aluminum alloy has been investigated experimentally. Electronically generated pulses of the desired shape and carrier frequency were used to drive the barium titanate and quartz transducers. Both the pulse echo and pulse transmission methods were employed. It was found that
L. Y. Tu, J. N. Brennan, J. A. Sauer
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Ultrasonics, 2016 The aim of this study is to establish a correlation between physical properties and ultrasonic pulse velocity of clay samples fired at elevated temperatures. Brick-making clay and pottery clay were studied for this purpose.
İlker Özkan
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Measurement of ultrasonic velocity with improved accuracy in pulse echo setup
Review of Scientific Instruments, 2007In 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 16bit counter and an external clock frequency of 32MHz.
S, Rajagopalan, S J, Sharma, P K, Dubey
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