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Optical detection of ultrasonic disturbances
ICALEO '88: Proceedings of the Optical Sensing and Measurement Conference, 1988Optical methods for the detection of ultrasonic signals offer the potential for performing noncontact and remote sensing for ultrasonic inspection and acoustic emission testing of materials and structures. These capabilities are of particular advantage for sensing applications at elevated temperatures or in hostile environments.
James W. Wagner, Aaron Gara
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Ultrasonic detection of fatigue damage
Engineering Fracture Mechanics, 1972Abstract Results are reported of recent experiments which used change in ultrasonic attenuation measurements as a continuous monitor of fatigue damage during cyclic testing of polycrystalline aluminum and steel specimens. Ultrasonic pulses were generated by an x-cut quartz transducer firmly attached to the clamped end of a specimen rod using Eastman ...
Narayan R. Joshi, Robert E. Green
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Focused Ultrasonic Transducer for Aircraft Icing Detection
UltrasonicsUltrasonic detection technique (UDT) serves as a pivotal method for monitoring aircraft icing conditions. However, the inherently porous and irregular shape of atmospheric ice leads to a pronounced attenuation of ultrasonic wave energy during propagation.
Yan, Wang +6 more
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Ultrasonic detection of subsurface flaws
Chemical and Petroleum Engineering, 2006New experimental relationships of coefficients of reflection and transmission of ultrasonic waves in artificial surface and subsurface models of cracks have been obtained in a wide range of parameters.
S. K. Pavros, A. V. Polupan
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Ultrasonic detection in robotic environments
Proceedings of IEEE International Conference on Robotics and Automation, 2002Based on information produced by a 200 kHz ultrasonic echo device developed for robotics and other industrial purposes, a method for object identification was developed and is presented in this paper. Interpretation of the echos from the reflecting objects, complexity analysis and information extraction were made by system identification methods such ...
L. Sobral +3 more
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Resonant ultrasonic vibration detection study
AIP Conference Proceedings, 2002Contact and non-contact (optical) vibration detection methods, used in a resonant ultrasound spectroscopy application, are discussed in a comparative manner. The noise-floor for three different methods of vibration detection are quantitatively compared using a unique experimental configuration which employs spherical resonators.
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Ultrasonic Detection of Urethral Calculus
British Journal of Urology, 1985J, Gammelgaard, S M, Hastak
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Ultrasonic detection of electric discharges
Electrical Engineering, 1956AT PRESENT the methods used to detect failures during factory tests of electrical apparatus are of sufficient sensitivity to detect all real faults that occur. However, these methods sometimes do not supply sufficient information for laboratory research and developmental tests of coil stacks and other types of insulation structures.
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Ultrasonic detection of combined pregnancies
American Journal of Obstetrics and Gynecology, 1979openaire +2 more sources