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Optimization of Ultrasonic Phased Arrays
1998Ultrasonic phased arrays are an emerging technology in nondestructive evaluation (NDE) applications. A phased array is a multi-element piezo-electric device whose elements are individually excited by electric pulses at programmed delay times [1]. Such a delay scheme allows electronically controlled dynamic beam control.
Wooh, Shi-Chang, Shi, Yijun
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Calibration of ultrasonic phased arrays for industrial applications
2017 IEEE SENSORS, 2017This paper investigates the consistency in phased array element performance by extracting information from the Full Matrix Capture (FMC) of a reflection from a planar interface. The purpose of this work is to generate a robust methodology for tracking phased array performance over time, therefore, ensuring the reliability of measured data.
Marcus Ingram +6 more
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Ultrasonic phased arrays for nondestructive testing
NDT International, 1987Abstract Although ultrasonic phased arrays are potentially ideally suited to many applications in NDT, their use in practice is limited by the complexity of array probe manufacture and the bulk and cost of the associated electronic control instrumentation.
A. McNab, M.J. Campbell
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Quantitative ultrasonic phased array imaging
AIP Conference Proceedings, 2014When imaging with ultrasonic phased arrays, what do we actually image? What quantitative information is contained in the image? Ad-hoc delay-and-sum methods such as the synthetic aperture focusing technique (SAFT) and the total focusing method (TFM) fail to answer these questions.
Brady J. Engle +2 more
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An Ultrasonic Phased Array Applicator for Hyperthermia
IEEE Transactions on Sonics and Ultrasonics, 1984An ultrasonic phased array applicator for hyperthermia provides electronic steering of the sound beam rather than mechanical movement of the transducer assembly. An applicator consisting of a stack of linear phased arrays is examined. The effects of various design parameters, including individual array height and length, are discussed.
K.B. Ocheltree +3 more
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FUNDAMENTALS OF ULTRASONIC PHASED ARRAYS
Modern Physics Letters B, 2008It is shown that the wave field of an ultrasonic linear array is closely related to that of an equivalent single element transducer. Using this relationship, it is demonstrated how one can construct a simple and efficient ultrasonic beam model for the wave field of a steered linear array.
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Phase Aberration Correction of Ultrasonic Phased Array Signals
2008 Congress on Image and Signal Processing, 2008By properly adjusting the time delays, phased arrays can dynamically phase-steer and focus the ultrasonic beams. But phase aberration due to perturbation of system and materials degrade ultrasound performance by disrupting the ultrasound beam focus.
Xia Zhao, Zhaoba Wang, Bin Liu
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Improvement of ultrasonic testing by phased arrays
Nuclear Engineering and Design, 1983Abstract Methods for defect reconstruction and classification using the flexible and fast electronic beam forming with phased arrays have been described. Using the electronic sector scan, a reflecting point is represented as a short circular curve, the length of which is dependent upon beam width and system sensitivity.
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Characteristics of an ultrasonic phased array transmitter in medium range
Ultrasonics, 2018An ultrasonic phased array transmitter (PAT) consisting of 12×12 elements was designed and fabricated to evaluate its experimental characteristic performance in the medium range of 2m-10m for its directivity, pulse width affect and sound pressure level (SPL) measurements as a function of distance from its center in the open air. The SPL was measured at
Sahdev, Kumar, Hideo, Furuhashi
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Pressure Vessels Inspections Using Ultrasonic Phased Arrays
Ultrasonic Nondestructive Evaluation for Material Science and Industries, 2003Phased arrays offer significant technical advantages for weld inspections over conventional ultrasonics. The phased array beams can be steered, scanned, swept and focused electronically. Beam steering permits the selected beam angles to be optimized ultrasonically by orienting them perpendicular to the predicted defects, especially Lack of Fusion ...
M.D.C. Moles, F. Jacques, N. Dube
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