Results 311 to 320 of about 1,899,314 (382)
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Transformable Ultrasonic Array Transducer for Multiscale Imaging and Beamforming
IEEE transactions on industrial electronics (1982. Print), 2022Conventional ultrasound probes have inherent limitations in some application scenarios. Because of their fixed shapes and sizes, they can hardly pass through small orifices to examine the target closely.
Qi Zhang +10 more
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Sensors and Actuators A: Physical, 2021
Lamb waves are characterized by frequency dispersion and mode conversion. The imaging results obtained with traditional ultrasonic array imaging methods suffer from artifacts, reducing the imaging accuracy.
Liu-Jia Sun +6 more
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Lamb waves are characterized by frequency dispersion and mode conversion. The imaging results obtained with traditional ultrasonic array imaging methods suffer from artifacts, reducing the imaging accuracy.
Liu-Jia Sun +6 more
semanticscholar +1 more source
Ultrasonics, 2023
Pores, grains, or textures can collectively cause microstructural inhomogeneity and anisotropy in metallic materials fabricated by additive manufacturing.
Yu Liu +4 more
semanticscholar +1 more source
Pores, grains, or textures can collectively cause microstructural inhomogeneity and anisotropy in metallic materials fabricated by additive manufacturing.
Yu Liu +4 more
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Ultrasonic array scanning of the kidney
Ultrasound in Medicine & Biology, 1974Abstract An ultrasonic scanning system has been devised, utilizing an array of six plane transducers, each used as a separate transmitter-receiver. The transducers were arranged in a concave assembly so that their beams intersected at a point equidistant from each face.
R A, Mountford, M, Halliwell, P N, Wells
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The Journal of the Acoustical Society of America, 1978
The subject of multielement ultrasonic transducers is presented, with emphasis on describing the ultrasonic transducer design techniques and time-delay pulsing schedules used to achieve real-time imaging, beam steering, and beam focusing. Transducer design techniques make use of a first-order scattering theory in fluids, which model quite nicely many ...
J. L. Rose, P. A. Meyer, M. S. Good
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The subject of multielement ultrasonic transducers is presented, with emphasis on describing the ultrasonic transducer design techniques and time-delay pulsing schedules used to achieve real-time imaging, beam steering, and beam focusing. Transducer design techniques make use of a first-order scattering theory in fluids, which model quite nicely many ...
J. L. Rose, P. A. Meyer, M. S. Good
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Ultrasonic transducers and arrays
IEEE Engineering in Medicine and Biology Magazine, 1996Ultrasonic imaging is one of the most important and still growing diagnostic tools in use today. To better understand transducer/array performance and some of the factors that prevent ultrasonic imagers from reaching higher resolution, this article reviews past achievements and current developments in the technology, including piezoelectric materials ...
K.K. Shung, M. Zippuro
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Ultrasonic and phased-array inspection in titanium-based alloys: A review
Proceedings of the Institution of mechanical engineers. Part E, journal of process mechanical engineering, 2022Ultrasonic testing procedures are among the most extensively used techniques in non-destructive testing and non-destructive evaluation systems. Meanwhile, phased array inspection or phased-array ultrasonic testing techniques as a well-known type of ...
Hongyuan Shi +4 more
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3D-Printed Integrated Ultrasonic Microneedle Array for Rapid Transdermal Drug Delivery.
Molecular Pharmaceutics, 2022Transdermal drug delivery (TDD) is an attractive alternative to oral and hypodermic injection drug administration, and is poised to increase its impact on medicine and pharmaceutical design.
Zi‐Yi Chen +6 more
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Self-localization with ultrasonic sensor array
2008 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2008We have developed a positioning system that uses a phased array sensor to measure the distance and direction of multiple landmarks relative to the position of a mobile robot so that the robot can self-localize. The positioning system can control the strength and the width of the beam from the phased array sensor and observe the multiple landmarks at ...
Yukihiko Ono +5 more
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Robot guidance using ultrasonic arrays
Journal of Robotic Systems, 1994AbstractThe flexibility of robots can be considerably increased by having sensors that can detect the location and orientation of the components that are being manipulated by the robots. Vision systems have been widely applied to this problem, but there has been very little reported work on the use of ultrasonic sensors. This article reports the use of
Philip Webb, Ian Gibson, Catherine Wykes
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