Results 211 to 220 of about 10,296 (259)
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ELECTRONIC ARRAY PROBE FOR ULTRASONIC IMAGING
The Journal of the Acoustical Society of America, 2010An electronic array probe for ultrasonic imaging includes an array of transmitting and/or receiving electroacoustic transducers arranged in concentric bands in which the transducers are tangent to one other in both radial and circumferential directions.
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Automatic ultrasonic robotic array
2013 IEEE International Ultrasonics Symposium (IUS), 2013A novel, autonomous reconfigurable ultrasonic phased array inspection robot for non-destructive evaluation (NDE) is presented. The robotic system significantly will reduce manual labor over current inspection regimes, as well as enabling inspection of inaccessible/hazardous areas such as those found in the nuclear and petrochemical industries.
Dobie, Gordon +5 more
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Ultrasonic transducer array used in ultrasonic diagnosis apparatus
The Journal of the Acoustical Society of America, 1989In an ultrasonic transducer array used in an ultrasonic diagnosis apparatus, the pitch of transducer elements of peripheral subarrays is made smaller than that of a central subarray. The central transducer elements are adapted for acquiring a tomogram of an object to be examined, and the peripheral transducer elements are adapted for acquiring flow ...
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Transducer arrays in medical ultrasonics
The Journal of the Acoustical Society of America, 1978Ultrasonic instrumentation based on linear and phased array transducers is increasingly being used in clinical diagnosis and yields information not hitherto available. However, the use of ultrasonic arrays is not necessarily restricted to diagnosis. They may, in the future, play an important role in therapy as well.
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Ultrasonic Array Design and Performance
1979Acoustical imaging obeys the fundamental laws of optics. When an object is visualized with a given system (optical or acoustical) the image obtained is the convolution of the object and the system transfer function. This is exactly what takes place when acoustical signals, reflected from a biological structure, are received by an array of transducers ...
Ph. Defranould, J. Souquet
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Ultrasonic phased array systems
The Journal of the Acoustical Society of America, 1980Ultrasonic phased array method and apparatus for the static or dynamic investigation of structures, such as organs of the body, or intra-uterine detail, wherein ultrasonic echo pulses, reflected back from a testpiece to one or a group of adjacent transducers of a linear transducer array, are converted to corresponding electric signals which are then ...
James M. S. Hutchison, Robert D. Selbie
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The Journal of the Acoustical Society of America, 1989
An ultrasonic probe used for ultrasonic diagnosis apparatus. A plurality of ultrasonic transducer elements are provided in a convexity at the tip of a probe so as to constitute a convex array ultrasonic probe. The curvature radius of the convexity is set at not greater than 12 mm and the pitch of adjacent transducer elements is set at not greater than ...
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An ultrasonic probe used for ultrasonic diagnosis apparatus. A plurality of ultrasonic transducer elements are provided in a convexity at the tip of a probe so as to constitute a convex array ultrasonic probe. The curvature radius of the convexity is set at not greater than 12 mm and the pitch of adjacent transducer elements is set at not greater than ...
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Movable ultrasonic transducer array
The Journal of the Acoustical Society of America, 1986@ A movable, ultrasonic transducer array for use in an ultrasonic inspection system that employs a signal detector and display of the liquid crystal cell (18) type. The movable array uniformly insonifies the object (16) to be inspected and is particularly for inspecting large objects or large areas of an object.
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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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Ultrasonic contact transducer and array
The Journal of the Acoustical Society of America, 1994A flexible ultrasonic contact transducer comprises an unpoled polymeric film layer and a poled piezo film layer. Electrode shielding layers are disposed on outer surfaces of the unpoled polymeric film layer and poled piezo film layer. A quarter wave reflector is disposed between inner surfaces of the two layers.
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