Results 241 to 250 of about 934,305 (288)
Some of the next articles are maybe not open access.
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.
openaire +1 more source
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 ...
openaire +1 more source
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 ...
openaire +1 more source
Ultrasonic imaging using arrays
Proceedings of the IEEE, 1979An analysis is presented of the two general types of arrays-the direct imaging array and the phased array. These are analyzed over three levels of approximation: geometric optics, steady-state sinusoidal diffraction, and wide-band diffraction. Systems are studied which provide electronic deflection and focusing.
openaire +1 more source
Boosting the application of ultrasonic arrays
AIP Conference Proceedings, 2002The strategy currently pursued at IZFP to open a wider field of applications for ultrasonic arrays is described. A bundle of measures is performed to reduce the costs and at the same time to improve the capabilities and the reliability of ultrasonic array systems.
openaire +1 more source
2001
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001. ; Includes bibliographical references (leaves 58-59). ; by Ji-yong Wang. ; S.M.
openaire +1 more source
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001. ; Includes bibliographical references (leaves 58-59). ; by Ji-yong Wang. ; S.M.
openaire +1 more source
An Ultrasonic Wheel-Array Probe
AIP Conference Proceedings, 2004This paper describes the development and modeling of an ultrasonic array wheel probe scanning system. The system operates at 10 MHz using a 64 element array transducer which is 50 mm in length and located in a fluid filled wheel. The wheel is coupled to the test structure dry, or with a small amount of liquid couplant. When the wheel is rolled over the
openaire +1 more source
Evaluation of material degradation using phased array ultrasonic technique with full matrix capture
Engineering Failure Analysis, 2021Santhakumar Sampath +2 more
exaly
An Analysis of Pulsed Ultrasonic Arrays
1980Array theory was developed on the foundation of steady-state analysis. In the electromagnetic regime this has, until now, been acceptable since even short pulses (in time) were physically long (in space). In the ultrasonic regime, however, physically short pulses are common (due to slow velocity of propagation).
openaire +1 more source
Measurement Models for Ultrasonic Arrays
2014In the previous two chapters we showed how the response of a pair of send-receive array elements can be modeled in terms of two components: (1) a system function that describes all the electrical and electromechanical parts of the elements and their driving/receiving sub-systems, and (2) an acoustic/elastic transfer function that describes all the ...
openaire +1 more source