| Hybrid Packaging and Integration Methods for Miniature Ultrasound Imaging Array |
JAN 1997 |
25 pages |
| Authors:
Clyde G. Oakley; TETRAD CORP ENGLEWOOD CO
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 | The feasibility of building small ultrasound imaging arrays with integrated electronics was explored. These arrays can be used to build laparoscopic, articulated, ultrasound imaging probes for use at forward military surgical locations or in emergency rooms and surgical suites. To achieve this goal, the critical items required are active multiplexer electronics and a multilayer interconnect means which provides for mounting and connection of 128 individual array elements to the imaging ... |
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| Subwavelength Monopole Underwater Sound Radiator. |
14 FEB 1984 |
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| Authors:
W. F. Wardle; DEPARTMENT OF THE NAVY WASHINGTON DC
|
 | A compact subwavelength size monopole underwater sound radiator has characteristics to maximize resistive radiation impedance, minimize reactive radiation impedance, facilitate heat dissipation and minimize compensating air usage. This results in improved efficiency, bandwidth and use factor. The underwater sound radiator uses two back-to-back mounted, frustum shaped, hollow, radiating shells to achieve radiation characteristics approximating those of an equivalent sized pulsating sphere. An elliptically shaped, uniform cross-section magnetostrictive ring crossed by ... |
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| Acoustic Emission Spectral Calibration and Analysis. |
JUN 1978 |
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| Authors:
C. M. Scala; I. G. Scott; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| A detailed description is given of an acoustic emission (AE) calibration system based on the use of a helium jet. Reasons for the choice of the helium jet are given and various other simulated sources of AE are discussed in terms of their suitability for calibration of AE systems. (Author) |
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| A Two Dimensional Electronically Focused Imaging System, |
1974 |
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| Authors:
J. Fraser; J. Havlice; G. S. Kino; W. Leung; H. J. Shaw; STANFORD UNIV CA MICROWAVE LAB
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| A two dimensional acoustic imaging device, with electronic focusing and scanning in both directions was constructed. The device is designed to work with 2.25 MHz acoustic waves. It employs M piezoelectric elements in a transmitting transducer, which produce a beam focused and scanned in the y direction. An N element receiving transducer is used to focus and scan in the x direction. This makes it possible to obtain M by ... |
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| A New Acoustic Imaging Device, |
1973 |
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| Authors:
j. f. havlice; G. S. Kino; C. F. Quate; STANFORD UNIV CALIF MICROWAVE LAB
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| AN INVESTIGATION OF IMPROVED SAMPLE HANDLING PROCEDURES IN ULTRASONIC NEBULIZATION TECHNIQUES |
DEC 1968 |
15 pages |
| Authors:
Louis E. Owen; TOMORROW ENTERPRISES PORTSMOUTH OH
|
| An ultrasonic nebulizer based on flowing a sample solution across the vibrating face of a piezoelectric crystal produces an aerosol useful for instrumental analytical techniques. The piezoelectric element is coated with a ceramic glaze resistant to many analytical solutions. Different and better coatings will be needed, however, for especially corrosive solutions. Ultrasonic nebulizers inherently more resistant were designed but had limited operational life and were not perfected during this study. ... |
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| DC CAPACITIVE FUZING SYSTEM FOR SMALL PROJECTILES |
18 MAY 1965 |
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| Authors:
Edward A. White; NAVAL ORDNANCE LAB WHITE OAK MD
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| A study of dc capacitive fuzing schemes for small projectiles (20 and 40mm) was conducted. Due to the packaging limitations of the projectile, it was necessary to use relatively low operating voltages (200-400 volts), which limits the effective charge capacity of the probes. The conclusions drawn from this study are that standoff distances greater then the projectile length cannot be reliably attained. As a result, it was decided that further ... |
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| THE RECIPROCITY CALIBRATION OF PIEZOELECTRIC ACCELEROMETERS WITH SUPPLEMENT |
AUG 1953 |
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| Authors:
MARK HARRISON; A.O. SYKES; DAVID TAYLOR MODEL BASIN WASHINGTON DC
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| DESIGN AND CONSTRUCTION OF CRYSTAL TRANSDUCERS |
30 SEP 1946 |
1 pages |
| Authors:
F.N.D. KURIE; OFFICE OF SCIENTIFIC RESEARCH AND DEVELOPMENT WASHINGTON D C
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PIEZOELECTRIC TRANSDUCERSZ
