"For extreme conditions (high pressure, high temperature) the acoustic adaptation layer with a kind of Lambda/4 matching can be replaced by thin metall sheets of e.g. Aluminium and copper or steel. Both can represent a spring/mass system tuned to the resonant frequency of the piezoceramic.The bonding between the sheets can be oil or at higher temperature glaspowder. You may find some description of tbis receipe at K. Matthies.(BAM-Berlin) Concerning your demand for a software to calculate the behaviour of such layered probe systems, I would like to draw your attention to a quadrupol software model which is used at BAM and at other places developped by the author of those lines. The program package is available at BAM. It calculates for a given thickness mode piezoceramic element together with an unlimited number of matching layers, with attenuation loads and with tuning inductances and cables the spectrum and pulse response for a Dirac pulse excitation.
Re: Transducers for high pressure HUNDER(tm) - Taking the Industry by Storm!
Face International Corporation of Norfolk, Virginia has begun sale and shipment of its revolutionary THUNDER Actuators and Sensors to leading researchers, technology developers and product innovators across the country. With a variety of THUNDER devices from which to choose, FACE is looking to identify additional buyers interested in establishing a strong competitive position for their organizations on the leading edge of this emerging technology.
FACE is the premier manufacturer of these powerful new THUNDER Actuators and Sensors, invented and patented by NASA. In addition, FACE's licenses from NASA give the company the capability of providing certain significant competitive advantages to FACE's THUNDER clients.
Winner of a 1996 R&D 100 Award, THUNDER technology introduces a versatile family of ultra-high performance piezoelectric devices with the promise of significant benefits to numerous applications...from motion control to ultrasonic imaging, pump and valve products to position and flow sensing. Thanks to a novel manufacturing process, THUNDER devices offer
a number of important advantages over conventional technology: very high displacement, substantial force, ruggedness, reliability, energy efficiency...and they're relatively inexpensive.
As sensors, THUNDER devices produce an extraordinarily high output voltage, thus simplifying system design by reducing the need for amplifiers and filters. These are tough, durable, solid state devices that can be custom designed and fabricated to meet a wide variety of dimensional requirements or performance specifications.
We would like to provide you with further information about our THUNDER Actuators and Sensors and about the capabilities of Face International...both as a manufacturer and as an important R&D resource.
Would you please advise as to the best contacts within your organization and their mailing addresses?
In the meantime, please check out our new website at www.faceco.com for the latest in product information and laboratory data.
Thanks Very Much
Allison Clay Sales and Marketing Associate Face International Corp. 427 W. 35th St. Norfolk, VA USA 23508