39,476 research outputs found
An Application of Internal Model Principle to the Vibration Control of Flexible Manipulator
No full textAn optimal network-flow-based simultaneous diode and jumper insertion algorithm for antenna fixing
No full textScreen Printed Piezoceramic Actuators/Sensors Microfabricated on Organic Films and Stretchable Networks
No full textIntegration, deployment, and installation of SHM network hardware remains a
significant challenge inhibiting fielding of SHM systems. SHM systems typically
consist of sparse arrays of numerous transducers and large scale wiring in order to
span target structures. These systems are currently assembled, one piece at a time, and
installed by hand leading to significant labor costs. Because of the size and weight of
the components they adversely affect and are parasitic to the host structure. This is
particularly detrimental to high performance aerospace structures.
Microfabricated stretchable sensor networks have received a lot of interest recently
and have the potential to overcome these issues. These systems leverage nonstandard
C-MOS processing techniques to mass fabricate micro and nano-scale device in a
single integrated system. The complete system of devices with interconnecting wires
is then expanded to span an area orders of magnitude greater than the original
fabrication area. The result is a complete integrated network of numerous of small
scale devices that will have minimal parasitic effects on a host structure and can be
installed monolithically over large areas. However, fabrication limitations previously
restricted the types of systems that could be created on these networks to passive,
resistive devices like resistive temperature sensors and wiring.
This paper presents an overview of recent research that has enabled the mass
fabrication and deployment of screen printed piezoceramic transducers on organic
stretchable network substrates including fabrication, deployment, and testing.
Ultrasonic signals typical to SHM were actuated and detected as were strain waves
from impacts. Results indicate that the screen printed piezoceramic transducers
released and deployed on an organic substrate produce similar signal amplitudes as a
baseline sample as printed on a silicon substrate.
This work enables the mass fabrication and deployment of large arrays of
microfabricated sensors, applicable to ultrasonic damage detection systems, on
stretchable networks. This has the potential to revolutionize structural health
monitoring by simplifying fabrication, installation and reducing the parasitic effects on
host structures like added weight or volume
Piezoresistive response induced by piezoelectric charges in n-type GaAs mesa resistors for application in stress transducers
No full text
Piezo-resistive Response Induced by Piezo-electric charge in n-type GaAs Mesa Resistor for Application in Stress Transducer
No full textA segment of Staphylococcus aureus clumping factor A with fibrinogen-binding activity (ClfA221–550) inhibits platelet-plug formation in mice.
No full textPreparation and characterization of gold nanoflowers and gold/iron oxide nanowires and nanonetworks
No full textLow nest survival of a breeding shorebird in Bohai Bay, China
No full textQue P, Chang Y, Eberhart-Phillips L, Liu Y, Szekely T, Zhang Z. Low nest survival of a breeding shorebird in Bohai Bay, China. Journal of Ornithology. 2015;156(1):297-307
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