SENSORS, 2002 IEEE
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Các bài báo tiêu biểu
New surface acoustic wave gas sensor of the mass-sensitive type sensitive to the thermal properties of gases
Tập 1 - Trang 372-375 vol.1
The basic principles of a new surface acoustic wave (SAW) gas sensor are
described. Being essentially a sensor of the mass-sensitive type, the proposed
device possesses certain features of the thermometric SAW sensors and is not
only sensitive to the vapors of volatile substances, but capable of detecting
gases by their thermal properties as well. This principles consists of making a
certain delay...
#Surface acoustic waves #Acoustic waves #Gas detectors #Gases #Temperature sensors #Sensor phenomena and characterization #Thermal sensors #Sensor systems #Surface acoustic wave devices #Acoustic sensors
The wavelength sensor using optical directional coupler
Tập 1 - Trang 83-85 vol.1
This paper proposes a wavelength sensor based on an optical directional coupler.
The finite-difference time-domain (FDTD) method is used to calculate of the
light intensity propagating thorough the structure, and to find the appropriate
dimensions of the structure. The device with the width and thickness of 0.4 /spl
mu/m/spl times/0.6 /spl mu/m, which corresponds to the coupling length of 40
/spl ...
#Optical sensors #Directional couplers #Optical propagation #Finite difference methods #Optical refraction #Optical variables control #Time domain analysis #Optical coupling #Refractive index #Signal resolution
Dynamic link labels for energy efficient MAC headers in wireless sensor networks
Tập 2 - Trang 1520-1525 vol.2
Sensor data typically consists of packets with small payloads due to which the
MAC header is a significant and energy-expensive overhead. We present a scheme
that replaces conventional MAC addresses with dynamically assigned short link
labels that are spatially reused. This would be useful in self-configuring
sensor networks. We also present an encoded representation of these labels for
use in dat...
#Energy efficiency #Intelligent networks #Wireless sensor networks #Sensor phenomena and characterization #Distributed algorithms #Scalability #Batteries #Payloads #Routing #Telecommunication traffic
Organic molecular thin films as gas sensors
Tập 2 - Trang 1144-1147 vol.2
In this paper we will present some interesting data on the gas sensitivity of
very thin films of metal phthalocyanine (as copper phthalocyanine, CuPc) towards
NO/sub 2/ at very low concentration (ppb). A thermal treatment following the
deposition strongly enhances the gas sensitivity. We will relate this high gas
sensitivity to the surface morphology of the film. In fact atomic force
microscopy da...
#Thin film sensors #Gas detectors #Thermal force #Rough surfaces #Surface roughness #Surface morphology #Surface treatment #Atomic force microscopy #Transistors #Copper
Can microTAS be alternatives for sensors?
Tập 1 - Trang 680-683 vol.1
In a brief introduction it is described how sensors and microTAS both attempt to
meet the industrial need for in-situ monitoring in a different way. As examples
of microTAS with monitoring capabilities a plasma emission detector and a
bioreactor are presented.
#Chemical sensors #Biosensors #Electrodes #Educational institutions #Chemical and biological sensors #Monitoring #Plasma chemistry #Plasma measurements #Plasma applications #Gas detectors
Optical and electrical gas sensing properties of In/sub x/O/sub y/N/sub z/ films
Tập 1 - Trang 623-626 vol.1
In this paper we describe the optical and electrical gas sensing properties of
In/sub x/O/sub y/N/sub z/ films promoted by an ultra-thin gold overlayer. We
have fabricated In/sub x/O/sub y/N/sub z/ films with a nanocrystalline porous
structure by RF-sputtering in Ar/N/sub 2/ followed by an annealing process. Gold
particles with 20-30 nm diameter on top of the In/sub x/O/sub y/N/sub z/ films
have b...
#Optical films #Optical sensors #Temperature sensors #Absorption #Wavelength measurement #Gold #Hydrogen #Temperature measurement #Fluid flow measurement #Temperature distribution
A kinetic study of analyte-receptor binding and dissociation for surface plasmon resonance biosensor applications
Tập 1 - Trang 282-287 vol.1
A fractal analysis which takes into account the effect of surface heterogeneity
brought about by ligand immobilization on the reaction kinetics is presented.
The binding and dissociation of estrogen receptors ER/spl alpha/ and ER/spl
beta/ to different ligands is analyzed within the fractal framework. The
heterogeneity on the biosensor surface is made quantitative by using a single
number, the fra...
#Kinetic theory #Plasmons #Resonance #Biosensors #Fractals #Endocrine system #Humans #Wildlife #Erbium #Regression analysis
Commercialization of harsh environment microsystems - existing challenges
Tập 2 - Trang 1105-1108 vol.2
This paper describes the existing challenges being experienced by the Glennan
Microsystems Initiative in its goal to commercialize microsystems technology for
application in harsh environments. The Glennan Microsystems Initiative develops,
applies and commercializes microsystems technology for harsh environments. This
Initiative integrates and augments substantial microsystems resources that
curre...
#Commercialization #Space technology #NASA #Manufacturing industries #Chemical sensors #Research and development #Bridges #Silicon carbide #Microsensors #Government
Sensor applications at Kennedy Space Center (KSC)
Tập 2 - Trang 1713-1717 vol.2
Transducers used at KSC, in support of processing and launch of flight vehicles
and payloads, are designed and tested to meet specific program requirements. Any
equipment, transducer or support instrumentation in direct contact or in support
to flight vehicle operations is considered ground support equipment (GSE) and
required to meet strict program requirements (i.e. Space Shuttle Program, Space
...
#Transducers #Ground support #Instruments #Space shuttles #Payloads #Testing #Land vehicles #Road vehicles #Space stations #Space vehicles
Silicon micromechanical structures fabricated by electrochemical process
Tập 1 - Trang 575-579 vol.1
Silicon (Si) micromechanical structures were fabricated by means of sacrificial
layers defined with porous silicon (PS) and masked by hydrogen ion implantation
with adequate thermal annealing. The fabrication process to remove the PS layers
with diluted KOH at room temperature does not cause damage in remaining Si
microstructures which have less than 1 /spl mu/m thickness controlled by the
anodiza...
#Silicon #Micromechanical devices #Electrochemical processes #Hydrogen #Ion implantation #Annealing #Fabrication #Microstructure #Temperature control #Thickness control