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
Biologically inspired auditory sensing system interfaces on a chip
Tập 1 - Trang 669-674 vol.1
Describes the current effort of creating cooperative analog/digital signal
processing (CADSP) systems towards auditory sensor and signal processing
applications. We address resolution issues that affect the choice of signal
processing algorithms arriving from an analog sensor. We discuss current analog
circuit approaches towards the front-end signal processing. We discuss our
current IC approaches...
#Signal processing algorithms #Biomedical signal processing #Digital signal processing chips #Biosensors #Integrated circuit noise #Sensor phenomena and characterization #Sensor systems and applications #Signal resolution #Analog circuits #Analog integrated circuits
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
Frequency interference between two quartz crystal microbalances
Tập 2 - Trang 1148-1153 vol.2
In this paper, the frequency interference between two quartz crystal
microbalances (QCMs) is investigated. Based on Mindlin's theory, the influence
of design parameters on the frequency behavior of the QCM structure is studied.
#Frequency #Interference #Electrodes #Strips #Voltage #Crystalline materials #H infinity control #Equations #Vibrations #Elasticity
Common design techniques for quartz rate sensors for both automotive and aerospace/defense market applications
Tập 2 - Trang 1597-1602 vol.2
In the early 1990s, Systron Donner Inertial Division (SDID), a subsidiary of BEI
Technologies, Inc., possessed a new solid-state rate gyroscope technology that
had not yet matured or captured a significant market share. Even though some
success had been achieved in defense missile applications, a strategy was
clearly needed to further develop the technology and lay the foundation for
future growth...
#Automotive engineering #Missiles #Gyroscopes #Application software #Aircraft #Stability #Control systems #Manufacturing #Production #USA Councils
ARROW-based optical accelerometers
Tập 2 - Trang 1075-1079 vol.2
Design, fabrication and characterization of silicon-based stress-free
self-aligned quad beam accelerometer is presented. Standard total internal
reflection waveguides have been replaced by ARROW structures, enhancing the
sensitivity to >4dB/g at the wavelength visible range (633nm) Moreover, as the
waveguide core has approximately the same size as the input fiber optic,
insertion losses have been ...
#Accelerometers #Optical waveguides #Optical sensors #Optical attenuators #Electromagnetic waveguides #Optical films #Optical losses #Optical refraction #Integrated optics #Silicon
Compensation of packaging asymmetry in a 2-D wind sensor
Tập 2 - Trang 1256-1259 vol.2
The influence of packaging on the behaviour of a 2-D thermal wind sensor has
been investigated. Non-ideal packaging increases the thermal asymmetry in the
sensor, which in turn distorts its output signal. Such distortion can be
compensated for by adjusting the heat distribution in the sensor. Using a
combination of CAD modeling techniques, expressions have been derived from which
the compensating ...
#Thermal sensors #Temperature sensors #Electronic packaging thermal management #Semiconductor device measurement #Temperature measurement #Ceramics #Distortion #Velocity measurement #Sensor phenomena and characterization #Aluminum
Fiber optics sensors for ultrasonic virtual biopsy
Tập 1 - Trang 261-265 vol.1
Recent progresses in optoacoustics let us foresee the possibility to realize a
strongly miniaturized transducer constituted by two optical fibers: a first
fiber, with a heavily absorbing film on its extremity, to generate broadband
ultrasounds; another fiber, with a Fabry-Perot cavity mounted, or deposed, on
its tip, to optically detect ultrasonic echoes. The proposed transducer is
characterized b...
#Optical fiber sensors #Biopsy #Ultrasonic transducers #Optical films #Optical fibers #Extremities #Ultrasonic imaging #Fabry-Perot #Biomedical optical imaging #Optical sensors