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
Thermomagnetic residual offset in integrated Hall plates
Tập 2 - Trang 763-766 vol.2
Integrated Hall plates show self-induced offset due to the current flow in its
current leads. The magnetic field surrounding the current leads causes a
magnetic offset signal, while their resistive heating causes thermoelectric
offset voltages. This paper reports experimental results on these two effects.
They are obtained using a novel test structure enabling one to separate the two
contributions...
#Current measurement #Thermoelectricity #Testing #Voltage measurement #Temperature #Magnetic field measurement #Thermoelectric devices #Magnetic fields #Resistors #Probes
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
First IEEE International Conference on Sensors - Sensors 2002 [front matter]
Tập 2 - Trang i-xiii - 2002
Conference proceedings front matter may contain various advertisements, welcome
messages, committee or program information, and other miscellaneous conference
information. This may in some cases also include the cover art, table of
contents, copyright statements, title-page or half title-pages, blank pages,
venue maps or other general information relating to the conference that was part
of the ori...
A class of micromachined gyroscopes with increased parametric space
Tập 2 - Trang 854-859 vol.2
This paper reports a design concept for MEMS gyroscopes based on increasing the
degrees-of-freedom of the oscillatory system by the use of two independently
oscillating interconnected proof masses. The 4-DOF dynamical system eliminates
the necessity for mode-matching due to its wide operation frequency range, and
reduces the damping sensitivity problem by operating away from resonance. Thus,
inher...
#Gyroscopes #Resonance #Micromechanical devices #Laboratories #Aerospace engineering #Fluctuations #Resonant frequency #Frequency response #Damping #Aerodynamics
Electro-magneto-mechanical sensors based on parametric oscillation circuits
Tập 2 - Trang 791-794 vol.2
Parameters in time-varying linear or non-linear circuits could be varied in such
a way as to induce an oscillation. Because this oscillation is due entirely to
the variation of the circuit parameters it is usually referred to as "parametric
oscillation". We explain the phenomenon of parametric oscillation and establish
the common basis for the configuration of several classes of sensors. In
partic...
#Circuits #Sensor phenomena and characterization #Magnetic sensors #Equations #Magnetic heads #Inductance #Frequency #Capacitors #Varactors #Inductors
Ultra-stabilization of temperature in APD sensors by means a HF switching regulator
Tập 1 - Trang 92-96 vol.1
APD-type photo sensors are widely used in several applications when a low level
of light must be measured such as in phosphorescence and fluorescence
measurements. In such applications, Avalanche Photo Diodes (APDs) must work in
the avalanche region in order to achieve high light-current gain. But the curve
is extremely sensitive and, so the gain changes with temperature. In this paper,
a new syst...
#Temperature sensors #Hafnium #Regulators #Diodes #Temperature measurement #Phosphorescence #Fluorescence #Electric variables measurement #Uncertainty #Thermal sensors
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