SENSORS, 2002 IEEE
Cơ quản chủ quản: N/A
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
Task-oriented self-organization of ad hoc sensor systems
Tập 2 - Trang 1485-1490 vol.2
An ad hoc network is a collection of perhaps wireless mobile nodes dynamically
forming a network without the use of any pre-existing network infrastructure or
centralized administration. Resource limitations of sensors deployed in an ad
hoc setting necessitates careful consideration of the choice of sensors. In this
paper, a distributed task-oriented self-organization algorithm for sensors in
such...
#Sensor systems #Sensor phenomena and characterization #Ad hoc networks #Wireless sensor networks #Nominations and elections #Mobile computing #Computer networks #Intelligent networks #USA Councils #Packet radio networks
Electronic interface modules for solid-state chemical sensors
Tập 1 - Trang 344-349 vol.1
Plug and play modules for interfacing three common types of solid-state chemical
sensors are presented The self-contained (integrated circuit) modules detect a
baseline signal from a sensor and auto-zero the signal to compensate for
baseline variations, both immediately after fabrication and periodically during
the lifetime of the sensor The signal compensation technique is based on the
governing ...
#Solid state circuits #Chemical sensors #Polymer films #Chemical analysis #Performance analysis #Sensor phenomena and characterization #Nonvolatile memory #Application specific integrated circuits #Plugs #Signal detection
Higher-order sensing using QCM sensor array and preconcentrator with variable temperature
Tập 1 - Trang 366-371 vol.1
Proposed the higher-order sensing method using preconcentrator with variable
temperature in combination with the QCM sensor array to extract features of the
samples. The rough separation among the compounds along the time axis enhanced
the discrimination capability of the sensor array system. The results of the
second-order sensing such as the images of the sensor responses and the loci on
PCA spa...
#Sensor arrays #Temperature sensors #Sensor phenomena and characterization #Data mining #Feature extraction #Sensor systems #Image sensors #Principal component analysis #Robustness #Humidity
The investigation of an integrated gas sensor array
Tập 1 - Trang 343 vol.1
A micro integrated gas sensor array has been designed and fabricated with
surface micro-machining technology. The sensor array consists of four elements
integrated on a chip. Two different kinds of SnO/sub 2/ film were sputtered on
the four sensors. Au and Pt were deposited on the surface of SnO/sub 2/ film as
catalysts. The four sensors can be independently controlled by separate heater
and tempe...
#Sensor arrays #Gas detectors #Temperature sensors #Artificial neural networks #Gases #Thermal sensors #Electronic noses #Urban pollution #Sensor phenomena and characterization #Microelectronics
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
A micro high-temperature superconductor-magnet flywheels with dual function of energy storage and attitude control
Tập 2 - Trang 757-762 vol.2
This paper proposes an energy storage and attitude control system for
micro-electromechanical systems (MEMS) in spacecraft using a high-temperature
superconductor (HTS) magnet bearing system. This system consists of an
HTS-magnet flywheel energy storage system and a brushless motor/generator. The
HTS flywheel, which permits high angular momentum storage since its drag torque
is nearly velocity-ind...
#High temperature superconductors #Flywheels #Energy storage #Space vehicles #Low earth orbit satellites #Superconducting magnets #Microelectromechanical systems #Micromechanical devices #Magnetic levitation #Superconducting magnetic energy storage
Satellite attitude acquisition using dual star sensors with a bootstrap filter
Tập 2 - Trang 1723-1727 vol.2
We propose a new attitude acquisition method based on the Bayesian bootstrap
filtering approach using dual star sensors. The proposed method estimates the
right ascension and the declination pointed by each star sensor in the reference
coordinate system using the measurement of the number of stars inside the FOV
(field of view). The system and the measurement models are highly nonlinear
functions ...
#Satellites #Filters #Bayesian methods #Sensor systems #Noise measurement #Position measurement #Image sensors #State estimation #Mathematical model #Coordinate measuring machines
Combined effect of the membrane flatness defect and real dimension gauges on the sensitivity of a silicon piezoresistive pressure sensor
Tập 2 - Trang 990-993 vol.2
Presents a new approach to the sensitivity loss of a silicon piezoresistive
pressure sensor. The loss origin is due to the parallelism defect of the two
sides of the membrane cumulated to the real dimensions of the gauges, considered
usually as being as points. The work we present deals with the modelling of a
structure, realised by micro-electronic techniques and chemical etching,
containing four...
#Biomembranes #Silicon #Piezoresistance #Piezoresistive devices #Voltage #Chemical sensors #Etching #Mechanical sensors #Bridge circuits #Temperature sensors