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
Characterization and modeling of Ge film thermometers for low temperature measurements
Tập 2 - Trang 1275-1280 vol.2
Cryogenic resistance thermometers composed of Ge films on GaAs substrates have been produced and characterized They are able to measure temperature over a wide range, from 0.03 K to 400 K. Behavior of these thermometers in magnetic fields and under gamma irradiation has been studied. The low-temperature conduction and magnetoresistance mechanisms of Ge-films used as a sensitive material for thermo......
#Temperature measurement #Magnetic films #Magnetic field measurement #Magnetic materials #Cryogenics #Thermal resistance #Gallium arsenide #Substrates #Electrical resistance measurement #Temperature distribution
Low drift air-gap CMOS-FET gas sensor
Tập 1 - Trang 421-425 vol.1
We developed a low drift CMOS GasFET for a wide variety of gases like H/sub 2/, NH/sub 3/ or NO/sub 2/ combining the advantages of previous CCFET and SGFET concepts. The design comprises an insulated floating electrode structure for hybrid-mounted sensitive gates. The transducer has a low long term drift and temperature coefficient, comparable to a MOSFET, as measurements under real conditions pro......
#Air gaps #Gas detectors #Electrodes #FETs #Temperature sensors #Capacitors #Insulation #Transducers #MOSFET circuits #Stability
One micron precision optically aligned method for hot-embossing and nanoimprinting
Tập 2 - Trang 931-935 vol.2
This paper reports an optically aligned hot-embossing and imprinting method for biomedical, microfluidic, and microoptical sensors. Hot-embossing technology is a low cost, flexible fabrication method, which has demonstrated high aspect ratio polymer microstructures as well as nanoimprinting patterns. It uses polymer substrates to imprint a pattern created on a master stamp. This allows the stamp t......
#Optical sensors #Biomedical optical imaging #Optical polymers #Production #Microfluidics #Biosensors #Costs #Optical device fabrication #Microstructure #Optical materials
Application of an extended Kalman filter to multiple low cost navigation sensors in wheeled mobile robots
Tập 2 - Trang 1660-1664 vol.2
The present aim of this research is to design a navigation sensor suite for a newly built mobile robot using low cost multiple sensors. This paper addresses the problem of generating navigational data for a wheeled mobile robot. An extended Kalman filter (EKF) is used to fuse data from multiple low cost sensors. In order to estimate the spatial position of a wheeled robot, a combination of acceler......
#Costs #Navigation #Mobile robots #Sensor systems #Fuses #Sensor fusion #Robot sensing systems #Accelerometers #Gyroscopes #Wheels
CMOS compatible optical filter for high-throughput enzymatic analysis devices
Tập 1 - Trang 225-228 vol.1
This paper relates to the use of a thin film of re-crystallized (polycrystalline) silicon as a narrow-band rejection filter in the ultraviolet light range and more particularly to the use of this layer as a protective mask for semiconductor photodiodes. The polycrystalline silicon filters were fabricated by laser annealing a thin film of amorphous silicon deposited by an LPCVD process. In order to......
#Optical filters #Silicon #Semiconductor films #Semiconductor thin films #Annealing #Glass #Narrowband #Protection #Photodiodes #Semiconductor lasers
Analogic fiber optic position sensor with nanometric resolution
Tập 2 - Trang 926-930 vol.2
This paper describes a miniature analogic position sensor. This sensor is dedicated to high resolution displacement measurement (10 nm) between two positions over a long range (a few millimeters). The working principle of the sensor is presented as well as experimental results.
#Optical fibers #Optical fiber sensors #Sensor phenomena and characterization #Optical sensors #Mirrors #Size measurement #Optical interferometry #Displacement measurement #Capacitive sensors #Position measurement
Visible optical sensing of ammonia based polyaniline film
Tập 1 - Trang 67-70 vol.1
Optical sensors have been used in new technologies for detecting small amounts of chemical, gaseous species. In this work, a new optical gas sensor using thin polymer layers was developed. We selected a polymer for the gas sensing material. Polymers were synthesized and chemically polymerized by using distilled aniline. The optical property of the polymer as a sensing material was analyzed by usin......
#Optical sensors #Optical films #Optical polymers #Chemical technology #Optical materials #Chemical sensors #Gas detectors #Force sensors #Glass #Light sources
Intelligent SOI CMOS integrated circuits and sensors for heterogeneous environments and applications
Tập 2 - Trang 1407-1412 vol.2
In this paper, we demonstrate how a simple fully-depleted SOI CMOS process can be adapted to provide a wide range of performance compatible with the realization of heterogeneous micropower, high-temperature or RF micro-systems which involve the integration of sensing, analog and digital components. High-temperature and low-voltage examples are discussed.
#Intelligent sensors #CMOS integrated circuits #CMOS process #MOSFETs #Radio frequency #Threshold voltage #CMOS technology #Silicon on insulator technology #Temperature sensors #Magnetic separation