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
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
Self-calibrated PTC air flow sensor
Tập 2 - Trang 1771-1774 vol.2
The paper presents a model-based approach to detect and compensate for errors of PTC sensors used for the measurement of air flows and air velocities in HVAC (Heating Ventilation and Air Conditioning) systems. Like for commonly used anemometers with mechanically moved parts, the main error sources during long-term operation are soiling by dust transported with the air and failures of electric comp......
#Calibration #Velocity measurement #Soil measurements #Fluid flow measurement #Aging #Electrical resistance measurement #Temperature sensors #Sensor systems #Thermal sensors #Heating
Simulation and design of the silicon drag-force-gas flowsensor based on piezoresistive effect
Tập 1 - Trang 627-632 vol.1
A silicon drag-force-gas flowsensor based on piezoresistive effect has been developed for IC technology applications. The sensor has been tested at gas flow from 20 to 500 l/h with temperature varying from 18-100/spl deg/C. The experimental pattern of a silicon gas flowsensor was designed, fabricated and tested. The theoretical analysis and simulation of a flowsensor chip in an airflow was carried......
#Silicon #Piezoresistance #Temperature sensors #Testing #Application specific integrated circuits #Gas detectors #Fluid flow #Analytical models #Finite element methods #Numerical analysis
Developments in family of integrated CMOS magnetic sensor/actuator for 2 phase brushless DC motor control
Tập 2 - Trang 818-822 vol.2
Melexis is a developer and manufacturer of microelectronic integrated systems. It has developed patented and highly integrated magnetic sensor actuators for the control of 2 phase brushless DC motors. This paper reviews the application parameters, historical implementations of control circuits and recent advances in applying CMOS SoC solutions. Application to rotary cooling fans is emphasized.
#Magnetic sensors #Actuators #Brushless DC motors #Electronics cooling #Hall effect #Fans #Manufacturing #CMOS logic circuits #Logic devices #Commutation
Humidity sensors using in-situ synthesized sodium polystyrenesulfonate/ZnO nanocomposites
Tập 1 - Trang 207-211 vol.1
Thin film humidity sensor has been prepared using in-situ synthesized inorganic/organic nanocomposites of sodium polystyrenesulfonate (NaPSS) and ZnO. Its humidity sensing characteristics and the sensing mechanism have been investigated by measuring the complex impedance spectra of the sensor at different humidities. The logarithm of the impedance of sensor based on composite film changes linearly......
#Humidity #Zinc oxide #Nanocomposites #Sensor phenomena and characterization #Electrodes #Material storage #Optical films #Optical polymers #Magnetic sensors #Thin film sensors
Development of a novel ultra-fast scintillator with MQW structure
Tập 1 - Trang 552-555 vol.1
We propose lead-halide-based perovskite-type organic/inorganic hybrid compounds, e.g. (CH/sub 3/NH/sub 3/)PbBr/sub 3/ and (C/sub 6/H/sub 13/NH/sub 3/)/sub 2/PbI/sub 4/ as a new kind of scintillator to use excitonic luminescence of semiconductor as the signal of radiation detection. Single crystals of the materials were bombarded by an electron pulse (1 to 2 ps) from a linear accelerator and the ti......
#Quantum well devices #Luminescence #Pulse measurements #Lead compounds #Signal detection #Radiation detectors #Crystals #Crystalline materials #Semiconductor materials #Electrons
Silicon pressure transducers with frequency output on base strain sensitive unijunction transistors
Tập 2 - Trang 998-1001 vol.2
Silicon pressure transducers with frequency output are simulated and designed The sensitive elements of the transducers are strain sensitive unijunction transistors. Two types of strain sensitive unijunction transistors are investigated: simple unijunction transistor (or double-base diode) and unijunction transistor with controlling p-n-junction. The transistors are classed as stress-sensitive sem......
#Silicon #Transducers #Frequency #Capacitive sensors #Anisotropic magnetoresistance #Physics #Semiconductor diodes #Magnetic anisotropy #Perpendicular magnetic anisotropy #Charge carrier processes
A plastic colorimetric resonant optical biosensor for multiparallel detection of label-free biochemical interactions
Tập 1 - Trang 212-216 vol.1
A high sensitivity plastic biosensor based on detection of changes in optical density on the surface of a narrow bandwidth guided mode resonant filter is demonstrated. Using sub-micron microreplication of a master sensor surface structure on continuous sheets of plastic film, the sensor can be produced inexpensively over large surface areas. In this work, the sensor structure is incorporated into ......
#Plastics #Resonance #Biomedical optical imaging #Biosensors #Optical filters #Optical films #Optical sensors #Proteins #Bandwidth #Surface structures