SENSORS, 2002 IEEE
Cơ quản chủ quản: N/A
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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
Phát triển cảm biến vi từ trường dạng lưới phẳng mới cho việc kiểm tra chất lượng vật liệu mạ điện Dịch bởi AI
Tập 2 - Trang 741-746 vol.2
Bài báo này đã báo cáo về công việc phát triển một cảm biến vi từ trường dạng
lưới phẳng mới nhằm kiểm tra chất lượng của các vật liệu mạ điện. Cảm biến này
phù hợp với việc kiểm tra chất lượng của các vật liệu mạ điện. Kết quả thu được
từ mô hình phân tích về việc tính toán điện trở chuyển tiếp của cảm biến đã được
thảo luận. Điện trở chuyển tiếp được sử dụng để kiểm tra chất lượng vật liệu mạ
đi...
#Kiểm tra #Tính chất vật liệu #Điện trở bề mặt #Vi từ tính #Đo điện trở #Cuộn dây #Cảm biến từ #Vật liệu dẫn điện #Mô hình phân tích #Độ dẫn điện
A kinetic study of analyte-receptor binding and dissociation for surface plasmon resonance biosensor applications
Tập 1 - Trang 282-287 vol.1
A fractal analysis which takes into account the effect of surface heterogeneity
brought about by ligand immobilization on the reaction kinetics is presented.
The binding and dissociation of estrogen receptors ER/spl alpha/ and ER/spl
beta/ to different ligands is analyzed within the fractal framework. The
heterogeneity on the biosensor surface is made quantitative by using a single
number, the fra...
#Kinetic theory #Plasmons #Resonance #Biosensors #Fractals #Endocrine system #Humans #Wildlife #Erbium #Regression analysis
Low-cost magnetic torque sensor principle
Tập 2 - Trang 901-904 vol.2
The torque is measured in a contactless technique without special treatment of
the shaft, using the magneto-elastic effect of ferromagnetic materials. Strain
or stress due to moments lead to a change of magnetic properties of the material
(hysteresis deformation, permeability changes). Magnetoelastic sensors are
distinguished by robustness and good reproducibility. However, inhomogeneities
of the ...
#Magnetic sensors #Magnetic materials #Saturation magnetization #Shafts #Magnetic hysteresis #Stress #Torque measurement #Magnetic field induced strain #Magnetic properties #Permeability
Study of gas sensor based on adsorption heat measurement using Y-cut quartz crystal microbalance
Tập 1 - Trang 435-438 vol.1
In this paper, we describe the gas sensor using Y-cut quartz resonator. The
sensor response property is decided not only by the mass loading effect, but
also the heat of adsorption caused when the gas molecule is adsorbed. This type
of sensor has a response characteristic different from the conventional sensors
using AT-cut resonator that is stable against temperature change around room
temperatur...
#Gas detectors #Temperature sensors #Sensor phenomena and characterization #Acoustic sensors #Thermal sensors #Thin film sensors #Sensor systems #Temperature measurement #Absorption #Acoustic waves
An incremental capacitive sensor for harsh environment
Tập 2 - Trang 841-842 vol.2
This paper presents a new approach for the design of incremental angular
position and angular speed sensors, using a capacitive technology. Transmitter
and receiver segments are integrated with the sensor electronics on a single
PCB. As the sensor measures the change of capacitance in dependence of the rotor
position, any conductive or dielectric material can be used for the gear-tooth
rotor. The ...
#Capacitive sensors #Optical transmitters #Magnetic sensors #Electromagnetic compatibility #Optical sensors #Magnetic materials #Position measurement #Dielectrics #Frequency #Velocity measurement
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
Single crystal silicon MEMS fabrication technology using proton-implantation smart-cut technique
Tập 1 - Trang 585-588 vol.1
A novel single crystal silicon MEMS fabrication process is proposed using
proton-implantation smart-cut technique. Compared to conventional SOI wafer
fabrication processes for MEMS applications, this technology can potentially
result in a significant substrate and processing cost reduction. A single
crystal silicon layer with 1.78 /spl mu/m thickness has been achieved using the
proposed technique....
#Silicon #Micromechanical devices #Fabrication #Substrates #Costs #Wafer bonding #Prototypes #Protons #Crystalline materials #Structural beams