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
Đo độ cứng và biến dạng của các cấu trúc MEMS độc lập trên wafer Dịch bởi AI
Tập 2 - Trang 849-853 vol.2
Một phương pháp thử nghiệm nguyên bản được trình bày để đo độ cứng và đặc tính
biến dạng của các phần tử cơ học kích thước nhỏ độc lập trên các thiết bị MEMS
thực tế. Bộ thiết lập này cho phép, thông qua các tính toán cơ học phân tích và
phương pháp phần tử hữu hạn, việc trích xuất mô đun đàn hồi của các vật liệu sử
dụng trong các phần tử cơ học như vậy, do đó loại bỏ nhu cầu về các cấu trúc thử
n...
#Đo biến dạng #Thiết bị vi cơ học #Đo biến số cơ học #Đo kích thước #Thiết bị vi điện cơ học #Phương pháp phần tử hữu hạn #Vật liệu từ tính #Thử nghiệm vật liệu #Đo lực #Tính từ đàn hồi.
Dynamic link labels for energy efficient MAC headers in wireless sensor networks
Tập 2 - Trang 1520-1525 vol.2
Sensor data typically consists of packets with small payloads due to which the
MAC header is a significant and energy-expensive overhead. We present a scheme
that replaces conventional MAC addresses with dynamically assigned short link
labels that are spatially reused. This would be useful in self-configuring
sensor networks. We also present an encoded representation of these labels for
use in dat...
#Energy efficiency #Intelligent networks #Wireless sensor networks #Sensor phenomena and characterization #Distributed algorithms #Scalability #Batteries #Payloads #Routing #Telecommunication traffic
Smart adaptable strain gage conditioner
Tập 2 - Trang 1281-1284 vol.2
In this paper a smart adaptable strain gage conditioning system is presented.
The system is based on analog and digital processing to meet particularly
adaptability, flexibility and complex computations required in calibration and
compensation algorithms of strain gage thermal output. Analog processing, with
adequate amplification and filtering is used to adjust the strain gage and
temperature sig...
#Capacitive sensors #Temperature #Calibration #Computer architecture #Analog computers #Filtering #Signal processing #Springs #Hardware #Field programmable gate arrays
Determination of the sensitivity behaviour of an acoustic and thermal flow sensor by electronic characterisation
Tập 2 - Trang 1298-1303 vol.2
The Microflown is an acoustic and thermal flow sensor that measures the sound
particle velocity instead of sound pressure. For most applications the
Microflown should be calibrated, which is usually performed acoustically in a
standing-wave-tube. Here it is shown that the sensor's sensitivity and frequency
behaviour can be determined electronically as well, and an electronic method for
determinati...
#Thermal sensors #Acoustic sensors #Wires #Equations #Frequency #Acoustic devices #Sensor phenomena and characterization #Acoustic measurements #Temperature sensors #Temperature distribution
SnO/sub 2/ sensors with variable operating temperature for CO detection: selectivity enhancement
Tập 1 - Trang 361-365 vol.1
SnO/sub 2/ sensors are widely used for the detection of air contaminants such as
CO. Nevertheless, their application encounters many problems, first of all the
effect of interfering gases. The low selectivity is in fact a well-known problem
of these sensors. Moreover, the high operating temperature of metal oxide
sensors implies in general high power consumption. In this work we present a
study ai...
#Gas detectors #Temperature sensors #Ethanol #Sensor phenomena and characterization #Sensor arrays #Gases #Energy consumption #Measurement techniques #Temperature measurement #Pulse measurements
Relative humidity sensors based on porous polysilicon and porous silicon carbide
Tập 1 - Trang 499-502 vol.1
RH sensors have been made using porous polysilicon and porous SiC, both of which
can also be made porous by electrochemical anodisation in HF, similarly to
single crystal silicon. We show that polysilicon can be incorporated into a
humidity sensor enabling a reduction (compared to single-crystal porous Si) of
the effect of temperature on humidity measurements. We show that porous SiC can
also be i...
#Silicon carbide #Temperature sensors #Grain boundaries #Hafnium #Temperature measurement #Humidity measurement #Electrodes #Microstructure #Doping #Current distribution
Horizontal Hall effect sensor with high maximum absolute sensitivity
Tập 2 - Trang 785-790 vol.2
Sensitivity of conventional Hall sensors is strongly limited by the well known
short-circuit effect. Many researches were devoted to reduce offset and noise
but few works were carried out to improve sensitivity. Here, a new shape of
integrated horizontal Hall device is presented. This particular shape has been
developed to minimize the short-circuit effect of the sensor, allowing one to
shrink the...
#Hall effect devices #Current supplies #Voltage #Contact resistance #Shape #Strips #CMOS technology #Manufacturing processes #Electrons #Charge carrier density
The role of structural factor in In/sub 2/O/sub 3/ gas response
Tập 2 - Trang 1214-1218 vol.2
In this paper we examined the influence of In/sub 2/O/sub 3/ film structure on
their gas sensing characteristics. Films were deposited by spray pyrolysis from
InCl/sub 3/-water solutions. Regularities of a correlation between gas sensing
parameters and such structural parameters as film thickness, grain size,
refraction index, and texturing were established. Some requirements of the
In/sub 2/O/sub...
#Grain size #Spraying #Optical films #Atmospheric measurements #Crystallization #X-ray scattering #Structural engineering #Atmosphere #Temperature #Microelectronics