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
Current sensor in PCB technology
Tập 2 - Trang 779-784 vol.2
A novel DC/AC current sensor works on the fluxgate principle. The core in the form of a 7/10 mm ring made of electrodeposited Permalloy is sandwiched into the middle of the printed circuit board (PCB), while the sensor excitation winding is also integrated in the copper layers of the PCB. In order to lower the sensor power consumption, the excitation winding was tuned by a parallel capacitor. The ......
#Sensor phenomena and characterization #Integrated circuit technology #Printed circuits #Copper #Capacitive sensors #Energy consumption #Capacitors #Frequency #Linearity #Hysteresis
Magnetic angular encoder using an automatic offset compensation technique
Tập 2 - Trang 767-770 vol.2
Quality and resolution of integrated microsystems using Hall sensors dedicated to an angular encoder are strongly dependent on the accuracy of relative position of Hall sensors and on the offset of electronic frontend circuitry. In this paper, we describe a CMOS microsystem built on two integrated circuits. This contactless encoder microsystem gives three sine and square signals with a phase shift......
#Magnetic sensors #Voltage #Permanent magnets #Calibration #CMOS integrated circuits #Feedback #Assembly #Engines #Permanent magnet motors #Micromotors
ASIC design for a phase sensitive signal conditioning unit for porous silicon based sensors
Tập 1 - Trang 146-150 vol.1
Porous Silicon (PS) based sensors are compatible to Si IC processing and can be integrated on the same chip with its signal processing unit. PS can be modeled as a distributive RC network and the dielectric constant of the porous layer changes under external stimuli like ambient humidity, pressure etc. Thus a phase sensitive signal conditioning unit that can be integrated with the transducer on th......
#Application specific integrated circuits #Signal design #Silicon #Transducers #Humidity #Phase detection #SPICE #Signal processing #Dielectric constant #Signal detection
A high dynamic magnetooptic current transformer with optimized signal processing
Tập 2 - Trang 1354-1359 vol.2
In the power industry current has to be measured for metering and protection purposes. Conventional sensor setups need two transformers to realize the high dynamic range. By a new mixed analog/digital signal processing algorithm, the performances of a high accuracy revenue metering and a fast, high dynamic protection metering magnetooptic current sensor were combined into one single unit. The syst......
#Current transformers #Signal processing #Signal processing algorithms #Power system protection #Magnetic sensors #Dynamic range #Power industry #Current measurement #Power measurement #Digital signal processing
Wireless liquid level sensing for restaurant applications
Tập 1 - Trang 715-720 vol.1
Since restaurants often make much of their profits on drinks, it is critical for servers to offer refills in a timely fashion. We propose wireless liquid level sensing glassware to aid in this task. Specially instrumented glassware detects fluid levels via a high-resolution capacitance measurement. A coil embedded in the table inductively couples power to the glasses, and provides a path for data ......
#Wireless sensor networks #Glass #Electrodes #Instruments #Batteries #Ice #Contacts #Capacitance measurement #Coils #Prototypes
Acoustic plate mode tissue sensor
Tập 1 - Trang 278-281 vol.1
This paper reports a novel application of acoustic plate mode (APM) sensor to monitor processes of tissue regeneration. The sensor was tested at four different environments, including air, alcohol, DI water, and glycerol. Calibration of the sensor under solution with different densities has also been carried out, and demonstrated a density sensitivity of 29.36 degree/g/cm/sup 3/. In the applicatio......
#Acoustic sensors #Biosensors #Underwater acoustics #Acoustic applications #Monitoring #Acoustic testing #Calibration #Fibroblasts #Mice #Embryo
Testing and simulation of comb-driven MEMS relay by applying digital image correlation technology
Tập 2 - Trang 1204-1207 vol.2
In this paper, digital image correlation (DIC) technology is developed to measure the in-plane deformation of the MEMS relay by using an optical microscope with a CCD camera. The mechanical-electronic behavior of a bulk-micromachined relay driven by a comb actuator for lateral motion is tested and simulated. Due to the small size, the deformation measurement of the MEMS relay is very difficult in ......
#Testing #Micromechanical devices #Digital relays #Digital images #Optical microscopy #Optical films #Charge coupled devices #Digital cameras #Charge-coupled image sensors #Actuators
Super low temperature sintering of semiconducting BaTiO/sub 3/ based PTCR ceramics
Tập 2 - Trang 1223-1226 vol.2
Super low temperature sintering with liquid phase of semiconducting BaTiO/sub 3/ PTCR ceramics was discussed Samples were sintered at various temperatures from 800/spl sim/1300 /spl deg/C /spl times/ 0.5/spl sim/2hr with varied sintering aids. Experiment shows the La-doped BaTiO/sub 3/ with sintering aid BN can be sintered as low as temperature of 1000 /spl deg/C /spl times/ 0.5/spl sim/2hr. Sinte......
#Semiconductivity #Ceramics #Chemistry #Temperature sensors #Physics #Costs #Barium #Powders #Cooling #Electrons