SENSORS, 2002 IEEE
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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
A large area force sensor for smart skin applications
Tập 2 - Trang 1620-1624 vol.2
This paper presents the construction and theory of operation of a large area, flexible, tactile sensor and its applications. The sensing mechanism is based on the novel contact piezoresistive effect. Furthermore, the sensor's resolution, size and shape can be easily tailored to the applications' requirements. This versatility facilitates the use of the sensor in smart applications where tactile in......
#Force sensors #Skin #Rough surfaces #Surface roughness #Conductivity #Surface resistance #Piezoresistance #Switches #Contact resistance #Linearity
An adaptive fuzzy-logic procedure for ranking logical sensory performance
Tập 2 - Trang 1317-1322 vol.2
Multiple sensors are necessary for mobile robot operation in unknown environments. The multitude of sensors must be fused. For reliable fusion it is important to determine the performance of each sensor. A sensor ranking procedure based on an adaptive fuzzy logic algorithm for sensor fusion was developed. The procedure assumes unknown a-priori sensory performance and ranks the sensors according to......
#Sensor fusion #Fuzzy logic #Performance evaluation
Active structural error suppression in MEMS vibratory gyroscopes
Tập 2 - Trang 1089-1094 vol.2
Due to restrictive tolerancing, structural imperfections that reduce the performance of fabricated micro devices are typical. While feedback control is normally used to compensate for these imperfections, we show that this is insufficient for suppressing errors without interfering with device performance. The only alternatives are costly and time consuming post processing or the implementation of ......
#Micromechanical devices #Gyroscopes #Feedback control #Electrodes #Electrostatics #Aerospace engineering #Error correction #Force control #Actuators #Optical device fabrication
Investigation of stator coil and lead temperatures on high voltage inside large power generators via use of fiber Bragg gratings
Tập 2 - Trang 1603-1607 vol.2
This paper reports on the first realisation of embedding fiber Bragg grating temperature sensors inside the stator bars and onto the leads of a 200 MVA air cooled power generator. The worlds first measurements of the conductor temperature at high potential during a generator prototype test run demonstrates the feasibility and importance of this measuring technology.
#Stators #Voltage #Power generation #Temperature sensors #Induction generators #Fiber gratings #Bragg gratings #Nuclear power generation #Distributed power generation #Conductors
Detection and sizing of micro bubbles in streaming fluids with ultrasound
Tập 1 - Trang 528-531 vol.1
The detection of micro bubbles in fluids is of great practical interest in many medical and biotechnological applications, particularly with the extracorporeal circulation. A self calibrating system is presented which allows a continuous detection and determination of the micro bubble size distribution of tube flows in a range between 10 and 250 /spl mu/m in diameter. The measuring system is based......
#Ultrasonic imaging #Ultrasonic variables measurement #Size measurement #Application software #Computerized monitoring #Condition monitoring #Heart #Lungs #Research and development #Filters
Novel optical distance sensor based on MSM technology
Tập 1 - Trang 86-91 vol.1
This paper describes a novel distance-sensor concept based on photodiodes in metal-semiconductor-metal technology (MSM). MSM photodiodes can be operated as opto-electronic mixers (OEM) functioning similar to the so-called photonic mixing device (PMD). This paper employs the correlation techniques previously used with the PMD to the MSM. First experimental results obtained with the MSM inserted int......
#Optical sensors #Voltage #Photodiodes #Optical mixing #Optical modulation #Electrodes #Electrooptic devices #Optical devices #Distance measurement #Anodes
Plasma sprayed thick film anisotropic magnetoresistive (AMR) sensors
Tập 1 - Trang 656-659 vol.1
Reports recent work on thick film permalloy (NiFe) and NiCo alloy anisotropic magnetoresistive sensors made by thermal spray. Various sensor layouts have been fabricated and characterized. The AMR effect of 2.45% and 2.68% is obtained in as-sprayed permalloy and NiCo alloy sensors. Resistivity of thermal sprayed thick film is 40-60 /spl mu//spl Omega/-cm, which is higher than bulk material. A maxi......
#Anisotropic magnetoresistance #Thermal spraying #Thick films #Magnetic sensors #Thick film sensors #Sensor phenomena and characterization #Thermal sensors #Conductivity #Thermal resistance #Magnetic materials
Design and application of the field-bus-based intelligent robot plug and play sensing system
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In this paper, a novel design and application method of intelligent robot sensing system is presented in this paper. The multi-functional perceptual system consists of heterogeneous kinds of sensors, such as six-dimensional force/torque, tactile, vision, etc. Supported by the field-bus-based data acquisition and transmission technology, all the sensors work in an open connection environment, namel......
#Intelligent robots #Plugs #Intelligent sensors #Sensor systems #Design methodology #Tactile sensors #Force sensors #Torque #Data acquisition #Hardware
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