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...... hiện toàn bộ
#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 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...... hiện toàn bộ
#Kinetic theory #Plasmons #Resonance #Biosensors #Fractals #Endocrine system #Humans #Wildlife #Erbium #Regression analysis
Contribution of the gate insulator surface to work function measurements with a gas sensitive FET
Tập 1 - Trang 439-442 vol.1
Describes the effect of the guard ring for suppression of the baseline drift induced by humidity and the contribution of the gate insulator surface to the measurement of work function shifts induced by the adsorption of gas species.
#Gas insulation #FETs #Humidity #Hydrogen #Temperature sensors #Transducers #Surface resistance #Silicon #Electric potential #Intrusion detection
Frequency interference between two quartz crystal microbalances
Tập 2 - Trang 1148-1153 vol.2
In this paper, the frequency interference between two quartz crystal microbalances (QCMs) is investigated. Based on Mindlin's theory, the influence of design parameters on the frequency behavior of the QCM structure is studied.
#Frequency #Interference #Electrodes #Strips #Voltage #Crystalline materials #H infinity control #Equations #Vibrations #Elasticity
Just add sensor - integrating analog and digital signal conditioning in a programmable system on chip
Tập 1 - Trang 665-668 vol.1
Programmable mixed signal microcontrollers offer opportunities for the design of very low cost smart sensors.. A number of examples are shown which illustrate the performance and flexibility of the PSoC microcontroller in sensor applications.
#Sensor systems #Electrical resistance measurement #Pulse width modulation #Central Processing Unit #Intelligent sensors #Resistors #Communication system control #Clocks #Current measurement #Registers
Fiber optic sensing of tissue pH to assess low blood flow states
Tập 1 - Trang 266-269 vol.1
Tissue pH is a regional measure of anaerobic metabolism and low blood flow state that can be measured using near infrared (NIR) spectroscopy (700 - 1100 nm). NIR light passes through the skin to probe muscle and tissue at depths of 5 - 10 mm. We have used a fiber optic probe to collect light both through skin and directly from internal organs during surgical procedures, to investigate the measurem...... hiện toàn bộ
#Optical fibers #Blood flow #Fluid flow measurement #Skin #Probes #Optical saturation #Optical sensors #Biochemistry #Infrared spectra #Spectroscopy
A CMOS smart pixel for active 3D vision applications
Tập 1 - Trang 11-14 vol.1
Fast collection of three-dimensional (3D) data sets is required in a growing number of applications like robotic guidance, security and automotive. Scannerless time-of-flight (TOF) based active 3D vision systems are capable of collecting depth profiles of entire scenes in fractions of seconds but have the disadvantage of using high voltage and expensive electronic components. In this contribution ...... hiện toàn bộ
#Smart pixels #CMOS technology #Robots #Data security #Automotive engineering #Machine vision #Layout #Voltage #Electronic components #Testing
Effectively simultaneous temperature and strain measurement utilising a dual-grating sensor formed by type IA and type IIA FBGs
Tập 2 - Trang 1740-1745 vol.2
In this paper, we report a systematic investigation of the dependence of both temperature and strain sensitivities on the fiber Bragg grating (FBG) type, including the well-known Type I, Type IIA, and a now type which we have designated Type IA, using both hydrogen-free and hydrogenated B/Ge codoped fibers. We have identified distinct sensitivity characteristics for each grating type, and we have ...... hiện toàn bộ
#Temperature sensors #Temperature measurement #Strain measurement #Fiber gratings #Bragg gratings #Temperature dependence #Capacitive sensors #Optical fiber devices #Optical fiber sensors #Sensor phenomena and characterization
Simulation of characteristic of comb-gimbal micromachined gyroscope
Tập 2 - Trang 1095-1098 vol.2
A novel micromachined comb-gimbal gyroscope is presented, which is excited by electrostatic forces and its Coriolis acceleration induced torsional motion is read out capacitively. Since electrostatic comb driving and DRIE (deep reactive ion etching) technology are adopted, the large driving amplitude and higher sensitivity of the gyroscope can be achieved. Driving mode and sensing mode working in ...... hiện toàn bộ
#Gyroscopes #Frequency #Electrostatics #Analytical models #Circuit simulation #Acceleration #Etching #Optimization methods #Finite element methods #Equivalent circuits
Miniaturized linear magnetic position sensors for automotive applications
Tập 2 - Trang 1565-1570 vol.2
In this work, a linear position sensor with a Hall effect element for automotive applications is presented The work involves the design of device structure, finite element analysis (FEA) computer modeling of sensor performance, fabrication of sensor prototype, and prototype characterization. The significance of the work is that a low cost linear position sensor has been developed with high lineari...... hiện toàn bộ
#Magnetic sensors #Automotive applications #Sensor phenomena and characterization #Prototypes #Sensor systems #Hall effect #Finite element methods #Magnetic analysis #Performance analysis #Fabrication