SENSORS, 2002 IEEE

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Dual-use signal processing for a multiple-sensor system: sonar and optical image processing for underwater obstacle avoidance
SENSORS, 2002 IEEE - Tập 2 - Trang 1364-1367 vol.2
T.M. Massengill, D.M. Wilson
A novel method for streamlining two different signals from sonar and optical sensors into a single signal processing flow to implement an obstacle avoidance algorithm is presented. The processing architecture consists of a custom fabricated analog smoothing array and a microcontroller The combination of these two elements reduces power requirements well below that of a DSP performing a similar alg...... hiện toàn bộ
#Optical signal processing #Sonar #Image processing #Signal processing algorithms #Signal processing #Optical sensors #Microcontrollers #Streaming media #Array signal processing #Image motion analysis
Novel QCM biosensing based on analyte-specific precipitation reactions
SENSORS, 2002 IEEE - Tập 1 - Trang 537-540 vol.1
S.M. Reddy, N.G. Karousos
We describe a novel method for the determination of paracetamol, in solution, using a method of analyte-specific precipitation. Surface adsorption is detected using the quartz crystal microbalance (QCM) sensor. The method is based on the enzymatic hydrolysis of paracetamol using arylacylamidase (AAA) to give 4-aminophenol (4-AP). The 4-AP specifically reacts with excess of a given phenol (for exam...... hiện toàn bộ
#Biosensors #Drugs #Biochemistry #Laboratories #Optical films #Optical resonators #Surface impedance #Temperature sensors #Chemicals #Hospitals
A high sensitive Fabry-Perot shear stress sensor employing flexible membrane and double SU-8 structures
SENSORS, 2002 IEEE - Tập 2 - Trang 969-972 vol.2
Fan-Gang Tseng, Chun-Jun Lin
This paper reports a novel shear stress sensor utilizing flexible membrane and double SU-8 resist structures as a Fabry-Perot interferometer. Through UV lithography on thick resist, the surface roughness of the reflection surface was better than 7 nm (Ra value trough 10*10 /spl mu/m/sup 2/ area), suitable for optical application. A single mode optical fiber was employed for detecting the displacem...... hiện toàn bộ
#Stress #Biomembranes #Resists #Rough surfaces #Surface roughness #Fabry-Perot interferometers #Lithography #Optical reflection #Optical interferometry #Optical sensors
Fabrication and characterization of flexible silicon substrates with electroplated gold leads
SENSORS, 2002 IEEE - Tập 1 - Trang 568-571 vol.1
T.H. Lisby, O. Hansen, J.A. Branebjerg
A study was undertaken to fabricate flexible silicon substrates for high-density packaging. Two different fabrication methods were evaluated to obtain the best mechanical strength. To protect the structures from KOH etching an electroplated layer of nickel was used as protective layer. Structures are fabricated with electroplated gold leads to ensure low resistance.
#Fabrication #Silicon #Gold #Stress #Probability #Etching #Protection #Acoustic beams #Materials testing #Force measurement
ChemFET arrays for chemical sensing microsystems
SENSORS, 2002 IEEE - Tập 1 - Trang 732-735 vol.1
B.J. Polk
Chemically sensitive field-effect transistors (ChemFETs), among the smallest chemical sensors available to-date, are attractive for use in integrated systems. Favorable attributes of the ChemFET array include inherent compatibility with microfabricated electronics, small size of only 400 /spl mu/m by 500 /spl mu/m, low noise, and simple support circuitry. ChemFET structure is similar to other insu...... hiện toàn bộ
#Sensor arrays #Chemical sensors #Conducting materials #FETs #Semiconductor materials #Chemical analysis #Semiconductor device noise #Circuits #Plastic insulation #Semiconductivity
Electronic interface modules for solid-state chemical sensors
SENSORS, 2002 IEEE - Tập 1 - Trang 344-349 vol.1
S. McKennoch, D.M. Wilson
Plug and play modules for interfacing three common types of solid-state chemical sensors are presented The self-contained (integrated circuit) modules detect a baseline signal from a sensor and auto-zero the signal to compensate for baseline variations, both immediately after fabrication and periodically during the lifetime of the sensor The signal compensation technique is based on the governing ...... hiện toàn bộ
#Solid state circuits #Chemical sensors #Polymer films #Chemical analysis #Performance analysis #Sensor phenomena and characterization #Nonvolatile memory #Application specific integrated circuits #Plugs #Signal detection
Identification of organic solvents by a virtual multisensor system with hierarchical classification
SENSORS, 2002 IEEE - Tập 1 - Trang 382-387 vol.1
A. Schutze, A. Gramm, T. Ruhl
To improve the selectivity of semiconductor gas sensors temperature modulation is often used We present a study showing the potential of this technique with information gained comparable to multisensor systems. A dynamic operating mode coupled with a low complexity evaluation strategy allows identification of six organic solvent vapors over a wide concentration range (2 - 200 ppm) with a single se...... hiện toàn bộ
#Solvents #Multisensor systems #Temperature sensors #Sensor systems #Leak detection #Sensor arrays #Temperature control #Electrical resistance measurement #Temperature measurement #Gas detectors
Integrated optical sensors for 3-D vision
SENSORS, 2002 IEEE - Tập 1 - Trang 1-4 vol.1
A. Simoni, L. Gonzo, M. Gottardi
3-D vision systems are slowly entering the off the-shelf market due to their manifold potential applications. Market driven applications like reverse engineering, surveillance and automotive are pushing towards high volume production but require low system costs. Using recent advances in microelectronic and opto-electronic technologies and integrating when possible many processing functions at sen...... hiện toàn bộ
#Optical sensors #Machine vision #Manifolds #Reverse engineering #Surveillance #Automotive engineering #Production systems #Costs #Microelectronics #Volume measurement
Non-idealities of temperature sensors using substrate pnp transistors
SENSORS, 2002 IEEE - Tập 2 - Trang 1018-1023 vol.2
M.A.P. Pertijs, G.C.M. Meijer, J.H. Huijsing
This paper describes the nonidealities of temperature sensors based on substrate pnp transistors and shows how their influence can be minimized The effects of series resistance, current-gain variation, high-level injection and the Early effect on the accuracy of the PTAT voltage are discussed. The results of measurements made on substrate pnp transistors in a standard 0.5 /spl mu/m CMOS process ar...... hiện toàn bộ
#Temperature sensors #Voltage #Temperature measurement #Bipolar transistors #Temperature distribution #CMOS technology #Measurement standards #CMOS process #Data mining #Semiconductor device measurement
Analogic fiber optic position sensor with nanometric resolution
SENSORS, 2002 IEEE - Tập 2 - Trang 926-930 vol.2
F. Lamarque, C. Prelle
This paper describes a miniature analogic position sensor. This sensor is dedicated to high resolution displacement measurement (10 nm) between two positions over a long range (a few millimeters). The working principle of the sensor is presented as well as experimental results.
#Optical fibers #Optical fiber sensors #Sensor phenomena and characterization #Optical sensors #Mirrors #Size measurement #Optical interferometry #Displacement measurement #Capacitive sensors #Position measurement
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