Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 127 for “"sensor array"”.
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Portable colorimetric sensor array technology
U of I Only Restriction Lifted for Item 89476 on 2017-09-30T09:15:24Z.
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Acoustic vector-sensor array processing
… and processing techniques for acoustic pressure-sensor arrays. Acoustic vector-sensor arrays, which measure particle velocity and pressure, offer significant potential but require fundamental changes to algorithms and performance assessment. This thesis develops new analysis and processing …
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Acoustic vector-sensor array performance
… measure pressure only, but acoustic vector-sensors also measure particle velocity. Velocity measurements can increase array gain and resolve ambiguities, but make vector-sensor arrays more difficult to analyze. This thesis derives a new set of useful performance measures for acoustic …
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Sensor Array Processing with Manifold Uncertainty
… realizable source locations for a given array configuration is referred to as the array manifold. In this thesis, array manifold ambiguities for linear arrays of omni-directional sensors in non-dispersive fields are considered. </p><p>First, the problem of underwater a hydrophone array …
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A Force Sensor Array for Space Applications
… been unsatisfied due to the inability of current sensor technology to resist environmental effects. In this work, capacitive sensors based on a porous polymer-ceramic composite structure were evaluated for potential use in future operations within robotic end-effectors, withstanding temperatures …
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A Colorimetric Sensor Array for Aqueous Analyses
… This thesis describes a simple colorimetric sensor array that probes a wide range of chemical properties. By printing hydrophobic dyes on a hydrophobic membrane, sensor arrays are easily prepared with substantial chemical selectivity for the identification and quantification of various …
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Robust vector sensor array processing and performance analysis
Acoustic vector sensors, which measure scalar pressure along with particle motion (a vector quantity), feature many advantages over omnidirectional hydrophone sensors. A sizable literature exists on the theory of processing signals for many vector sensor array applications. In practice, however, …
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Colorimetric Sensor Array: Do I See What You Smell
… technology in which colorimetric changes in an array of dyes constitute a signal much like that generated by the mammalian olfaction system; each dye is a cross-responsive sensor. This technology uses a disposable printed array of chemically responsive dyes as the primary sensor elements. The …
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Strain sensor array using printed single crystalline silicon on plastic substrate
… potential of wireless data transmission between sensor and data acquisition unit. In general, a metal strain gauge has high flexibility with low sensitivity, whereas the semiconductor strain gauge has high sensitivity with low flexibility. Devices using thin ribbons of single crystalline silicon …
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A flexible underwater pressure sensor array for artificial lateral line applications
… a flexible elastomer-based underwater pressure sensor array. When mounted onto the hull of an aquatic vehicle, the array enables obstacle detection, identification and tracking, and can help the vehicle reduce its hydrodynamic drag by providing information about the surrounding ow. This thesis …
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CMOS digital pixel sensor array with time domain analogue to digital conversion
This thesis presents a digital pixel sensor array, which is the first stage of an ongoing project to produce a CMOS image sensor with on-chip image processing. The analogue to digital conversion is performed at the pixel level, with the result stored in pixel memory. This architecture allows fast, …
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Application of Machine Learning Techniques for Real-time Classification of Sensor Array Data
… to identify approaches for classifying chemical sensor array data with high success rates that would enhance sensor detection capabilities. The present study attempts to fill this need by investigating six machine learning methods to classify a dataset collected using a chemical sensor array: …
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Colorimetric sensor array for identification of fungi & ultrasonic spray synthesis for supercapacitor materials
… within the two areas of (1) colorimetric sensor array for identification of fungi, and (2) ultrasonic spray synthesis for supercapacitor electrode materials. Human fungal infections have attracted intense current interest, especially in the light of recent outbreaks from pharmaceutical …
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Filter and bounding algorithm development for a helmet mounted micromechanical inertial sensor array
… displays (HMDs) and micromechanical inertial sensor arrays (MMISAs) have, until recently, occurred independently. This thesis details the development and simulation results of an inertial helmet-mounted head tracker for a T- 38 jet aircraft flight environment. Primary focuses are the state …
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Finite element simulation and parameter optimization of a flexible tactile pressure sensor array
… to optimize design of a flexible tactile sensor. The sensor consists of layers of thin-film copper and PDMS, and the model can be used to determine the effects on sensor sensitivity and durability of variations in material properties and geometry. The model was used to study the effect of …
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Structural Monitoring With Fiber Bragg Grating Strain Sensor Array and Optical Frequency Domain Reflectometry
… (C-OFDR) to interrogate Fiber Bragg Grating Arrays (FBGA) have shown promise in its use in infrastructure health monitoring systems. In this work, the modeling, design, simulation, fabrication, calibration, and testing of a three-element, 15.3 cm fiber Bragg grating strain sensor array with …
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Design of a Fiber Optic Sensor Array for in Vitro Monitoring of Cellular Processes
Current analysis of the life and death cycles of in vitro cellular systems is based on visual observation methods relying upon morphological changes monitored using a microscope. Data collected from these techniques are not as precise as scientists desire them to be. The methods are discontinuous, …
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Advanced Projection Ultrasound Imaging with CMOS-based Sensor Array: Development, Characterization, and Potential Medical Applications
… In this research, a newly invented ultrasound sensor array was incorporated into the developments of a projection imaging system. Three C-scan prototypes, which included prototypes #1, #2 and an ultrasound mammography system, were constructed. Systematic and Evaluative studies included …
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A Versatile Method of Resolution Enhancement for Tactile Sensor Array Used as Synthetic Skin: Modeling and Implementation
Tactile sensors are one of the major devices that enable robotic systems to interact with the surrounding environment. In particular, modern assistive robotic systems need to carry out many human-like activities. Thus, it is desired to have sensor arrays that can acquire different environmental …
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Micromachined, Out-of-Plane Micro Flow Sensors
… we use the fabrication platform to integrate 8 sensor array with on-chip signal conditioning using a commercial operational amplifier circuit. A new method to make the sensor array flexible is also proposed.
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