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 25 for “"calibration system"”.
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The Virginia Tech Calibration System
… unit (PMU) applications on power grid monitoring systems have been implemented since the early ninety's. Large monitoring system network performance relies on the consistent measurements of PMUs across the system. This has become a major challenge for designers since large networks use PMUs from …
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The UV laser calibration system for the L3 magnetic spectrometer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1986.
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DEVELOPMENT OF ENHANCED CALIBRATION SYSTEM AND MEASUREMENT PROGRAM FOR RADIOSTEREOMETRIC ANALYSIS
… improve its measurement efficiency. An enhanced calibration cage for RSA was developed by using numerical and image simulations. The phantom study showed that the novel cage has significant improvement of accuracy and precision over two widely used cages. By implementing and modifying existing …
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Calibration system for the Tracking Accuracy Measurement System (TAMS) using differential GPS (dGPS)
… of a combined Optronics and Radar Tracker system is investigated in this dissertation. The Tracking Accuracy Measurement (TAMS) was designed to exploit the positional accuracy of differential Global Positioning System (dGPS) technology to qualify a 60km range X-band combined Optronic and …
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Architecture and design of an RF receiver front-end and transmitter for wireless sensor networks, healthcare and smart energy systems
… are part of the foundations of a commercial RF system on a chip. The use of a number of digitally-assisted analog and RF techniques enables a fully integrated, low energy, low cost and high performance RF transmitter and receiver. The thesis addresses four key challenges in low energy RF …
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The Daya Bay Reactor Neutrino Experiment
… Bay Experiment, including antineutrino detector, calibration system, muon veto system and muon tagging system. Chapter 3 shows the design, development, construction, and assembly of Muon Pool PMT calibration system, and presents an algorithm of calculating the muon pool PMT timing offset values. …
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Measurement and validation of rainstorm parameters with the VPI radar
… from published plots. The special hardware and calibration techniques required for this experiment are also described. An IBM-PC controlled antenna pointing system and a system to continuously monitor both the peak and average power of the radar transmitter are included. Also included is a …
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Analytical camera pose estimation and inverse modelling of high order radial lens distortion polynomials for close range photogrammetry
Camera calibration aims at estimating intrinsic and extrinsic camera parameters that accurately describe the projection of points from the 3D scene to the 2D image sensor. The absence of numerical estimates of parameters describing the camera internal and external geometry can prevent absolute …
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Doppler ultrasound technique used to determine the blood flow viscosity in the middle cerebral artery of a canine animal model
… and used for the application. An in vitro calibration system was designed and machined for the purpose of testing and calibrating every transducer before using it in vivo. Preliminary tests included experiments on the in vitro system and measurement of blood flow velocity in the human wrist …
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Practical color-based motion capture
Motion capture systems track the 3-D pose of the human body and are widely used for high quality content creation, gestural user input and virtual reality. However, these systems are rarely deployed in consumer applications due to their price and complexity. In this thesis, we propose a motion …
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Lower Hybrid Current Drive on Alcator C-Mod : measurements with an upgraded MSE diagnostic and comparisons to simulation
… Tokamak previously experienced unacceptable calibration drift and sensitivity to partially-polarized background light that limited its ability to measure magnetic field pitch-angles. A comprehensive analytic study of the origin of polarization angle errors in MSE diagnostics and an …
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Latency and Distortion compensation in Augmented Environments using Electromagnetic trackers
Augmented reality (AR) systems are often used to superimpose virtual objects or information on a scene to improve situational awareness. Delays in the display system or inaccurate registration of objects destroy the sense of immersion a user experiences when using AR systems. AC electromagnetic …
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Calibration of the COHERENT Neutrino Flux Normalization Detector
… physics experiments. Establishing the detector's calibration is essential to its operational phase. A dedicated calibration system, described in detail in this work, has been developed, utilizing encapsulated LED flashers controlled by a microcontroller unit to ensure the systematic and reliable …
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Development of a video-based slurry sensor for on-line ash analysis
… provides a low cost, reliable ash-monitoring system suitable for use as a process control sensor. The video-based slurry sensor is mounted in a small sump which is continuously fed with coal tailings. The slurry presentation system uses a pressurized tube to rapidly acquire samples of tailings …
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Digitally-Assisted RF IC Design Techniques for Reliable Performance
… RF circuit design techniques: self-calibration system for RF phase shifters and wide dynamic range LNAs.</p> <p>Due to PVT variations in scaled technologies, RF phase shifter design becomes more challenging with device scaling. In the proposed self-calibration topology, we devised a …
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Machine tool accuracy characterization, error modeling and compensation using telescopic ballbar and laser interferometer
… using a low powered He-Ne laser (Renishaw®) calibration system along with environmental controller unit. The machine investigated is Cincinnati Milacron Sabre 750 3-axes CNC Vertical Machining Center with Acramatic 2100 CNC open architecture controller. Results shows that drive motors of the …
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An Automated Ultrasound Calibration Framework Incorporating Elevation Beamwidth for Tracked Ultrasound Interventions
… The intrinsic accuracy of a tracked US system is primarily determined by a unique procedure called ``probe calibration", where a spatial registration between the coordinate systems of the transducer (provided by a tracking device affixed to the probe) and the US image plane must be …
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Design, Fabrication and Calibration of Compliant, Multi-Axis, Fiber-Optic Force/Torque Sensors for Biomechanical Measurements
… on fiber-optic sensing technology, the novel calibration methodologies and the experimental results. A compliant 3-axis, intensity modulated-based, fiber-optic force sensor that simultaneously measures normal and shear forces was designed, prototyped and successfully calibrated. A nonlinear …
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Design and application of an automated system for camera photogrammetric calibration
… of a novel Automatic Photogrammetric Camera Calibration System (APCCS) that is capable of calibrating cameras, regardless of their Field of View (FOV), resolution and sensitivity spectrum. Such calibrated cameras can, despite lens distortion, accurately determine vectors in a desired …
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Novel Advances in Bioprinting Based on the Mechanical Design and Optimization of Open-source Systems
… a comparison framework between bioprinters. The calibration models utilized also permitted to identify which are the most important factors affecting printing accuracy. In this line, an automatic and non-expensive calibration system was also proposed, which can be utilized in bioprinters with …
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