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 10 of 10 for “"probe calibration"”.
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Capacitor-Probe Calibration and Optimization for NDE Application to Portland Cement Concrete
… the dielectric constant of PCC using a capacitor probe (C-Probe) that has been recently developed at Virginia Tech and validate it for field application to detect internal PCC flaws such as delamination. The C-Probe consists of two flexible conducting plates, connected to a Network Analyzer, with …
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An Automated Ultrasound Calibration Framework Incorporating Elevation Beamwidth for Tracked Ultrasound Interventions
… 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 established prior to imaging. Inaccurate system calibration causes …
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On the Compensation of Medium Voltage Metrology via Alternative Methods
… in part from challenges associated with MV probe compensation and calibration. Some researchers have demonstrated improved performance by calibrating voltage probes at or near the rated voltage. However, this raises important safety concerns when the rated voltage of the probe is on the …
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Supersonic wind-tunnel : nozzle design and control system analysis
… tunnel side walls parallel. The five pitot probe calibration results, taken through the central vertical plane in the tunnel test-section, showed Mach number standard deviations about the mean of 0,638% and 1,004% for the analytical and semi-graphical design respectively. These results …
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Calibration of sonographic gel probe covers for in-vivo mechanical testing
… The device consists of an ultrasound probe, enclosed by a gel-filled cover. The mechanical properties of the covers vary with each cap as well as with time and temperature. Therefore, in order to ensure accurate measurement, the probe covers must be calibrated prior to use. An …
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Characterization and modeling of ESD events and near-field scanning calibration structures
… the course of two papers. The second topic, a calibration structure for near-field scanning probe calibration application, is discussed in the last paper. In the first paper, software-assisted detection methods are proposed for secondary ESD discharges. The measured waveforms are analyzed with …
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Characterizing and modeling methods for power converters
… of magnetic cores, two different probe calibration methods are demonstrated. Accurate phase discrepancy characterization is allowed with the proposed method, which overcomes the main limitation in the conventional two-winding method. In addition, the proposed method supports …
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A mach 1.95 free-jet facility for experimental investigation of injectant flow patterns
… of an existing hot-film concentration probe. The tests showed that oil flow visualization is a very effective technique in the free-jet facility, producing clear photographs that could be directly scaled. Nanoshadowgraph photography also produced clear photographs of the flow field, …
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Effects of ear-canal geometry and middle-ear pressure on wideband acoustic reflectance
… components: (1) design of a hearing measurement probe and probe tip, (2) extraction of the effects of the residual ear canal (REC) and estimation of the WAI at the tympanic membrane (TM), and (3) analysis of the TM-WAI to characterize middle-ear conditions. Major contributions of this thesis …
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Implementation of a Conrad Probe on a Boundary Layer Measurement System
This thesis presents the design, calibration, and performance evaluation of a type of two-hole pressure probe anemometer known as a Conrad probe, as well as its subsequent implementation on an autonomous, compact boundary layer measurement device and its first application for subsonic in-flight …