3 edition of Ultrasonic velocity measurement using phase-slope and cross-correlation methods found in the catalog.
Ultrasonic velocity measurement using phase-slope and cross-correlation methods
|Other titles||Ultrasonic velocity measurement using phase slope and cross correlation methods|
|Statement||David R. Hull, Harold E. Kautz, and Alex Vary|
|Series||NASA technical memorandum -- 83794|
|Contributions||United States. National Aeronautics and Space Administration|
|The Physical Object|
Therefore, a change in phase center between a sum beam and a half beam may be determined. According to one exemplary embodiment, a third return vector from the target from first portion of the antenna may be received. The purified H2 gas is then stored in a metal hydride container and a fuel system is used for power generation using the hydrogen gas. Jing, Y.
The cross-correlation algorithm is especially advantageouswhen ultrasonic signals are distorted or have low signal-to-noise ratios as in porous ceramics or composites as illustratedin Fig. The three pulse lengths may be 25 microseconds long, according to one exemplary embodiment. Kapayeva, M. Nagel, J. Li, B. According to yet other exemplary embodiments, the aperture may be separated in various ways other than a top half and a bottom half or a left half and a right half, and the aperture may be separated unevenly e.
Hull, D. Huang, et al, The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis, Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, vol. In: Walzen von Flachprodukten eds. Furthermore, XRD results revealed that the phase of asphalt cement changed from amorphous to semi-crystalline with the addition of ASA, which indicates that this material has good workability with asphalt cement.
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The signal spectrum is estimated by dierencing the cross spectrum of the current window and the cross spectrum of noise. Birks, R. Radar can cause transmitter frequency changes to produce radar return samples that are relatively independent. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.
Fukunaga, M. Current edition approved Aug. In: Walzen von Flachprodukten eds. Lee, and J. This paper builds upon the instrumentation chapter of the recently published FHR technology development roadmap. Clamp-on ultrasonic flow measurement, that includes high-temperature tolerant standoffs, is a potential coolant flow measurement technique.
Bailey, R. X-ray diffraction provides the most successful approach, but suffers from the limitation that only a very near surface layer is sensed.
Consequently, FHRs can employ standoff optical measurements from above the salt pool to assess in-vessel conditions. In typical monopulse systems, averaging is done incoherently, with the multiple angle arguments of a vector that represents target phrase being averaged.
This knowledge should help guide and inform manufacturers making critical decisions surrounding design criteria of future turbines to be deployed in the coastal zone. Honarvar, H. The resulting effect of zero waste will enable both an increase in the revenue for the industry, as well as securing a brighter and greener future for the environment.
Successive windows are overlapped by an adjustable amount so that the location of a given source can be based on the centroid of the solutions from a number of windows. It still attracting people until today through its unique identity.
Also, the salt redox condition will be monitored as an indicator of its corrosiveness. Figure 1. Kautz, and A. Current edition approved Feb. The counterpart disc was made of M2 tool steel.
Used with Test Method B orTest Method C, this practice can be used to establishvelocity reference standards for fully dense and porous solidsand thereby for indirect measurement of densities.
Chimenti, Eds. According to an exemplary embodiment, the system may provide angle estimates with standard deviations less than the beamwidth divided by fifty instead of the beamwidth divided by ten for monopulse systems. Precision and Bias9.
According to such an embodiment, the received phase center is effectively moved.Request PDF | Measuring uncertainty of ultrasonic longitudinal phase velocity estimation using different time-delay estimation methods based on cross-correlation: Computational simulation and.
Ultrasonic velocity measurement using phase-slope and cross-correlation methodsmicroform / David R. Hull, Harold E.
Kautz, and Alex Vary. Also Titled. Ultrasonic velocity measurement using phase slope and cross correlation methods Author. Hull, David R. Other Authors. United States. National Aeronautics and Space Administration.
Project Mercury. Jul 01, · Wavelet-based group and phase velocity measurements: Method. NASA Astrophysics Data System (ADS) Yang, H. Y.; Wang, W. W.; Hung, S. H. Measurements of. Full text of "Oscillations, Waves, and Interactions" See other formats. USB1 - System for and method of sequential lobing using less than full aperture antenna techniques - Google Patents System for and method of sequential lobing using less than full aperture antenna techniques Additionally, a constant phase slope as illustrated in graphsof FIGS.
may be used to monitor sylvaindez.com by: Ultrasonic convergence measurements [microform] / by James R. McVey U.S. Dept.
of the Interior, Bureau of Mines Pgh. [i.e. Pittsburgh], PA [i.e. Pittsburgh], PA Australian/Harvard Citation.