Results 161 to 170 of about 17,983,398 (214)
Some of the next articles are maybe not open access.
Dispersion Errors in Time Domain Reflectometry
2021 13th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances (ISEMA), 2021Measurement of moisture content in a range of materials commonly uses time domain reflectometry and a transmission line surrounded by the material under test. The approach uses propagation time on the transmission line as a surrogate for permittivity and hence moisture content.
Ian Woodhead +4 more
openaire +1 more source
2018
Originally, the TDR measurement technique was developed to detect defects in telecommunication cables and electrical wires, Moffitt (1964). Within recent decades, TDR was also applied to determine and monitor volumetric moisture contents in particulate and porous media, in particular soil but lately also building materials such as building bricks ...
Alexander Michel +2 more
openaire +1 more source
Originally, the TDR measurement technique was developed to detect defects in telecommunication cables and electrical wires, Moffitt (1964). Within recent decades, TDR was also applied to determine and monitor volumetric moisture contents in particulate and porous media, in particular soil but lately also building materials such as building bricks ...
Alexander Michel +2 more
openaire +1 more source
Chaos correlation optical time domain reflectometry
Science China Information Sciences, 2010We propose a novel correlation optical time domain reflectometry (C-OTDR) of using broadband chaotic light. This reflectometry has the advantage over the conventional OTDR and the pseudorandom signal C-OTDR in range-independent spatial resolution. We employ a laser diode with feedback from a long fiber ring cavity as the source of chaotic probe light ...
Anbang Wang, Yuncai Wang
openaire +2 more sources
Interconnect characterization using time domain reflectometry
Proceedings of 1994 IEEE Electrical Performance of Electronic Packaging, 1995An approach is presented for macromodeling interconnect circuitry based on measured time domain reflectometry (TDR) data. In two example circuits which are macromodeled, delay, reflection, transmission, and crosstalk are accurately simulated as compared to measured data.
S.D. Corey, A.T. Yang
openaire +1 more source
Time Domain Reflectometry: A new measuring technique for research on superionic conductors
Radiation Effects and Defects in Solids, 1991We have used Time Domain Reflectometry, which appears to be a powerful and efficient technique, to study the ionic conductivity and permittivity of superionic conductors. The differences in the defect structure occurring for doping of SrF2 with different rare earth ions play an important role in the dielectric properties of these materials.
Ebens, W.O., den Hartog, H.W.
openaire +2 more sources
Optoelectronic time domain reflectometry
IEE Colloquium Microwave Measurements: Current Techniques and Trends, 1999Demonstrates optoelectronic time domain reflectometry using two optoelectronic pulse generator systems. The use of LT-GaAs and electro-optical sampling (EOS) provides significantly better time resolution than conventional techniques. Direct comparison of results using pulses with conventional techniques using steps is discussed.
openaire +1 more source
Time domain reflectometry measurement principles and applications
Hydrological Processes, 2002AbstractTime domain reflectometry (TDR) is a highly accurate and automatable method for determination of porous media water content and electrical conductivity. Water content is inferred from the dielectric permittivity of the medium, whereas electrical conductivity is inferred from TDR signal attenuation.
Jones, Scott B., Wraith, J. M., Or, D.
openaire +2 more sources
On the Feasibility of Pressure Profile Measurements With Time-Domain Reflectometry
IEEE Transactions on Instrumentation and Measurement, 2009Many applications in geotechnical engineering require knowledge of total pressure distributions. So far, only measurements at single points at individual locations of interest can be carried out with conventional geotechnical measurement devices. Time-domain reflectometry (TDR) has already been used to assess the amount of shearing at multiple distinct
Alexander Scheuermann, Christof Huebner
openaire +5 more sources
1988
The abbreviation TDR stands for the instrument (Time Domain Reflecto-meter) and the technique (Time Domain Reflectometry). The context in which the letters are used generally make it obvious which is meant.
openaire +1 more source
The abbreviation TDR stands for the instrument (Time Domain Reflecto-meter) and the technique (Time Domain Reflectometry). The context in which the letters are used generally make it obvious which is meant.
openaire +1 more source
Time-domain slicing optical frequency domain reflectometry
Optics LettersA time-domain slicing (TDS) optical frequency domain reflectometry is proposed for large strain sensing with better spatial resolution. Compared with the conventional frequency domain slicing (FDS) method, the TDS with a Burg spectrum estimation is capable of enhancing the similarity of a local spectrum under large strain and mostly suppressing the ...
Qing, Bai +6 more
openaire +2 more sources