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The Measurement of Electric Current and Voltage
2018Textbooks on mechanics usually begin with the concepts of length, time, and mass. The measurement apparatus which has been tried and tested in everyday life is described, i.e. rulers, clocks and balances, and they are immediately put to use. No one uses a sundial or a water clock for the first experiments, or even a slave who is beating time.
Klaus Lüders, Robert Otto Pohl
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Novel Noncontact Eddy Current Measurement of Electrical Conductivity
IEEE Sensors Journal, 2018A new noncontact method for measuring the electrical conductivity of metals based on eddy current testing is proposed for the physics that the logarithm of phase signals of impedance change is linear to that of electrical conductivity. A finite element model for simulations was built, and the mathematical relationship between the logarithm of phase ...
Cuiping Wang +4 more
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Eddy currents: Contactless measurement of electrical resistivity
American Journal of Physics, 2000A simple and inexpensive student experiment is described, consisting of determination of the effective magnetic susceptibility of a cylindrical conductor in an axial ac magnetic field and contactless measurement of electrical resistivity. The experiment shows an important application of eddy currents.
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Surface Current Measurements with an Electric Probe
IEEE Transactions on Microwave Theory and Techniques, 1962The use of an electric probe for measurement of induced surface currents on obstacles in a parallel plate region is described. An analysis of the sources of error, and in particular the interaction of the probe with the obstacle, is examined theoretically and experimentally. It is concluded that the technique is capable of yielding measurements of good
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A device for measuring electric current
2018A device (1) for measuring electric current comprised of a plurality of magnetic field sensor elements (2, 2.1, 2.2,..., 2.n) positioned around a current carrying conductor, where each sensor element is sensitive to one vector component of the magnetic field generated by the electric current, where the sensor elements (2, 2.1, 2.2,..., 2.n) are ...
Rolf Disselnkötter +2 more
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Electrical Measurements on Circuits Requiring Current and Potential Transformers
Transactions of the American Institute of Electrical Engineers, 1909Modern requirements make it necessary to measure alternating current, volts, and watts on circuits where the magnitude of these quantities and the safety of the operator require that some means be provided so that the instruments used are not directly connected to the circuit.
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Applied Physics Letters, 1998
This letter describes a technique for measuring the ion current at a semiconductor wafer that is undergoing plasma processing. The technique relies on external measurements of the radio-frequency (rf) current and voltage at the wafer electrode. The rf signals are generated by the rf bias power which is normally applied to wafers during processing ...
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This letter describes a technique for measuring the ion current at a semiconductor wafer that is undergoing plasma processing. The technique relies on external measurements of the radio-frequency (rf) current and voltage at the wafer electrode. The rf signals are generated by the rf bias power which is normally applied to wafers during processing ...
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Time Resolved Electrical Measurements in High Current Discharges
Review of Scientific Instruments, 1966A method for measurement of the resistive component of the instantaneous voltage across a sample installed in a high voltage, high current circuit is described. Simultaneous measurement of the current permitted time resolved determination of electrical energy dissipation, power, and resistance of the sample.
E. C. Cassidy +2 more
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Molecular imaging in oncology: Current impact and future directions
Ca-A Cancer Journal for Clinicians, 2022Steven P Rowe, Martin G Pomper
exaly
Far distance measurement of electric current through infrared radiation
Measurement, 2022Chao Ren +4 more
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