Proceedings ArticleDOI
Feasibility study of a non-contact AC voltage measurement system
P. S. Shenil,R. Arjun,Boby George +2 more
- pp 399-404
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TLDR
An instrumentation scheme suitable for non-contact measurement of ac voltage of an insulated conductor is presented, and it is found that its output suffers from effect of various parasitic parameters of the measurement circuit and the sensor.Abstract:
An instrumentation scheme suitable for non-contact measurement of ac voltage of an insulated conductor is presented in this paper The ac voltage of an insulated conductor can be measured by using a suitable probe that forms a capacitive network between the conductor and the ground Basic idea of such a scheme employing online measurement of the capacitances and then using it for the computation of the unknown voltage has been reported earlier We conducted a feasibility of the scheme, and found that its output suffers from effect of various parasitic parameters of the measurement circuit and the sensor In the study, a detailed analysis of the effect of various circuit and parasitic parameters has been conducted and the same is presented in the paper Based on the inference from the analysis, criteria for the design of the sensor electrodes and other circuit components have been accomplished and presented The paper also discusses a simple calibration method to reduce the effect of certain parasitic parameters and hence increase the accuracy of the measurement Moreover a FFT based processing of the measured data has been used in the presented scheme, instead of the complex methods, including analog multiplication, division, etc employed in the earlier reported scheme A prototype of the non-contact ac voltage measurement system has been developed and tested in the laboratory for various frequencies and voltages Worst-case error noticed in the tests conducted was less than 075 %read more
Citations
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Noncontact RF Voltage Sensing of a Printed Trace via a Capacitive-Coupled Probe
TL;DR: In this article, a capacitive-coupled probe was used for noncontact voltage sensing of a printed trace by using an open-end coaxial probe, and achieved through the transfer factor from the printed trace to the probe and a reconstruction algorithm.
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A Noncontact Voltage Measurement System for Power-Line Voltage Waveforms
TL;DR: A complete noncontact (NC) voltage acquisition system, which allows the measurement of power-line voltage waveforms without galvanic contact, is presented, composed of a novel capacitive probe, an analog front end, and a microcontroller-based digital signal processing stage.
Journal ArticleDOI
Development of a Nonintrusive True-RMS AC Voltage Measurement Probe
P. S. Shenil,Boby George +1 more
TL;DR: The design and development of a new nonintrusive-type true-rms ac voltage measurement probe and a prototype of the probe along with the proposed autobalancing circuit have been designed and developed.
Journal ArticleDOI
Noncontact AC Voltage Measurements: Error and Noise Analysis
TL;DR: A capacitive noncontact ac voltage measurement technique and its feasibility to measure arbitrary waveform signals are analyzed, and the analysis of several errors related to the technique is performed, showing the impact of different design parameters on the final accuracy.
Proceedings ArticleDOI
Non-contact long range AC voltage measurement
TL;DR: In this paper, a non-contact AC voltage and frequency measurement system with 600 mm of operation range is presented to overcome the limitations of contacting high voltage terminals, which limits the options for monitoring and maintaining high voltage machinery and power distribution grids.
References
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TL;DR: In this article, an apparatus for performing non-contacting measurements of the voltage, current and power levels of conductive elements such as wires, cables and the like includes an arrangement of capacitive sensors for generating a first current in response to variation in voltage of a conductive element.
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Patent
Non-contact voltage measurement method and device, and detection probe
TL;DR: In this paper, a measurement method for measuring an AC voltage applied to a conductor, without contacting the conductor, using a detection probe, provided with a detection electrode capable of covering part of a surface of insulation for insulating the conductor and a shield electrode for covering the detection electrode, and an oscillator for outputting a signal having a certain frequency, was presented.