A magnetic field simulating device for current measuring instruments testing purpose

2014 ◽  
Vol 28 (3) ◽  
pp. 301-309 ◽  
Author(s):  
M. Samplón-Chalmeta ◽  
Antonio Usón ◽  
Jesús Letosa ◽  
Joaquín Mur-Amada
Keyword(s):  
Magnetic Field ◽  
Measuring Instruments ◽  
Current Measuring

Half division two-dimensional method for simple sinusoidal quantities parameters accurate measurement

2021 ◽  
pp. 16-21
Author(s):  
Kirill Yu. Solomentsev ◽  
Vyacheslav I. Lachin ◽  
Aleksandr E. Pasenchuk
Keyword(s):  
Measuring Instruments ◽  
Measured Signal ◽  
Two Dimensional ◽  
Measuring Device ◽  
New Approach ◽  
Precision Measuring ◽  
Useful Signal ◽  
Midpoint Method ◽  
Order Of Magnitude ◽  
Current Measuring

Several variants of half division two-dimensional method are proposed, which is the basis of a fundamentally new approach for constructing measuring instruments for sinusoidal or periodic electrical quantities. These measuring instruments are used in the diagnosis of electric power facilities. The most general variant, called midpoint method, is considered. The proposed midpoint method allows you to measure much smaller than using widespread methods, alternating currents or voltages, especially when changing the amplitude of the measured signal in very wide ranges, by 1–2 orders of magnitude. It is shown that using the midpoint method it is possible to suppress sinusoidal or periodic interference in the measuring path, in particular, to measure small alternating current when sinusoidal or periodic interference is 1–2 orders of magnitude higher than the useful signal. Based on the results of comparative tests, it was found that the current measuring device implementing the midpoint method is an order of magnitude more sensitive than the currently used high-precision measuring instruments.

scholarly journals The development of the magnetic system of sensor for PMR-analyser

2020 ◽  
Vol 22 (4) ◽  
pp. 115-122
Author(s):  
A. Y. Svinin ◽  
R. S. Каshaev ◽  
O. V. Коzelkov
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic System ◽  
Scientific Paper ◽  
Magnetic Sensors ◽  
Measuring Instruments ◽  
Main Task ◽  
Magnetic Field Homogeneity ◽  
Nuclear Magnetic

The enhancement of the measuring instruments accuracy has always been the most crucial task for engineers and scientists. In particular, in the field of nuclear magnetic resonance, the creation of uniform magnetic field often defines the results of measurements, therefore the main task of this study is to develop Halbach magnet array based on design characteristics of developing NMR-analyzer. The research describes the development process of the main sensor’s magnetic system components for continuous-flow portable NMR-analyzer. The scientific paper makes a different variations analysis of Halbach magnet arrays on the degree of the magnetic field homogeneity, shows the process of development and production of the 3D-framework for Halbach magnet array for NMR-analyzer. The article also gives information on the design of quartz generator based on Pierce oscillator circuit for receiver-transmitter coil of the NMR-analyzer’s sensor. The results could be useful for the magnetic sensors design with high degree of homogeneity, measuring instruments and devices using the method of nuclear magnetic resonance in its foundation.

scholarly journals Precision Analysis and Design of Rotating Coil Magnetic Measurements System

2020 ◽  
Vol 10 (23) ◽  
pp. 8454
Author(s):  
Soontorn Odngam ◽  
Chaiyut Preecha ◽  
Prapaiwan Sanwong ◽  
Woramet Thongtan ◽  
Jiraphon Srisertpol
Keyword(s):  
Magnetic Field ◽  
Control System ◽  
Magnetic Measurements ◽  
Speed Control ◽  
Measuring Instruments ◽  
Dipole Magnet ◽  
Analysis And Design ◽  
Speed Control System ◽  
The Impact ◽  
The Magnetic Field

This research presents the design and construction of measuring instruments for a dipole magnetic field using a rotating coil technique. This technique is a closed-loop speed-control system where a Proportional-Integral (PI) controller works together with the intensity measurement of the magnetic field through the rotating coil. It was used to analyze the impact on the accuracy of the electromagnetic at speed ranges of 60, 90, and 120 rpm. The error estimation in the measurement of the normal dipole and skew dipole magnet caused by the steady-state error of the speed control system and the rotational search coil in whirling motion are demonstrated. Rotating unbalance, shaft coupling, and misalignment from its setup disturbed the performance of the speed control system as a nonlinear system.

Increasing the Accuracy of Magneto-Optical Current Measuring Instruments

2014 ◽  
Vol 57 (9) ◽  
pp. 1041-1045 ◽  
Author(s):  
A. I. Evstaf’ev ◽  
M. A. Urakseev
Keyword(s):  
Measuring Instruments ◽  
Current Measuring

scholarly journals New Electromagnetic Force-Displacement Sensor

2016 ◽  
Vol 6 (2) ◽  
pp. 560
Author(s):  
Amine Benabdellah ◽  
Zakarya Abbassi ◽  
Abdelrhani Nakheli
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Force ◽  
Force Sensor ◽  
Sensor Response ◽  
Displacement Sensor ◽  
Measuring Instruments ◽  
Active Elements ◽  
Average Accuracy ◽  
Force Displacement ◽  
The Magnetic Field

A new electromagnetic force-displacement sensor is presented. Its operating principle is based on the fundamental laws of electromagnetism (Faraday-Lenz law) and the mechanical properties of a spring. The active elements are two coils made by a wire of 60 µm in diameter. Using different wire diameters or different number of wire turns in the coil modify the intensity of the magnetic field and the sensor response. The average accuracy of the sensor is about ∆d=1µm, and as a force sensor is about ∆F=1µN. This sensor could be successfully used for the manufacture of several measuring instruments.

A Novel Calibration Method for Ampere’s Law-Based Current Measuring Instruments

2015 ◽  
Vol 64 (3) ◽  
pp. 715-722
Author(s):  
Miguel Samplon-Chalmeta ◽  
Joaquin Mur-Amada ◽  
Antonio Uson Sardana ◽  
Jesus Letosa Fleta
Keyword(s):  
Calibration Method ◽  
Measuring Instruments ◽  
Current Measuring ◽  
Ampere’S Law ◽  
Ampère’S Law

scholarly journals On copper electrolysis in Vacuo

1894 ◽  
Vol 55 (331-335) ◽  
pp. 66-83 ◽  
Keyword(s):  
Simple Form ◽  
Copper Sulphate ◽  
Measuring Instruments ◽  
Copper Salts ◽  
Faraday’S Law ◽  
Physical Laboratory ◽  
Current Measuring ◽  
Made In

The following research upon the electrolysis of copper sulphate in vacuo was commenced nearly two years ago, at the suggestion of Dr. Schuster, and the experiments were made in the Physical Laboratory of the Owens College. The electrolysis of copper salts is interesting, not only theoretically as affording a verification of Faraday’s Law of Electrolytes, but also practically on account of its constant use in the graduation of current-measuring instruments, such as tangent galvanometers and ammeters. It is known that copper sulphate in solution does not conform rigorously to the simple form in which Faraday’s law is generally expressed.

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