RU175142U1 - DEVICE FOR STUDYING ELECTROMAGNETIC FIELD - Google Patents

Abstract

The claimed technical solution relates to devices for measuring variable magnetic quantities, such as the direction or voltage of magnetic fields or magnetic fluxes, and can be used in educational institutions to improve the accuracy of experiments involving electromagnetic phenomena. It also allows you to determine the magnetic field flux density over the surface of the capacitor of the device. The essence of the claimed solution lies in the fact that the device for studying the electromagnetic field contains a housing, a toroidal coil electrically connected to the oscilloscope, mounted in the housing, and the toroidal coil is held by a mount located on the rail fixed in the housing, and is located between two capacitor plates mounted on shafts that pass through holes in the housing, which, in their turn, electrically connected to an alternating voltage source and an oscilloscope, fixed in the housing. In this case, the shafts holding the capacitor plates are connected to the housing, and this connection is a piston locking mechanism. The technical result when implementing the claimed solution is the exclusion of electromagnetic noise in the signal received by the toroidal coil. 1 of FIG.

Description

Technical field

The claimed technical solution relates to devices for measuring variable magnetic quantities: the direction or intensity of magnetic fields or magnetic fluxes.

State of the art

A device for measuring magnetic field induction based on the use of mechanical measuring transducers (patent RU 2282863 C1 "Measurement of the direction or intensity of magnetic fields or magnetic flux", B. Dragunov, G01R 33/02, 08.28.2006) is known from the prior art. The disadvantage of this device, hereinafter referred to as the Dragunov converter, is the low accuracy of measurements due to external interference and the inability to give an accurate result due to the limit of the density of the graduation scale of the capacitor rotation scale.

Utility Model Disclosure

The task to which the claimed technical solution is directed is:

1. to increase the accuracy of measuring magnetic fields,

2. the ability to measure the flux density of the magnetic field along the surface of the capacitor,

3. in eliminating the need to use additional shielding systems of electromagnetic interference.

This problem is solved due to the fact that a sensitive detector “Rogowski belt” is used: a toroidal solenoid with a special compensating counter-current in the transverse plane. With its help, currents are measured from extremely low-frequency to ultra-high-frequency. A 20 pF capacitor is included in its circuit, making it selective to the perceived frequency. The capacitor plates are mounted on movable shafts, which allow you to change the installation geometry, which extends the functionality. The detector is also removable, which allows you to measure fields outside the borders of the plates. Above the moving part of the system is a plastic dome in the form of a truncated pyramid, in the walls of which there is a metal grid - a Faraday cage. It is connected to the ground. Installation materials are plexiglass for the base, plastic for the rest of the elements, and the wires are coaxial.

The technical result provided by the given set of features is the exclusion of electromagnetic noise in the signal received by the detector.

The technical result is achieved by the fact that the device for studying the electromagnetic field, comprising a housing, a toroidal coil electrically connected to an oscilloscope, mounted in the housing, the toroidal coil being held by a mount located on a rail mounted in the housing and located between two capacitor plates mounted on shafts that pass through holes in the housing, which, in turn, are electrically connected to an AC voltage source and an oscilloscope mounted in the housing. In this case, the shafts holding the capacitor plates are connected to the housing, and this connection is a piston locking mechanism.

In addition, the ability to move the detector almost freely in space allows us to study the properties of the magnetic field at any points near the capacitor.

Utility Model Implementation

The technical solution is illustrated in FIG. 1, where the copper plates of the capacitor 5, electrically connected to the alternator 1, create an alternating magnetic field inside itself, it contains a toroidal coil (detector) 6, which is electrically connected to the electronic oscilloscope 2. The plates of the capacitor 5 are mounted on shafts 7, which pass in the supports of base 3. Above the base is a building (Faraday lattice) 4.

The device operates as follows. When the power is turned on in the generator 1, alternating electric current is supplied to the plates. He between the plates of the capacitor generates an alternating magnetic field. It generates a current in the circuit in the toroidal coil 6 using the phenomenon of electromagnetic induction, which detects the oscilloscope 2. If necessary, reduce or increase the capacitance of the capacitor, the shafts rotate a quarter of a turn and move to the required distance and are again fixed.

This technical solution can be applied in educational institutions to conduct accurate experiments and increase the level of assimilation of the material.

Claims (2)

1. A device for studying the electromagnetic field, comprising a housing, a toroidal coil electrically connected to an oscilloscope, mounted in the housing, the toroidal coil being held by a mount located on a rail mounted in the housing, and located between two capacitor plates mounted on shafts that pass through openings in the case, which, in turn, are electrically connected to an AC voltage source and an oscilloscope mounted in the case. 2. The device according to claim 1, characterized in that the shafts holding the capacitor plates are connected to the housing, said connection being a piston locking mechanism.

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