SU904199A1 - Magnetostriction resonator - Google Patents

Description

(54) MAGNETOSTRIC ION RESONATOR

one

The invention relates to radio engineering and can be used in various radio engineering devices for stabilization and frequency selection.

A magnetostricking resonator is known, comprising a resonant element, excitation and pickup windings, a permanent magnet and frequency control windings.

The disadvantage of the magnetostrictive resonator is the close proximity of the resonant elements, which significantly influence each other's parameters due to the absence of separation screens.

A magnetostrictive resonator is also known, which contains a rod which is fixed at a nodal point of oscillations and placed in a constant magnetizing field created by tubular magnets with sockets, which include protrusions of the frame of the excitation catania. The resonator is equipped with a steel casing-shield that protects the installed near

resonators from mutual influence on the electrical parameters 2.

Significant drawbacks of the resonator are significantly increased dimensions, and due to the fact that the resonant rod does not have a rigid connection with the casing, it has low reliability under shock loads, as a result of which the electrical parameters deteriorate.

The purpose of the invention is to improve the electromechanical parameters and reduce the size of the magnetostriction resonator.

This circuit is reached by the fact that in a magnetostrictive resonator containing a case, inside which is placed a resonant rod, excitation windings and a permanent magnet, the latter is made of two rods placed coaxially with the resonant rod along its cake, and fixed on the surface of the brackets installed inside the case and

in electrical contact with him, a closed magnetic circuit.

Due to the formed steel screen, the resonators can be positioned adjacent to one another, while their electrical parameters will not change. The unchanged parameters are preserved in the presence of constant and variable magnetic fields.

FIG. 1 shows a schematic of a resonator; in fig. 2 - cut on

FIG. one.

The magnetostrictive resonator contains a housing 1, inside which is placed a rod 2, windings of excitation qi 3 and a permanent magnet 4. A magnetostrictor rod 2 is rigidly single with a body of wires 5 by welding .;

The permanent magnet 4 consists of two rods, each of which is placed along the ends of the resonant rod 2 on the same axis with it,

Each rod of the permanent magnet 4 is located inside the body 6 of the coil 3, and its torp is connected by means of glue to the clip 7, which contacts the old case 1, forming a closed magnetic circuit with it.

The body of the coil 3 excitation and

The pickup has terminals 8. To ensure sealing, the resonator from the ends is filled with a sealant.

The device works as follows.

When an alternating voltage of a certain frequency is applied to the pins 8 of the excitation coil 3, an alternating electromagnetic field arises in it that acts on the resonant rod.

When the frequency of the supplied alternating voltage coincides with the resonant frequency of the rod, the latter performs longitudinal oscillations. As a result, an emf arises in the coil 3, and the voltage of the desired frequency is removed from the outputs of this coil.

The rigid connection of the resonant rod with the housing, as well as the connection of the magnetic rods with brackets in contact with the housing, allows the creation of a closed magnetic conductor with small dimensions of the resonator and ensures its reliable operating conditions in small-sized products operating with large mechanical overloads.

Claims (2)

Invention Formula A magnetostrictive resonator comprising a housing inside which a resonant rod is located, an excitation winding and a permanent magnet, characterized in that, in order to improve electromechanical parameters and reduce the dimensions of the resonator, a permanent magnet in it is made of two pins, spaced coaxially with the resonant rod along its ends, and is fixed on the surface of the brackets installed inside the case and being in electrical contact with it, forming a closed magnetic circuit. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 387498, cl. H 03 H 3/06, 1971. 2..Avtorskoe certificate of the USSR. № 126526, cl. N OZ K 9/22, 1958.