SU1550427A1 - Electromagnetic radiometer - Google Patents

Abstract

The invention relates to a measurement technique and can be used as a compact switchboard measuring device of an electromagnetic system. The aim of the invention is to reduce the size and weight by simplifying the design. The logometer includes a housing 1, cylindrical measuring coils 2 and 3, transition sleeves 4, 5 with holes 6, 7 and a semi-cylindrical slot 8, bearings 9, 10 rolling, ferromagnetic core 11, made in the form of a shaft with two rods 12 and 13 and flats, flat scale 16 and pointer 17. 4 Il.

Description

The invention relates to a measuring technique. N can be used as compact gauges of an electromagnetic system.

The purpose of the invention is to reduce the size and weight.

FIG. 1 shows a logometer, front view with a central transverse section; in fig. 2 - logometer, top view; in fig. 3 shows a section A-A in FIG. FIG. 4 is a section BB in FIG. one.

The log tr contains a housing 1, in which cylindrical measuring coils 2 and 3, transition sleeves 4 and 5 are coaxially placed, in each of which vertical holes 6 and 7 are made eccentric to the longitudinal axis of the transition sleeve. The first adapter sleeve 4 is made with a vertical through slot 8 in the form of a half cylinder, whose axis coincides with the axis of the hole in the adapter sleeve 4. Roller bearings 9 and 10 are fixed in the vertical holes 6 and 7 of adapter sleeves 4 and 5. The ferromagnetic core 11 is designed as a cylindrical shaft with two rods 12 and 13 along the longitudinal axis of the shaft from its opposite ends and two identical parallel flats 14 and 159 made from opposite ends to the middle of the shaft on both sides and parallel to the plane, the passage her through the axis of the shaft. The device contains a flat scale 16, pointer 17,

one end of which is connected to the fer

with a magnetic core 11. The middle part of the pointer 17 is located in the slot 8 of the transition sleeve 4. The end portion of the indicator 17 is located above the flat scale 16. The rods 12 and 13 of the ferromagnetic core 11 are placed in bearings 9 and 10.

With the de-energized measuring coils 2 and 3, the ferromagnetic core 11 is in an arbitrary position. When fed to the measuring coils 2 and. 3 currents, the ratio between which is measured by the logometer, the ferromagnetic core H and the pointer 17 are rotated relative to the ring scale 16 by an angle proportional to the ratio of the measured currents.

This is explained as follows. It is known that in the presence of a magnetic field a core of ferromagnetic material always tends to be oriented so that the energy of the magnetic field

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was minimal. Therefore, when fed to the upper (Fig. 1) coil 2 of the measured current, the upper part of the core 11, due to its asymmetric position, tends to turn with its round part to the axis of the coil 2, and the ferromagnetic core tends to turn counterclockwise (Fig. 2). When a measured current is applied to the lower measuring coil 3, the lower part of the core 11 is operated, where the flat top is removed from the other side, and the core 11 tends to turn clockwise. As a result, the entire core 11 is rotated by an angle determined by the ratio of the currents in the measuring windings 2 and 3. If these currents are equal, then the core 11 is located so the flat faces are parallel to the radius vector of the core eccentricity relative to the longitudinal axis of the measuring coils 2 and 3.

If the current in the coil 3 is greater, then the core 11 rotates counterclockwise; if there is more current in coil 2, the core is turned clockwise. The semi-cylindrical slot 8 in the transition sleeve 4 allows the pointer 17 to rotate to each side at an angle of 90 ° relative to the ring scale 16.

Claims (1)

Invention Formula Electromagnetic logometer containing coaxially placed in the body two cylindrical measuring coils, rolling bearing, ferromagnetic core, flat scale placed perpendicular to the axis of the rolling bearing, a pointer connected at one end with a ferromagnetic core, characterized in that, in order to reduce dimensions and mass, It is equipped with a rolling bearing, two transition sleeves, in each of which there is a vertical hole eccentric to the longitudinal axis of the transition sleeve, the first transition the sleeve is made with a vertical through-slit in the form of a half-cylinder, whose axis coincides with the axis of the hole in the transition sleeve, the ferromagnetic core is made; opposite ends to the middle of the shaft on both sides and parallel to the plane passing through the shaft axis, while in each measuring coil, the corresponding transition w is located coaxially with it street and in vertical 5504276 Roller bearings are fixed in the holes of the adapter sleeves, in which the shaft rods of the ferromagnetic 5 core are placed, in the slot of the first adapter sleeve there is a middle part of the gauge, the second channel of which is located above the flat scale. Aa fig.Z FIG. 2 6-6 figl