SU682942A1 - Magnetic bridge circuit - Google Patents

Description

the bones located under the uta 45 ° to its longitudinal axis.

In both pairs of grooves adjacent to the measuring diagonal, there are: 4 arms of comparison arms in the form of two levers of the first kind and two measuring measuring arms that consist of connecting package 5, test bag 6 and connecting package 7. All the rods of the bridge can slightly alternate in grooves longitudinally with a small lateral course. The upward movement of the rods is limited by a flat lid 8, provided with a round hole for changing the measured package (right). The cover 8 is removed when designing the bridge. Rods 2, 4, bags 5 and 7 are filled with composing of permallo annealed plates glued with strong glue (Fig. 2), bags 5 and 7 are replaceable depending on the type of test bags 6.

The side benches and ends of the rod 2, as well as the ends of the rods of packages 6 and 7 are ground. The rods 4 are ground side pads - contact points with adjustable support 9 rod 4 and contact points with rod 2. Longitudinal movement of rods 4 is limited by stops 10. Terminals 4 have processes from non-glued plates to form a generating diagonal.

On the generator diagonal formed by the connection of the processes of the rod 4, placed the generator coil And the bridge. To eliminate the electromagnetic coupling between the coils 3 and 11, a magnetic shield is laid (not shown in the drawing). The rod 2 is spring-loaded with a flat spring 12 and is loaded by means of a dry plate 13, which is under pressure compressed in the housing 14 of the element 15 of the electrically conductive and stress-sensitive elastomer with electrodes 16. It consists of a cargo screw 18, a fork 19 and a connecting rod 20. A deactivating device is necessary to remove the coupling force between the bridge elements when changing the measured package. Board 1 is placed on base 21, mounted on a massive stand.

The magnetic bridge operates in an unbalanced bridge mode.

The magnitude of the input force of the docking of the bridge elements is controlled by the device 22, and the magnetic permeability is controlled by the device 23 connected to the coil winding 3 clamps. Generator winding

the bridge (coil 11) receives power from the generator 24 fed from the network through the voltage regulator 25. Equalizing the values of private mechanical forces in the 5 joints of the magnetic circuit of the bridge between the rods 2 and 4, 4 and the package 5 is achieved by selecting the position of the contact between the fingers of the adjustable support 9 and the rod 4. This adjustment is used to set the bridge circuit to zero.

Mechano-static system,

formed by measuring rods

the contour of the bridge is as follows.

Under the action of effort dry Porshn 13

5 rod 2 with its side stops creates pressure on both connecting pau2 keta 5, 7, equal to (P is the input force of the system). This force provides magnetic contacts at the three vertices of the bridge. The force in the fourth vertex provides compression of the smooth end of the rod with 2 ends of the rods of the 4 arms of the comparison. it

5g-y-gee

effort is also equal to r. In this way,

The magnetic resistances of the contacts of the vertices of the bridge are leveled and restored.

Claims (2)

1. Goldin O. E. Magnetic bridge. “Automation and Remote Control, № 5, 1950. 2. USSR author's certificate No. 422032, cl. G 11B 5/46, 1972.