SU442502A1 - Readout element for transform-code converter - Google Patents

Description

one

The invention relates to the field of automation and computer technology, in particular "devices for representing analog values in discrete form.

A reading element for digital displacement transducers is known, comprising a three-core magnetic circuit disposed with a gap relative to the coding track with teeth. The magnetic circuit is located in a plane perpendicular to the direction of movement of the coding track.

The proposed reading element differs from the known one in that it has a three-rod magnetic conductor located in a plane parallel to the direction of movement of the coding track. Moreover, the outermost rods have a width equal to the division of the coding track, and are separated from each other, counting along the line passing through the midpoints of their width, into an odd number of divisions of the coding track, and the middle rod is located midway between the outermost rods, and has a width equal to the even number of coding lane divisions.

This makes it possible to reduce the change in the magnitude of the current in the primary winding in the process of moving the coding track and to increase the amplitude of the output signal, which, as a result, increases the reliability of the reading element.

In the drawing. The proposed element is shown. The reading element consists of a three-core magnetic core 1, the extreme rods 2 and 3 of which, along the width, are equal to the division value of the coding track 4 and one

from the other, counting along lines passing through the midpoints of their width, into an odd number of divisions of the coding track, and the middle rod 5 is located midway between the outermost rods 2 and 3 and is equal in width to

an even division number of the coding track. The magnetic core 1 is located in a plane parallel to the direction of movement of the coding track 4 with a certain gap relative to this track. On the middle rod

5, the primary winding 6 is located, connected to the source of the titanium 7. The secondary windings 8 and 9 are located on the outermost rods x 2 and 3 and are connected to each other in series and oppositely.

The output signal of the reading element depends on the location of the tooth or the cavity of the coding track 4 under the rods 2 and 3, i.e. the magnitude of the magnetic conductivities of the corresponding air gaps.

When moving coding track 4 to

in the direction of the arrows (see drawing) these conductivities change, and their sum remains almost constant. Due to the accepted ratio between the width of the middle rod 5 and the magnitude of the division of a tooth or trench coding, with its track 4, when moving the latter, the magnetic conductivity of the air gap between the middle rod 5 and its coding 4 also changes only slightly.

In the proposed reading element, a practically constant current value is obtained in the primary winding.

Subject invention

The transducer-displacement transducer element contains a three-core magnetic core with a gap relative to the coding track with the primary winding on the middle rod connected to the power supply and the secondary

windings placed on the outermost rods and connected to each other in series and oppositely, characterized in that, in order to increase the reliability of the conversion operation, the magnetic circuit is located

in a plane parallel to the direction of movement of the coding track; moreover, the outermost rods have a width equal to the division value of the coding track, and are separated from one another by an odd number of divisions

coding track, and the width of the middle rod is equal to an even number of coding track divisions.