SU815475A1 - Linear displacement converter - Google Patents

Description

(54) LINEAR MOVEMENT CONVERTER

one

The invention relates to a measurement technique and can be used to measure linear or angular movements.

A displacement sensor is known, comprising a magnetic core, an excitation winding, two successively connected counter-measuring windings, and a movable short-term pinned coil l.

The lack of a sensor is a high level of residual voltage in the zero position of the short-circuited coil, which leads to a decrease in the sensitivity of the sensor and measurement accuracy.

The closest to the technical essence of the present invention is a linear displacement transducer, containing two C-shaped cores on which the measuring winding 2 windings are placed.

The disadvantage of the transducer is low measurement accuracy.

The purpose of the invention is to improve the measurement accuracy.

The goal is achieved by the fact that the converter is provided with a symmetrically placed, relative to the Shaped cores, an annular closed core with an excitation winding and a movable short-circuited Q1 turn passing through the annular core and C-core gaps, while the plane of the short-circuited coil is perpendicular to the planar plane.

The drawing shows a converter, a general view from above.

The converter contains two C-shaped cores 1 and 2, on which differential differentially connected windings 3 and 4 are placed, an annular closed core 5 s

5 with excitation winding b, placed symmetrically relative to the C-shaped cores, and a movable short-circuited coil 7, passing through the ring core and the gaps 8 and 9 of the C-shaped cores, while the plane of the short-circuited coil is perpendicular to the plane of the cores.

five

The linear displacement transducer works as follows.

Claims (2)

In the initial position, the plane of the movable short-circuited turn overlaps half of the cross-sectional areas of each of the C-shaped cores. The alternating magnetic flux f generated by the field winding; , circulates along a closed ring core and induces a current in a short-circuited turn, which creates magnetic fluxes in C-shaped cores. Flows f, induce in the measuring windings of the EMF, equal in magnitude and phase. The displacement of a short-circuited coil leads to a redistribution of magnetic flux values f, the emf of the measuring windings changes proportionally and an electrical signal arises, the magnitude of which is proportional to the displacement of the short-circuited coil, and the phase characterizes the direction of movement. In the proposed Converter. the plane of the short-circuited coil is located outside the magnetic flux of the winding of the exciter, since the entire magnetic flux circulates around the ring core, which reduces the level of residual voltage. The absence of magnetic coupling to the mode by winding ™ reduces the requirements of a k-magnet. 1. Of the cores and the accuracy of their manufacture. The proposed inverter 1 ::;: zatel is a pros in manufacture and provides high accuracy of measurement not only of linear displacements, but with a slight refinement and angular displacements. DETAILED DESCRIPTION OF THE INVENTION Linear displacement transducer comprising two C-shaped cores on which differential windings are placed, characterized in that, in order to improve accuracy, it is provided symmetrically positioned relative to C-cores, rings w with a closed core with excitation winding and moving short-circuited coil, passing through the ring core and the gaps of the C-shaped cores, while the plane of the short-circuited coil is perpendicular to the plane of the core in. Sources of information taken into account in the examination 1.Loginov V.I. Electrical measurements of mechanical greatness. M., Energie, 1976. 2. USSR author's certificate number 357461, cl. G 08 C 9/04, 1970 (prototype).