SU1413407A1 - Linear-and-angular movement differential-transformer transducer - Google Patents

Abstract

The invention relates to a measurement technique and is aimed at simplifying the construction of a transformer converter, which provides simultaneous measurement of both linear and angular movements independently of one another. This converter contains two coaxially arranged cylindrical magnetic cores, on one of which the primary field winding is placed, and on the other. hom - sectioned secondary windings 5 and 6 for measuring linear and angular movements, respectively. The primary winding, common for measuring circuits of both linear and angular displacements, is made in the form of two semiring sections, which are placed in annular grooves on the inner surface of the external magnetic core 1, and connected to their straight lines 4, which are placed in two diametrically opposite longitudinal grooves. In the process of measuring displacements, the annular sections of the winding 5 interact with annular sections of the excitation windings to measure linear displacements, the angular displacement between which does not affect the measurement result. When measuring the angular movements, the linear sections 4 of the excitation winding and the longitudinal sections of the winding 6 located on the magnetic core 2, which is installed with the possibility of linear and angular displacements relative to the magnetic core 1, interact. 3 Il. S (L 00 4 0 keu

Description

The invention relates to a measurement technique and makes it possible to measure simultaneously and independently one from another both linear and angular movements of objects of various purposes.

The aim of the invention is to simplify the design of a linear and angular displacement transformer by eliminating the primary excitation winding in the channel of measuring angular displacements, as well as by eliminating the diamond-shaped rotor, which is difficult to manufacture.

FIG. 1 shows schematically the constructive implementation of a linear and angular displacement transformer converter; figure 2 - the same scan; on fig.Z - relative position of the windings of the Converter.

Transformer linear and angular displacement transducer contains two coaxially arranged cylindrical magnetic conductors 1 and 2. In two annular grooves on the inner surface of the external magnetic conductor 1 there are semi-annular sections 3 of the excitation windings connected by straight sections 4, which are laid in diametrically opposite slots on the same magnetic surface. 1, In the two annular grooves of the inner magnetic circuit 2, which is mounted for rotation and linear movement Along its longitudinal axis, annular sections 5 of the secondary winding are placed to measure linear displacements that are interconnected differentially. In diametrically opposed longitudinal grooves on the surface of the same magnetic core 2, sections of the secondary winding 6 are placed for measuring the angular displacements, connected between themselves by transverse connecting sections 7, which pass through the through holes in the magnetic core, perpendicular to its longitudinal axis and located between the annular grooves On him

The primary excitation winding is connected to the source Uj of the AC power supply during the measurement.

T Einsformator Converter works as follows.

When the internal magnetic circuit 2 is rotated about its longitudinal axis by an angle / i, the distances are measured

Q 5

0

5 0 0

five

five

between the longitudinal sections of the secondary winding 6 for measuring the angular displacements and the longitudinal sections 4 of the primary excitation winding of the converter. As a result, the magnetic resistance varies along the path of the magnetic flux through the winding 6 (Fig. 3). With an increase in this distance, the magnetic flux FD decreases, and with decreasing it increases, which leads to a corresponding almost proportional change in the emf of the LEU on the winding pins 6

With linear displacement / Jx of the internal magnetic core 2 relative to the external magnetic core 1 along their longitudinal axis, the distance between the semi-ring sections 3 of the primary excitation winding of the converter and the ring sections 5 of its secondary winding changes to measure the linear displacements, due to which the voltage induced in one from sections 5 of this winding, it increases, and in the other, it decreases. This leads to a double change in the total emf of the LED, taken from the terminals of this winding and changing almost proportionally depending on the linear movement of the L x of the object being monitored.

Due to the fact that the same common primary excitation winding is used to measure both linear and angular displacements, as well as the absence of a mobile rhomboid rotor, the construction of a transformer converter, which provides independent measurement of both linear and angular displacements, is simplified. This independence of measurements is due to the absence of the mutual influence of secondary measuring circuits of linear and angular displacements due to their charge-perpendicular arrangement.

Claims (1)

Invention Formula A linear and angular displacement transformer containing two coaxially arranged cylindrical magnetic conductors and partitioned primary and secondary windings for measuring linear and angular displacements; the primary winding sections are located in two annular grooves on the inner surface of the external magnetic core equidistant from its ends, and secondary winding sections for measuring angular displacements are placed in two diametrically opposed longitudinal grooves on the external surface of the internal magnetic core, characterized in that, in order to simplify the design, the primary winding sections are made semicircular and are connected by straight linear sections laid in diametrically opposed longitudinal grooves; Yes, the internal magnetic core is mounted for rotation and linear movement along its longitudinal axis and is made with two annular grooves equidistant from its ends, in which differentially connected sections of the secondary winding for measuring linear displacements are placed, and through openings located between the grooves perpendicular to its longitudinal axis and serving to accommodate transverse connecting portions in them in sections of the secondary winding for temporal angular displacements.