SU1523894A1 - Differential transformer transducer of linear displacements - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to increase the sensitivity and accuracy of the differential transformer linear displacement transducer by increasing the size of the air gap areas in the magnetic converter system and ensuring the constant width of the air gap between the pole teeth and the core plates. The converter contains a stator with two pairs of poles 1 and 2, displaced along its longitudinal axis 3 and made in the form of symmetrically arranged sets of thin-walled rectangular or arcuate frames inserted one into another, the straight end sections of which form directional along longitudinal axis 3 and separated equal air gaps teeth. In the air gaps there are plates of the core. When the core is displaced from the middle position at the output of the measuring windings 5 and 6 connected in series with the counter winding, a signal appears that is proportional to its displacement. To ensure that the gap between the teeth and the plates is constant, there are slide supports with longitudinal grooves in the middle, which act as guides for the stator teeth and core plates, respectively. 3 il.

Description

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The invention relates to a measurement technique and can be used to measure linear movements of objects.

The purpose of the invention is to increase the sensitivity by increasing the size of the air gap areas in the magnetic system of the converter and increasing the accuracy by ensuring the constancy of the width of the air gap.

Fig. 1 shows a differential transformer converter (linear displacement body, top view; Fig 2, the same, side view; Fig 3, a set of arcuate thin-walled cages forming the element of a pair of poles of the stator of the converter.

The differential transformer of the linear displacement transducer contains a stator with two pairs of poles 1 and 2 displaced along its longitudinal axis 3, the excitation winding 4 covers both pairs of poles 1 and 2, and measuring windings 5 and 6 are located each on one of the poles of different pairs and are connected consistently. The converter stator is made in the form of two symmetrically arranged sets of thin-walled rectangular (phi1. 2) or arcuate-shaped frames inserted into the other (fig. 3), whose straight end portions form directional along the longitudinal axis 3 and separated by BL equal airless gaps teeth 7 of both pairs of poles 1 and 2, the transducer Anchor is complete in the form of a set of parallel ferromagnetic plates 8 located in the air gaps between the teeth 7 and fixed on a non-ferromagnetic base 9; Mounted with support on supports 10, to ensure the constant width of the air gaps between the teeth 7 and the plates 8 of the core on the stator and the crust are fixed made of a non-magnetic material supports 11 and 12 slip with longitudinal grooves in the middle, performing functions on the guides for the teeth of both pairs of poles and core plates.

Differential transformer linear displacement transducer works as follows,

In the initial position, the core plates 8 are located on average

poles 1 and 2 are in position. In this case, the oppositely directed electromotive forces induced in measuring windings 5 and 6 by a magnetic flux excited by the excitation winding A are equal and compensate each other. The signal at the output of the converter is zero. When plates 8 are changed, a signal appears at the output of the converter, which is proportional to the value of the monitored linear displacement. The implementation of poles 1 and 2 of the teeth allows a significant increase in the sensitivity of the converter, and ensuring the constancy of the width of the air gaps between the pole teeth and the core plates eliminates errors associated with the closure or displacement of these elements relative to each other.

Claims (1)

Invention Formula 0 five 0 five 0 five Differential linear displacement transducer, containing a ferromagnetic stator with two pairs of poles displaced along its longitudinal axis, an excitation winding covering both pairs of poles, two measuring windings located at one of the poles of different pairs and connected in series oppositely, and installed with linear displacement along the longitudinal axis of measles, characterized in that to increase sensitivity and accuracy, the stator is made in the form of two symmetrically arranged sets of rectangular or arcuate-shaped thin-walled frames inserted one into the other, straight lines the end portions of which form directed along the longitudinal axis and separated by equal air gaps tooth1ts | in both pairs of poles, the measles are made in the form of a set of parallel ferromagnetic plates located in the air gaps between the teeth of the stator poles, and on the stator and the crust there are fixed slip supports with longitudinal grooves in the middle, in which the acistin core and teeth of both pairs of stator poles, respectively. YU FI.2