SU1288494A2 - Induction displacement transducer - Google Patents

Abstract

The invention relates to a measurement technique and is complementary to the author C. No. 1241058. The aim of the invention is to enhance the functionality by defining the direction of movement. The displacement transducer includes a housing 1 on which the core 2 is fixed, made of a magneto-elastic material. The additional section 3 of the magnetic core of the core 2 is permanently magnetized and is located symmetrically with respect to the permanently magnetized area 4 max-nito. core wires. In section 5 of core 2, measuring winding 6 is placed. In sections 3 and 4 sections 8 and 9 of excitation winding are arranged, connected in series according to. The gear element 10 of the converter serves to communicate with the object of control. In the initial position, the tip 7 of the core is located between the teeth of the gear element 10 and is not in contact with it. When the gear element is moved, one of its teeth makes short-term contact with the tip 7 of the core 2 and bends it, as a result of which the magnetic permeabilities of sections 3 and 4 change and an output pulse appears on the measuring winding 6. 1 il. (L 00. Co 4 14)

Description

The invention relates to a measurement technique, can be used to convert angular or linear movements into a number of pulses, and is an improvement of the device according to the author. No. 1241058.

 The purpose of the invention is to expand the functionality of the displacement transducer by determining the direction of movement of the object under test.

The drawing schematically shows an induction displacement transducer, a general view.

The displacement transducer includes a housing 1, on which the core 2 is fixed with its base, made of a magnetoelastic material. An additional section 3 of the core magnetic core 2 is permanently raised and is located symmetrically constant modally section 4 of the core magnetic conductor on the other side relative to section 5 of the core magnetic core with the measuring winding 6 placed on it 2 are connected with a common apex with a tip 7. In sections 3 and 4 of the core sections 8 and 9 of the exciter windings are connected in series according to which, when connected to the source winding of direct current (not shown) provide a constant biasing magnetic core portions of these two.

The displacement transducer also contains a toothed element 10 for communication with a control object. Teeth 11 gear element

10 are evenly distributed around its periphery; they have a triangular profile and MOj are in contact with the tip of the core 2. The gear element 10, depending on the type of measured movement, can be made in the form of a disk — for angular movements, or

in the form of a ruler - for linear displacements.

Inductive displacement transducer works as follows.

In the initial position, the tip 7 of the core 2 is located between the teeth

11 gear element 10 and does not contact with them. The magnetic fluxes generated by sections 8 and 9 of the winding of the excitation are equal and the resulting magnetic flux in section 5 of the core 2 of the core 2 is zero, as a result of which the emf induced in measuring winding 6 is zero. When moving the gear element 10 (for example, to the right side) one of the teeth 11 briefly comes into contact with the tip 7 of the core 2 and bends the eroi. Section 3 of the magnetic core of the core 2 is compressed and its magnetic permeability decreases, and section 4 of the magnetic core of the core 2 expands and its magnetic permeability increases. As a result, the magnetic flux generated by the excitation winding section 8 increases, and the magnetic flux generated by the excitation winding section 9 decreases, and an output signal appears on the measuring winding 6 When the toothed element 10 moves further, the tip 7 of the core 2 again falls between the rotor teeth, and core 2 recovers its mechanical and magnetic properties. Upon further movement of the gear element 10, the next of the teeth 11 contacts with the tip 7 of the core 2. As a result, a pulse signal appears again on the measuring winding, as a result of which the number of pulses at the output of the converter is proportional to the amount of movement of the test object. When moving the gear element 10 in reverse when the teeth 11 are in contact with the tip, 7 of the core 2 compresses section 3 of the core magnetic core, and section 4 expands, as a result of which the magnetic flux generated projection of the winding 8 excitaton Oden is reduced, and the magnetic flux generated by the excitation winding section 9 increases. As a result, an output pulse of opposite polarity appears on the measuring winding 6.

Thus, the polarity of the output pulses of the converter depends on the direction of movement of the test object, and the number of pulses determines the amount of movement of the test object.

Claims (1)

Invention Formula Induction converter of movements on avt.Sv. No. 1241058, characterized in that, in order to expand the functional possibilities, 312884944 By determining the direction of the core of the magnetic core of the core, it is provided with an accessory with a constant biasing portion of the magnetic core of the heart on the other side relative to the participant with a constant biasing, which is located symmetrically with the first measuring winding located on it.