SU1315792A2 - Inducion transducer - Google Patents

Abstract

The invention relates to the measurement technique, is an improvement of the invention according to the author. St. No. 1252663 and is intended to convert small angular deviations of an object relative to its initial position. The object of the additional invention is to extend the functionality of the induction sensor to measure changes in the angular position of an object by adjusting the electromagnetic moment of resistance to the rotation of the sensor rotor. To ensure this, the angular position sensor is equipped with a thin-walled glass 10 with pairs of flat coils 12 equally spaced along its periphery and a cylindrical sleeve 11 with flat permanent magnets 13 of alternating polarities fixed on its outer surface. The sleeve is placed inside a thin-walled glass, and the number of permanent magnets on the sleeve is equal to the number of pairs of flat coils per glass. The electromagnetic moment of resistance to the rotation of the rotor 8 to keep it in its initial angular position is created by means of catupacks 12 connected to a constant current source and interacting with permanent magnets 13. The magnitude of the torque is adjusted by changing the current in the coils 12. 2 or less. S (pp / 2 //. /

Description

eleven

The invention relates to a measuring technique and is intended to transform small angular deviations of the position of an object relative to the initial angular position and is an improvement of the invention according to the authors. St. No. 12526h3,

The purpose of the invention is to expand the functionality of an inductive sensor for measuring the angular position by adjusting the electromagnetic moment of resistance of the rotor of the sensor.

FIG. 1 shows an induction sensor, a longitudinal section; in fig. 2 is a section A-A in FIG. 1.

The sensor contains a smooth stator 1 with an annular slot 2, which divides it at the bottom of the sympathetic parts 3 and 4. The excitation winding 5 is placed in the annular slot and is connected to an AC power source (not shown). On each part of the stator 1, symmetrically with respect to the excitation winding 5, there are pairs of flat sections 6 and 7 of the measuring windings uniformly distributed along the stator periphery. Sections 6 and 7 of the measuring windings are connected in series and in each pair. The plane of the winding 5 excitation perpendicular to the plane of the sections of the measuring windings. The rotor 8, which is kinematically associated with the control object in the measurement process, has a serrated surface. The number of teeth 9 of the rotor 8 is equal to the number of pairs of sections of the measuring windings. The dimensions of these teeth and sections 6 and 7 of the measuring windings are determined by the operating range of the change in the angles of deviation of the object from its initial position. A thin-walled cup 10 and a cylindrical sleeve 11 rigidly connected to the rotor 8 are mounted in the inner cavity of the rotor 8. alternating polarity. The number of permanent magnets on the sleeve is equal to the number of pairs of flat coils on the glass

Induction works as follows.

57922

The excitation magnetic flux created by the excitation winding 5 induces an emf in sections 6 and 7 of the measuring windings of the sensor. With a symmetrical arrangement of the teeth 9 of the rotor 8 relative to sections 6 and 7 of the measuring windings in a given initial position of the object, the EMF in these sections have the same value. Insofar as

fO sections 6 and 7 are turned on, the sensor output is zero. When the angular position of the object and the rotor 8 connected with it changes from a predetermined initial position, the emf induced in sections 6 and 7 of the measuring windings changes. As a result, an output signal equal to the difference of emf of these sections appears and is proportional to

20 of the angular position of the rotor 8.

Expansion of the sensor functionality, which consists in creating and adjusting the electromagnetic moment of resistance to rotation

25 of the rotor 8 to keep it in its original state, is provided with the help of coils 12 connected to a DC power source. In the interaction of direct current

The 30 permanent magnet coils 12 generate an electromagnetic moment of resistance to the rotation of the rotor 8, the value of which is regulated by changing the value of the direct current.

J5 in coils 12.

Claims (1)

Invention Formula Induction sensor on aut, ev, 40 1252663, characterized in that, in order to extend the functionality by adjusting the electromagnetic moment of resistance to the rotation of the rotor of the sensor, 45 it is provided with coaxially mounted in the inner cavity of the rotor on its axis of rotation with a thin-walled glass with pairs evenly distributed along the periphery of its inner surface. 50 flat coils, and a cylindrical sleeve with flat permanent magnets of alternating polarity fixed on its outer surface, the sleeve is placed inside a thin-walled cup and rigidly connected to the rotor, and the number of permanent magnets on the sleeve is equal to the number of pairs of flat coils on the cup. 12 Or L. Kozoriz 2344/42 Compiled by T. Bychkova Tehred M.Hodanich Cor Po Circulation 677 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 2 Proofreader G. Reshetnik Subscription