SU1051391A1 - Magneto-elastic force transducer - Google Patents

Abstract

MAGNETIC MANUFACTURING EFFORTS CONVERTER containing a cantilever magnet with a & with a coil of revival and measuring windings, I distinguish it by the fact that, in order to increase the sensitivity, the magnetic conductor is made in the form of an isosceles trapezium with otoaoM, separated by pfyx help. the jumpers are divided into three parts, with the jumpers connecting the middle of the larger base to the opposite vertices of the window, the measuring windings are located between the small base of the trapezium and the window, and the excitation winding covers the jumpers. ate with so

Description

The invention relates to a technique for measuring forces, namely, to transform the magnetic properties of a material depending on a material. A magnetoelastic transducer is known, which is a cantilever structure, which consists of two detachable parts . Plates of ferromagnetic material are fixed on one side of each half of the base. The projections on the other side are intended to be connected with the projections of the second half. Along the base, as in the plates, there is a window for accommodating the windings Cl. However, the use of non-ferromagnetic bases reduces the sensitivity of the transducer, as mechanical. stresses arising at the bases are not used to extract the useful signal. The closest in technical terms to the present invention is a magnetoelastic padded jacket, a force containing a cannon-mounted magnetic conductor with an excitation winding and four rows of holes in which the measuring winding is laid, the elements of which are located on opposite sides of the neutral magnetic conductor line in parallel planes and included in a differential circuit to increase sensitivity with simultaneous operation of aa-Dchshsa on low resistance and high resistance on -; loads, it is provided with a second independent measuring winding, laid in the holes of the magnetic circuit in the planes perpendicular to the plane 1 l of the first measuring winding, and the excitation winding is wound around the external surface of the magnetic circuit between the sections with elements of the measuring windings 2 In the sensor magnetic circuit there is a gap of . Magnetic Resistance. " The air gap significantly exceeds the magnetic resistance of the rest of the magnetic circuit, thereby reducing the sensitivity of the sensor. The purpose of the invention is to increase the sensitivity. The goal is achieved by the fact that in a magnetoelastic force transducer containing a cantilevered magnetic wire with an excitation winding and measuring windings, the NtarHH conduit is made in the form of an isosceles trapezium with a window divided by two jumpers into three parts, with the jumpers connecting the middle pain The iuero bases with opposite apexes of the window, the measuring windings are located in the area between the edge of the small base of the trapezium and the window, and the excitation winding stretches jumpers. FIG. 1 shows a converter, a general view, in FIG. 2 shows a replacement circuit for a converter magnetic circuit. The converter contains magnetic core 1, base 2, jumpers 3, holes 4, measuring windings 5 and 6i magnetizing winding 7., “M2-“. -Magnetic resistances of the sections AC (CE), AB, CB, DM, ED, VD of the magnetic circuit, F. - magnetomotive force of the magnetizing winding; F is the magnetic flux flowing through the HP section. The Converter operates as follows. When the measured force is equal to the nupu (), the magnetic circuit of the transducer is symmetric with the M-1 MV of the magnetic bridge balanced. and the magnetodvigy is equal to O. O. Through the magnet {Еой jOTOTOK is absent. At the outputs, measure the KNI K winding voltage equal to zero. When the measured force is not equal to (), the jumpers AB and DM are stretched, and CB and ED are compressed, as a result of which the magnetic resistances t, and Cd decrease, and R w. (mz increase. Symmetric magnetic circuit is broken. Between points B and D there is a magnetomotive force, which creates a diamagnetic flux через through R. At the output of the measuring windings, voltage proportional to the force R is generated.

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Claims (1)

MAGNETOELASTIC EFFICIENCY CONVERTER containing a cantilever-mounted magnetic circuit with an excitation winding and measuring windings, characterized in that, in order to increase the sensitivity, the magnetic circuit is made in the form of an isosceles trapezoid with a window divided by two jumpers into three parts, while the jumpers connect the middle the larger base with the opposite and the tops of the window, the measuring windings are located on the site between the edge of the small base of the trapezoid and the window, and the excitation winding covers emoticons. ιβείδοΓ η