ANGLE-DATA TRANSMITTER Russian patent published in 1998 - IPC

FIELD: measurement technology. SUBSTANCE: transmitter has magnetic core 1 the projections of which carry magnetosensitive elements 2 and 3 inserted in measuring bridge circuit. Ferromagnetic rotor 4 is positioned in space between projections of magnetic core 1. Permanent magnet 5 is secured to rotor axle. Cross-section of magnet 5 is limited by two sections of Archimedean spiral. Longitudinal section of magnet 5 is made as right triangle, the smaller leg of which is arranged in Archimedes spiral zone having the smallest radius of curvature, and hypotenuse face magnetic core. Transmitter is provided with auxiliary rotor 6 rigidly fixed to magnetic core 1. Magnet 5 is magnetized radially. With rotor 4 or 6 turning values and areas of clearances between rotor 4 and magnetosensitive elements 2 and 3 change differentially, as a result of which permeance of the above-indicated clearances varies in opposite directions. With simultaneous turning of rotor 4 and 6, transmitter output signal is in proportion with algebraic sum of angles of turn of objects being checked. EFFECT: higher measurement accuracy. 2 dwg