GEAR MEASURING LINEAR TRANSLATIONS ( VERSIONS ) Russian patent published in 1999 - IPC

FIELD: measurement technology, mechanical engineering, tests of structures, control over technological processes. SUBSTANCE: gear incorporates primary converter and three operational amplifiers. Primary converter is made up of mobile elements, two coaxial cores, measurement winding put on central core and additional winding. Additional winding is uniformly distributed round periphery of one of cores so that its turns embrace it in longitudinal direction and includes two sections. Enhanced measurement precision is achieved thanks to connection of windings and operational amplifiers which is equivalent to connection of measurement winding simultaneously according to logometric circuit with first section of additional winding (compensation of multiplicative component of measurement error) and in opposition with second section of additional winding (compensation of additive component). Gear can be supplemented with fourth operational amplifier which output signal is used to compensate for temperature error. EFFECT: enhanced measurement precision. 12 cl, 5 dwg