PICKUP FOR MEASURING DIFFERENCE IN SPEED OF ROTATION OF AXIALLY ALIGNED SHAFTS Russian patent published in 2008 - IPC G01P3/04 G01P3/40 

FIELD: measuring technique.

SUBSTANCE: pickup comprises rotors mounted on the shafts to be tested and stators. Two rotors made of permanent magnets are mounted on two axially aligned shafts. The magnets rotate around the stator made of unmovable electromagnets that are secured to two cantilever beams. The beams are set into the coils of fiber-optic interferometer. When the rotors rotate the permanent magnets periodically cooperates with the electromagnets of stators. The beams affect the fiber coils of the interferometer, and series of pulses thus are generated at the output of the interferometer that carry the information on velocity characteristics of shafts.

EFFECT: enhanced precision.

3 dwg