DEVICE FOR MEASURING ANGULAR ACCELERATION OF SHIFT Russian patent published in 2006 - IPC G01P15/105 

FIELD: measurement technology.

SUBSTANCE: device can be used for measurement of parameters of rotation of shaft of automatic control systems. Measuring device is built on the base of cylindrical magnet domains and microelectronic devices. Ferromagnetic disc with film of single-axis magnetization has two cylindrical magnetic domains spaced for angle of φ_1. The cylindrical ferromagnetic domains rotate due to domain-shifting structures coaxial to shaft at angular velocity of ω_D. Cylindrical ferromagnetic domain detectors D1 and D2 are tightly connected with shaft; detectors are spaced by angle of φ_c. Angular acceleration is found from relation of E=C*(1/t₂-1/t₂), where E is angular acceleration of shaft, C is angular velocity of domain ω_D, t₁ is time during which cylindrical magnetic domain 1 moves along detectors D₁ and D₂, t₂ is time during which cylindrical magnetic domain 2 moves between detector D₁ and D₂. Values of t1 and t2 are found by means of pulse oscillator, pulse counter. Division and subtraction operations are preformed by means of divider and subtraction unit. Cylindrical magnetic domains have small sizes and high speed of movement.

EFFECT: improved precision of measurement: high speed of operation.

1 dwg