MEASURING DEVICE OF A SHAFT'S ANGULAR ACCELERATION Russian patent published in 2005 - IPC

FIELD: the invention refers to the field of measuring parameters of rotation and may be used in automatic control systems.

SUBSTANCE: the measuring device is built on the basis of the technique of cylindrical magnetic domains and microelectronics. A ferromagnetic disc with a tape of monoaxial magnetization has several pairs of cylindrical magnetic domains spaced at an angle ϕ. These pairs of cylindrical magnetic domains are rotating with the help of domain propelling structures coaxially to the shaft with an angular speed ω_d. Firmly connected with the shaft detectors of cylindrical magnetic domains D1 and D2 are spaced at an angle ϕ_c. Angular acceleration is defined according to the formula: ϕ_c = 10^{n ,} n - a whole number, where E - angular acceleration of the shaft, t_{1 -} time of advancement of cylindrical magnetic domain 1 between detectors D1 and D2, t₂ -time of advancement of cylindrical magnetic domain 2 between detectors D1 and D2. Meanings t₁ and t₂ are defined with the help of an impulse generator, an impulse meter and operations of division and subtraction with the help of a divisor and a subtracter.

EFFECT: increasing accuracy and speed of transformation and decreasing dimensions.

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