SYSTEM AND METHOD FOR DETERMINATION OF SPINNING SHAFT TORSION OSCILLATION PARAMETERS Russian patent published in 2014 - IPC G01H11/06 

FIELD: instrumentation.

SUBSTANCE: system comprises shaft 1 angular displacement info elements composed of, for example, teeth 3 of gear 2 fitted on shaft 1. Shaft rpm info element composed of single tooth 6 at separate gear ring 7 or tooth 3.1 of said gear ring 2 is fitted also on said shaft 1. Besides, fixed transducers 4 and fixed rpm transducer counter located in its info element location surface are arranged outside shaft 1. Besides, it comprises hardware-software unit connected with said transducers for conversion and mathematical processing of transducers data. It differs from know designs in that second transducer 5 identical to first one 4 is fitted in every measurement plane at 180 degrees thereto on shaft 1 opposite side. The number of info elements in every measurement plane is even. Every info element makes a pair with the other info element (tooth 3) located in the same diameter on opposite side of shaft 1. Proposed method comprises measurement of time interval t_i between reference pulse of tooth 3.1 and current pulses. For every pair of serial pulses with numbers i and i+k/2 defined are the half-sum of time intervals Δti=0.5(t_i+k/2+t_i), instantaneous angular displacements of current pulses φ_i=Δt_i·ω_j relative to reference; pulse and distribution of said instantaneous angular displacements caused by torsion oscillations Δφ_i=φ_i-φ_0i.

EFFECT: higher accuracy and validity.

3 cl, 5 dwg