APPARATUS FOR MEASURING VIBRATIONS Russian patent published in 2003 - IPC

FIELD: measuring processes and equipment, possibly vibrodiagnostics of technical state of low-speed power aggregates of hydraulic power stations and their basic constructions. SUBSTANCE: apparatus includes pickup for measuring vibration movements. Said pickup is combined with sensitive member of electromagnetic system. Signal from outlet of input transducer is fed to integrating, differentiating and aperiodic amplifiers and to inlet of resistive bridge circuit. The last has in one arm thermosensitive resistor combined with heater. Outlet of aperiodic amplifier through unit for setting dead zone is connected with heater. Summed signal from outlets of differentiating and integrating amplifiers and resistive bridge circuit is fed to windings of electrodynamic system of sensitive member. EFFECT: possibility of automatic drift of own resonance frequency and the whole measurement range of apparatus to low-frequency band, automatic centering and correction of damping degree independently upon direction of gravity action on sensitive member. 2 dwg