Design of Integrated Bearing Condition Real-time Monitoring System
To meet the urgent needs of real-time monitoring of aero-engine high-speed bearing condition,an integrated multi-channel synchronous online monitoring system based on Ethernet transmission was developed.The system integrated the eddy cur-rent sensor front-end and IEPE acceleration support unit and met the needs of induction probe excitation and IEPE power supply at 35~4 400 MHz,realizing high-precision acquisition of speed and vibration sensing signals.It suppressed the stray interference of bearings through hardware anti-aliasing filtering and sliding filtering algorithms.The results show that the measurement error of the cage speed is less than 2 r/min in 0~9 000 r/min,with the relative error less than 0.1%and the vibration sensitivity 200 mV/g.The real-time online monitoring of the bearing state is realized with excellent real-time performance.