A Portable Prognostic System for Bearing Monitoring

This paper summarizes the development of a practical and high performance bearing prognostic system, which contains a portable hardware data acquisition system with flexible and modular prognostic tools. The data acquisition system has a multi-sensor analog to digital (A/D) card with USB connection, a laptop, and a modular software based on Labview. The low-cost A/D card from National Instruments can simultaneously acquire multiple sensor data (such as accelerometer, tachometer and load cell) at high sampling rates (48 KS/s). The Labview based software can run in any laptops and PCs. The basic functions of the software include: (1) data acquisition control (sampling rate, sensor selection, etc.); (2) application configuration manager (each configuration addresses one application); (3) feature selection (spectrum-based features or time-domain based features) (4) prognostic tool library (the library will be expandable); (5) visualization of data acquisition, feature trend plots and prognostic results; (6) data management (raw data and log data storage, retrieval, etc.). Simulation experiments using actual bearing test data demonstrated the functionalities of the system.

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