Study on Fiber Optical Vibration Monitoring System for Electromechanical Equipment

To improve equipment utilization and guarantee long-term reliable efficiently running for mechanical and electrical equipment, fiber-optic sensing technology is applied to construct mechanical and electrical equipment fiber-optic vibration monitoring system, which can achieve real-time online monitoring and early warning of device status, and provide reliable data for the device fault diagnosis. Field test and comparison showed that the vibration monitoring system meets the equipment needs for vibration monitoring. Introduction Safety monitoring of mechanical & electrical equipment play an extremely important role in safety production to support device running normally and prevent operation accidents. Operating experience shows that mechanical & electrical equipment failure caused by super-vibration, overheating, overpressure and corrosion is a major factor causing a major accident. Mechanical vibration analysis is one of the most important methods to measure the operation of equipment. Machinery vibration condition monitoring can grasp the mechanical integrity degree and mechanical performance characteristics. Currently, the state checks of mechanical & electrical equipment mainly depend on the maintenance and test before running. While the devices are running, the state checks mainly depend on system's operating parameters monitoring and manual inspection. It is clearly that the device operation status assessments are lack of online real-time monitoring. Furthermore, manual inspection methods including infrared temperature measurement, electrical insulation measurement or motor bearing vibration could miss a lot of test points and has high error rate. Major equipment usually has individual device to run statement online monitoring and use lots of electrical sensors. Thus it is difficult to deal with insulation, wiring complex and has poor ability to resist electromagnetic interference, which often leads to large measurement error, and is not conducive to fault monitoring and diagnosis. The fiber optic sensor[1] as an optical measuring instrument has more advantages, such as high sensitivity and resolution, wide bandwidth, high response speed, large dynamic range, small size, long transfer distance, simply wiring, uncharged and anti-electromagnetic interference, anti-radiation, which make it suitable for flammable, explosive space and other harsh environments, etc. And it is much easier to implement real-time fault monitoring and diagnosis. This paper introduces the fiber-optic sensing technology used in electrical & mechanical equipment vibration testing and realization of equipment real-time online status monitoring. Design of Vibration Sensing System for Electromechanical Equipment The system uses vibration sensors designed based on fiber Bragg grating (FBG). The Bragg wavelength of FBG changes with temperature and pressure. A wavelength demodulation system for recognition of the center wavelength under corresponding temperature, pressure, strain and other parameters is used to achieve a sensing function [2-5]. 6th International Conference on Mechatronics, Computer and Education Informationization (MCEI 2016) Copyright © 2016, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Intelligent Systems Research, volume 130