New low-cost fiber optic accelerometer system for stator winding monitoring of hydroelectric generating machines

Jose Miguel Lopez-Higuera; Adolfo Cobo; Miguel A. Morante Rabago; Juan Echevarria; J. L. Arce; Mauro Lomer; R. J. Lopez

doi:10.1117/12.248675

23 August 1996 New low-cost fiber optic accelerometer system for stator winding monitoring of hydroelectric generating machines

Jose Miguel Lopez-Higuera, Adolfo Cobo, Miguel A. Morante Rabago, Juan Echevarria, J. L. Arce, Mauro Lomer, R. J. Lopez

Author Affiliations +

Proceedings Volume 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1996) https://doi.org/10.1117/12.248675
Event: Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy

Abstract

A new fiber optic accelerometer system for stator winding simultaneous multi-point vibration monitoring of hydroelectric generating sets is presented. It is composed of as many sensor heads as points to be monitored, an optical channel and a processing unit distant from the sensing area, which is exposed to strong electromagnetic interference. The evaluation scheme is based on an intensity modulation and differential detection technique so that the measure is not influenced by external perturbations. The system is able to measure accelerations ranging from 30 to 450 Hz, with a maximum amplitude of 200 m/s² RMS. Experimental results for the previous prototypes developed are showed. This sensor is intended to be integrated in a new complex system aimed to reach the goals of instantaneous protection, real time detection and evaluation of defects, failures and malfunctions in the above mentioned machines.

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Jose Miguel Lopez-Higuera, Adolfo Cobo, Miguel A. Morante Rabago, Juan Echevarria, J. L. Arce, Mauro Lomer, and R. J. Lopez "New low-cost fiber optic accelerometer system for stator winding monitoring of hydroelectric generating machines", Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); https://doi.org/10.1117/12.248675

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