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

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URI: http://hdl.handle.net/10902/4605
ISSN: 1996-756X
ISSN: 0277-786X
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Autoría
López Higuera, José MiguelAutoridad Unican; Cobo García, AdolfoAutoridad Unican; Morante Rábago, Miguel Ángel; Echevarría Cuenca, JuanAutoridad Unican; Arce Diego, José LuisAutoridad Unican; Lomer Barboza, Mauro MatíasAutoridad Unican; López Ruisánchez, Roberto
Fecha
1996-08-23
Derechos
© 1996 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Publicado en
Proceedings of SPIE, 1996, vol. 2868, 510-514
Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy
Editorial
SPIE Society of Photo-Optical Instrumentation Engineers
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Palabras clave
Fiber optics
Sensors
Head
Modulation
Complex systems
Electromagnetic interference
Resumen/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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