Vibration Monitoring with Fiber Optic Sensor

Many fiber optic sensors have been proposed for both static and dynamic measurements. Recently the authors propose a double-side fiber optic transducer. Dynamic tests were carried out with the sensor fixed at the top of a steel bar mounted on a shaking table. The optical device supplied an output signal directly comparable with the signal given by the accelerometer placed on the top of the bar. This paper illustrates a new series ot tests conducted by arranging two transduction plates with a single V-groove on the two opposite faces of a steel column of a single degree of freedom structural system. The acquired data were compared with the responses of a capacitive accelerometer located on the structure girder and of strain gages glued on the steel columns.