This paper presents an overview of past, present, and future uses of fiber optic sensors and systems in the power generation industry. The evolution of fiber optic sensors is discussed pertaining to monitoring of power generators.
An in-situ Dynamic Measuring System is developed and tested to measure the vibratory and translational displacement
of the airfoil modes of a combustion turbine compressor vane via an optical non-contact method. The Dynamic
Measurement System measures the dynamic contact displacement in the radial direction of the combustion turbine,
which can be implemented as measurement of radial displacement on the axial contact surface. The dynamic system is a
non-contact device that uses a fiber optic bundle for the sensor element probe. The probe's fibers are connected to a
module which in turn plugs into the display controller. The probe is placed in proximity of the target area. Motion of the
target is determined by the amount of light received by the probe. The fiber bundle system is capable of simultaneous
measurement of vibratory (AC) motion and free body or translational (DC) motion. The AC modes are resolved
spectrally by an FFT of the raw fiber optic bundle signal. The fiber optic bundle correctly identified the modes and their
associated magnitude on the airfoil and measured the displacement of the target area.