Fiber Sensing System
Each Fiber Bragg Grating (FBG) has a distinctive wavelength – not so unlike the distinct resonant frequency of a mechanical component.
Strain affects the FBG’s wavelength (not so unlike how strain affects the natural frequency of a mechanical component)
The interrogator and associated software have the ability to precisely measure the FBG’s wavelength.
By knowing how temperature and displacement affect the FBG’s wavelength, precise wavelength measurements can be utilized to determine temperature and motion of components..
Fiber Bragg Gratings (FBG) sensor systems comprising optoelectronic interrogators supporting FBG arrays that can: form multiple sensors on one or multiple optical fibers simultaneously through wavelength division and other multiplexing techniques provide info regarding dynamic strain, vibration & temperature provide basis for monitoring generator health state