Title :
Interferometer vibration sensor with two-wavelength passive quadrature readout
Author :
Fürstenau, Nobert ; Schmidt, Markus
Author_Institution :
Inst. of Flight Guidance, Aerosp. Res. Establ., Braunschweig, Germany
fDate :
2/1/1998 12:00:00 AM
Abstract :
A new fiber-optic extrinsic Fabry-Perot microinterferometer (cantilever beam type) vibration sensor (EFPI-V) is described. A two-wavelength demodulation scheme is implemented for eliminating signal fading effects. The theoretical model of this sensor with pronounced eigenfrequency spectrum in the acoustic range is confirmed by experimental results. Initial field tests in an experimental airport ground traffic surveillance system for vehicle detection via monitoring of structural vibrations demonstrate the application as traffic sensor
Keywords :
Fabry-Perot interferometers; airports; demodulation; fading; fibre optic sensors; ground support equipment; interference suppression; traffic control; vibration measurement; EFPI-V; Fabry Perot interferometer; airport ground traffic surveillance; cantilever beam; eigenfrequency spectrum; field tests; interferometer vibration sensor; monitoring; signal fading effects; structural vibrations; theoretical model; traffic control; traffic sensor; two-wavelength demodulation; two-wavelength passive quadrature readout; vehicle detection; Acoustic sensors; Acoustic testing; Demodulation; Fabry-Perot; Fading; Optical fiber sensors; Optical fiber testing; Sensor phenomena and characterization; Structural beams; Traffic control;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
