Title :
Fiber-optic extrinsic Fabry-Perot interferometer vibration sensor with two-wavelength passive quadrature readout
Author :
Fürstenau, Norbert ; Schmidt, Markus
Author_Institution :
Inst. of Flight Guidance, German Aerosp. Res. Establ., Braunschweig, Germany
Abstract :
A new fiber-optic extrinsic Fabry-Perot microinterferometer cantilever beam type vibration sensor (EFPI-V) is described. For eliminating signal fading effects a two-wavelength demodulation scheme is implemented. 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 defection via monitoring of structural vibrations demonstrate the application as traffic sensor
Keywords :
Fabry-Perot interferometers; air traffic control; airports; demodulation; eigenvalues and eigenfunctions; fibre optic sensors; surveillance; vibration measurement; acoustic range; airport; cantilever beam type; eigenfrequency spectrum; extrinsic Fabry-Perot interferometer; fiber-optic sensor; ground traffic surveillance system; microinterferometer; signal fading effects; structural vibrations; traffic sensor; two-wavelength demodulation scheme; two-wavelength passive quadrature readout; vehicle detection; vibration sensor; Acoustic sensors; Acoustic testing; Demodulation; Fabry-Perot interferometers; Fading; Optical fiber sensors; Optical fiber testing; Sensor phenomena and characterization; Structural beams; Traffic control;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.604022
