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

Volume

47

Issue

1

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

143

Lastpage

147

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.728807

Filename

728807