Optics: measuring and testing – By light interference – Using fiber or waveguide interferometer
Reexamination Certificate
2007-05-29
2007-05-29
Lee, Hwa (Andrew) (Department: 2886)
Optics: measuring and testing
By light interference
Using fiber or waveguide interferometer
C356S519000, C385S012000
Reexamination Certificate
active
11038093
ABSTRACT:
A fiber optic sensor system for pressure measurements where the design permits multiplexity on the input side of the system and the optical part of the system, which has a sensor Fabry-Perot interferometer and a read-out interferometer, is based on low coherence fiber-optic interferometry techniques. This permits a high dynamic range and low sensitivity to the wavelength fluctuation of the light source as well as to the optical intensity fluctuations. The system includes fiber tip based Fabry-Perot sensors, where each sensor includes a diaphragm as the transducer. A combined pressure gradient sensor, air particle velocity sensor, as well as acoustic intensity sensor is built based on the fiber tip based Fabry-Perot sensors.
REFERENCES:
patent: 4329058 (1982-05-01), James et al.
patent: 4682500 (1987-07-01), Uda
patent: 4755668 (1988-07-01), Davis
patent: 4873989 (1989-10-01), Einzig
patent: 4926696 (1990-05-01), Haritonidis et al.
patent: 5218420 (1993-06-01), Asmar
patent: 5381229 (1995-01-01), Murphy et al.
patent: 5392117 (1995-02-01), Belleville et al.
patent: 5408319 (1995-04-01), Halbout et al.
patent: 5459571 (1995-10-01), Dammann et al.
patent: 5907403 (1999-05-01), Andrews et al.
patent: 6008898 (1999-12-01), Furstenau et al.
patent: 6281976 (2001-08-01), Taylor et al.
patent: 6738145 (2004-05-01), Sherrer et al.
patent: 6925213 (2005-08-01), Boyd et al.
patent: 2003/0112443 (2003-06-01), Hjeime et al.
patent: 2003/0169956 (2003-09-01), Lange et al.
patent: 2004/0047536 (2004-03-01), Pickrell et al.
A. Sampath, et al., “Active Control of Multiple Tones Transmitted in an Enclosure”, Journal of the Acoustical Society of America, vol. 106, No. 1, pp. 211-225, Jul. 1999.
M. Al-Bassyiouni, et al., “Zero Spillover Control of Enclosed Sound Fields”, SPIE's Annual International Symposium of Smart Structures and Materials, Newport Beach, CA, Mar. 4-8, vol. 4362, Paper No. 4326-7, 2001.
M. Al-Bassylouni, et al., “Experiment Studies of Zero Spillover Scheme for Active Structural Acoustic Control Systems”, Proceedings of the 12th International Conference on Adaptive Structures and Technologies (ICAST), University of Maryland, College Park, MD, Oct. 15-17, 2001.
Bucaro J.A., et al., “Fiber Optic Hydrophone”, Journal of Acoustical Society of America, 62, pp. 1302-1304, 1977.
Cole, J.H., et al., “Fiber Optic Detection of Sound”, Journal of Acoustic Society of America, 62, pp. 1136-1138, 1977.
Baldwin, et al., “Bragg Grating Based Fabry-Perot Sensor System for Acoustic Measurements”, Proceedings of the SPIE 1999 Symposium on Smart Structures and Materials, Newport Beach, CA, Mar. 1-5, 1999.
J.W. Parkins, “Active Minimization of Energy Density in a Three-Dimensional Enclosure”, Ph.D. Dissertation. Pennsylvania State University, 1998.
L.E. Kinsler, et al., “Fundamentals of Acoustics”, Second Edition, John Wiley & Sons, Inc., New York, 1962.
B. Balachandran and M. X. Zhao, “Actuator nonlinearities in interior acoustics control,” in Proceedings of SPIE Smart Structures and Materials 2000: Mathematics and Control in Smart Structures, pp. 101-109, Mar. 2000.
C. Hess, “Optical microphone for the detection of hidden helicopters”, AIAA Journal, vol. 30, No. 11, pp. 2626-2631, Nov. 1992.
G. He, et al., “The analysis of noises in a fiber optic microphone”, J. Acoust. Soc. Am., 92 (5), pp. 2521-2526, Nov. 1992.
C. Zhou, et al., “Fiber-optic microphone based on a combination of a Fabry-Perot interferometry and intensity modulation”, J. Acoust. Soc. Am., 98 (2), Pt. 1, pp. 1042-1045, Aug. 1995.
D. Li, et al., “The ring-type all-fiber Fabry-Perot interferometer hydrophone system”, J. Acoust. Soc. Am., 104 (5), pp. 2798-2806, Nov. 1998.
C. Koch, “Measurement of ultrasonic pressure by heterodyne interferometry with a fiber-tip sensor”, Applied Optics, vol. 38, No. 13, pp. 2812-2819, May 1, 1999.
P. Beard, et al., “Characterization of a Polymer Film Optical Fiber Hydrophone for Use in the Range 1 to 20 MHz: A Comparison with PVDF Needle and Membrane Hydrophones”, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 47, No. 1, pp. 256-264, Jan. 2000.
R. Claus, et a., Editors, “Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials”, Proceedings of SPIE, Mar. 1-4, 1999 Newport Beach, California, vol. 3670, pp. 342-351, 1999.
M. Yu, et al., “Fiber Tip Based Fiber Optic Acoustic Sensors”, Twelfth International Conference on Adaptive Structures, Eds. N. Wereley, et al., CRC Press, 245-254, 2001.
Al-Bassyiouni Moustafa
Balachandran Balakumar
Yu Miao
Lee Hwa (Andrew)
University of Maryland
LandOfFree
Fiber tip based sensor system for measurements of pressure... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fiber tip based sensor system for measurements of pressure..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fiber tip based sensor system for measurements of pressure... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3721821