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US Patent 7224465 - Fiber tip based sensor system for measurements of pressure gradient, air particle velocity and acoustic intensity
US Patent Issued on May 29, 2007
Estimated Patent Expiration Date:
January 21, 2025Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
January 21, 2025Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA 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.Other References
| InventorsAssigneeApplicationNo. 11038093 filed on 01/21/2005US Classes:356/480, Resonant cavity356/519, Having partially reflecting plates in series (e.g., Fabry-Perot type)385/12, OPTICAL WAVEGUIDE SENSOR73/705PhotoelectricField of Search356/478, Multiplexed sensor array356/480, Resonant cavity356/519, Having partially reflecting plates in series (e.g., Fabry-Perot type)356/477, Using fiber or waveguide interferometer356/506, Fabry-Perot type385/12OPTICAL WAVEGUIDE SENSORExaminersPrimary: Lee, Hwa (Andrew)Attorney, Agent or FirmUS Patent References4329058, Method and apparatus for a Fabry-Perot multiple beam fringe sensorIssued on: 05/11/1982 Inventor: James , et al.4682500, Pressure sensitive element Issued on: 07/28/1987 Inventor: Uda4755668, Fiber optic interferometric thermometer with serially positioned fiber optic sensors Issued on: 07/05/1988 Inventor: Davis4873989, Fluid flow sensing apparatus for in vivo and industrial applications employing novel optical fiber pressure sensors Issued on: 10/17/1989 Inventor: Einzig4926696, Optical micropressure transducer Issued on: 05/22/1990 Inventor: Haritonidis, et al.5218420, Optical resonance accelerometer Issued on: 06/08/1993 Inventor: Asmar5381229, Sapphire optical fiber interferometer Issued on: 01/10/1995 Inventor: Murphy, et al.5392117, Fabry-Perot optical sensing device for measuring a physical parameter Issued on: 02/21/1995 Inventor: Belleville, et al.5408319, Optical wavelength demultiplexing filter for passing a selected one of a plurality of optical wavelengths Issued on: 04/18/1995 Inventor: Halbout, et al.5459571, Multiple control frequency phase modulator in phase modulated interferometer precision distance measuring system Issued on: 10/17/1995 Inventor: Dammann, et al.5907403, Optical dual Fabry-Perot interferometric strain/temperature sensor, and system for separate reading thereof Issued on: 05/25/1999 Inventor: Andrews, et al.6008898, Method and apparatus for measuring acceleration and vibration using freely suspended fiber sensor Issued on: 12/28/1999 Inventor: Furstenau, et al.6281976, Fiber optic fiber Fabry-Perot interferometer diaphragm sensor and method of measurement Issued on: 08/28/2001 Inventor: Taylor, et al.6738145, Micromachined, etalon-based optical fiber pressure sensor Issued on: 05/18/2004 Inventor: Sherrer, et al.6925213Micromachined fiber optic sensors Issued on: 08/02/2005 Inventor: Boyd, et al. International ClassG01B 9/02 |
