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US Patent 5035511 - Distributed fiber optic temperature sensor based on time domain transmission
US Patent Issued on July 30, 1991
Estimated Patent Expiration Date:
April 10, 2010Estimated 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:
April 10, 2010Estimated 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.AbstractAn apparatus and method for sensing temperature of a surface comprises a plurality of time domain intensity transmission networks. Each network comprises pairs of fiber optic power dividers which are connected to each other by bridges. One power divider in each pair is connected in a series by delay lines that form an output bus for propagating a light pulse supplied to an initial power divider in the output bus. This produces a train of light pulses which are returned to a light detector by a receiving bus which interconnects the power dividers at the opposite end of each bridge. Each power divider is in thermal contact with the surface whose temperature is to be measured and the intensity of the train of light pulses is changed in accordance with changes in the temperature of the surface.Other References
| InventorApplicationNo. 507325 filed on 04/10/1990US Classes:374/124, With scanning or temperature distribution display250/227.12, Optical delay line374/131, With radiation conducting element374/137Temperature distribution or profileField of Search374/124, With scanning or temperature distribution display374/131, With radiation conducting element374/137, Temperature distribution or profile374/166, At plural zones374/167, Scanning250/227.12, Optical delay line356/73.1, FOR OPTICAL FIBER OR WAVEGUIDE INSPECTION356/43OPTICAL PYROMETERSExaminersPrimary: Cuchlinski, William A. Jr.Assistant: Gutierrez, Diego Attorney, Agent or FirmUS Patent References4297656, Plural frequency oscillator employing multiple fiber-optic delay lineIssued on: 10/27/1981 Inventor: Pan4326798, Pyrometer system using separated spectral components from a heat source Issued on: 04/27/1982 Inventor: Kahn4671604, Wavelength dependent, tunable, optical time delay system for electrical signals Issued on: 06/09/1987 Inventor: Soref4830513, Distributed temperature sensor with optical-fiber sensing element Issued on: 05/16/1989 Inventor: Grego4878226, Multiple point remote temperature sensing Issued on: 10/31/1989 Inventor: McQuoid, et al.4916643System for remote sensing of a physical parameter Issued on: 04/10/1990 Inventor: Ziegler, et al. Foreign Patent References
International ClassG01K 011/00 |
