Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-01-31
1992-09-15
Coles, Sr., Edward L.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359143, 359179, 25022721, H04B 1000
Patent
active
051483033
ABSTRACT:
A fiber optic sensing apparatus is provided to measure the relative reflections of two temporarily displaced signals. One of the signals is a reference signal and the other signal represents the magnitude of a sensed variable. A reference mirror is disposed at a preselected position along an optical fiber between a transmitter/receiver and a sensor mirror. The transmitter provides an energy pulse into a first end of the optical fiber. When the energy pulse encounters the reference mirror, a first portion of the energy pulse is reflected back toward the receiver which is located at the first end of the optical fiber. The remaining portion of the energy pulse continues toward the sensor mirror. A second portion of the energy pulse is reflected by the sensor mirror. The second portion is of a magnitude that is analogous to the sensed parameter. Fiber optic delay lines are provided between the reference mirror and the transmitter/receiver and also between the reference mirror and the sensor mirror. The delayed lines separate the reference pulse and signal pulse from other pulses which are caused by reflections at other components within the optical fiber, such as bulkhead connectors.
REFERENCES:
patent: 4356396 (1982-10-01), Ruell et al.
patent: 4857727 (1989-08-01), Lenz et al.
patent: 4931636 (1990-06-01), Higgens
patent: 4958929 (1990-09-01), Kondo
patent: 4995697 (1991-02-01), Adamovsky
Artile "Optical-fiber sensors challenge the competition" Sep. 1986 published in IEEE Spectrum, author-Giallorenzi et al.
Article: "A Fiber Optic Sensing System Based on Spectral Modulaton" Oct. 13-16 ISA 86 Conference, author, Saaski et al.
Paper: "Optically Powered Sensors A Systems Approach to Fiber Optic Sensors" dtd. Apr. 24, 1987 author Bjork and Lenz.
Article: published Nov. 11, 1982 in Electronics Letters entitlted "Fibre-Optic Variable Delay Lines" authors, Bowers et al.
Thesis by Robert Eugene Larson entitlted "Universal Signal Processing Method for Multimode Reflective Sensors" Dec. 1988.
Article: "An Interview with Alan Harmer on Fiber Optics, Sensors, and Emerging Markets" Jun. 1987 edition of Optical Engineering Reports.
Article: entitled "Fiber Optic Sensors Offer Advantages for Aircraft" appeared Jun. 1987 issue of Optical Engineering Reports, author: Lewis.
Barares Rafael
Coles Sr. Edward L.
Honeywell Inc.
Rubow Charles L.
LandOfFree
Delay line fiber optic sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Delay line fiber optic sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delay line fiber optic sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-741149