Saw tooth bias modulation and loop closure for an interferometric fiber optic gyroscope
CA 2476758 A1 · Owner: Honeywell International Inc. · Inventors: Lange, Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fiber optic gyroscope with counter-propagating electromagnetic waves in a fiber-optic coil senses rotation about the coil. Such a fiber-optic gyroscope uses a bias modulation to bias the gyroscope on a rate sensitivity portion of the interferogram. Using a saw-tooth wave as the bias modulation results in a system with many advantages over a system modulated by square waves or sinusoidal wave. For example, the system is less sensitive to cross coupling because the drive is significantly different than the detected signal. In addition, the saw tooth waveform can be used in a closed loop scheme with the advantage of a frequency output proportional to the rate and a reduction of …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 19, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2025.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.