Calibration method for a relative heading sensor
CA 2135383 C · Owner: Kao, Wei-Wen · Inventors: Kao, Wei-Wen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a direction sensor and a method of calibrating a direction sensor having a relative heading sensor (14) and an absolute heading sensor (16). The method allows calibration (22) of both the relative heading sensor (14) and the absolute heading sensor (16) at the same time, by taking advantage of the known angular relationship between maxima and minima on the, measurement curve of the absolute heading sensor (16). Such maxima and minima are found by rotating the sensors (12-18) through and angle of at least 360°, reading the absolute and relative heading. sensor outputs. at numerous points and comparing each, successive output. The relative heading sensor output at the …
Read the whole patent
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 May 12, 1993 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.