The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2007
Filed:
Sep. 26, 2005
Masashi Saito, Novi, MI (US);
Brian Wightman, Davisburg, MI (US);
Masashi Saito, Novi, MI (US);
Brian Wightman, Davisburg, MI (US);
Hitachi Automotive Products (USA), Inc., Harrodsburg, KY (US);
Abstract
A method for determining the absolute angle of an angle position sensor over a predetermined rotation range and in which the sensor generates a repeating periodic analog signal across the rotation range. The initial position of the sensor is stored in memory when the sensor is in a predetermined initial angular position. Thereafter, the angular position of the sensor within the rotation range is determined as a function of both the sensor output signal and the stored angular position of the sensor. The current position of the sensor is iteratively stored in memory. Additionally, the sensor output is calibrated by dividing the sensor output into a plurality of arc segments across the rotation range. A polynomial curve fit is then applied to each arc segment to determine the calibration for the sensor and this calibration data is subsequently utilized to provide a signal representative of the absolute angle of the position sensor over the rotation range.