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:
May. 18, 2004
Filed:
Dec. 26, 2002
Other;
Abstract
In the disclosure, MR sensors and for detecting the periodical angle position of rotating members rotating in conjunction with a steering wheel shaft are disposed in the vicinity of rotating members. These MR sensors are connected with a CPU , which makes the operation/processing of data from the MR sensors to calculate an absolute steering angle, including the indication of how many times the wheel has turned (periodicity). When the ignition key is turned off, the CPU changes its operation mode into a stop mode of suspending said operation/processing, after storing the periodicity and the angle position &ggr; of the rotating members in a flash memory. If any steering has been done during the stop mode to a degree that the output voltage of the MR sensor exceeds the standard voltage V ref, the comparator s output conditions change and the CPU temporarily releases the stop mode to calculate a value to correct the periodicity, using the angle positions at the start of stop mode and at its release, and correct the periodicity with this value.