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:
Jul. 12, 1988
Filed:
Jul. 24, 1986
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A positioning control device wherein an abnormality in a position detector is judged only by use of two position signals having differing phases emitted from the position detector for effecting position detection of a movable article without using the data of movement of the movable article to be controlled. For this purpose, direction determining means are provided which are responsive to the position signals to provide normal or reverse direction signals. A logical circuit for effecting abnormality judging of the position detector is provided in a controller for emitting a position control signal corresponding to the position signal to a control circuit for effecting position control of the movable article. When an abnormal condition occurs in the position detector, the signal aspect of the position signal emitted from the position detector is varied from that during the normal operation.