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:
Jun. 02, 1992
Filed:
May. 31, 1990
Yorihisa Yamamoto, Shiki, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for detecting malfunctioning of a digital computer of a control device which repetitively processes a main routine and, at each predetermined timing, interrupts the processing of the main routine in order to process at least one interruption routine. The method includes the steps of (a) changing the contents of a first stored data after a predetermined plurality of consecutive interrupt routines are executed, (b) setting a second stored data equal to the first stored data in processing the main routine, (c) outputting the second stored data as a signal from the digital operating circuit in processing the interruption routine, and (d) identifying a malfunction by detecting whether the contents of the second stored data outputted from the circuit remain constant for a time longer than a second predetermined time.