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:
Nov. 27, 1990
Filed:
Jan. 27, 1989
Paul B Patton, Rockford, MN (US);
Kenneth B Kidder, Coon Rapids, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A method and apparatus determine signal quality of AC input signals to a control system where the AC input signals and an AC system signal are phase-synchronous. A read cycle, for reading the AC input signals, is scheduled to be performed during periodic cycles of the AC system signal. The presence or absence of the AC system signal is determined. A number of good read cycles are counted where the good read cycles represent the read cycles performed when the AC system signal is present. A ratio is determined between the number of good read cycles counted during a predetermined time and a total number of read cycles scheduled to be performed during the predetermined time.