Automatic mirror repositioning system diagnostics
US5194789A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Aug 2, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/909
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A memory mirror system having a mirror 19, two constant speed motors 16,18 each controlling an axis of mirror movement, position feedback signals 26,28 from each motor, switch inputs 12, a diagnostic push button 40, and an electronic controller 10, is provided with a diagnostic procedure after a self-test push button 40 has been depressed by automatically driving the mirror to the center of movement when manual movement is not requested, thereby allowing system level failures, such as position feedback sensor failures, to be detected quickly by visual inspection of mirror movement as the mirror attemps to return to the origin, without altering existing memory settings or disconnecting the controller 10 from the system. When manual movement is not requested for a predetermined period of time, the diagnostic procedure is prevented from running.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.