Method and apparatus for monitoring and controlling linear motor robot apparatus and the like
US5081593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1989 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Aug 16, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/4062
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A technique for preventing a stalled linear motor device from damage including monitoring accelerometer servos which generate signals representative of the difference between a command acceleration signal controlling the linear motor and the actual acceleration experienced by the linear motor device which signal represents the acceleration error and the direction of the error. The different signal is compared against programmed limits to develop a break-loose signal when the programmed limit (positive or negative) is exceeded. The break-loose signal is monitored as to duration, which duration is preprogrammed according to the dynamics of the system specifications presently in use. In the event that the break-loose signal exceeds the preprogrammed time limit, a latch is set, generating an interrupt signal applied to the computer control which immediately removes all motive power from the system and tests the latch to determine the source of the error, the latch remaining in the set state awaiting the computer test and being reset only after recognition by the computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.