Control system for vertical storage equipment
US4650264A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1984 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Dec 10, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50084
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control system for vertical storage equipment requires only two sensing devices, in combination with a microprocessor controller, for positioning a selected article carrier at a specified work station. One sensor senses a reference mark having a direct speed and position relation with the carriers. The second sensor senses at least one reference mark mounted to a high speed member in the drive mechanism used to move the carriers. By sensing the high speed member, the resolution of the control system is greatly increased, thereby providing the control system with increased accuracy and versatility. A flywheel having a relative inertia greater than the total of the remaining moving parts is preferably employed to negate the influence of carrier loading conditions on control system smoothness and accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.