Control apparatus for hydraulic elevators using fuzzy logic and speed control
US5266756A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1991 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Mar 7, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/285
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A control apparatus for hydraulic elevators, including: a flow control valve for controlling the amount of oil in a hydraulic jack; a sensor device for detecting at least one of oil temperature and load pressure and producing corresponding input data; a correcting rule storing device for storing correcting rules of control instruction values corresponding to input data from the sensor device; a fuzzy reasoning processor for calculating control instruction values as fuzzy values from the input data and the correcting rules; a speed pattern correcting circuit for correcting the control instruction values based on the fuzzy values calculated by the fuzzy reasoning processor; and a speed controlling device for supplying the corrected control instruction values to the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.