Control for the drive of an object movable to and fro between two end positions
US5874819A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | May 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45242
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control system for an electrical motor drive for moving a door between end positions. The two end positions are detected by the control system, and an increment detector associated with the motor drive reproduces the movement cycle of the door. A stop associated with the motor drive marks an end position of the door that corresponds to the open position thereof. This open position is treated as a reference point. A pulse storage device is set to a specific value at this reference point and initiates the beginning of a pulse sequence to reproduce movement of the object between the end positions. The pulse sequence is compared for coincidence with pulses produced by the increment detector upon movement of the door into the opposite end position that corresponds to its closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.