System and method for controlling activating actuator motors for various mechanisms, such as roller shutters, awnings and movies screens
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United States of America Patent
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-
Apr 10, 2001
Grant Date -
N/A
app pub date -
Nov 13, 1995
filing date -
Nov 14, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and system for detecting a predefined level of resistance in motor activated drive systems for activating devices such as roller shutters, rolling gates, jalousies, awnings and movie screens in a predetermined direction or path. The method includes means for sensing predetermined characteristics of the electric motor when the electric motor is activated to move the drive in the predetermined path and detecting a predefined change in the motor characteristics due to the blockage or resistance. The electric motor is deactivated when a predefined level of resistance is detected along the predetermined path which blocks movement of the drive by the electric motor in the predetermined direction for a predetermined time period. The drive is a tubular slide-in drive, wherein the electronic components including the micro controller which is necessary for controlling the stopping is provided within the tubular, and wherein the roller shaft comprises a mechanical play within the tubular slide-in drive of approximately
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