Door operation control apparatus
First Claim
1. A door controller comprising:
- driving means for driving a door curtain between, open and closed positions of a door opening in response to received door operation command signals;
door position encoder means for providing signals indicative of the position of said door curtain relative to said door opening;
timing means for providing timing signals for said controller;
processing means responsive to said encoder means and said timing means for producing representations of door travel speed characteristics; and
memory means coupled to said processing means for storing said representations of said door travel speed characteristics;
wherein, said processing means divides the length of said door opening into a plurality of segments and further sub-divides each of said segments into a plurality of sectors, such that, for each sector, the time for said door curtain to travel a sector is sampled to produce a sampled door travel speed characteristic is compared with a memorized door travel speed characteristic previously stored in said memory means for that sector, an obstruction signal is produced responsive to any difference between said sampled door travel speed characteristics and said memorized door travel speed characteristic exceeding a predetermined value to indicate any obstruction condition, and, provided no obstruction condition is indicated, a running average of said sampled door travel speed characteristic is calculated to provide an updated door travel speed characteristic which is then stored in said memory means as said door travel speed characteristic for that sector.
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Accused Products
Abstract
A door controller for roller type doors is disclosed incorporating a microprocessor control system. The microprocessor measures and stores the door speed over segments of the door travel to generate a door speed travel characteristic. This characteristic enables the door controller to accurately assess obstruction conditions by comparing a real time characteristic with a stored characteristic. The microprocessor also stores electronically the upper and lower limits of door travel. The microprocessor monitors electric motor duty cycle to avoid overheating of the motor and possible burnout while also controlling locking of the drive mechanism when the motor is inoperative. The microprocessor is also used to set the radio control signal code used to activate the door drive mechanism, the setting procedure allows for immediate verification of the set code.
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Citations
16 Claims
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1. A door controller comprising:
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driving means for driving a door curtain between, open and closed positions of a door opening in response to received door operation command signals; door position encoder means for providing signals indicative of the position of said door curtain relative to said door opening; timing means for providing timing signals for said controller; processing means responsive to said encoder means and said timing means for producing representations of door travel speed characteristics; and memory means coupled to said processing means for storing said representations of said door travel speed characteristics; wherein, said processing means divides the length of said door opening into a plurality of segments and further sub-divides each of said segments into a plurality of sectors, such that, for each sector, the time for said door curtain to travel a sector is sampled to produce a sampled door travel speed characteristic is compared with a memorized door travel speed characteristic previously stored in said memory means for that sector, an obstruction signal is produced responsive to any difference between said sampled door travel speed characteristics and said memorized door travel speed characteristic exceeding a predetermined value to indicate any obstruction condition, and, provided no obstruction condition is indicated, a running average of said sampled door travel speed characteristic is calculated to provide an updated door travel speed characteristic which is then stored in said memory means as said door travel speed characteristic for that sector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification