Apparatus for controllng the opening and/or closing of high-speed shutter doors
First Claim
1. A shutter door assembly comprising at least one high speed shutter door and an apparatus for controlling the opening and/or closing of the high speed shutter door, said apparatus comprising means for detecting the presence of an object in a space adjacent the door including a plurality of transmitters position on one side of said space, at least one receiver and a control circuit, said receiver being positioned on a side of said space opposite said transmitters to receive signals from said transmitters, said receiver and all transmitters being arranged to define a triangular area and being connected to said control circuit, said control circuit being operable to deliver signals to said transmitters in alteration where the signals are converted to radiant energy signals for transmission toward said receiver and, when received by said receiver, are delivered by said receiver to said control circuit, which is adapted to generate an evaluation signal, said alteration of transmitted signals being controlled by a clock signal generated by a clock circuit in said control circuit, said control circuit including a frequency evaluating circuit to which said signals are delivered, and said evaluation circuit including a comparator circuit which compares the signals delivered by said receiver to said evaluating circuit and the signals delivered to the transmitters relative to the frequency of said signals and which, in case of a deviation in frequency between a transmitted signal and a received signal, generates a switching signal for controlling movement of the high speed shutter door.
1 Assignment
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Accused Products
Abstract
The apparatus is utilized to detect disturbance created in an opening by objects even when the objects do not move so that they cannot be detected by a motion detector. The apparatus includes a transmitter-receiver apparatus provided at the opening comprising a plurality of arrays, each of which comprises a receiver and a plurality of transmitters. Because divergent beams are emitted by the transmitters, which preferably consist of infrared-emitting diodes, the transmitters and the associated receiver can be arranged to define a triangle in space so that the space of the opening can be completely covered by a plurality of transmitter-receiver arrays. By means of a cyclic signal sequence it is ensured that a signal which has been transmitted is checked in the receiver whether it belongs to the correct transmitter. In order to ensure that high-speed folding shutter doors which are being closed or opened will be controlled so that they move into undisturbed areas, the space in which the movement of the high-speed doors is effected must be protected so timely that an impact on an object protruding into the region of the opening will be prevented in time. For this reason an evaluation signal generated by a control circuit is utilized to operate the door drive in time.
37 Citations
46 Claims
- 1. A shutter door assembly comprising at least one high speed shutter door and an apparatus for controlling the opening and/or closing of the high speed shutter door, said apparatus comprising means for detecting the presence of an object in a space adjacent the door including a plurality of transmitters position on one side of said space, at least one receiver and a control circuit, said receiver being positioned on a side of said space opposite said transmitters to receive signals from said transmitters, said receiver and all transmitters being arranged to define a triangular area and being connected to said control circuit, said control circuit being operable to deliver signals to said transmitters in alteration where the signals are converted to radiant energy signals for transmission toward said receiver and, when received by said receiver, are delivered by said receiver to said control circuit, which is adapted to generate an evaluation signal, said alteration of transmitted signals being controlled by a clock signal generated by a clock circuit in said control circuit, said control circuit including a frequency evaluating circuit to which said signals are delivered, and said evaluation circuit including a comparator circuit which compares the signals delivered by said receiver to said evaluating circuit and the signals delivered to the transmitters relative to the frequency of said signals and which, in case of a deviation in frequency between a transmitted signal and a received signal, generates a switching signal for controlling movement of the high speed shutter door.
- 24. A shutter door assembly comprising at least one high speed shutter door and an apparatus for controlling the opening and/or closing of the high speed shutter door, said apparatus comprising means for detecting the presence of an object in a space adjacent the door, including a plurality of transmitters position on one side of said space, at least one receiver and a control circuit, said receiver being positioned on a side of said space opposite said transmitters to receive signals from said transmitters, said receiver and all transmitters being arranged to define a triangular area and being connected to said control circuit, said control circuit being operable to deliver signals to said transmitters in alteration where the signals are converted to radiant energy signals for transmission toward said receiver and, when received by said receiver, are delivered by said receiver to said control circuit, which is adapted to generate an evaluation signal, said alteration of transmitted signals being controlled by a clock signal generated by a clock circuit in said control circuit, said control circuit including an amplitude evaluating circuit to which said signals are delivered, and said evaluation circuit including a comparator circuit which compares the signals delivered by said receiver to said evaluating circuit and the signals delivered to the transmitters relative to the amplitude of said signals and which, in case of a deviation in amplitude between a transmitted signal and a received signal, generates a switching signal for controlling movement of the high speed shutter door.
Specification
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- Resources
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Current AssigneeEfaflex Transport-Und Lager Technik GmbH
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Original AssigneeEfaflex Transport-Und Lager Technik GmbH
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InventorsRejc, Gabriel
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Primary Examiner(s)Nelms, David C.
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Assistant Examiner(s)Allen, Stephone B.
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Application NumberUS07/012,247Time in Patent Office904 DaysField of Search250/221, 250/222.1, 250/57.3, 340/555-557, 340/630US Class Current250/221CPC Class CodesE05F 15/43 responsive to disruption of...E05F 15/73 responsive to movement or p...E05Y 2900/132 DoorsE05Y 2900/146 Shutters
