Communications: electrical – Aircraft alarm or indicating systems – Land-based landing guidance
Patent
1996-06-21
1999-07-20
Swarthout, Brent A.
Communications: electrical
Aircraft alarm or indicating systems
Land-based landing guidance
315130, 340642, 340933, B64F 118
Patent
active
059261153
ABSTRACT:
A microprocessor-controlled airfield series lighting circuit communications system and method allows bi-directional communication between the controlling microprocessor and the airfield lamps. The bi-directional communications signals are formed by using a modulated radio-frequency signal that is transmitted through a circuit containing many transformers having their primary windings connected in series. Respective secondary windings of the transformers are connected to various devices, such as lamps or sensors. A high frequency signal is imposed on the series-connected primary windings to control the lamps. The frequency of this signal is selected to be able to be detected on the secondary side of the transformer. A remote controller is connected to the secondary of each transformer to receive the control signal and selectively switch power obtained from the transformer secondary to the respective connected device. Any one of the multiple controllers can be configured as a repeater for any other one of the controller. As a repeater, the controller receives a control message addressed to a target controller and retransmits the message to the target controller.
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Hyde Shawn M.
Schleder William E.
ADB Alnaco, Inc.
Swarthout Brent A.
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