Title:
【発明の名称】航空機安全システム
Document Type and Number:
Japanese Patent JPH02500305
Kind Code:
A
Abstract:
An aircraft security system includes a central control unit, several remotely located cluster controllers and a plurality of intrusion sensors associated with and controlled by each cluster controller. A two-wire bus carries power from the central control unit for operating each of the cluster controllers and the sensors, and carries data signals in both directions between the central control unit and the cluster controllers. The two-wire bus reduces weight and installation costs. The system includes an initial calibration mode wherein sensor type information and sensor parameters are sent from the central control unit to each cluster controller. The signal strength from each sensor is then measured and stored in the central control unit. During later operation, the sensor signal strengths are measured and compared with the initial values. If a trouble condition is detected, appropriate corrective action is taken. One corrective action includes varying the transmitted energy until the sensor signal strength is within a prescribed range.
Inventors:
Michael W. Oyer
Gadetes, Argard M
Gadetes, Argard M
Application Number:
JP50570487A
Publication Date:
February 01, 1990
Filing Date:
September 24, 1987
Export Citation:
Assignee:
Shepherd Intelligence Systems Incorporated
International Classes:
B64D45/00; G08B25/00; G08B25/06; G08B26/00; (IPC1-7): B64D45/00; G08B25/00; G08B25/06
Attorney, Agent or Firm:
Kyozo Yuasa (4 outside)
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