Communications: electrical – Aircraft alarm or indicating systems – Flight alarm
Patent
1998-09-18
1999-12-14
Hofsass, Jeffery A.
Communications: electrical
Aircraft alarm or indicating systems
Flight alarm
340945, 340946, 340964, G08B 2300
Patent
active
060023481
ABSTRACT:
An airborne power line detector and warning system includes a low frequency radio and antenna for detecting an AC signal of about 50 to 60 hertz. The system also includes a subsystem for producing a unique audio signal such as a series of clicks for warning a pilot that he is flying close to one or more power lines. In addition, the system includes a mute feature for muting the audio signal and replacing it with a visual signal. Finally, the system includes a gain sensor for replacing the audio signal at any time that the helicopter reduces its distance to a power line. An airborne power line detection and warning system which includes a second system or back up system is also disclosed. That system includes a GPS receiver and GIS data base to position a helicopter with respect to a power line grid and sound an alarm when the helicopter approaches a power line.
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Greene Leonard M.
Greene Randall A.
Hofsass Jeffery A.
Pham Toan
Safe Flight Instrument Corporation
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