Pilot's aid for detecting power lines

摘要

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.