Device of suppressing incorrect alarms for use in a collision avoidance system installed in an airplane
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United States of America Patent
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-
Jul 2, 1991
Grant Date -
N/A
app pub date -
May 16, 1989
filing date -
May 16, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device of suppressing incorrect alarms to be issued from an airplane collision avoidance system installed in a first airplane, wherein when it is found that a product obtained by multiplying a relative distance of the first airplane relative to a second airplane by a sine of a relative horizontal angle is constant or when it is found that results derived from a comparison between a relative speed of the first airplane relative to the second airplane and a speed vector in the direction toward the second airplane obtained from a relative horizontal angle of the first airplane relative to the second airplane and a speed of the first airplane in the direction of extension of a nose is substantially zero, it is determined that the second airplane is held in an immovable state, i.e., it stays in a waiting state.
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