Toyo Communication Equipment Co., Ltd.

Chuhei Funatsu

Kazuyuki Kita

The present invention is concerned with a system in which when the altitude of a subject aircraft becomes lower than a predetermined altitude, a warning limit value is reduced or made equal to zero on the minimum altitude side whereby a useless alarm based on response signals delivered from other aircraft staying in or taxiing in the airport are suppressed.

System of an aircraft collision avoidance system for suppressing useless

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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Kanagawa, Japan

Chuhei Funatsu