Collision avoidance system of aircraft
First Claim
1. In a collision avoidance system for aircraft equipped with transponders which transmit response signals to interrogations from interrogating aircraft, means within the interrogating aircraft operative on receipt from an interrogated aircraft of response signals which contain information denoting a threat condition for indicating to the interrogating aircraft pilot, as a beacon based collision avoidance indication, a direction to navigate to avoid collision, and means within the interrogating aircraft operative on receipt from the interrogated aircraft or response signals from which desired elevation information is absent for automatically switching from said beacon based collision avoidance indication to a beacon based proximity warning indication for indicating one or more of (a) the distance between the interrogating and the interrogated aircraft, (b) the approaching speed of the aircraft, (c) time to collision or (d) relative flying direction.
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Accused Products
Abstract
A collision avoidance system for aircraft using an on-board beacon interrogator. If altitude information is not included in a response signal from a transponder of an other aircraft or the response signal is garbled because a plurality of other aircraft are responding to the same interrogation signal, the system automatically switches to a beacon based proximity warning system and indicates the distance or other indication to the detected aircraft.
54 Citations
6 Claims
- 1. In a collision avoidance system for aircraft equipped with transponders which transmit response signals to interrogations from interrogating aircraft, means within the interrogating aircraft operative on receipt from an interrogated aircraft of response signals which contain information denoting a threat condition for indicating to the interrogating aircraft pilot, as a beacon based collision avoidance indication, a direction to navigate to avoid collision, and means within the interrogating aircraft operative on receipt from the interrogated aircraft or response signals from which desired elevation information is absent for automatically switching from said beacon based collision avoidance indication to a beacon based proximity warning indication for indicating one or more of (a) the distance between the interrogating and the interrogated aircraft, (b) the approaching speed of the aircraft, (c) time to collision or (d) relative flying direction.
- 4. In a collision avoidance system for aircraft equipped with transponders which transmit response signals to interrogations from interrogating aircraft, means within the interrogating aircraft operative on receipt from an interrogated aircraft of said response signals for indicating to the interrogating aircraft pilot, as a beacon based collision avoidance indication, a direction to navigate to avoid collision, and means within the interrogating aircraft operative on receipt from a plurality of transponders in interrogated aircraft of response signals having framing pulses, within which the respective response signals are superposed, for automatically switching from said beacon based collision avoidance indication to a beacon based proximity warning indication for indicating one or more of (a) the distance between the interrogating and the interrogated aircraft, (b) the approaching speed of the aircraft, (c) time to collision or (d) relative flying direction.
Specification