COLLISION RISK PREVENTION EQUIPMENT FOR AIRCRAFT
First Claim
1. An equipment, for aircraft, for anticipating collision risks comprising:
- an SSR secondary surveillance radar transponder supporting a data transmission channel, an SSR interrogator adapted to an SSR transponder and a computing unit provided with means for managing the SSR transponder and the SSR interrogator, estimation means for estimating the relative distances and bearings of the aircraft responding to the requests of the SSR interrogator, wherein the computing unit comprises;
SSR interrogator request specifying means specifying requests for communication of estimated relative distance and/or of estimated relative bearing, SSR transponder response specifying means for making it possible, on the request of an SSR interrogator of another aircraft flying in the vicinity, to include in the response given by the SSR transponder of the aircraft, a value of relative distance and/or of relative bearing provided by the estimation means, said specific requests and responses being carried by the data transmission channel, Concordance checking means for checking the concordance between the relative distance value and/or the relative bearing value of an aircraft provided by the estimation means and the value of relative distance and/or of relative bearing communicated by that aircraft by means of its SSR transponder and discordance alarm means triggered in the case of discordance detected by the discordance checking means.
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Accused Products
Abstract
This equipment is of the TCAS type. In order to improve its integrity and the reliability of its measurements, its computing unit is provided with a cross-checking function carrying out the comparison between two values of a same parameter, for example a relative distance with respect to an intruder, one of them generated by its own estimating means and the other communicated by another TCAS equipment installed on the intruding aircraft and generating a discordance alarm in the case of the observed difference exceeding a tolerance threshold. The computing unit is provided with fault locating means locating the aircraft whose TCAS is faulty when in the presence of several intruding aircraft, by examining the observed differences in pairs of values of a same parameter established for each intruding aircraft.
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Citations
7 Claims
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1. An equipment, for aircraft, for anticipating collision risks comprising:
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an SSR secondary surveillance radar transponder supporting a data transmission channel, an SSR interrogator adapted to an SSR transponder and a computing unit provided with means for managing the SSR transponder and the SSR interrogator, estimation means for estimating the relative distances and bearings of the aircraft responding to the requests of the SSR interrogator, wherein the computing unit comprises;
SSR interrogator request specifying means specifying requests for communication of estimated relative distance and/or of estimated relative bearing, SSR transponder response specifying means for making it possible, on the request of an SSR interrogator of another aircraft flying in the vicinity, to include in the response given by the SSR transponder of the aircraft, a value of relative distance and/or of relative bearing provided by the estimation means, said specific requests and responses being carried by the data transmission channel, Concordance checking means for checking the concordance between the relative distance value and/or the relative bearing value of an aircraft provided by the estimation means and the value of relative distance and/or of relative bearing communicated by that aircraft by means of its SSR transponder and discordance alarm means triggered in the case of discordance detected by the discordance checking means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification