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Circuit for inhibition of autogenetic false alarms in a collision avoidance system

  • US 4,067,010 A
  • Filed: 12/22/1975
  • Issued: 01/03/1978
  • Est. Priority Date: 04/14/1975
  • Status: Expired due to Term
First Claim
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1. A circuit in a probe-reply station of a collision avoidance system for inhibiting autogenetic false alarm signals generated by said station, comprising the combination of:

  • means for transmitting periodic probe signals including means for randomly selectively generating probe signals of different types and transmitting one probe signal of one of said types;

    normally operative probe reply means for transmitting a reply signal in response to received probe signals; and

    means responsive to said probe signal transmitting means indicative of the transmission of a probe signal for inhibiting said normally operative probe reply means from transmitting a reply signal for a predetermined but relatively short period of time following the transmission of each of said transmitted probes;

    wherein said probe reply means includes means for receiving said probe signals, and means responsive to received probe signals for generating a reply signal corresponding to each of said probe signal types; and

    wherein said inhibiting means includes means for inhibiting the transmission of said reply signals that correspond to said one probe signal type.

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