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Helicopter obstacle detector

  • US 4,737,788 A
  • Filed: 04/04/1985
  • Issued: 04/12/1988
  • Est. Priority Date: 04/04/1985
  • Status: Expired due to Fees
First Claim
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1. An obstacle detector for helicopters and the like having rotary blades, said detector comprising a pulsed Doppler radar including a processor for received radar signals having a plurality of range channels, each range channel including an in-phase and a quadrature channel and each in-phase and quadrature channel including overlapping integrators connected to integrate signals processed by said range channels and staggered so that integration periods overlap, and said radar further having a directional transmitting and receiving antenna mounted adjacent the outermost tip of one of said rotary blades so that the sensitive direction of said antenna is positioned generally parallel to the direction of movement of the outermost tip.

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