Torpedo seeker head having directional detection independent of

Details Torpedo seeker head having directional detection independent of Torpedo seeker head having directional detection independent of

1999-07-06

2000-08-22

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367129, 367153, 114 213, G01S 380, F42B 1901, H04R 1700

Patent

active

061082708

ABSTRACT:
A torpedo seeker head for providing guidance information in three orthogonal axes is provided according to the invention. The torpedo seeker head includes three directional hydrophones, with each directional hydrophone capable of receiving an acoustic signal and generating a signal output therefrom. The three directional hydrophones are aligned with their response axes oriented substantially orthogonally, with any two directional hydrophones and respective axes defining a plane. An omni-directional hydrophone is also provided which measures a phase of a received acoustic signal. The signal outputs from the any two directional hydrophones, in conjunction with the phase from the omni-directional hydrophone are used to calculate a look angle to a target in a plane defined by the any two hydrophones, with the measurement being substantially independent of frequency. The three directional hydrophones yield look angles in three dimensions. The torpedo seeker head utilizes this information to provide guidance information to the torpedo.

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