Wire obstacle avoidance system for helicopters

Details Wire obstacle avoidance system for helicopters Wire obstacle avoidance system for helicopters

1988-02-09

1990-02-20

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

180169, 356152, G01C 308

Patent

active

049021265

ABSTRACT:
An improved wire detection and avoidance system for helicopters is characterized by the use of a solid state laser transmitter which emits radiation in the near infrared wavelength region. Using either a beam dividing device or a plurality of laser diode arrays, separate laser beam lobes are generated which are passed through optical lenses for deflection in slightly different directions to define a field of coverage. A wire obstacle in the field of coverage intercepts one or more of the lobes and reflects return signals thereof to a receiver detector array. The return signals are compared with the transmitted laser lobes, with the difference therebetween being a function of the range between the obstacle and the helicopter. The range information is displayed to the pilot who then takes evasive action to avoid striking the obstacle.

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patent: 4721385 (1988-01-01), Jelalian et al.
patent: 4748469 (1988-05-01), Tamura

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