METHOD OF ENSURING HELICOPTER FLIGHT AND LANDING SAFETY AND DEVICE FOR REALISING SAID METHOD Russian patent published in 2010 - IPC G01S13/93 

FIELD: physics, navigation.

SUBSTANCE: invention relates to optical-location techniques and can be used to ensure helicopter flight and landing safety. The invention involves reception of information on direction and distance to obstacles in an all-round surveillance zone through emission of a set of optical transmitters in a flat 360° angle in the plane perpendicular the vertical axis of the helicopter, reception of the optical signal reflected by an obstacle located in the reception sector, processing the signal together with signals coming from modulators of the optical transmitters, determination of distance and sectors for receiving signals from the obstacle by comparing signals from optical receivers and modulators, generation of light and audio signals based on that information to notify the pilot in the direction and distance to the obstacle. Three distances to the obstacle are selected first. Approach of the helicopter to the obstacle is analysed while determining the flight time of the helicopter through two given distances to the obstacle. A forecast time interval before instructing the pilot to "turn away" relative the second given distance is generated. A "turn away" instruction is given when the helicopter flies through a third given distances. The current vertical landing speed value of the helicopter is compared with a given value. Information on the vertical landing speed of the helicopter and on its overshooting the given value is given out.

EFFECT: increased information content.

3 cl, 3 dwg