| 摘要 |
1,207,951. Navigation. J. R. NARBAITSJAUREGUY. 19 May, 1965 [23 June, 1964], No. 21280/65. Heading H4D. A system for navigating and landing an aerodyne in conditions of darkness and described as applied to a helicopter comprises an ultrasensitive T.V. camera 8 mounted on the aircraft and movable about two mutually perpendicular axes x, y on a bracket 10, this camera producing an image on a video monitor 7 disposed in front of the pilot. The line of observation 16 of the camera may be stabilized in space in a selected direction by appropriately setting knobs 13, 14, 15 controlling gyroscopic stabilizing equipment 11. In order to land the aircraft the image of the selected landing area is first brought into the centre of the video monitor 7 by operating the knobs 13, 14, 15 and the pilot then operates the flying controls to cause the aircraft to descend such that the image remains in the centre of the monitor screen. The distance to the ground may be judged by comparing images of known objects, e.g. trees, houses, with graduated scales on the screen. In an alternative distance measuring arrangement, Fig. 5 (not shown), a pair of infra-red light sources 18, 19 are provided on the aircraft and are stabilized by the equipment 11 to be parallel with the line of observation 16, the images of the two spots 23, 24 produced on the ground 22 by the light beams 20, 21 being read directly on a scale of the monitor screen 7. |
