Auxiliary flight instrument
阅读：890发布：2020-10-02
专利汇可以提供Auxiliary flight instrument专利检索，专利查询，专利分析的服务。并且Auxiliary flight instrument, particularly a blind flying instrument comprising a rotating member bearing on one of its surfaces a pattern which through a stroboscopic effect is either visible or invisible depending on the rotation speed of said member, said pattern being devised so as to provide the pilot, when lacking exterior visual references, with a reflex-prompting display under blind flying conditions similar to when visual piloting conditions obtain.，下面是Auxiliary flight instrument专利的具体信息内容。
1. Auxiliary flight instrument, particularly a blind flying instrument comprising at least two adjacently positioned side by side rotating members bearing on a surface of each a pattern of contrasting lines having at least lines substantially transverse to the direction of rotation which lines aRe visible during slower speeds of rotation but invisible during faster speeds of rotation of said members through stroboscopic effect, said pattern providing the pilot, when lacking exterior visual references, with a reflex-prompting display under blind flying conditions similar to when visual piloting conditions obtain.
2. A flight instrument as claimed in claim 1, characterized in that said rotating members are at least two drums continuously rotated at uniform speed and in opposite directions by two motors, each motor being energized through an independent transmission line which comprises a speed varying means having first and second inputs, a command computer delivering into said first input a signal responsively to a difference detected between two data relating to a specific piloting parameter, the motor power required to maintain a predetermined normal maximum angular velocity of the drum being applied to said second input, each drum bearing on its cylindrical surface a contrasted pattern so chosen that at said normal speed part of the pattern no longer be perceptible to the pilot''s retina, a command signal emitted by the computer in the event of an erroneous flight manoeuvre being applied to said first input and thereby causing the angular velocity of the drum to be reduced whereby to cause the normally invisible part of the pattern to reappear, the erroneous situation requiring correction being thus made perceivable to the pilot in his peripheral field of view.
3. A flight instrument as claimed in claim 2, characterized in that said contrasted pattern includes a set of lines drawn substantially along generatrixes of the cylinder and a set of circles drawn at right angles thereto, said set of lines being invisible at the normal rotation speed of the drum and reappearing whenever said speed decreases responsively to said command signal for correcting a difference.
4. A flight instrument as claimed in claim 1, characterized in that the direction in which said lines appear to be moving past the pilot''s eye when they reappear is designed to suggest both the magnitude and the sense of the corrective action the pilot must take on the flight controls in order to cancel out the error signal.
5. A blind flying instrument as claimed in claim 1, characterized in that each drum motor is energized through a two-input voltage variator of which one input receives the normal-speed power supply and the other input is connected to the command circuit of an amplifier for amplifying an error signal from a command computer.
6. A blind flying instrument as claimed in claim 5, characterized in that said command circuit emits a signal responsively to a difference between a commanded heading and an instantaneous heading.
7. A blind flying instrument as claimed in claim 5, characterized in that said command circuit emits a signal responsively to a difference with respect to a glide path beam.
8. A blind flying instrument as claimed in claim 1, characterized in that the stroboscopic pattern is engraved on a disc.
9. A blind flying method using a flight instrument as claimed in claim 1, including the steps of imparting a predetermined rotational speed to a member the peripheral surface of which bears a pattern that is subject to a stroboscopic effect, introducng into a speed varying means a command signal responsively to the difference between a commanded flight parameter and an instantaneous flight parameter, and reducing said predetermined rotational speed by means of said speed varying means, thereby to cause the reappearance on the surface of said member of a pattern that remains invisible at said predetermined speed due to the stroboscopic effect.
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