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US 2014/0236400 A1Published application
Laser Landing Altimeter for Precision Aircraft Landing Aid
AssigneesChengDu HaiCun IP Technology LLC, Guobiao Zhang
InventorGuobiao ZHANG
Life of this patent
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Abstract
The present invention discloses a laser landing altimeter for precision aircraft landing aid. Its measurement unit measures distance using a modulated laser beam with centimeter accuracy. Its processing unit predicts the future altitude based on a realistic landing altitude model and determines the landing maneuver time (the time to initiate a landing maneuver).
Claims20
A laser landing altimeter for an aircraft, comprising:
- measurement unit for measuring a distance of said aircraft to the ground using a modulated laser beam when said aircraft is near ground;
- processing unit for calculating a future altitude of said aircraft based on a plurality of measured distance data.
An apparatus for predicting a future distance to a remote object, comprising:
- measurement unit for measuring a distance to said object using a modulated laser beam within a measurement period, said measurement period being substantially longer than the time-of-flight between said apparatus and said object;
- processing unit for calculating said future distance based on a plurality of distance data measured in an evaluation period comprising a plurality of successive measurement periods.
A landing-aid apparatus for an aircraft, comprising:
- means for measuring a distance of said aircraft to the ground using an electromagnetic-wave (EM-wave) beam when said aircraft is near ground;
- means for orienting said EM-wave beam along the direction of gravity during landing.
Dependencies are inferred from the claim text.