High Great HG TAKE, User Manual

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during outdoor flight, the aircraft will automatically use optic flow and
ultrasonic positioning for supplement.
The optic flow and ultrasonic positioning system combines dynamic image
analysis to horizontally position the aircraft during flight and ultrasonic
distance measurement to determine the distance from the ground. It
positions the aircraft during indoor flight and assists the GPS positioning
system during outdoor flight.
The optic flow and ultrasonic positioning module is located on the base of the
aircraft. It consists of an optic flow camera and an ultrasonic sensor.
Usage Conditions and Restrictions
The optic flow and ultrasonic positioning system is used for indoor flight. It is
also used for outdoor flight if the GPS signal is weak. The operating height
range for this positioning system is 0.5-3m.
When using this positioning system, after the aircraft has taken off and
ascended to 0.5m, it will determine if the requirements for using this system
have been met. If they have not, it will initiate landing. If the requirements are
not met for this system during flight, the aircraft will also initiate landing.
Requirements for the optic flow and ultrasonic positioning system: When
using this system, the area underneath the aircraft needs to have a clear
textured surface that is not too sparse or too dense. Users can put a textured
carpet or cloth on the ground, table or any large, horizontal surface to provide
the required textured surface.
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The optic flow and ultrasonic positioning system may not work under
these circumstances, please use with caution:
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Above highly reflective surfaces;
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Above water or transparent objects;
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Above people or moving objects;
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In areas with rapidly changing/flashing lights;
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Above very bright or very dark surfaces;
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Above objects that easily absorb ultrasonic waves;
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Above surfaces without clear textures or with too sparse or too
dense textures;
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During fast flight at low levels (0.5m or less), the optic flow and
ultrasonic positioning system may not work.
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