Owner's Manual

Optic Flow and Ultrasonic

Positioning

DBUS1 will use the optic flow and ultrasonic positioning during indoor

flight. If the GPS signal is weak (the number of identified satellites is <8)

during outdoor flight, the drone will automatically use optic flow and

ultrasonic positioning as supplements.

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 optic flow and ultrasonic positioning is 0.5-3m. When

using this positioning system, after the drone 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 drone will

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.

Propellers

DBUS1 has a set of 4 folding propeller arms. The propellers are already

mounted; users need only to expand the arms before the flight. When

you’re done with flying, fold the arms and the blades to prevent

damaging them.

• Ensure that the lens of the optic flow camera is clear.

• Because the ultrasonic positioning system may be affected by ultrasonic

waves emitted by other ultrasonic equipment, please do not fly near other

ultrasonic equipment, including other drones.

• The ultrasonic sensor will emit ultrasonic waves that are inaudible to humans

but may make some animals nervous. Please do not use the drone close to

animals.

The optic flow and ultrasonic positioning system may not

work under these circumstances, so please use with caution:

• Above highly reflective surfaces;

• Above water or transparent objects;

• Above people or moving objects;

• In areas with rapidly changing/flashing lights;

• Above very bright or very dark surfaces;

• Above objects that easily absorb ultrasonic waves;

• Above surfaces without clear textures or with too sparse

or too dense textures;

• During fast flight at low levels (0.5m or less)