User Manual

ZEROTECH (Beijing) Intelligence Technology Co., Ltd. 6
Solid Red
Critical Battery Warning
Fast Purple Flashing
Compass Failure
Assistant Prompts
Solid Green
Horizontal Compass Calibration
Solid White
Vertical Compass Calibration
GPS Positioning
DOBBY uses a GPS & GLONASS dual-mode satellite positioning system. The satellite positioning
system is GPS based, with GLONASS acting as a supplementary system.
During outdoor flight, DOBBY uses GPS positioning when the number of GPS satellites connected to
reaches 8.
Optic Flow and Ultrasonic Positioning
DOBBY will use the optic flow and ultrasonic positioning during indoor flight. If the GPS signal is weak
(the number of connected to GPS satellites is less than 8) 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.