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AGRAS T50/T25
Unmanned Aircraft Flight Manual
©
2024 DJI All Rights Reserved.
11
Binocular Vision and Phased Array Radar (Detection and Obstacle
Avoidance System)
Prole
The aircraft is equipped with the phased array radar system and binocular vision system. The
systems provide multidirectional obstacle sensing
[1]
as well as terrain follow and bypass functions to
ensure flight safety. In an optimal operating environment, the radar module can help the aircraft to
fly above the vegetation at a constant distance and ensure even spraying and terrain following. In
addition, the flight control system limits the descent speed of the aircraft according to the distance
between the aircraft and ground detected by the radar module to achieve a smooth landing.
The binocular vision system is enabled automatically when the aircraft is in use. In Route and A-B
Route operation modes, users can enable the terrain follow and bypassing functions for different
terrain types. The aircraft will fly above the vegetation at a constant spraying distance and bypass
detected obstacles. In Manual and Fruit Tree operation modes, the radar can measure the spraying
distance above the vegetation or other surfaces. Obstacle avoidance can be used in any mode.
[1] The downward sensing system is used to assist in Terrain Follow, while the sensing function on the other
sides is for obstacle sensing.
Detection Range of Binocular Vision System and Radars
Binocular vision system: 90° (horizontal), 106° (vertical), 0.5-29 m.
Forward phased array radar: 360° (horizontal), ±45° (vertical), ±45° (upward, cone),1-50 m.
Rear phased array radar: 360° (vertical), ±45° (horizontal), 1-50 m.
Note that the aircraft cannot sense obstacles that are not within its detection range. Fly with
caution.
The effective detection range varies depending on the size and material of the
obstacle. When sensing objects such as buildings that have a radar cross section (RCS)
of more than -5 dBsm, the effective detection range is 50 m. When sensing objects
such as power lines that have a RCS of -10 dBsm, the effective detection range is
approximately 30 m. When sensing objects such as dry tree branches that have a RCS
of -15 dBsm, the effective detection range is approximately 20 m. Obstacle sensing
may be affected or unavailable in areas outside of the effective detection distance.
Fly with caution when the aircraft is near an obstacle that is at a similar altitude with
the bottom of the aircraft. The aircraft cannot detect the obstacle as most or even the
whole obstacle is out of the detection range.
Omnidirectional Obstacle Avoidance Function
Enable the function in Sensor Settings, or tap the radar indicator in Operation View or press the
button on the remote controller to enable obstacle avoidance. When enabled, the aircraft will
enter obstacle avoidance mode when obstacles are detected. Users can control the aircraft to
fly in a direction away from the obstacle according to the prompt in the app. Obstacle avoidance
is used in the following two scenarios:
1. The aircraft begins to decelerate and hovers in place when it detects an obstacle. While
decelerating, users can control the aircraft to fly in a direction away from the obstacle.
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