Potensic D88 - Page 12

!
The precision of the optical flow positioning system is easily affected by the light
strength and features of the surface textures. It would happen that the ultrasonic sensor
could work normally to detect the altitude when it is flying over objects that is made by
sound-absorbing materials. Once the image sensor and ultrasonic sensor are both not
available, your aircraft will switch to Gesture mode automatically. Be cautious to operate
the aircraft in the following situation:
1. Fly fast at an altitude below 0.5m.
2. Fly over monochrome surfaces (like pure black, pure red, pure red and pure green).
3. Fly over strong light reflective surfaces or surfaces prone to reflection.
4. Fly over water or transparent object surfaces.
5. Fly over moving object surfaces (such as crowds, swaying juggles and glass).
6. Fly over an area where light changes dramatically and rapidly.
7. Fly over surfaces extremely dark (lux<10) or extremely bright (lux>10,000).
8. Fly over material surfaces that is good at absorbing ultrasonic waves (like thick carpet).
9. Fly over surfaces without clear textures.
10. Fly over surfaces with highly repeating textures (small grid brick in the same color).
11. Fly over surfaces that are tilting over 30 degrees (could not receive the echo of the
ultrasonic wave).
12. Flying speed should be controlled not to be too fast. When the aircraft is 1 meter
against the ground, the flying speed should not be over 5m/s; When the aircraft is 2
meter against the ground, the flying speed should not be over 14m/s.
!
Attention: Keep animals away from the aircraft when the vision system is activated.
The ultrasonic sensor emits high frequency sounds that are audible to
some animals.
● Keep sensors clean at all times.
● The optical flow positioning system is only effective when the aircraft is within the
altitude range of 3 meters.
● Make sure that the light is bright enough and the surfaces is with clear textures so that
the vision system can acquire the movement information through recognizing the
ground textures.
● The vision system may not function properly when the aircraft is flying over water, low
light ground and surfaces without clear patterns or textures.
● Do not use other ultrasonic device with a frequency of 40KHz when the vision system
is in operation.
Potenstic D88 User Manual
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