The most common 10 points misunderstanding of the novice introduction DJI UAV in 2021

 UAV has become an important digital product in daily life and work, especially for aerial or remote photography. DJI UAV is one of the most popular drones on the market, so as a novice how to prepare for the purchase and eliminate the most common misunderstandings. This post in DJI community has done the most common ten-point misunderstanding of DJI innovative UAV, hoping to help you.

 1. Misunderstanding: Visual positioning works in any case

 Beginners usually think drones can fly stably indoors.

 Actual: under the UAV visual positioning needs to reach the minimum illumination, texture, and contrast in order to work well, the ground can not have strong reflection, otherwise can not work, including outdoor night flight, indoor light is too dark to work properly. After entering the posture mode, the novice basically only watches the UAV in the indoor each kind of collision, the gain is not worth the loss.

 Of course, from the DJI MAVIC 2 generation to bring their own downlight, low illumination positioning problem has been well resolved.

 2. misunderstanding: mobile phones or tablets crash, drones can not control

 Novice believes that the phone crash to restart quickly, otherwise can not control UAV flight, can not return.

 Actual: the UAV connected to the remote control device is only used for user interaction, does not affect the remote control input, physical keys to maintain normal control. External terminal black screen, crash, completely do not affect you press the return key to trigger the UAV automatic return.

 3. Misunderstanding: UAV nominal maximum signal distance is equal to unconditional real distance

 Beginners usually think that so close to lose the signal, the agreed XX km long distance map?

  Actual: radio regulations in different countries allow different maximum power to radio frequencies (directly affecting signal intensity), and radio communication distances are also affected by too many external factors, especially the routers that are now essential for almost every family. And countless outdoor telecommunications hot spots, crowded in the busy 2.4 G band, not far in the city is not surprising. 5.8 G of course, due to the low penetration of physical characteristics, in the city has a better performance. Once away from cities and buildings to avoid interference, drones can naturally fly farther. It's not unusual for an old hand to take advantage of altitude, reasonable flight altitude, and correct antenna orientation beyond the manufacturer's nominal signal distance.

4. misunderstanding: satellite signal is light, a seam can be located

 Novice usually thinks, the open space in the community is so big still lose star, let a person speechless.

 Actual: good reception of satellite signals requires at least more than 130 degrees of open angle space to receive good communications. High buildings near the low-fly, strong interference areas are easy to cause star loss. New people for the convenience of taking off in the community, easy to lose stars. At the same time, taking off or flying near high-rise buildings is easy to cause direct signal occlusion, resulting in double loss of signal.

 5. Misunderstanding: To avoid obstacles is everything

 The novice usually thinks that obstacle avoidance is omnipotent and does not hit things.

 Actual: the current obstacle avoidance camera because of the size is too small, photosensitive, resolution are very low, coupled with the visual obstacle avoidance on processor resources fanatic overhead, the current technical phase, UAV visual obstacle avoidance can only make the correct feedback on large, opaque materials, and the need for appropriate light (large inverse light can make UAV false trigger obstacle avoidance and emergency brake), and low flying speed. At the same time, products with side and rear vision obstacle avoidance function only enable all obstacle avoidance sensors in specific flight mode.

 As a result, even obstacle avoidance sensors all over the MAVIC 2 can also fly into the building at night.

 Lack of light and avoidance

 Rebound wires (tiny objects)

 6. Misunderstanding: Nominal duration equals duration in actual flight scenario

 Novice thinks, mark can fly 20 minutes, but never fly so long.

 Actual: the manufacturer's nominal flight time is based on windless weather, low altitude, uniform speed flight. And the movement mode full pole flight, a 20-minute battery can be completely squeezed dry in 10 minutes. Another point is! The nominal duration is completely without consideration of return.

  If you fly over the horizon at that time, you will get higher altitude, stronger wind, harder to hit the pole, and you will inevitably consume more power, and finally ~~GG.

7. misunderstanding: the battery doesn't care

 Novice in the use of drones found that the UAV has 10% of the electricity directly off, just two weeks ago. How the battery can not charge, half a day without lights.

 Reality: first of all DJI the intelligent battery of UAV has discharge function. In order to prevent long-term full storage of damaged battery, self-discharge will begin after the default days (7~10 days) is carried out. And the smart battery itself will consume a certain amount of electricity, two weeks ago full of batteries, to the actual flight may be left 60, in this case the battery to less than 40%, the core voltage will easily reach the smart battery closing threshold. Therefore, please fill before flight, fill before flight, say important words three times.

 At the same time, because of the leakage of the core and the current consumption maintained by the intelligent battery itself, the long-term storage battery must also be replenished regularly to avoid over-discharge damage and can no longer be charged.

 8. misunderstanding: ground wind is equal to air wind.

 Novice thinks, ground just 3 level wind, so wind is not big.

 Actual: the wind in the air is often several orders of magnitude larger than the ground. If the UAV frequently pops up a gale alarm, it is better to land as soon as possible.

 9. Misunderstanding: a broken picture is a runaway return

 Novice saw all black screen how not to come back, think automatic return should start.

 Actual: sometimes although the picture is disconnected, but in fact the remote control RC signal is connected, this time will not trigger runaway return. It is necessary to use the remote control indicator to determine whether it is really disconnected. The correct way is to press the physical button of the remote control to return when the picture is transmitted or not connected. Do not intervene manually (avoid interrupting the altitude climbing process of automatic return) unless the image is restored or visual.

 10. Misunderstanding: over-exposure indicating failure

 The novice may have encountered this problem: the take-off picture has the small horse race, flies the picture to pass the big horse race, but the photograph and the video are all right.

 Actual: misopened the camera's overexposure prompt. In fact, this function for ordinary consumer UAV, hidden up is no harm, the vast majority of users are not clear, so the wrong opening is also considered a fault.