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Downwars Infrared system
1226 13 2018-2-28
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eltoffer
lvl.1
Flight distance : 787 ft
Mexico
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Hi i just got the mavic air yesterday, and before i could fly i had to update the firmware, but then i noticed that the downwards IR "leds" were working "abnormally" well at least this is what i think only one side is on and the other is off, i dont know if this is how it should be thats why i came to ask you, judst look to the  picture for your reference.

i tryied to fly and everything was fine, no abonormal behavior or sensor failure notification but i want to be sure

thank you all of you
20180228_111918_014_01.jpg
2018-2-28
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DJI Elektra
Administrator
China
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Hi, there. Please do not feel worry about it. It should be one led on and one is off. Thanks for your attention.
2018-2-28
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eltoffer
lvl.1
Flight distance : 787 ft
Mexico
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DJI Elektra Posted at 2018-2-28 22:17
Hi, there. Please do not feel worry about it. It should be one led on and one is off. Thanks for your attention.

Thanky you Elektra

Just for knowladge, what are these sensors for and why one is on and there off?
2018-3-1
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A CW
Captain
Flight distance : 13838848 ft
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United Kingdom
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To provide stability in hover by ‘seeing’ the ground without a GPS connection. They only work in brighter light conditions and lower altitudes (up to around 10m). It’s a downward vision positioning system. No idea why only one comes on.
2018-3-1
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sky6105
First Officer
Flight distance : 345653 ft
United States
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Looks like one is transmitting the beam and the other is the receiver.
2018-3-1
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A CW
Captain
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sky6105 Posted at 2018-3-1 08:32
Looks like one is transmitting the beam and the other is the receiver.

Spot on!      
2018-3-1
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eltoffer
lvl.1
Flight distance : 787 ft
Mexico
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Thanks to all, now I can fly safe
2018-3-1
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A CW
Captain
Flight distance : 13838848 ft
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United Kingdom
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eltoffer Posted at 2018-3-1 13:40
Thanks to all, now I can fly safe

           
2018-3-1
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DJI Elektra
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China
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A CW Posted at 2018-3-1 08:25
To provide stability in hover by ‘seeing’ the ground without a GPS connection. They only work in brighter light conditions and lower altitudes (up to around 10m). It’s a downward vision positioning system. No idea why only one comes on.

It is ultrasonic sensor to detect the land. Please inform us if you still have doubt.
2018-3-5
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Tomcatuk
First Officer
Flight distance : 28743 ft
United Kingdom
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Should you be able to see the light from the sensor as I've never seen any light from either one...?
2018-3-5
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DJT_MVSP
Captain
Flight distance : 2018645 ft
Singapore
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Tomcatuk Posted at 2018-3-5 03:59
Should you be able to see the light from the sensor as I've never seen any light from either one...?

Some camera system can "see" infrared light (some more sensitive than others). Our eyes, however, will perceive it as a dim red light.

The infrared TOF sensor on the Air and the Spark uses a separate transmitter and a receiver. One pulses infrared light while the other captured those pulses. Hence only one of them will emit infrared light as shown above.
2018-3-5
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A CW
Captain
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Now that explains it - thanks DJT MVSP. I knew they were not ultra sonic sensors but rather IR only as totally different to my MPP and P4P but wasn’t sure why only one of the IR sensors is lit in the OP’s post. Now I know
2018-3-5
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Brad Bilger
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United States
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DJT_MVSP Posted at 2018-3-5 04:24
Some camera system can "see" infrared light (some more sensitive than others). Our eyes, however, will perceive it as a dim red light.

The infrared TOF sensor on the Air and the Spark uses a separate transmitter and a receiver. One pulses infrared light while the other captured those pulses. Hence only one of them will emit infrared light as shown above.

The same reason that you can take the camera on your Cell phone, point your remote control for your tv at the remote and see the flash of IR light from the remote.  Great way to test your TV remote to see if it's working.  
2018-3-5
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Tomcatuk
First Officer
Flight distance : 28743 ft
United Kingdom
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Thanks for the explanation....
2018-3-11
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