Replies to This Discussion

Permalink Reply by Peter Seddon on June 9, 2009 at 7:17am

It is possible to put telemetry on the audio channel of the video link. See RC-Cam for at least one thread with details of software and hardware to create interface.

Peter

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Permalink Reply by UAV Pilot on June 9, 2009 at 11:14am

Thank you I actually spoke with someone today about that same thing and that is what I think that I will do. Thank you

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Permalink Reply by Talha Habib Peracha on September 25, 2009 at 8:49pm

Well you can use Time division multiplexing to have data from different sources
being transmitted on the same frequency. Only a single transmitter will do the job in that case!

Of course then you will have to implement some protocol in software that manages the packetizing and synchronization tasks. The ground receiver will have to be synchronized to get relevant data.

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Permalink Reply by Kay on September 27, 2009 at 8:36pm

Where do you buy a 3.4 GHz radio control system? Is this some sort of custom rig?

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Permalink Reply by UAV Pilot on September 27, 2009 at 8:59pm

sorry it is a typo. I use 2.4 ghz for the radio system

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Permalink Reply by Kay on September 27, 2009 at 9:41pm

Wow this is a pretty active forum, i'm glad i joined. I am going to try to make the leap to UAV before I even learn how to fly an RC plane. Please let me know if this is a silly idea.

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Permalink Reply by UAV Pilot on September 27, 2009 at 10:01pm

It is extremely costly for a setup that would let you get away without learning to fly first. Hard to be sub-$100,000 anyway. I would suggest purchasing a simulator. I personally use real flight. $200 can save you tens of thousands.

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Permalink Reply by Caleb M on September 27, 2009 at 11:28pm

even if your broke. get a usb flight controller from ebay, 6 channel one. and learn on FMS, its a free flight sim. the pros use simulators to practice. and anyone who ever flies should have one. I started on FMS and highly recommend it.

I have some info on my site about FMS,
http://cmreel.com

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Permalink Reply by Kay on September 28, 2009 at 8:56pm

cool thanks for the info. i think i'll get one of those simulators, but i'm also going to simultaneously purchase either a T28 trainer or an easystar

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Permalink Reply by Mike Bakula on October 10, 2009 at 6:45pm

At Embry-Riddle we've done combined video and command/telemetry using modified 802.11b hardware. To stay legal, we run it as an amateur radio under FCC part 97. Any ethernet camera works as an input; we've used the Axis 207 with good results, although it is sensitive to vibration.

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Permalink Reply by Mike Bakula on October 11, 2009 at 6:55am

I see the old papers are not up at AUVSI's website, so I'll attach our 2008 competition paper here. Unfortunately, I don't have the mods for the Axis 207W anymore, but I remember it was a couple of config file tweaks. I'm hoping to do the same to a Linksys WVC54GCA camera after I get my Ardupilot flying with the Xbee datalink. (Have to take it one challenge at a time!)

Attachments:

• SOAR-2008.pdf, 980 KB

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Permalink Reply by UAV Pilot on October 11, 2009 at 4:18am

What I worry about with transmitting the telemetry over audio line is that I have not found a video transmitter that can have encrypted communications between the transmitter and receiver so that you do not have cross communications and I have not found a two way video link. If there was a modem that was commercially available to be able to stream enough data back and forth would be ideal. I wish you could just like shotgun two radio modems even like they did with dial up for a while.

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