Replies to This Discussion

Permalink Reply by Samuel on May 13, 2012 at 3:41am

Hi,

i'm currently working on a project that includes telemetry over video. But we just started so there won't be anything in the next few weeks i can show you. You need to be patient a bit more, but there will be something till the end of summer i hope.

Cheers

• ▶ Reply

Permalink Reply by Boris Matuschka on May 13, 2012 at 3:50am

Hi Samuel!

Thanks for your answer! That is really cool to know. Do you have a project page, where i can update myself and follow your project?

Thanks

• ▶ Reply

Permalink Reply by Samuel on May 13, 2012 at 3:52am

Not yet, i really just started. But i can tell you this: We have some kind of ground station and we want to use the MinimOSD to add telemetry data to the video stream. Groundstation will have some special features you'll like too ;). We already have a prototype and working software for some of the cool features. But we didnt work on the MinimOSD code yet.

More information soon.

• ▶ Reply

Permalink Reply by criro1999 on May 14, 2012 at 8:16am

see below a test i was doing using ofpv which extract OCR the lat lon from video.

it push data to a comm port where you can use for tracking.

i use the HK GCS tracking to use the output of LAT/LON from OFPV and make traking with Polulu/Maestro work pretty OK.

 

http://vimeo.com/39309663

OFPV: psykokwak.com

 

 

• ▶ Reply

Permalink Reply by Samuel on May 14, 2012 at 10:18am

This is nice, but not what Boris meant. You read the data with your computer from the video, but he meant to transfer data through hidden video lines, so you can use a microcontroller or a ground control station to read it without laptop on the field.

• ▶ Reply

Permalink Reply by Boris Matuschka on May 15, 2012 at 2:05am

Samuel, I am really keen on what you are doing out there in your secret labs :-). 

I could imagin using some audiomodem like this http://www.electronicarc.com/catalogo/product_info.php?cPath=43_66&... for example to geht the signal down but how to get it then to the ardustation. this is where my kowledge of programming starts and ends :-)

could you give me PLEASE, PLEASE, PLEASE some more info about your project? if you do not want to do ist official then via pm or mail would be really appreciated...

Bye

Boris

• ▶ Reply

Permalink Reply by Samuel on May 15, 2012 at 4:12am

It will be a diversity controller with the ability to attach servos to control an antenna tracker mechanism.

• ▶ Reply

Permalink Reply by criro1999 on May 15, 2012 at 4:34am

Keep in mind that using telemetry using audio modem (downlink) or telemetry embeded on the visual signal is ONE WAY direction only (downlink). For antenna tracking would be enough. But if you want to use your APM2 with all the features, I would suggest you have in attention dual path (downlionk and uplink). Instead of XBeee, you can use DIYDrones radios (which are dual) or I am using XRF radio (aslo dual) from http://shop.ciseco.co.uk/xrf-wireless-rf-radio-uart-rs232-serial-da... at £9.90.

Thre are similar and compatible with XBee, but less expensive. And you can use 4 different frequecy for the same module, based on your existing radio (video, TX, etc).

• ▶ Reply

Permalink Reply by Boris Matuschka on May 15, 2012 at 4:54am

criro, thanks for the hint with the radio this is really cheap :-). tracking would be enough! I plan to install the apm2 into a plane and want to fly fpv with it so i need an antennatracker with the ardustation it can do but then i have 3 transmitting freqs 900mhz 1g2 and 433 mhz so i tested the xbee with the standard duck antenna and the whip (the short cable) it did not make a very good range! i could replace it with a sma connector and other duck antenna but then there stays the little !antenna forrest" on the ground :-)

Samuel, i take 2 of them :-)

• ▶ Reply

Permalink Reply by criro1999 on May 15, 2012 at 8:45am

So, you need antenna tracker just for video downlink? If youi want you can attach also a directive antenna (patch, yagi) for telemetry aslo (866, 433) to the same hardware device at ground station and the range for telemetry would be extended. So your antenna tracking would point to your model 2 antennas: Video downlink AND telemetry (uplink/downlink).

• ▶ Reply

Permalink Reply by Samuel on May 15, 2012 at 8:50am

Since you can only fly as far as video sends, it should be fine using video for telemetry. Then you dont need a second unit to send stuff...

• ▶ Reply

Permalink Reply by criro1999 on May 16, 2012 at 8:15am

agree with you, but what if your video start to loose the signal quality and implicit the telemetry inside video? having telemetry on separate channel (frequency) gives you the option to continuing flying without video (like IFR) for short time, based on instruments, which are feed by telemetry, until you come back to the good video signal... You can use HK GCS or APM Mission planner to fly "IFR"... And video is not coded, any people with a video TX could jam your signal for the same friequency, XBee or XRF are working different, they are kind of coded.

• ‹ Previous
• 1
• 2
• Next ›
• Page