Replies to This Discussion

ModeratorPermalink Reply by Alex on October 4, 2011 at 1:21pm

There is lots of code for obstacle avoidance online.. particularly for arduino, have a look at stuff jose julio has done with arducopter many months ago

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JDronesPermalink Reply by Jani Hirvinen on October 4, 2011 at 7:02pm

Currently ArduCopter main code only supports bottom Sonar for low level altitude hold. You could say that this is some level of bottom "obstacle avoidance". Nothing horizontal isn't ready yet. Yes Jose from our dev.team had IR based horizontal avoidance on our old ArduCopter NG based code bases.

 

When ArduCopter 2 will have it?? it's still hard to say.  Any volunteers to start working with it??

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Permalink Reply by Steven Gates on October 4, 2011 at 8:38pm

Actually, my senior design team is trying to code this for ArduCopter 2.  We're only about a week into the coding but hopefully we will have some results in a couple of months.

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Permalink Reply by Guang Yao on October 5, 2011 at 5:31am

Hi Steven,

 

Currently I am (almost) done with adding four IR sensors on my quad. It is running on an old code (ArduPirates) though, so it doesn't operate autonomously. Are you guys doing it for a final year design project?

 

Thanks,

Cedric

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Permalink Reply by Steven Gates on October 26, 2011 at 8:21pm

Yeah we are... We're using the new ArduCopter code..  Do you mind sharing?

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Permalink Reply by anubhav prabakar on April 23, 2012 at 1:19am

Hi I am trying to add MaxBotix ultrasonic sensors for obstacle avoidance as well. Did you come up with any results??

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JDronesPermalink Reply by Jani Hirvinen on April 23, 2012 at 2:52am

Sonars are not the best for that especially is you plan to use them on horizontal level. Propellers are creating a lot of noise that sonar sees if you try to point them forward/side. IR is better for horizontal but then there is a problem with size of the IR beams.

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Permalink Reply by anubhav prabakar on April 23, 2012 at 3:00am

Thank you very much for your quick reply!! 

My main objective is to add sonars and show some results to my Professor at the uni. he wants to see the problems and then find an appropriate solution

Could you please guide me on how to proceed with adding sonars. ( even if they cause problems)

Which code base to use and where to add this code.

If you have implemented it, is it possible for you to share it. 

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Permalink Reply by OG on April 23, 2012 at 6:47am

in terms of sensors will you be using optical flow for this?? or will you be using other types of sensors? if so I would recommend Parallax Laser Range Finder . integration should not be too complicated is this a possibility if not how come? http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/Cat...

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Permalink Reply by anubhav prabakar on April 27, 2012 at 1:41am

I have already bought 6 Maxbotix (XL-Maxsonars EZ/AE) range finders. I am trying to integrate them in the Arducopter code but i do not understand which part of the code to modify to add these sensors in a daisy chaining format for obstacle avoidance... any ideas ????

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Permalink Reply by Jahn Otto Andersen on October 27, 2011 at 12:23am

...not until 2.1, I hope. Let's get a stable and finalized 2.0 before adding new features ;)

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Permalink Reply by Steven Gates on April 25, 2012 at 10:47am

Actually, yes, I do have results.  We now have a fully autonomous quad that has obstacle avoidance.  Send a command to go forward (any distance) and the MAV avoids all obstacles while locating to the desired coordinates.  We used Sharp long range IR sensors and the Parrot AR Drone.

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