Crawler for videos

Posted by Roberto PAGNIN on July 12, 2016 at 3:20am

Hi,
I'd like to build an autonomous rover navigating on rough terrain in order to carry a camera for doing videos.

Could you please give me some feedback on the following components list?

Thank you for your time
Rob

Chassis: 1/8th Scale 2.4Ghz Exceed RC MaxStone 4WD Powerful Electric Remote Control Rock Crawler 100% RTR (better to change ESC?) http://www.nitrorcx.com/51c875-maxstone8-green-24ghz.html
Control: ERLE BRAIN 2 (need to implement some logic and the ROS ecosystem) https://erlerobotics.com/blog/product/erle-brain-v2/
Power: 5000 MAH LIPO BATTERY + power module (https://erlerobotics.com/blog/product/power_mod/)
Transmitter+Receiver: any advice (I'd like to control the rover anyway)
GPS: looking for a gps very precise (1-2 meter precision)
Telecamera: t.b.d. (+gimbal)
Dongle wi-fi: any compatible with Erle device
Companion computer: raspberry 2
Anything more?

Sorry for my bad English...

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Replies

  • Roberto PAGNIN July 18, 2016 at 2:20am

    I think that you've done an awesome thing and people would welcome it in open-source.   I could be a contributor from a software point of view, I'm a developer (Java/JS+HTML/SQL seasoned, Arduino/C beginner) if needed.
    Pls. let me know if  you decide to move it to os.

    Thanks for all the answers

    Rob

  • Roberto PAGNIN July 14, 2016 at 1:13am

    I think that you've done an awesome thing and people would welcome it in open-source.   I could be a contributor from a software point of view, I'm a developer (Java/JS+HTML/SQL seasoned, Arduino/C beginner) if needed.
    Pls. let me know if  you decide to move it to os.

    Thanks for all the answers

    Rob

  • Beat July 13, 2016 at 8:27am



    Roberto PAGNIN said:

    @Beat: sorry for the dumb question, why 2 differential gps sensors?   Is it for interpolation of point?  If this how the encoder can help?

    Thanks 

    Rob

    You need two GPS, one is setup on your robot, another one is placed in a fixed point(do not move it). Two GPSs must communicate with each other. In another word, you need a fixed GPS(fixed coordinate) and a moving GPS unit. This is not a DIY mission, please find a comercial solution. 

    The accuracy of  GPS speed is very bad when robot moving slow (<2m/s) and when robot turning. Motor encoder will help you to get the speed better than GPS.

  • Beat July 13, 2016 at 8:14am



    Roberto PAGNIN said:

    Beat,

    thanks for the feedback and for sharing the video of your creation.

    For sure your requirements' setup is more challenging than mine (waterproof, etc.), are you planning to add autonomous navigation or I missed it ?    Has the rover APM powered ?

    Rob

    I developed a UGV groundstation, I plan to opensource it if people like it.

    This Rover is APM powered, but I didn't use the offical APMRover firmware.

    3702267409?profile=original

    3702267359?profile=original

    3702267312?profile=original

  • Roberto PAGNIN July 13, 2016 at 3:26am

    @Beat: sorry for the dumb question, why 2 differential gps sensors?   Is it for interpolation of point?  If this how the encoder can help?

    Thanks 

    Rob

  • Roberto PAGNIN July 13, 2016 at 2:06am

    Beat,

    thanks for the feedback and for sharing the video of your creation.

    For sure your requirements' setup is more challenging than mine (waterproof, etc.), are you planning to add autonomous navigation or I missed it ?    Has the rover APM powered ?

    Rob

  • Beat July 12, 2016 at 9:50am
    Q: GPS: looking for a gps very precise (1-2 meter precision)
    A: You need a pair of differential GPS, otherwise, 1-2m precision can be guaranteed.

    Motor encoder is not a MUST, but it will help you a lot to correct GPS position.
    You need a portable screen which can be easly to attach on your remote controller.

    I'm doing the similar project. Nice to share with you.
    https://www.youtube.com/watch?v=U8-ea5xJK8E

    R
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