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Thread: RTEAM Robotics Club Mech Warfare 2015

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    RTEAM Robotics Club Mech Warfare 2015

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    We're located in Tucson, AZ.

    RTeam Robotics Website

    This thread to post information on things RTEAM robotics is doing with Mech Warfare. Other members in our club might post in this thread.

    This is a video of exhibition matches we did during a club meeting on 3/21/2015.


    Will post more videos and information when we can.

    Scoring system we used during exhibition match:
    - 2013 Scoring Transponder RTeam Variant
    - Piezoelectric Speaker Scoring Panels

    We took the 2013 Scoring Transponder and added a FTDI 6 pin connector to it. We then loaded the Arduino Bootloader and modified the original code to work in Arduino IDE.

    We also created our own scoring panels, the new scoring panels uses a piezoelectric speaker to detect hits. There is also some additional circuitry added to condition the signal. The panel is designed to be compatible with the old scoring transponder and work with the old scoring panels. In the video, Nomad is using 3 old scoring panels and 1 new piezoelectric panel. Apophis is using 4 of the new piezoelectric panels.

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    Re: RTEAM Robotics Club Mech Warfare 2015

    Quote Originally Posted by artans View Post
    We also created our own scoring panels, the new scoring panels uses a piezoelectric speaker to detect hits. There is also some additional circuitry added to condition the signal. The panel is designed to be compatible with the old scoring transponder and work with the old scoring panels. In the video, Nomad is using 3 old scoring panels and 1 new piezoelectric panel. Apophis is using 4 of the new piezoelectric panels.
    I remember we tried using piezoelectric sensors @ the very first Mechwarfare. They didn't work very well, and were not reliable.. and in some cases.. would trigger when the Mech would walk. That's why we switched from them to Force Sensing Resistors (FSR). Now the issue could have been the mounting method.. or some other issue.. but, from our experiments, the FSR's worked way better.

  3. #3

    Re: RTEAM Robotics Club Mech Warfare 2015

    Perhaps a mounting interface based on sorbathane would make the piezos less sensitive to walking?

    Btw, if you want a site that supports registration of teams/bots/competition for events, I developed this:

    http://mwreg.watte.net/

    It currently doesn't do any pictures, which I feel is a significant draw-back, but that can be added in time.

    Give me a ping if you want an event listed!

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    Re: RTEAM Robotics Club Mech Warfare 2015

    Some of the FSR plate disadvantages that I think we all don't like are: 1.) Expensive 2.) Damage from handling of the four flex connections to the circuit card. 3.) Dead zones between the four FSR sensors. 4.) Not always registering valid hits 5.) Mounting compliance to the body affects hit detection reliabilty. 6.) Less sensative to valid angled hits

    The reason we have started using the piezo target panels in Tucson is because there are now six mechs in Tucson and we only have enough FSR target panels for 3 robots and the other guys wanted their own panels. Also because of the above disadvanges of the FSR target plates we developed our own that can be easily and cheaply built. We made them compatible with the existing target transpoder and connector. The target panels do not register false hits, only valid hits are immune to walking gait.

    RTEAM piezoelectric target plates are fully compatible with the existing target plate system and I think offer 6 advantages over the FSR plates. 1.) They are much more sensitive than the FSRs 2.) They register target plate hits reliably every time and never resgister any robot vibration or shock to the robot. The target plates are oblivious to walking gait. 3.) They are much cheaper than FSR target plates and easliy made with analog components. 4.) They can be de-tuned to be less sensitive and mimic an FSR low sensitivity target plate. 5.) There are no dead zones in the target panel like there are on FSR target panels. 6.) The target panel can be any shape or size unlike the FSR target panels. 7.) The target panels are tougher than the FSR plates and are not easily damaged

    These piezo target panels filter and shape a proper hit pulse while rejecting false hits, vibration, shock and walking gaits. Gun fire vibration from the onboard gun does not register false hits either.

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    Re: RTEAM Robotics Club Mech Warfare 2015

    Quote Originally Posted by giantflaw View Post
    RTEAM piezoelectric target plates are fully compatible with the existing target plate system and I think offer 6 advantages over the FSR plates. 1.) They are much more sensitive than the FSRs 2.) They register target plate hits reliably every time and never resgister any robot vibration or shock to the robot. The target plates are oblivious to walking gait. 3.) They are much cheaper than FSR target plates and easliy made with analog components. 4.) They can be de-tuned to be less sensitive and mimic an FSR low sensitivity target plate. 5.) There are no dead zones in the target panel like there are on FSR target panels. 6.) The target panel can be any shape or size unlike the FSR target panels. 7.) The target panels are tougher than the FSR plates and are not easily damaged
    Well, these sound great. Is there any documentation or plans for documentation?

  6. #6

    Re: RTEAM Robotics Club Mech Warfare 2015

    That sounds 100% awesome!

  7. Re: RTEAM Robotics Club Mech Warfare 2015

    That's cool I would be glad to get some more info on your mechanisms (target, feeder,...) too.
    ---
    Personal blog: http://xevel.org
    USB2AX documentation: http://xevelabs.com

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    Re: RTEAM Robotics Club Mech Warfare 2015

    Yes, we can post the Eagle files, laser cutter files with some pics and directions. Have to pull it together as different people have done pieces of it in the club.

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    Re: RTEAM Robotics Club Mech Warfare 2015

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    We had our second Mech Warfare battle today. We're planning to hold them roughly on a monthly basis. We have several mech's that are either fully functional, or close to being. Still need a bit of work on our arena....

    https://youtu.be/MMrtD-6hsFs

    If anyone is ever in the Tucson area, feel free join the mayhem.

  10. #10

    Re: RTEAM Robotics Club Mech Warfare 2015

    Regular practice? You will beat down anyone else if you keep that up!

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