+ Reply to Thread
Results 1 to 5 of 5

Thread: S2 Scribbler Finding object?

  1. #1

    Default S2 Scribbler Finding object?

    Hi

    I am programming for the S2 for a prototype of mine and I want my
    S2 Scribbler to find some random points A,B,C...N where the number of points are
    unknown in a open area and stay there for 15 mins in each one and and keep going
    and finding the next point until all the points are founded. I have the
    following questions:

    1) What kind of sensor + receiver do I need ? for
    each point (i was thinking something like radio frequency tags or magments) and
    calculate the best route
    2) How i can tell my algorithm to go back ? because
    i will have a cable hook to it and i want the S2 to resolve if it is tangled and
    keep searching the points


    I hope that you can somebody can help me

  2. #2

    Default Re: S2 Scribbler Finding object?

    A couple questions:
    - Are the points arranged in any way or are they distributed randomly? It can take a long time to find a point if you have no clues about which direction to head. Just getting a robot to cover every point in an area is a challenge in itself.
    - Would there be any other navigational aids? A line could be very helpful in this case.


    RFID would work for detecting points. I have never seen an S2 with an RFID reader attached but it should be possible. RFID stickers are unique and you need to be very close to read them.

    A slightly cheaper and simpler alternative might be use the ColorPAL and have it detect colored stickers. There would be a lower number of points you could detect because of your possible color choices. But lets say you wanted to detect ten points on a hardwood floor. You could get ten bright primary colored stickers-- not brown obviously-- all their own color. The ColorPAL can detect shades very well. You could easily program the S2 to detect them and tell which ones it had visited and which one it hadn't.

    It seems like it would be a fun problem to attack either way.

  3. #3

    Default Re: S2 Scribbler Finding object?

    They are distributed randomly and it is going to be in my back yard then I also have a pool, how i can ensure that my s2 wont drawn in to the pool and find the objects into the grass?

    ..............................


    Quote Originally Posted by GeorgeCollins View Post
    A couple questions:
    - Are the points arranged in any way or are they distributed randomly? It can take a long time to find a point if you have no clues about which direction to head. Just getting a robot to cover every point in an area is a challenge in itself.
    - Would there be any other navigational aids? A line could be very helpful in this case.








    RFID would work for detecting points. I have never seen an S2 with an RFID reader attached but it should be possible. RFID stickers are unique and you need to be very close to read them.

    A slightly cheaper and simpler alternative might be use the ColorPAL and have it detect colored stickers. There would be a lower number of points you could detect because of your possible color choices. But lets say you wanted to detect ten points on a hardwood floor. You could get ten bright primary colored stickers-- not brown obviously-- all their own color. The ColorPAL can detect shades very well. You could easily program the S2 to detect them and tell which ones it had visited and which one it hadn't.

    It seems like it would be a fun problem to attack either way.

  4. #4

    Default Re: S2 Scribbler Finding object?

    I was thinking, how are you going to make sure it doesn't get stuck? I don't know what your backyard is like, but assuming it has grass, concrete, and a pool, there are probably some transitions in the ground surface that the S2 is going to get stuck on. Outdoor robots-- like the ones they use for Robomagellan contests-- usually have a lot better ground clearance. With that big of an area and those kinds of surfaces you probably would need to demarcate where the robot can go with white or black tape.

    I would recommend trying the task indoors first.

  5. #5

    Default Re: S2 Scribbler Finding object?

    No easy task. GPS is accurate to several feet at best, occasionally tens of feet.

    Prediction: this bot's on the bottom of the pool the first day. Within an hour.

    Not trying to discourage, just to manage expectations. If it was easy, everybody would be doing it.

+ Reply to Thread

Similar Threads

  1. S2 (Scribbler II) Object Overview
    By Phil Pilgrim (PhiPi) in forum Robotics
    Replies: 5
    Last Post: 05-10-2010, 10:49 AM
  2. Help finding PWM-In measure object (measure duty cycle of incoming pulses)
    By LarryG in forum Propeller 1 Multicore Microcontroller
    Replies: 3
    Last Post: 04-03-2010, 08:51 PM
  3. Finding spin object size
    By sbk58 in forum Propeller 1 Multicore Microcontroller
    Replies: 11
    Last Post: 02-22-2010, 02:13 AM
  4. Replies: 10
    Last Post: 02-21-2007, 11:00 PM
  5. Sx Finding help
    By MacGeek117 in forum SX Chips and Programming Tools
    Replies: 8
    Last Post: 02-28-2005, 05:57 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts