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Pragyan 2011 - Copy Cat

Copy Cat

Cash prizes worth 50,000 INR to be won!

Pragyan implements the complexities of mirroring in robotics. Every team is expected to build 2 fully autonomous robots, of which one has to follow the lines, map the maze from it, and transfer the maze information to the other robot which is expected to traverse the mirror image of the maze and reach the finish line in the least possible time.

There is a line and a mirror image of it on the arena. Every team is expected to build 2 fully autonomous robots, of which one has to follow the lines, map it, and transfer the necessary information to the other robot which is expected to traverse the mirror image (virtual) of the line about the virtual mirror and reach the finish spot in the least possible time.


The task can be logically split into two parts as follows:

  1. The “Sensing-Bot” has to traverse the line, sense them and map it. This bot is supposed to transmit this information to the “Blind-Bot” through wireless means. The transmission though can be either during the run of the “Sensing-Bot” or just after the completion of the mapping procedures; the time measurements will be made once the “Blind-Bot” starts to move.
  2. The “Blind-Bot” has to receive the information transmitted by the “Sensing-Bot”, and use it for traversing through the walls around the virtual line and reach the finish spot in the least possible time. The “Blind-Bot” is also allowed to check its course during its run with the help of the Way-Points present at every turn in the maze.

Note: The “Blind-Bot” is not allowed to sense its environment in any way other than sensing the way-points present at the turns in the maze. The teams have the option of choosing whether to use this option or not. Teams that opt not to use this option will be awarded bonus points as in the table explaining the scoring procedure.



  • The arena will be made up of wood, painted with a white background with sufficient reflectivity and friction. It has two halves, one consisting black lines on white surface and the other consisting of walls; where the gap between the walls depict the exact mirror image of the line on the other half.
  • The “Sensing Bot” is to be placed in the line half and has to sense the line. The “Blind-Bot” has to travel through the walls without hitting them and reach the finish spot.
  • The walls are made up of rigid plywood. The “Blind-Bot” is not supposed to hit the walls while traversing through it, failing which, penalities will be given as per the scoring table.
  • Way points are provided at every turn in the maze. These are 50 x 50 millimeter black squares on white background. The “Blind-Bot” is allowed only to sense these way points if they wish to, and verify its course. No other sensing of the 'environment' is allowed for the “Blind-Bot” although self sensing like using shaft encoders etc, are allowed.
  • Though there are way-points for the blind-bot, travelling through the walls without using sensors for sensing the way-points will be awarded bonus points.


  1. Every line is of width 25 millimeters, black in colour, on white background.
  2. The gap in between the walls is the exact mirror image of the 'Line' half of the arena. The mirror image is assumed in the sense that a mirror is placed in between the 'Line' half and the 'wall' half of the arena. It is as though an imaginary line is drawn in between the walls which is the exact mirror image of the line in the other half.
  3. The gap between the walls of the maze is 400 millimeters on parallel stretches and goes roughly upto 565 millimeters at the sharp turns (similar to the case of the diagonal gap for a 90 degree turn of 2 parallel walls. In all other cases, the gap between the walls is maintained to be 400 millimeters.
  4. Check this place for more updates.


Every dimension described in the arena is subject to a tolerance of 5%. In case of discrepancies, the decision of the organizers is final and binding.



  1. The “Blind-Bot” should be within the dimensions of 300 x 250 x 200 millimeters (L x B x H).
  2. The dimensions of the “Sensing-Bot” should be within 300 x 300 x 300 millimeters (L x B x H).
  3. The Potential Difference between any two points in a robot should not exceed 12V. However a tolerance of 2V will be considered for overcharge.
  4. Both the “Blind-Bot” and the “Sensing-Bot” must have on-board power supplies.
  5. The “Blind-Bot” should not have any sensors for sensing the environment around it except for sensing the way-points though it is optional. Shaft encoders and other sensors for sensing the robot's movement with respect to itself ( Not with its surroundings in any way!) are also allowed.
  6. Communication: The robots should communicate with each other only using a RF transceiver with 2 operating frequencies.
  7. Use of onboard camera is prohibited.
  8. The organizers reserve the right to disqualify any bot that is found to not adhere to the specifications.
  9. Check this place for more updates.

The following circumstances will lead to immediate disqualification

  • The robots try to damage the arena.
  • Any team member enters the arena during the trial.
  • Handling of the robot during run even for reseting without the approval of the organizers.
  • Any external manual signal is given to the robots.
  • “Blind-Bot” using sensors for sensing its environment other than the way-points.
  • Check this place for more updates.



Situation Description



Least Time taken in seconds for the “Blind-Bot” to traverse through the walls and cross the maximum number of way-points in any trial.



Number of times the “Blind-Bot” has hit the wall.



Number of times the “Sensing-Bot” has deviated the line and moved elsewhere.



Number of Resets of either bots due to stopping of the bot.



Maximum number of Way-Points crossed by the “Blind-Bot” among all the trials.



Option of Sensing the Way-Points executed or not. (F = 0, if option executed; else, F =-50).



Number of Trial Runs taken in total.


The total score is calculated as per the following formula:

Total = (G*A) + [ (20*B) + (10*C) + (15*D) + {360*(Etotal – E)}] + F.

The team with the least points win.

Check this place for more updates!


  • A maximum of 4 members are allowed per team.
  • A total of 20 minutes will be alloted per team. Teams may split this time into a maximum of three trials.
  • All students with prior registeration in the user portal in the Pragyan site, along with a valid identity card of their respective educational institutes are eligible to participate in this event.
  • Check this place for more updates.

Aravind K  

  +9194448 33470

Ashutosh Dhar

  +9198945 06063

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