Autonomous event

Autonomous Event


The labyrinth to the National Treasure ain’t easy, and definitely beyond our scope because it’s entrapped in debris. Furthermore, the gate to the treasure is opened only by knowing the correct volume of blocks of specific physical characteristics, which perhaps shows skilled ancient architecture. We need to build up a bot on which this engulfing task can be assigned.


  • Detecting dimensions of objects (Length, Breadth, Height)

  • Line following

  • Dual axis traversal of sensor(s)

Problem Statement

To Build a robot capable of detecting the dimensions of the block to estimate the volume of the block and then indicate the increasing order of volume of blocks.

General Description and Event Setup

  • There will be blocks in the arena each of different height and length.The breadth will also vary for the 2nd round. The bot has to measure the length and height of each blocks.(breadth as well for 2nd round).

  • A finish zone will be present in the centre of the arena where the bot has to reach at the end and show the increasing order of volume of the blocks by blinking LEDs present on the bot.



Note - The distance of the centre of the block will be 8.5 cm from the edge of the line.


Note: All the above mentioned dimensions are in cm.

Arena specifications
  • The outer dimensions of the arena will be 200 x 200 cm.

  • There will be a square at the centre.

  • The width of the lines will be 3cm.

  • Dimensions of the arena are to be considered with a maximum tolerance of 10%.

Block Specifications
  • For the 1st round, breadth of the blocks will be fixed to 10 cm, whereas the height and length will be variable.

  • The dimensions of the blocks may vary from 4cm to 10cm.

  • For the 2nd round,length, breadth and height of the blocks will vary.

  • All blocks will be white in colour.

Robot Specification
  • The robot must fit in a box of 25cm x 25cm x 25cm with a tolerance of 10% in the dimensions of robot.

  • No part/mechanism of/on the bot should exceed the given dimensions before the commencement of the event. However the dimensions can change during the course of the run.

Event Rules
  • The robot should traverse the arena only by using the line following mechanism.

  • Points will be awarded for correct scanning the dimensions of blocks during the run and indication of the correct order of the blocks of the blocks at the end of the run.

  • Participants are not allowed to touch the blocks while scanning them. Negative points will be awarded for touching or displacing the block.

Restarts and Timeouts
  • A maximum of 2 Timeouts of 1 minute each may be taken. Penalty will be awarded for each timeout and robot will start from its stopping position on the arena.

  • The participant’s robots can have a maximum of 2 restarts. A penalty will be imposed on the team for every restart that they take.

  • After the restart, the participant’s robot will be set to its initial position. Timer will be set to zero and the run will start afresh with the addition of the penalty for restart.

  • A timeout can be taken anytime at the user’s discretion.

  • A restart can only be taken if there is a genuine technical fault in the robot. Team ROBOTIX may refuse a restart if the reason does not sound genuine enough, and their decision will be binding and final.

Round 1

  • There will be four blocks.

  • The bot has to traverse through the centre loop and go near each block.

  • The bot has to estimate the length and height of the block.

  • Thus by measuring the length and height, the approximate volume of the blocks will be calculated.

  • Now the bot has to go to the central node of the arena and then blink the LEDs in the order of increasing volume.

  • Maximum time for Round 1 will be 5 minutes. A restart will only be given before 3 minutes into that round.

Round 2

  • There will be four blocks.

  • All the three dimensions of the block will be variable.

  • Each of the blocks can be accessed from two nodes.

  • Thus, the bot has to scan the block from each of the nodes and thus estimate its volume.

  • After calculating the approximate volume, the bot has to go to the central node and blink the LEDs in the order of increasing volume.

  • Maximum time for Round 2 will be 8 minutes. A restart will only be given before 5 minutes into that round.

EXAMPLE:For example, the dimensions of the blocks are as follows-
1st block : 5X5X10 , Volume = 250
2nd block : 10X8X8, Volume = 640
3rd block : 9X9X12, Volume = 972
4th block : 7X7X7, Volume = 343
Thus the correct order of increasing volume would be 1<4<2<3

Scoring Formula
  • Positives

    • Base score: 1000

    • Reaching each node to scan the block : 50 (Q)

    • Bonus for completing all scanning and reaching centre node : 200 (R)

    • Correct indication of order : 200 (for each pair of blocks) (S)

    • Time Bonus : F(S) X T (T is equal to the time remaining in seconds at the end of the run). F(S) = S - 3 for S>=3 and F(s) = 0 for S<3. ‘S’ has been defined in the above point.

  • Negatives

    • Displacing or touching the block : 100 (A)

    • Incorrect indication of order : 200 (for each pair of blocks) (V)

    • For each timeout: 100 (L)

    • For each restart: 150 (O)

    • For exceeding time limit : 5 (E), E is the excess time after prescribed time in seconds.

    • For damaging arena: 400 (B)


1000 + 50*Q + 200*R + 200*S + F(S)*T - 100*A - 200*V - 100*L - 150*O - 5*E - 400*B


For order indication, blocks will be compared in pairs in terms of relative size. So in total 6 comparisons will be made for 4 blocks. It can be understood with the following examples-

  • Example 1:

Correct order of blocks - A>C>D>B
Blinked order of blocks - C>B>A>D

Time taken = 3 minutes So here all the 4 blocks are compared in pairs :

  1. C>B : positive
  2. C>A : negative
  3. C>D - positive
  4. B>A - negative
  5. B>D - negative
  6. A>D - positive

So net marks earned for block order identification : 3X200 - 3X200 = 0
Time bonus = F(S)X(5-3)X60= 0 X 2 X 60 = 0
Total= 0

  • Example 2:

Correct Order of blocks - A>C>D>B
Blinked Order of blocks - C>A>D>B

Time taken = 6 minutes So here all the 4 blocks are compared in pairs :

  1. C>A : negative
  2. C>B : positive
  3. C>D : positive
  4. A>D : positive
  5. A>B : positive
  6. D>B : positive

So net marks earned for block order identification : 5X200 - 1X200 = 800
Time Bonus = 0 ( as time has exceeded) Time Exceed penalty = 5X(6-5)X60 = 300 Total = 800-300 =500


  • The participating team must inform before the run how they will show the order of the blocks.

  • One approach maybe using 4 LEDS and blinking the LEDs in the correct order, for example if the order is 4 1 2 3 then the participant will blink the 4th LED and then 1st and so on.

  • The order ( which block is first or second) will be determined by the order in which the bot scans the blocks, the block first scanned by the bot will be considered first.

General Rules
  • Maximum number of participants allowed per team: 4 people.

  • The participants will be provided with 220 Volts, 50 Hz standard AC supply.

  • Only 16 bit microcontrollers or below will be allowed.

  • Participants will have to arrange for any other power supply required for their robot.

  • Teams cannot tinker with their robots during the run.

  • LEGO kits or its spare parts are not allowed.

  • The decision of the Team Robotix will be final and binding.

  • The rules are subject to change.

It is suggested to the participants to try making a wireless robot, powered by a battery on-board.

Links to Tutorials:

For relevant tutorials check ROBOTIX TUTORIALS.

Rohit Ner


Ph. no: +91 9167401706

Aditi Singh


Ph. no: +91 7478085999