Mars Exploration

Main Mission Objectives
1. Follow the Path
  1. Possible Solution
    1. Use the colour sensor to detect the black path and white foreground then use the data to move both motors alternately
  2. Requirements
    1. Colour Sensor (reflected light), Large Left Motor, Large Right Motor
  3. Description
    1. The EV3 need to be able to traverse the track (as seen below) and has to follow the set path which includes; sharp turns, long curvy bends and etc.
2. Navigate Around Objects
  1. Description
    1. Using both the touch sensor and ultrasonic sensor determine if an object is moveable if they follow the criteria; If the object is in front of the EV3, If the touch sensor is pressed. If they are met then the object is moveable and the code resumes, If not then the EV3 needs to move around the object then It needs to resume the line following algorithm
  2. Possible Solution
    1. The EV3 needs to detect both the included moveable and immovable object and take the correct course of action, while retaining the line following
  3. Requirements
    1. Colour Sensor (reflected light), Large Left Motor, Large Right Motor and Touch Sensor with spike Ultrasonic sensor
Extension Mission Objective
1. Celebration Dance
  1. Description
    1. The EV3 will need to perform a dance once it has completed both ends of the track. However before the dance starts the EV3 must interpret information that communicates the course is over.
  2. Possible Solution
    1. Have a loop statement that limits the amount of times that the code runs, then implements a dance using the arm motor and single motor movement on the EV3
  3. Requirements
    1. Left Large Motor Right Large Motor Arm Medium Motor
2. Complete the full path
  1. Description
    1. The EV3 needs to move through the track, then when it arrives at the green circle it has to redo the course in the opposite directions.
  2. Possible Solution
    1. Reconfigure the line following code so that it can function at both start areas and is able to handle the obstacles in both directions
  3. Requirements
    1. Colour Sensor (reflected light), Large Left Motor, Large Right Motor, Touch Sensor with spike Ultrasonic sensor
Elements to the Project
1. EV3 Components
  1. Motor
    1. Large
      1. Description
        A motor that runs at around 160-170 RPM and has a torque of 20Ncm (newton centimetre) therefore being a motor generating more force but at a lower speed. It also contains a built-in rotation sensor that optimised for precision controls on the EV3
      2. Use Case in the Project
        Celebration Dance, The Line Following, Obstacle Avoidance and Object detection
      3. Constraits
        Only 2 Large Motors are allowed and are only allowed for the wheels
    2. Medium
      1. Constraints
        Only 1 medium Motors are allowed and they are only allowed for the arm.
      2. Description
        The medium motor has a torque of 8Ncm (newton centimetre) and a RPM of 240-250, meaning it generates more speed but at the cost of force. It also contains a built-in rotation sensor that optimised for precision controls on the EV3 however, due to the smaller size it is able to react more quickly.
      3. Use Case in the Project
        Celebration Dance
  2. Sensor
    1. Colour Sensor
      1. Description
        The Colour Sensor has 3 option changing the use case of itself and those are:
        Reflected light intensity – In Reflected light intensity mode, the colour sensor discharges a red light and then measures the amount of light reflected back from the surface its on. The intensity is measured through percentage with 0% being dark and 100% being bright
        Ambient light intensity – In this mode, the colour sensor detects the amount of light in its environment.
        Colour – In the colour mode, the colour sensor can detect up to seven different colours: black, blue, green, yellow, red, white, and brown. This then is shown through the means of a unique value.
      2. Use Case In Project
        Line Following
      3. Constraints
        Only 1 colour sensor is allowed
    2. Touch Sensor
      1. Description
        The touch sensor gives your robot a sense of touch. The touch sensor detects when it is being pressed or released.
      2. Use Case in Project
        Obstacle avoidance, Object detection and Celebration Dance
      3. Constraints
        There can only be one touch sensor on the EV3 without the additional spike bit
    3. Ultra Sonic
      1. Constraints
        There can only be one Ultrasonic sensor on the EV3
      2. Used Case in Project
        Object Avoidance and Object detection
      3. Description
        The Ultrasonic Sensor is able to transmit and detect ultrasonic waves as far as 255cm or 10 inches due to waves then bouncing back a result the EV3 is able to detect nearby objects or receive ultra sonic sounds from other EV3.
2. Coding Elements
  1. Line Following
    1. Require Code Blocks
      1. Is the PT value </>/= than ___ is an important part towards the line following algorithm since it helps differentiate between the black white values
      2. The Start moving at ___ , ___ % is important for the line following code since sets the speeds the large Motors move at and especially in the set course which has sharp turns and curvy bends.
      3. Forever Loops are require for the line following code because it allows the code to loop forever meaning it can around the course back and forth without stopping
      4. The If Else statement aids in line following since it interprets the data from the colour sensor and picks the best option out of the 2 option it was programmed with.
    2. Sample Code
  2. Object avoidance/detection
    1. Required Code Blocks
      1. Forever Loops are required for the line following code because it allows the code to loop forever meaning it can the detect objects continuously through the course and when an object is detected it takes the right course of action
      2. The If Else statement aids in line following since it interprets the data from the touch and ultra sonic sensor and determine wether to continue through the path or move around it.
      3. Forever Loops are required for the line following code because it allows the code to loop forever meaning it can the detect objects continuously through the course and when an object is detected it takes the right course of action
      4. ___ and ___ variable state the requirements for to the if option within the if else statement therefore giving allowing for a more rigid code
      5. If the ultrasonic sensor detects an object from ___ cm is one out of 2 variable inside the if else statement this is essential for initially detecting the
      6. Is __ touched? is the 2nd variable and determine if an object is moveable since there is a force threshold before it detects being pressed
    2. Sample Code
  3. Celebration Dance
    1. Required Code Blocks
      1. The If Statement is essential since it determines when to do the celebration dance. Therefore preventing the possibility of it starting during the course traversal
      2. Move Motor__ for ___ rotations/Seconds/Degrees is essential since it allows for movement for one certain motor in our case the medium one, this then prevents the EV3 from leaving the set bounds of the map EV3
      3. Play Beep at ___ is important since its the easiest block to program music for but, it also allows for the most freedom.
    2. Sample Code
Constraints
1. Has to be completed within 4 weeks
2. Has to achieve the primary Goals
3. Has to achieve through the education build of the EV3
4. Has to use the EV3 Software
5. A sample Algorithm must be provided

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Mars Exploration

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	Created by Ray Dew almost 4 years ago