11005-Me Line Follower

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Sommaire

[modifier] Documentation

http://learn.makeblock.com/en/me-line-follower/

Me Line Follower V2.2 module is designed for the line following robotics. It has two sensors on the module and each sensor contains two parts – an IR emitting LED and an IR sensitive phototransistor. It can output digital signal to Arduino so the robot can reliably follow a black line on a white background, or vice versa.

[modifier] Spécifications techniques

  • Operating voltage: 5V DC
  • Detection range: 1~2cm
  • Detection angle: within 120°
  • Control mode: Double-digital port control
  • Module dimension: 51 x 24 x 21mm (L x W x H)
  • Connecting with RJ25

[modifier] Programmation Arduino

The function of the code segment is: to read the results detected by the sensor of Me Line Follower continuously and output the results to the serial monitor in Arduino IDE every 200 ms. Me Line Follower-Arduino.png

[modifier] Programmation Scratch

This program can make the panda identifying and speaking out the operating state of the Me Line Follower. Me Line Follower-Scratch.png

[modifier] Fichier d'exemple

Fichier:Sensor.sb2

[modifier] Principle analysis

Me Line Follower is an accessory of robot developed on the principle of reflective photoelectric sensor. The infrared light features different reflection intensity when irradiating on different color of object surface. In the process of running, the cart irradiates infrared light on the floor continuously. When the infrared light reaches white paper floor, diffuse reflection occurs and the reflected light is received by a receiver mounted on the cart. If the infrared light reaches black line, it is absorbed and can not be received by the receiver of cart. By identifying whether the reflected infrared light is received, we can determine the position of black line and the running line of cart. (The output is 0 when irradiating to a black line, and the output is 1 when irradiating to a white line).

[modifier] Schematic

http://learn.makeblock.com/en/wp-content/uploads/2016/01/1-80f60e3f9c.jpg

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