- Slides: 16
Line Follower Sensor
Introduction of Line follower sensor • Line follower sensor detects the black and white colour to move along the line. • It works on Laws of reflection and absorption • As white colour reflect more and black reflects less light, so it will detect these colours • It uses two pair of IR(Infrared) sensors. One pair has one transmitter bulb and one receiver bulb.
Working Principle You can see the working process of IR sensor
Working Principle • The IR transmitter will emits the infrared signal on surface, according to colour of surface the reflection of infrared signal take place • If surface is bright it will reflect more light and if surface is dark the reflection will be less • Due to this property of bright & dark surfaces our Line follower sensor can distinguish between white & black colour
Working modes • Line follower sensor has four modes as we have two pair of IR transmitter & receiver in our sensor • First mode –When both the sensors detect black colour its value become “ 0”
Working modes • Second mode –When left sensors detect white colour & right sensor detects black its value become “ 1” • Third mode - When left sensors detect black colour & right sensor detects white its value become “ 2”
Working modes • Fourth mode –When both the sensor detects white its value become “ 3”
Some Applications of Line follower sensor • In Assembly lines to follow particular path • In hotels & restaurants to provide services
Let’s make program on m. Bot using Line follower sensor 1. Program for m. Bot to follow black line Logic of the program 1. If line follower sensor value is “ 0” move m. Bot in forward direction 2. If value is “ 1” take left turn to move m. Bot towards black line 3. If value is “ 2” take right turn to move m. Bot towards black line 4. If value is “ 3” take any turn to move m. Bot towards black line
2. Program for m. Bot to establish a response between line follower & light sensor Logic of the program is move the robot in line follower mode but speed will be depend on intensity captured by light sensor. More the intensity more will be speed.
3. Line follower with Obstacle detection Logic of the program 1. start the m. Bot 2. Follow the black line as per line follower sensor value provided that obstacle is not in the range of 3 to 10 cm 3. If the obstacle is detected while following the black line stop the robot & play sound
Bluetooth communication Applications • As the robot can be fitted with a wide range of sensors, using it can facilitate us in the collection of information. It therefore allows us to enter the domain of Io. T, the current mainstream internetworking area, easily. Of which Bluetooth communication being the key technology. • Coupled with the fact that mobile phones are now like a part of our arm, resulting in Io. T being realized in our lives in general. Whether it is for schoolwork, work or entertainment purposes, the mobile phone’s Bluetooth device is an important part in the realization of Io. T.
Connection of Bluetooth with Mobile
m. Bot controlling window on Mobile You have so many options to control your m. Bot via android application