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IR Controlled Robotic Vehicle
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Introduction
IR Controlled Robotic Vehicle
To control a Robotic vehicle using a standard TV remote. IR sensor is interfaced to the control unit on the robot for sensing the IR signals transmitted by the remote. This data is conveyed to the control unit which moves the robot as desired. An 8051 series microcontroller is used in this project as control device.
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IR Controlled Robotic Vehicle
Block Diagram
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IR Controlled Robotic Vehicle
Hardware Requirements
• 8051 series Microcontroller• IR Sensors• DC motors• Motor Driver IC• Crystal• Resistors• Capacitors• Voltage Regulator• Battery• Robot Body
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IR Controlled Robotic Vehicle
Software Requirements
Keil compiler
Language: Embedded C or Assembly
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IR Controlled Robotic Vehicle
Microcontroller
It is a smaller computer
Has on-chip RAM, ROM, I/O ports...
RAM ROM
I/O Port
TimerSerial COM Port
Microcontroller
CPU
A single chip
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IR Controlled Robotic Vehicle
Internal Structure of A Micro Controller- AT 89S52/51
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IR Controlled Robotic Vehicle
Microcontroller Pin Description
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IR Controlled Robotic Vehicle
TSOP 1738 Photo detector and preamplifier in one package
Internal filter for PCM frequency
Improved shielding against electrical field disturbance
TTL and CMOS compatibility
Output active low
Low power consumption
High immunity against ambient light
Continuous data transmission possible (up to 2400 bps)
Suitable burst length .10 cycles/burst
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IR Controlled Robotic Vehicle
Description TSOP 1738
The TSOP17 – series are miniaturized receivers for infrared remote control systems.
PIN diode and preamplifier are assembled on lead frame, the epoxy package is designed as IR filter.
The demodulated output signal can directly be decoded by a microcontroller.
TSOP1738 is the standard IR remote control receiver series, supporting all major transmission codes.
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IR Controlled Robotic Vehicle
DC- MOTOR
A DC motor is an electric motor that runs on direct current (DC) electricity. In any electric motor, operation is based on simple electromagnetism.
A simple 2-pole DC electric motor (here red represents a magnet or winding with a "North" polarization, while green represents a magnet or winding with a "South" polarization).
Every DC motor has six basic parts -- axle, rotor (a.k.a., armature), stator, commutator, field magnet(s), and brushes.
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IR Controlled Robotic Vehicle
Working Principle
Transmitting end uses a TV remote through which IR commands are transmitted.
At the receiver end, these commands are used for controlling the robot in all directions.
Such as forward, backward and left or right etc.
At the receiving end the movement is achieved by two motors that are interfaced to the microcontroller.
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IR Controlled Robotic Vehicle
Working Principle
RC5 based coded data sent from the TV remote is received by an IR receiver interfaced to the microcontroller.
The program on the microcontroller refers to the RC5 code to generate respective output.
Based on the input data to operate the motors through a motor driver IC.
The motors are interfaced to the control unit through motor driver IC.
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IR Controlled Robotic Vehicle
Applications
Remote control robotic vehicles have various scientific uses including hazardous environments.
Can be used by Military and Law Enforcement agencies.
Can be used for Search and Rescue operations.
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IR Controlled Robotic Vehicle
Advantage
Low cost.
Simple TV remote controls can be used as controllers.
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IR Controlled Robotic Vehicle
Disadvantage
Limited range of control.
Needs to be line of sight.
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IR Controlled Robotic Vehicle
Future Enhancement
Further the project can be enhanced by DTMF technology. With this technology we can control the robotic vehicle by a cell phone. This technology has an advantage over long communication range as compared to line of sight communication in IR technology.
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IR Controlled Robotic Vehicle
Conclusion
This project is used to control robotic vehicle by using IR remote. IR sensor is interfaced with microcontroller on the robot for sensing signals from remote. Infrared control requires “line of sight” in order to function; the receiver must be able to “see” the transmitter at all times in order to receive data. Infrared remote controls (such as universal remote controls for televisions) are used to send commands to an infrared receiver connected to a microcontroller which then interprets these signals and controls the robot’s actions.
