cell phone operated land rover project presentation on electronics and communication department
Post on 23-Dec-2015
220 Views
Preview:
TRANSCRIPT
CELL PHONE OPERATED LAND ROVER
PROJECT PRESENTATION ON
ELECTRONICS AND COMMUNICATION DEPARTMENT
CONTENTS
• Introduction• Basic block diagram of project• Circuit diagram• Technology used• Components used• Software used• Algorithm• Advantages and disadvantages• Applications• Future scope• Conclusion• References
INTRODUCTION
• Aim of the project is to use a mobile phone to control a robotic arm mounted on a land rover
• Provides robust control, large working range and 16 controls.
• Control of robot involves 4 different phases:a) Perception
b) Processing
c) Action
d) Detection
BASIC BLOCK DIAGRAM OF PROJECT
MT
1.PERCEPTION
• First part is to make a call to the mobile phone which is attached to the robot.
• Next part is the decoding of DTMF tone generated by pressing a key in calling phone.
• Audio signal output from receiving phone is fed to DTMF decoder chip.
• Decoder chip converts DTMF tone into binary codes to be fed to microcontroller.
• MT8870 IC used as DTMF decoder in our project.
2. PROCESSING
• After perception stage, microcontroller processes the binary codes it receives.
• Microcontroller is pre-programmed in “C” to perform specific task according to input bits.
• Atmel’s ATmega16 is used for processing.
3. ACTION
• Final stage is rotation of motors based on input given by the microcontroller.
• Two DC motors of 30 rpm are used for the land rover and driven by motor driver IC L293D.
4. DETECTION
• For obstacle detection, a pair of IR transmitter and receiver is used along with buzzer.
• When the obstacle come near the robot, the IR transmitter will transmit the IR rays on the object and the object will reflect the IR rays to the IR receiver.
• The IR receiver will receive the IR rays and it will activate the buzzer.
CIRCUIT DIAGRAM OF MAIN PROJECT
OBSTACLE DETECTION CIRCUIT
DTMF SIGNALS AND DTMFDECODING CIRCUIT
• DTMF “Dual Tone Multiple-Frequency”.• Used in a telecommuncating signaling• The 16-keys touch tone pad.• DTMF assigns a unique ‘sound’ to each key.• Keys are arranged in a matrix of 4 columns
and 4 rows.
GROUPING OF FREQUENCY
• Signals generated by the superposition of two pure sinusoidal tones.•The DTMF signal generated is the sum of twosinusoidal tones.
DTMF DECODER IC
TRUTH TABLE FOR DTMF DECODER
ATMEGA16 MICROCONTROLLER
• Advanced-RISC architecture.• 16K bytes of In-System Programmable Flash
Program memory.• Internal and external interrupts.• 32 general-purpose registers.• High-performance, Low-power AVR 8-bit
Microcontroller.
FEATURES OF ATMEGA16
• Widely used.• Easily available.• Cost effective.• Speed of execution of instructions.• Flexible instruction set.• Vast documentation.• Easily available support and development
tools.
DIAGRAM OF ATMEGA16
DC MOTOR CONTROLLER L293D
• Microcontroller output is not sufficient to drive DC motors, so L293D is used.
• L293D comes in 16-pin DIP. It can provide current upto 600mA at voltages from 4.5V to 36V.
• It can be used to drive inductive loads such as relays, solenoids etc
• In the project it is used for simultaneous bi-directional control of two DC motors.
DC MOTOR CONTROL
ACTION PERFORMED CORRESPONDING TO THE KEY
PRESS
SOFTWARE USED
• The software is written in ‘C’ language
• Hex code for Atmega 16 is generated by using Code Vision AVR ‘C’ compiler.
• The next software we used is ‘EAGLE’ for circuit schematic design and layout design.
ALGORITHM
• STEP 1: START • STEP 2: DECLARE VARIABLES • STEP 3: SET PORT A AS I/P PORT • STEP 4: SET PORT D AS O/P PORT • STEP 5: ACCEPT INPUT • IF I/P IS 0X02 THEN MOVE MOTOR IN FORWARD DIRECTION • IF I/P IS 0X08 THEN MOVE MOTOR IN BACKWARD
DIRECTION • IF I/P IS 0X04 THEN MOVE MOTOR TO LEFT • IF I/P IS 0X06 THEN MOVE MOTOR TO RIGHT • IF I/P IS 0X05 THEN STOP MOVING MOTOR • STEP 6: STOP
ADVANTAGES
• Wireless control • Surveillance System. • Takes in use of the mobile technology which is
almost available everywhere. • This wireless device has no boundation of
range and can be controlled as far as network of cell phone
DISADVANTAGES
• Cell phone bill.
• Mobile batteries drain out early so charging problem.
• Not flexible with all cell phones as only a particular cell phone whose earpiece is attached can only be used.
APPLICATIONS
• Scientific
• Military and Law Enforcement
• Search and Rescue
• Recreation and Hobby
FUTURE SCOPE
• Password Protection
• Alarm-Phone Dialer
• Adding a Camera
CONCLUSION
• We have successfully implemented the entire circuit on the PCB with obstacle detection feature.
• Since all we need is a mobile call establishment to instruct the robot due to the cell phone’s unending and cheap availability, this is highly feasible.
• The level of sophistication is quite low and hence its working is user friendly.
• Project can also be subjected to standardization and hence has a good future scope.
REFERENCES
[1] Schenker, L, "Pushbutton Calling with a Two-Group Voice- Frequency Code” The Bell system technical journal, vol 14,no. 2, Jan 2006.
[2] M. Ali Yousuf, R. Montúfar Chaveznava, and V. de la Cueva Cueva Hernández, "Robotic projects to enhance student participation, motivation and learning", Hernández Current Developments in Technology-Assisted Education ,pp 922-952, July 2008.
[3] Robert Siwy, "Generation and Recognition of DTMF Signals with the Microcontroller MSP430", Texas Instruments Deutschland, October 2005.
[4] “Cell phone based land rover” Liu, Simon & Silverman, Mark. November 2009 [online] Available: http://www.instructables.com/id/Cellphone-operated-Robot/ [accessed:Jan 2013].
[5]http://www.datasheetcatalog.com/datasheets_pdf/M/T/8/8/MT8870.shtml
[6]http://www.alldatasheet.com/datasheetpdf/pdf/STMICROELECTRONICS/L298.html
[8]http://robosapiensindia.com/robomart/index.php?product_id=218&page=shop
Thank you!!!
top related