09-07-2012, 11:45 AM
Identifying objects using RF Transmitter and Receiver and retrieving data using GSM
rf transmitter.pptx (Size: 434.36 KB / Downloads: 71)
OBJECTIVE
In this project we are going to design a system for monitoring and locating objects using Radio Frequency (RF) transmitters and receivers, and querying about the objects using mobile phones.
EXISTING SYSTEM
In this system, there is no device to monitor and locate the lost objects.
Hence its needs a manual power to control and monitor the objects. So it is very difficult for identifying that lost objects.
PROPOSED SYSTEM
In this project, we are going to monitor the lost object by using RF communication. Here the RF transmitter is attached with object.
Then on the receiver side there is a GSM modem and LCD module which is interfaced with the microcontroller. Whereas when the receiver receives the signal from the object, it will send a message to the appropriate person and give the information about that object.
List Of Modules
MODULE 1: 8051 MICROCONTROLLER
MODULE 2: RF MODULE
MODULE 3: MAX 232
MODULE 4: GSM MODEM
MODULE 5: LCD
MODULE 3: Max 232:
The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply RS 232 voltage levels from a single 5v supply. Each receiver converts RS-232 to 5v TTL/CMOS levels. Each driver converts TLL/CMOS input levels into EIA-232 levels. The P3_0 (RX) and P3_1 (TX) pin of controller is connected to the max 232 driver and the TX and RX pin of max 232 is connected to the GSM modem or PC.
MODULE 5: Liquid crystal displays:
The LCD standard requires 3 control lines and 8 I/O lines for the data bus.
The 8 data lines are connected to PORT 1 of 8051 microcontroller. The three control lines( RS,RW and EN ) are connected to PORT 3.5,3.6 and 3.7 respectively.
ADVANTAGES
Easy to implement
Low cost
We can identify the lost object easily.
APPLICATION
Locating landmarks in a city
Managing items in a warehouse
Usage as emergency services
Locating personal objects
Organization support
CONCLUSION
Thus a system can be designed for monitoring and locating objects using RF transmitters and receivers.
REFERENCES
Rappaport T.S, “Wireless Communications: Principles and Practice”, 2nd edition, Pearson education.
Jochen Schiller. Mobile Communications. Pearson Educational Limited, 2003.
Andrew S Tanenbaum. Computer Networks. Pearson Educational Limited, 2003
Mazidi , The 8051 Microcontroller and Embedded Systems
2nd Edition, 2009
http://microcontroller51.blogspotp/8051-...s-new.html
MICROCONTROLLER BASED PROJECTS for final year electronics « IndianEnginee