05-05-2012, 02:00 PM
FIRE DETECTION AND EXTING UISHER ROBOT/DISPLAY TEMPERATURE OF THAT LOCATION TO ASSIST
LGRB004_Synopsis.doc (Size: 760 KB / Downloads: 67)
To construct a remote controlled prototype of a fire fighter robot that can fire extinguisher. In this project, we use sprinkler system that is controlled depending on the surrounding temperature. It is a versatile project with application in almost every place, be it residential or industrial.
This is deign in two parts one is remote and other is rover along with fire extinguisher. Remote has four switches for driving the robot in forward, backward, left and right. When rover is at fire position, then fire sensor (DS18B20) detect the fire (specific temperature) and signal given to the microcontroller, microcontroller show the temperature on 16*2 LCD and simultaneously energize the relay and then water motor is on. When temperature is below specific level then water motor is off automatically. The on/off action of water motor is automatic and depends on temperature. Full working is shown in block diagram.
BLOCK DIAGRAM FOR ROVER:
REMOTE
ROVER
DESCRIPTION
The complete working of rover can be divided in the following blocks for easier understanding:
1. REMOTE CONTROL: The remote control is essentially a RF transmitter that transmits encoded signals. It can be further classified into following parts:
PUSH TO ON SWITCHES: This part controls the motion of the robot. They are four in number. Using them you can make the robot move forward, backward, clockwise and anticlockwise. They are connected to the encoder.
ENCODER: This part converts the states of the switches into an encrypted data that can be transmitted over RF channels. The encoder used here is HT12E which can be used to encrypt 4 bit data. The encrypted data is a serial digital signal.
TRANSMITTER: This part takes the encrypted data from transmitter and transmits it in form of Radio Frequency. The transmitter used here is ASK 315 MHz RF-TX modules.
POWER SUPPLY BLOCK: This consist a 9V power supply source and a power regulator (7805) to get 5v power supply. This 5v supply drives the transmitter and the encoder.
ROVER:
It can be classified into following parts:
RECIEVER: It receives the encrypted data in form of RF waves and converts it into electronic signals. The receiver used here is ASK 315 MHz RF-RX modules.
DECODER: This part decrypts the data to yield the states of the switches. HT12D has been used here which is compatible with HT12E module. The output is this IC is in a 4 bit format. This data is fed into the motor drivers.