BUILDING LIGHTING AUTOMATIONTHROUGH INTEGRATION OF DALI WITHWIRELESS SENSOR NETWORK
INTRODUCTIONEnergy demand is the rising problem in today’s world.So it is necessary to solve the energy crisis problem.It is essential to monitor the energy consumption in Buildings.
This project focuses on the integration of Digital Addressable Lighting Interface (DALI) devices in wireless sensor networks – e.g. heating ventilation and air conditioning, lighting control, alarms, etc.Final building automation system has different subsystems which are finally taken to an integrated building management system.The main purpose of this project is to provide a wireless sensor network which acquires the data from the sensing
Where the automation control technique automatically detect the human interference neglecting the object or material things, it turns on/off the electronic appliances.And also we apply automation lighting technique where depending upon the intensity of light the sensor controls the objects.
BLOCK DIAGRAM Tx: M LDR I C R HT12E O C O Reset N T R O RF TX L X tal L E R
BLOCK DIAGRAM Rx: M LCD LOAD1 RELAY1 I C R O C O LOAD2 RELAY2 N HD12D T R O L L E RF Rx LOAD3 RELAY3 R
SensorSensor is used to sense the physical quantity and convert in to electrical signal. Here LDR and IR sensor are used.LDR is light dependent resistor, it is used to sense the light intensity.when the light intensity is more the lamps are turned off and when it is less the lamps are turned on.
X-tal Crystal OscillatorA crystal oscillator is an electronic oscillator circuit.The Oscillator uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency.
MicrocontrollerWe can use many type of controller like PLC, PID microcontroller But here we are going to use embedded controller.From the sensor you are getting analog signals so we have to convert the analog signal in to digital signal by using opt coupler.
Encoder/decoderAn encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another.A decoder is a device which does the reverse operation of an encoder, undoing the encoding so that the
RF Transmitter/ReceiverTransmitter transmits the data when the signal Tx ready is in high.When the signal Txmt is high the receiver is ready to receive and the signal Rx ready goes to high and it receives the data.An Rf receiver receives the signal from the atmosphere, from its own
LCDIt displays the output from thee microcontroller.To Verify the Entire Process of working Carried out.
RelayRelay is a electromechanical switch. After giving supply nc gets changed in to no and no gets changed into nc.We can use many no of relays depending upon the application used
ConclusionThe major advantage of this project is to reduce the man power, power consumption cost.It is very useful in urban houses, offices, hospitals, Old and Physically challenged people.