2.2: Project Description

Our project(Home automation system) consists of four main small systems

1. HAVAC(heat ventilation adaptive control)system.

2. Lighting control system.

3. Fire system

4. Security control system.

· Burglar security system.

HAVAC system :

• The temperature sensor (heat)detects if the temperature excess a certain degree , the fan will be activated .
• The ventilation activated according to a flicker logic it be on for a period of time (T1) and it will be deactivated for another period of time (T2) and T2 should be greater than T1 to keep ventilator from breakdown.

☺Note :the fan and ventilator can't be activated if there is a fire on the system.

Lighting system:

In this system we divide it into inside and outside lighting control system.

• For outside lighting there is a light detector , if it is dark or if there is no enough light outside the home , the outside lamps will be activated automatically.

• For inside lighting the lamps will be activated when the door is opened and still activated till the user presses the deactivated push button.

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Fire system

• The smoke sensor detects if there a fire which may be occurs on the system and the fire siren will be activated.

Security system:

• The burglar security system . it has its own start and stop push buttons . there is two photoelectric barriers on towards the main door and the other on the window of the home. If any of photoelectric barriers is interrupted the burglar siren will be activated till the user presses a stop push button.

☺Note: when the photoelectric sensor is interrupted the outside and inside lamps will be turned on and also the two siren.

So in our project we use (8 inputs) and (6 outputs)

→The inputs that we use :

• Start push button for the system.
• Stop push button for the system.
• Start push button for the security system.
• Start push button for the security system.
• Temperature sensor.
• Smoke sensor.
• Photocell sensor.
• Photoelectric sensor.

→The outputs that we use:

• Fan
• Ventilator.
• Siren for burglar.
• Siren for fire.
• Outside lamp.
• Inside lamp.

☺In the next chapters we will analyze each input and output and define it by using the ladder diagram(software) and we will define the steps of designing the control panel(Mimic) that consists of Leds and push buttons on the door of the panel and we put the PLC itself and Relays inside the panel and inside the panel and we make the isometric shape of the home that we put inside it the output and inputs

Then the wires that get out from the isometric shape will be collected together and get out from the home then connected to the panel that inside it all the wires to make the shape is beautiful .so it is discussed in details in the next chapters.