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Intelligent lighting system design

An automatic lighting system , an automatic temperature control system and status monitoring system is described here.

The automatic lighting system is implemented with the help of a state synthesizer, which generates the next state with the help of present state and sensor inputs. For the purpose a program is written and the artificial intelligence is created by burning that program into a microcontroller that emulates the function of a state synthesizer. Here due to the project limitations we are introducing the intelligence to four sections of the room in which automatic lighting is to be brought. The room is logically divided into 3,namely c0,c1,c2(c=cell)equally.

And the logical partition is based on two quantity-sensor pairs (like laser-LDR or IR-IR Sensor) namely,l0&l1.There is two sets of quantity-sensor pairs at the door side to detect the direction of travel of the humans(l2&l3).

After the state identification, we need to glow the corresponding array of LED’s .Also the project includes the room light intensity control according to the ambient light so that the total light inside the room is a constant.

The light intensity control is done through the help of a PWM generator, which generates the PWM corresponding to the input value given as input to the PWM generator, so that the light intensity of the LED array varies according to the ambient light inversely .The PWM generator is implemented with the help of a microcontroller with sensor input to PWM program burned in it.

The temperature control is done through the speed control of fan. For the demonstration purpose we are introducing a dc motor and speed control of it. For the purpose we generate PWM according to the temperature value and drive the motor. The result will be a varying fan speed according to the temperature.

DISPLAY INTERFACE:

Display interface is to be done with the help of a pc or a microcontroller with LCD display. Display unit mainly displays the current status of the room like in which section the human concentration is high and the total number of persons inside the room, and finally the temperature of the room.

The program for the state synth and other details are available in electronic error.

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