Smart fan for human tracking

Now a days the home environment is introduced with a network enabled digital technology. This type of home automation increases the connectivity of smart equipment within the room. With the continuity of home automation we have designed a circuit which will track the person in the living room by using ultrasonic distance sensor. Previous research of human tracking was done depending on IR and PIR sensors. IR sensor has a dead zone between 0-4 cm that means no object detection closer than 4 cm. PIR sensors are insensitive to slow motion or the body in standing mode. But ultrasonic distance sensors do not have gaps in the coverage zone like a PIR sensor and overall detection range is comparable to that of a PIR sensor. So in this research we have used ultrasonic distance sensor for easy exact human position tracking that rotates a fan independently to direct air flow to whatever position a person moves to in the room. In addition the fan includes another setting that allows controlling the speed of the fan depending on the room temperature. The position angle where the person moves to and the temperature of the room are displayed on the LCD. We are bored because of the limitation of conventional fans so we have designed the circuit.