International Journal of Scientific and Research Publications, Volume 4, Issue 4, April 2014 1 ISSN 2250-3153 www.ijsrp.org A Technological Survey on Autonomous Home Cleaning Robots Abhishek Pandey ,Anirudh Kaushik, Amit Kumar Jha,Girish Kapse Dept. Of Electronics and Telecommunication, Army Institute of Technology, Pune-411015 Abstract- In this present era, people live a very busy life. People in cities have irregular and long working times. In such a situation a person will always find ways of saving time. household chores are the ones that are most dreaded upon. And cleaning a home tops the list. It is not only time consuming, but also its very tiring. Especially for working women it becomes difficult to handle both home and office work together. She has to do the household chores in the morning, go to work and do the works there and return home in the evening to again start her chores at home. Thus she lives a dual life. In this dual life, we thought of gifting her away of saving some of her precious time. The requirement of a House Cleaning Robot is born. For saving time we needed an automatic system that cleans on its own without human interventions. Also, we did think about how to aid people with physical disabilities. Since we had to do this, we knew that we needed a cleaning system that could work in accordance to what we say, thus helping a physically disabled person. Index Terms- house cleaning robot, automatic system I. INTRODUCTION he house cleaning robot uses a microcontroller to detect obstacles and manipulates its direction as per the inputs from infrared sensors mounted in front, right and left of the robot or the digital signal processor. The heart of the system is a microcontroller. It is programmed to accept inputs to sense obstacles around it and control the robot to avoid any collisions. There are 4 IR sensors used in this project- one at the front, and the remaining on the left, right and back of the robot to detect obstacles, if any. In case of an obstacle, or a potential collision, the microcontroller controls the wheels of the robot by a motor driver to avoid collision. The vacuum cleaner mounted on the robot performs the cleaning process [1]. Auto mode: In this mode, the microcontroller is programmed in such a way that it takes the decision and changes the path of the robot as per the sensor inputs to avoid the obstacles. A timer is used to set the time limit for the cleaning process. II. SYSTEM BLOCK DIAGRAM Figure 1: Block diagram of proposed design [1] A. BLOCK DIAGRAM EXPLANATION 1) DC power unit This block consists of a 12 V rechargeable battery and a voltage regulator. The LM7805 IC connected to the output of the battery, provides a constant output of 5V [2] regardless of the load in the circuit. Thus the power requirements of the system are strictly met without putting the system at risk during high loads. 2) Microcontroller The microcontroller is the heart, which makes the system automatic. The microcontroller reads the signals from the IR sensors and the digital signal processor. It then processes this data and controls the movement of robot by giving signals to the motor driver. 3) IR sensors An astable multivibrator, an IR LED and an IR sensor TSOP1738 constitutes the IR sensor block. Here we use four pairs of IR LED and sensor for the automatic operation of the House Cleaning Robot. The multivibrator is set to produce square wave oscillations at a frequency of 38 kHz [2] . The output of the multivibrator drives the IR LEDs. When an obstacle comes in front of the robot, the IR rays gets reflected from the obstacle and falls on the IR sensor, which turns the normally high output of sensor to off. It controls the movement of robot according to the output of the IR sensors. 4) Motor driver circuit T