Virtually Controlled Semi-Automated Smart Home

IJSTE - International Journal of Science Technology & Engineering | Volume 2 | Issue 10 | April 2016 ISSN (online): 2349-784X

Virtually Controlled Semi -Automated Smart Home M. Susmidha B.E Student Department of Electrical &Electronics Engineering SNS College of Engineering Coimbatore, Tamil Nadu, India,

R. Tharani Daran B.E Student Department of Electrical &Electronics Engineering SNS College of Engineering Coimbatore, Tamil Nadu, India

R. Karthic B.E Student Department of Electrical &Electronics Engineering SNS College of Engineering Coimbatore, Tamil Nadu, India

K. Priyanga B.E Student Department of Electrical &Electronics Engineering SNS College of Engineering Coimbatore, Tamil Nadu, India

Mr. K. Karthikeyan Assistant Professor Department of Electrical & Electronics Engineering SNS College of Engineering Coimbatore, Tamil Nadu, India

Abstract This project deals with the system to monitor and control the ON and OFF status of the electrical appliances involved in home systems through HMI (Human Machine Interface) integrated PLC. The existing system has mechanical switches which are quite unsafe to use and the systems does not have the option to change the modes of operation. In this proposed system, lower energy consuming devices are used and operated at different modes according to human needs. Here all the appliances are controlled with the help of sensors and they are user programmed through HMI integrated PLC. Thus the signals from the sensors latches the PLC [1] inputs and the output of the PLC activates the output relay and thus lights, fans, solenoid valve and buzzer are controlled and worked effectively.

Keywords: PLC (Programmable Logic Controller), Sensors, Relay, HMI (Human Machine Interface) ________________________________________________________________________________________________________ I.

INTRODUCTION

Home automation is the residential extension of building automation. It is automation of the home, housework or household activity. Home automation may include centralized control of lighting, Fan, overhead water level control, hand wash system, theft alarm, gas leakage detection to provide improved convenience, comfort, energy efficiency and security[2]. Home automation for the elderly and disabled can provide increased quality of life for persons who might otherwise require caregivers or institutional care. The main objective of this project is to make a smart home with the help of sensors and lower energy consumption devices.

To access the control of home appliances through One Touch Screen (OTS) and make the work simpler using PLC integrated with HMI. To make homes, safe & secure and automation through various modes of operation. To prioritize the controls as fully and semi-automated on need based.

II. PROPOSED SYSTEM  Gas control  Water supply control  Overhead tank water level control  Human sensed lightings and fan  LED shadings  Theft Alarm  USB charging These are the controls being implemented in this project. This are being implemented via HMI integrated PLC. The advantage behind our proposed system will be,  Safety and Security.  Ease access for controlling the home through OTS (one-touch screen).  No mechanical switches for appliance control.  Automation through various modes of operating states via OTS control.

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III. LAYOUT OF PROPOSED SYSTEM

Fig. 1: Layout of Proposed System

In Figure 1, the layout of the proposed system is illustrated. For implementation of home automation effectively, here programmable logic controller is interfaced with HMI. Here the heart of the project is HMI which is used for control of home systems. The input voltage given to the PLC is 24V. Here MQ-2 sensor is used to detect the leakage of gases in gas pipe line valve.

LM-335 is used as temperature sensors which sense the temperature of room and thus it controls the automatic on and off of fan based on the room temperature. PIR sensor is a motion sensor which helps to detect the infrared light and here it is used in light system control. IR sensor is also a motion sensor which helps for the detection of human and used for hand wash system. Float switch which is used for detection of water level and automatic overhead tank and also avoids the overflow of water.

IV. COMPONENTS DESCRIPTION

1 2 3 4 5

Name of the block PIR IR MQ2 FLOAT SWITCH PLC

Device rating 5V 5V 5V 24V 24V

Table - 1 Output rating of the devices 3.33V 3.33V 4.2V 24V 24V

Detecting Parameter IR RADIATION MOTION DETECTION LPG WATER DIGITAL I/O

These are the components being implemented in this project and their rating and usage. The sensor used are described as follows, Passive Infrared Sensor

Fig. 2: operation of PIR sensor

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This sensor is being used for automatic on and off control of light and fan. These sensors will sense the human IR radiation and send this sensed signal to PLC for the automatic operation of the appliances.

IR Sensor This sensor is being used for sensing the object in hand wash system. Here when human cross the pipe the signal will be transmitted by transmitter and the signal interrupted and returns to receiver as shown in figure3.

Fig. 4: operation of Mq-2 Gas Sensor

These sensor is used to detect the gas leakage in gas pipeline of the system which operates as per the circuit shown in figure 4.

MQ-2 Gas Detecting Sensor

Fig. 4: operation of Mq-2 Gas Sensor

These sensor is used to detect the gas leakage in gas pipeline of the system which operates as per the circuit shown in figure 4.

V. SOFTWARE DESCRIPTION CODESYS is a software platform especially designed to fulfil the different requirements of modern automation. Most of the automation task is fully integrated in CODESYS such as development system, field bus, I/O configuration, visualization, motion control etc. Adapt to meet the requirements of system using plug-ins, customized libraries and extension libraries. It is embedded virtually to every system structure with interfaces to standards like automation techniques such as FDT. This software is used to develop a program to control the home appliances in this project.

Programming Language Features: All five programming languages for application programming defined in the IEC 61131-3 are available in the CODESYS development environment.  IL (Instruction list) is an assembler like programming language  ST (Structured text) is similar to programming in PASCAL or C  LD (Ladder diagram) enables the programmer to virtually combine relay contacts and coils  FBD (Function block diagram) enables the user to rapidly program both Boolean and analogue expressions  SFC (Sequential function chart) is convenient for programming sequential processes and flows Additional Graphical Editor Available In CODESYS Not Defined In The IEC Standard: 

CFC (Continuous Function Chart) is a sort of freehand FBD editor. Other than in the network-oriented FBD editor where the connections between inputs, operators and outputs are set automatically they have to be drawn by the programmer. All boxes can be placed freely which makes it possible to program feedback loops without interim variables. Integrated compilers transform the application code created by CODESYS into native machine code (binary code) which is then downloaded onto the controller. Once CODESYS is online, it offers an extensive debugging functionality such as variable monitoring/writing/forcing by setting breakpoints/performing single steps or recording variable values online on the controller in a ring buffer.

CODESYS V3.x is based on the so-called CODESYS Automation Platform; an automation framework device manufacturer can extend by their own plug-in modules. The CODESYS Professional Developer Edition offers the option to add components to the tool which are subject to licensing, e.g. integrated UML support, a connection to the Apache Subversion version control system,

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online runtime performance analysis, static code analysis of the application code or script based automated test execution. The free of charge CODESYS Application Composer lets users create complete automation applications with the IEC 61131-3 tool.

Machines or plants can be configured based on modules, e.g. defining the mechatronics construction or the used software functionality including the whole functionality of the project. An integrated configuration generates visible IEC 61131-3 code out of this configuration.

VI. LADDER DIAGRAM OF THE PROJECT

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Virtually Controlled Semi -Automated Smart Home (IJSTE/ Volume 2 / Issue 10 / 144)

    

In PLC ladder logic programming, new screen is displayed with the help of Main switch (f4), at that instant other keypad will not get enabled [3].

When the supply is given to the normal switch, the o/p coil get latched and thus the o/p bit gets counted, which is said to be as normal mode operation.

When the supply is given to the emergency switch, the o/p coil gets latched and thus the emergency command is displayed in HMI. Whenever the normal switch is closed, LDR, PIR and LSWITCH gets closed and light gets on. While customized switch is operated the LSWITCH gets closed, which is operated manually.

When Normal switch is closed, PIR and FSWITCH get latched and fan turns ON. In over head tank F up/F down sensors are used. If the level of the water goes down the FDOWN switch gets latched and motor gets on. If the level of water reaches to the F UP switch, motor turns off .

VII. RESULT AND IMPLEMENTATION

In this project, the process of home automation is effectively controlled with the help of human machine interface on programmable logic controller. It reduces the time consumption, cost and manual operation and hence it is user-friendly. The overall functioning of this system is controlled using HMI with normal and emergency mode and also can operate at customized mode. Thus this system can be effectively implemented to all modern homes.

Fig. 5: Experimental Set Up of This Project

VIII. FUTURE SCOPE In future, this project can also be extended to have various other controls effectively in home. The future extends such as automatic window curtains opening, garden watering, garage door opening, security alarm etc.

REFERENCES [1] [2] [3]

Albert Falcons and Bruce Krogh, “Design recovery for relay ladder logic”, pg (648 – 653), Vol.2, 13-16 Sep 1992.

L.A. Bryan, E.A. Bryan, “Programmable controllers: theory and implementation” 1: 5, 1997.

D. H. Stefano and Z. Bien, “The Smart House for Older Persons and Persons With Physical Disabilities”, IEEE Transactions On Neural Systems And Rehabilitation Engineering, pg( 228-250), Vol.12, June 2004.

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