08-08-2012, 12:35 PM
VOICE RECOGNITION BASED WIRELESS HOME AUTOMATION SYSTEM
VOICE_RECOGNITION_BASED_WIRELESS_HOME_AUTOMATION_SYSTEM_1_.docx (Size: 30.47 KB / Downloads: 282)
ABSTRACT:
Home Automation industry is growing rapidly; this is fuelled by the need to provide supporting systems for the elderly and the disabled, especially those who live alone. Coupled with this, the world population is confirmed to be getting older. Home automation systems must comply with the household standards and convenience of usage. This project details the overall design of a wireless home automation system (WHAS) which has been built and implemented. The automation centers on recognition of voice commands and uses low-power RF ZigBee wireless communication modules which are relatively cheap. The home automation system is intended to control all lights and electrical appliances in a home or office using voice commands. The system consist of voice recognition kit, indoor ZigBee communication kit, and the compression and decompression kit of DPCM (Differential Pulse Code Modulation) speech signals.
INTRODUCTION:
The demography of the world population shows a trend that the elderly population worldwide is increasing rapidly as a result of the increase of the average live expectancy of people. Caring for and supporting this growing population is a concern for governments and nations around the globe. Home automation is one of the major growing industries that can change the way people live. Some of these home automation systems target those seeking luxury and sophisticated home automation platforms; others target those with special needs like the elderly and the disabled. The aim of the reported Wireless Home Automation System (WHAS) is to provide those with special needs with a system that can respond to voice commands and control the on/off status of electrical devices, such as lamps, fans, television etc, in the
home.
The system should be reasonably cheap, easy to configure, and easy to run. smart homes and voice recognition systems. an integrated platform for home security, monitoring and automation (SMA) from uControl. The system connected through LCD screen that can wirelessly be connected to security alarms and other home appliances. The home automation through this system requires holding and interacting with a large panel which constraints the physical movements of the user. Another popular commercially available system for home automation is from Home Automated Living (HAL). HAL software taps the power of an existing PC to control the home. It provides speech command interface.
A big advantage of this system is it can send commands all over the house using the existing highway of electrical wires inside the home’s walls. No new wires means HAL is easy and inexpensive to install. However, most of these products sold in the market are heavily priced and often require significant home make over.
SCOPE OF THE PROJECT
The impact of home automation on domestic lifestyles will be as far ranging as was that of factory automation on industry and its benefits will be available to all sectors of society. Home automation can be achieved not only with the household robot but with embedded computing power and memory within dozens of pieces of domestic equipment, each of which can communicate with the user and with other equipments. Within the integrated home system the communication media will include infra-red, radio, mains wires, installed twisted wires and coaxial cable, and later perhaps optical fibre. Applications will include security, lighting, heating, cooking, washing appliances, audio and video systems, energy management as well as a number of new applications such as health monitoring, home publishing and entertainment. For example, when the heating system is linked to home automation, home always keeps the room temperature at the level set by the owner and money is saved on top of that. That way humans not only always have a healthy climate at home, but also economize on costs; saving up to %30 a year just from a heating system with individual room control and window monitoring. Consumption management is good for even more, though, such as automatically switching high-consumption devices on like the washing machine during those times of the day when rates are the lowest. Remote controlling or monitoring can be achieved with that system. So life may be more comfortable and more secure.
THEME OF THE PROJECT:
The Wireless Home Automation System (WHAS) is an integrated system to facilitate elderly and disabled people with an easy-to-use home automation system that can be fully operated based on speech commands. The system is constructed in a way that is easy to install, configure, run, and maintain. The functional blocks of the overall system are shown in Figure. Figure shows: Sequence of activities in the Wireless Home Automation System The system consists of three modules:
• Handheld Microphone Module which incorporates a microphone with RF module (ZigBee protocol).
• Micro Controller Module
• Appliance Control Modules.
The voice is captured using a microphone, sampled, filtered and converted to digital data using an analogue-to-digital converter. The data is then compressed and sent serially as packets of binary data to the microcontroller Module, then it is sent through zigbee. Upon recognition of the commands, control characters are sent wirelessly to the specified appliance address. Consequently, appliances can be turned ON or OFF depending on the control characters received.
LITERATURE SURVEY:
1) Speech Recognition System for Massey SmartHouse
R. Gadalla, “Voice Recognition System for Massey University
Smarthouse,”
The concept of SmartHouse aims to integrate technology into houses to a level where most daily tasks are automated and to provide comfort, safety and entertainment to the house residents. The concept is mainly aimed at our elderly population to improve their quality of life. In order to maintain a natural medium of communication, the house employs a speech recognition system capable of analyzing spoken language, and extracting commands from it. The project will incorporate speech recognition technology within an application developed with a high level programming language, and using a commercial speech recognition engine. The speech recognition system will act as a hub within the SmartHouse to receive and delegate user commands to different switching and control systems. Initial trails were built using Dragon Naturally Speaking as the recognition engine. However, that proved inappropriate for use in the SmartHouse project as it is speaker dependent and requires each user to train it with his/her own voice. The application now utilizes the Microsoft Speech Application Programming Interface (SAPI), a software layer which sits between applications and speech engines and The Microsoft Speech Recognition Engine (MS SRE), which is free to use.