- Open Access
- Total Downloads : 8
- Authors : Harshal Shinde, Vaibhav Salunkhe, Madan Sawant, Vinay Sawant
- Paper ID : IJERTCONV3IS06055
- Volume & Issue : ICONECT – 2015 (Volume 3 – Issue 06)
- Published (First Online): 24-04-2018
- ISSN (Online) : 2278-0181
- Publisher Name : IJERT
- License: This work is licensed under a Creative Commons Attribution 4.0 International License
Voice Operated System to Control Devices Remotely
Harshal Shinde, Vaibhav Salunkhe, Madan Sawant, Vinay Sawant
Department of Electronics and Telecommunication Engineering
K.C. College of Engineering & Management Studies & Research Thane, India
Abstract The voice operated device control system is an integrated system to facilitate elderly and disabled people and industry people with an easy-to-use device automation system that can be fully operated based on speech commands. The system is modular i.e. constructed in a way that is easy to install, configure, run, and maintain. This paper introduces voice operated system which is developed using microcontroller with the ZigBee wireless communication technology and speech recognition technique. The automation centers on recognition of voice commands using HM2007 and uses low-power RF ZigBee wireless communication modules which are relatively cheap. This system is used to control all lights and electrical appliances in a home or office using voice commands with help of HM2007 chip that is widely used for such appliances. The proposed system gives the overall framework of hardware and software design, and describes ways to implement the system.
Keywords Microcontroller; automation; ZigBee; voice command; HM2007; voice recognition
The development of the new technologies in the field of electronics has brought tremendous changes in the day to day life of every human being. They have entered the fields like industry, medicine, telecommunication and also home automation . Most of the system makes use of a web server and mobile communication for controlling the appliances . A typical wireless device automation system allows one to control appliances from a centralized control unit which is wireless. These appliances usually have to be specially designed to be compatible with each other and with the control unit for most commercially available automation systems . The project demonstrates a system that allows one to wirelessly control lights, fans, air conditioners, television sets, security cameras, electronic doors, computer systems, audio/visual equipments, industrial machines, industrial equipments etc. and turn on or off any appliance that is plugged into a wall outlet.
Table 1. Comparision table of existing automation techniques
Electromec hanical relay interface
Secured door system
Low cost and low complexity
Digital door lock system
24 bit tag
and 8 bit user ID tag
Secure access of home
Information in tag is protected
Low cost antenna system, RFID
Reduced cost enhanced reliability
Beekit, code warriorID E
Light switching, temperature control
Easy network creation and modification
Smart digital door lock system
Wi-Fi process or ZigBee process or
Wi-Fi and ZigBee network
Light switch, radiator valve
Increase connectivity of devices, remote access
Bluetooth module,RS 232
Controlling light, fan and
Bluetooth eliminates usage charges
Cheap, easy to install and easy to run
In this section we present the hardware descriptions in the two units:
Microphone with voice recognition unit:
The human voice is captured through microphone. It is matched with the voice previously recorded in HM2007. If it matches the corresponding signals are sending
through Zigbee. Here HM 2007 is the voice recognition unit .
On this system voice is recorded and saved and then recognized whenever a command is given through microphone .
The speech recognition system is a completely assembled and easy to use programmable speech recognition circuit. Programmable, in the sense that you train the words (or vocal utterances) you want the circuit to recognize. This board allows you to experiment with many facets of speech recognition technology . It has 8 bit data out which can be interfaced with any microcontroller for further development. Some of interfacing applications which can be made are controlling home/industrial appliances, robotics movements, Speech Assisted technologies and many more .
Self-contained stand alone speech recognition circuit.
Up to 20 word vocabulary of duration 1.92 seconds each.
Non-volatile memory back up that will keep the speech recognition data in memory even after power off.
Easily interfaced to control external circuits & appliances.
Appliance control unit:
Once the speech commands are recognized, control charterers are sent to the specified appliance address through ZigBee communication protocol . Each appliance that has to be controlled has a relay controlling circuit. The control characters corresponding to the recognized commands are then sent serially from the central controller module to the appliance control modules that are connected to the appliances .
Main functional blocks
Speech recognition unit:
The heart of speech recognition system is HM2007
Figure 1. Flow chart of entire system
voice recognition IC. The IC can recognize 20 words, each word a length of 1.92 seconds . The test related to speech recognition unit was conducted in one of the reference paper. The tests involved 5 subjects; the trials were conducted with people with different Indian languages. The test subjects were a mix of male and female and 7 different voice commands were sent by each person. Thus the test involved sending a total of 5 commands. 80.05% of these commands were recognized correctly. The tests results of voice command recognition are mentioned below:
Figure 2. Percentage of commands correctly recognized
It is a low-cost, low-power, wireless networking standard (IEEE 802.15.4). The low cost allows the technology to be widely deployed in wireless control and monitoring applications, the low power-usage allows longer life with smaller batteries, and different networking topologies provides high reliability and larger range.
Figure 3. ZigBee communication module
Figure 3. ZigBee communication module
Figure 4. Microcontroller AT89S51
Any 8-bit microcontroller can be configured ith the system. Here we have used 8051 microcontroller (AT89S51)-full static CMOS controller, 8k Flash memory, 256 bytes RAM, 4 I/O ports of 8 bit wide, 3 timers/counters, 8 interrupt sources.
Liquid crystal display:
16×2 LCD that is 16 characters per row. The LCD
Figure 5. 16X2 LCD
display is used in both base and remote sections. These LCD displays are used to show status of the voice commands.
Power supply unit:
The power supply of different voltages is required for different unit blocks in this system. 9V/12V is required for the relay driver circuit and 5V is necessary for all other circuits.
Relay driver board:
The relay driver board contains 8 relays. This board is used to change the state of a relay.
Figure 6. Relay driver circuit
Figure 7. Transmitter section
The main program for this system is written in the embedded C programming language. The schematic diagram for this system which consists of all the components was designed by using the Proteus ISIS 7 professional editions. The main program was developed in the Keil Integrated Development Environment by using the embedded C programming language. The printed circuit boards are developed by using EAGLE 6.2 Professional software.
Figure 8. Receiver section
This project has described the design and implementation of voice operated system to control devices remotely. It has a function of controlling the devices which are located at remote place. It is difficult to control the devices with a voice command, but this can be easily achieved in this system.
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