Control of Servo Motors with Speech Recognition Aided Linear Predictive Coding by Using ZigBee Communication
Abstract
One of the popular wireless communicating technology in electronic society at last years which has IEEE 802.15.4 protocol number is ZigBee communication named by movement of bees is studied in this work. It relates internet of things (IoT) and Industry 4.0. Therefore; these technologies make ZigBee extremely important. A type of ZigBee called XBee modules are used to send commands from the transmitter XBee to the receiver XBee which is connected to the servo motors mounted to wheels on a toy car with the help of Arduino Duemilanove. The transmitter XBee is plugged to the USB dongle that is connected one of the USB ports of the PC. At this stage; XCTU Program is used to get commands from the MatLab Program and send them to the transmitter XBee that sends to the receiver XBee wirelessly. As a second wireless communication tool, speech recognition algorithm is coded into the system by means of MatLab Program. The linear predictive coding (LPC) algorithm on MatLab is one of the good method for speech recognition. One user can control the direction of servo motors with appropriate commands. Finally, the commands are sent to the servo motors which are 15 meter away from the PC through MatLab and XCTU Programs and XBee modules. If the voices of the same person are recorded and embedded in the program, the test is 100% successful. Otherwise, voice recordings are taken from different people, as a result; the success rate is around 80% but the system can be controlled by other users.
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