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30120140504029

  1. 1. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online), Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME 243 ANALYSIS OF VOICE CONTROLLED VEHICLE CHAIR WITH DROWSY DETECTION G. Vijay Prakash Assistant Professor, Department of Mechanical Engineering, Vandayar Engineering College, Nagai Main Road, Thanjavur - 613 501, Tamilnadu, India ABSTRACT Voice Controlled Chair is which can be controlled by the user by giving specific voice commands. The speech recognition software (SDK-Speech Development Kit) running on a PC or SDK is capable of identifying the voice commands through Mic issued by a particular user. After processing the speech, the necessary motion instructions are given to the mobile chair by using pneumatic pump, compressor and solenoid valve. The speech recognition software is speaker dependant. The special feature of the application is the ability of the software to train itself for the above voice commands for a particular user. Here the actuator is used to make desired movements of the chair. It contains mainly an Electric Motor, Sliding Tube, Solenoid .Also here we are using multiple sensors to sense such as temperature and drowsiness (Eye-Blink Sensor) and chair responds automatically according to drowsiness and high temperature. LCD is used to display the status of the unit. The mechanical set up such as actuator and electric motor controlled by Microcontroller is used to control the postures of chair. KeyWord: SDK (Speech Development Kit), Actuator, Eye Blink Sensor, LCD (Liquid Crystal Display), Microcontroller, Mic(Microphone) INTRODUCTION Ergonomics (or human factors) is the scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data and methods to design in order to optimize human well-being and overall system performance. Ergonomics is about designing for people, wherever they interact with products, systems or processes. We usually don’t notice good design (unless perhaps, it’s exceptional) because it gives us no cause to, but we do notice poor design. The emphasis within ergonomics is to ensure that designs INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET) ISSN 0976 – 6340 (Print) ISSN 0976 – 6359 (Online) Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME: www.iaeme.com/ijmet.asp Journal Impact Factor (2014): 7.5377 (Calculated by GISI) www.jifactor.com IJMET © I A E M E
  2. 2. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online), Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME 244 complement the strengths and abilities of people and minimize the effects of their limitations, rather than forcing them to adapt. In achieving this aim, it becomes necessary to understand and design for the variability represented in the population, spanning such attributes as age, size, strength, cognitive ability, prior experience, cultural expectations and goals. Qualified ergonomists are the only recognized professionals to have competency in optimizing safety performance and comfort. When user’s works or drives a vehicle long time sitting on chair to make user feel comfortable and do work more easier user have to change the posture of chair according to his complacency. When user continuously changes the posture of chair using his hand he would feel uncomfortable and tiredness in his muscles. To avoid this we built voice controlled chair which is controlled by just voice commands (ex:up,down,left,right).Speech Development Kit(SDK) software is used to recognize the voice and convert it to serial commands to the microcontroller and micro controller operates pneumatic pump corresponding to predefined program. Sensors such as temperature and eye blink is used to analyze the status of user human factors such as body temperature and drowsiness .This chair can be used in vehicles and also working places. Many people drive while they are drowsy. Some are able to recognize that there is a problem, but most are unaware that their driving is being affected. Sleepy drivers start yawning, their eyes go out of focus and they cannot remember driving the last few kilometers. A survey in the US found that as many as 6 in 10 drivers drive while they are drowsy. The problem is that people are very bad at knowing whether it is affecting their driving and whether they are too drowsy to drive. Falling asleep happens quickly and without much warning. Table 1: Fatal Crashes, Drivers, and Fatalities in Crashes Involving Drowsy Driving, by Year, 2005-2009 Overall Fatal Crashes Fatal Crashes Involving Drowsy Driving Year Crashes Drivers Fatalities Crashes Drivers Fatalities 2005 39,252 59,220 43,510 1,033 (2.6%) 1,034 (1.7%) 1,194 (2.7%) 2006 38,648 57,846 42,708 995 (2.6%) 995 (1.7%) 1,091 (2.6%) 2007 37,435 56,019 41,259 926 (2.5%) 926 (1.7%) 1,050 (2.5%) 2008 34,172 50,416 37,423 746 (2.2%) 747 (1.5%) 854 (2.3%) 2009 30,797 45,230 33,808 730 (2.4%) 730 (1.6%) 832 (2.5%) 2005-2009 180,304 268,731 198,708 4,430 4,432 5,021 5-Year Average 36,061 53,746 39,742 886 (2.5%) 886 (1.6%) 1,004 (2.5%)
  3. 3. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 ISSN 0976 – 6359(Online), Volume 5, Issue MECHANISM BLOCK DIAGRAM The lift chair has a chair base. A chair frame is pivotally attached to the chair base for pivotal movement about a horizontal frame axis. The frame axis is positioned adjacent to a lower forward portion of the chair frame. A seat pad and backres actuator is connected to the chair base and to the chair frame for pivoting the chair frame about the horizontal frame axis between a seat pad lowered position and a seat pad raised position. Left and right hinge and ratchet assemblies have anchor arms fixed to the chair frame. Adjustable arms are pivotally attached to the anchor arms by hinge pins for pivotal movement about an arm rest axis. Each hinge and ratchet assembly includes a pivot teeth to hold an adjacent arm in a selected position and to limit pivotal movement of an adjustable arm to a lower position. Bolt lockouts inactivate the bolts to permit pivotal movement of the adjustable arms to a lowered position. A left arm rest is attached to one of the adjustable arms with its rear end adjacent to the arm rest axis. A right arm rest is attached to the other adjustable arm with its rear end adjacent to the other adjustable arm. The ratchet assemblies permit the arm rests to be pivoted to positions in which they are horizontal when the seat cushion is in a raised position. The arm rests can be used to provide assistance in moving to a standing position when the arm rests are in a raised horizontal posit Fig Fig-2: Power Supply Relay Unit International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 6359(Online), Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME 245 MECHANISM BLOCK DIAGRAM The lift chair has a chair base. A chair frame is pivotally attached to the chair base for pivotal movement about a horizontal frame axis. The frame axis is positioned adjacent to a lower forward portion of the chair frame. A seat pad and backrest pad are connected to the chair frame. A linear actuator is connected to the chair base and to the chair frame for pivoting the chair frame about the horizontal frame axis between a seat pad lowered position and a seat pad raised position. Left and hinge and ratchet assemblies have anchor arms fixed to the chair frame. Adjustable arms are pivotally attached to the anchor arms by hinge pins for pivotal movement about an arm rest axis. Each hinge and ratchet assembly includes a pivoted bolt that is engageable with a plurality of ratchet teeth to hold an adjacent arm in a selected position and to limit pivotal movement of an adjustable arm to a lower position. Bolt lockouts inactivate the bolts to permit pivotal movement of the ed position. A left arm rest is attached to one of the adjustable arms with its rear end adjacent to the arm rest axis. A right arm rest is attached to the other adjustable arm with its rear end adjacent to the other adjustable arm. permit the arm rests to be pivoted to positions in which they are horizontal when the seat cushion is in a raised position. The arm rests can be used to provide assistance in moving to a standing position when the arm rests are in a raised horizontal posit Fig-1: Block Diagram of Seat Block Diagram of Seat mechanism Seat Position Seat Frame Actuators / Motors International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), The lift chair has a chair base. A chair frame is pivotally attached to the chair base for pivotal movement about a horizontal frame axis. The frame axis is positioned adjacent to a lower forward t pad are connected to the chair frame. A linear actuator is connected to the chair base and to the chair frame for pivoting the chair frame about the horizontal frame axis between a seat pad lowered position and a seat pad raised position. Left and hinge and ratchet assemblies have anchor arms fixed to the chair frame. Adjustable arms are pivotally attached to the anchor arms by hinge pins for pivotal movement about an arm rest axis. ble with a plurality of ratchet teeth to hold an adjacent arm in a selected position and to limit pivotal movement of an adjustable arm to a lower position. Bolt lockouts inactivate the bolts to permit pivotal movement of the ed position. A left arm rest is attached to one of the adjustable arms with its rear end adjacent to the arm rest axis. A right arm rest is attached to the other adjustable arm with permit the arm rests to be pivoted to positions in which they are horizontal when the seat cushion is in a raised position. The arm rests can be used to provide assistance in moving to a standing position when the arm rests are in a raised horizontal position.
  4. 4. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 ISSN 0976 – 6359(Online), Volume 5, Issue F CONTROL SECTION In control unit microcontroller gets input from voice input and eye blink and temperature sensors .Microcontroller is programmed to control the actuator by controlling the power supply of the electric motor of the actuator. The microcontroller is programmed to contro according to the commands such as up and down commands. The eye blink sensor is used to detect the drowsiness of the user and gives input to the microcontroller and microcontroller makes jerk movement to wake up the user while driving .Temp human body in order to alert user if temperature is too high. The IR sensor is used to trigger the timer as the driver sit on the seat. If the driver drives the vehicle for 3 hours more, it sets off the al alerts the user to take rest and get relaxed. unit is used to provide the required power to whole unit. Alarm unit is activated when user got sleep or temperature is high. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 6359(Online), Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME 246 Fig-3: Diagram of Power Seat Motor unit microcontroller gets input from voice input and eye blink and temperature sensors .Microcontroller is programmed to control the actuator by controlling the power supply of the electric motor of the actuator. The microcontroller is programmed to contro according to the commands such as up and down commands. The eye blink sensor is used to detect the drowsiness of the user and gives input to the microcontroller and microcontroller makes jerk movement to wake up the user while driving .Temperature sensor is used to sense the temperature of human body in order to alert user if temperature is too high. The IR sensor is used to trigger the timer as the driver sit on the seat. If the driver drives the vehicle for 3 hours more, it sets off the al alerts the user to take rest and get relaxed. LCD is used to display the status of the unit. Power supply unit is used to provide the required power to whole unit. Alarm unit is activated when user got sleep International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), unit microcontroller gets input from voice input and eye blink and temperature sensors .Microcontroller is programmed to control the actuator by controlling the power supply of the electric motor of the actuator. The microcontroller is programmed to control the movements according to the commands such as up and down commands. The eye blink sensor is used to detect the drowsiness of the user and gives input to the microcontroller and microcontroller makes jerk erature sensor is used to sense the temperature of human body in order to alert user if temperature is too high. The IR sensor is used to trigger the timer as the driver sit on the seat. If the driver drives the vehicle for 3 hours more, it sets off the alarm and LCD is used to display the status of the unit. Power supply unit is used to provide the required power to whole unit. Alarm unit is activated when user got sleep
  5. 5. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online), Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME 247 Fig-4: Eye Blink Sensor Fig-5: Control Block Diagram MICRO CONTROLLER Relay with Driver Circuit Actuator / Seat Adjusting Mechanism LCD POWER SUPPLY Driver Seat Eye Blink Sensor Temperature Sensor Alarm PC (or) Speech Recognition Kit Mic IR Sensor (Receiver) IR Sensor (Transmitter)
  6. 6. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online), Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME 248 CONCLUSION This Voice controlled chair is very useful for long drive users. We can use this voice control chair some other working places .This voice controlled movement control methodology can be used not only in chair but also some other machines. The communication between mechanical design and control system using Microcontroller makes movements of chair is more easier. The voice commands are programmed in microcontroller to control the movements of chair. By controlling the power supply to the actuator the movements of the chair is controlled. Multi sensors are used to detect drowsiness and body temperature and IR sensor to trigger the timer and periodically alerts driver to take rest. REFERENCES [1] A Gavriel Salvendy (2012), Article in an edited book, in book title (Human factors and Ergonomics) fourth edition. [2] Weinstein, C. J. “Opportunities for Advanced Speech Processing in Military Computer-Based Systems.” Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA.I991. [3] Prabhdeep Singh Sandhu. “Automatic Seat Adjustment” Department of Mechanical Engineering, PITAM Thiruvallur, Chennai, (2013) [4] A Muhammad Ali Mazidi, B Janice G. Mazidi and C Rolin D. Mckinlay (2005), Article in a Book, In Book title 8051 Microcontroller and Embedded systems, The International Edition [5] A Merhyle F. Spotts, B Terry E. Shoup and C Lee E. Hornberger (2004), Article in a book, In Book Title (Design of Machine Elements, 8/E) Prentice Hall [6] A U.A. Bakshi, B M.V. Bakshi (2009), Electrical drives and controls, Technical publications, Pune. [7] Williamson, D., Barry, T., Liggett, K. Flight test results of ITT VRS-1290 in NASA OV-IO. In Proceedings of AVIOS ‘96 Voice I /O Systems Applications Conference. (pp. 335-345). American Voice Input/ Output Society, San Jose, CA. 1996. [8] Eriksson, M and Papanikolopoulos, N.P. “Eye-tracking for Detection of Driver Fatigue”, IEEE Intelligent Transport System Proceedings (1997), pp 314-319. [9] Grace R., et al. “A Drowsy Driver Detection System for Heavy Vehicles”, Digital Avionic Systems Conference, Proceedings, 17th DASC. The AIAA/IEEE/SAE, I36/1- I36/8 (1998) vol.2. [10] Deepthi J and Col Dr T S Surendra, “Various Types of Wheel Chair Control Methods: A Review”, International Journal of Electronics and Communication Engineering & Technology (IJECET), Volume 4, Issue 1, 2013, pp. 250 - 255, ISSN Print: 0976- 6464, ISSN Online: 0976 –6472. [11] Rau, P. Drowsy Driver Detection and Warning System for Commercial Vehicle Drivers: Field Operational Test Design, Analysis, and Progress; National Highway Traffic Safety Administration: Washington, DC, USA, 2005. [12] Drivers Beware Getting Enough Sleep Can Save Your Life This Memorial Day; National Sleep Foundation (NSF): Arlington, VA, USA, 2010. [13] Praveen S. Jambholkar And Prof C.S.P. Rao, “Experimental Validation of a Novel Controller to Increase the Frequency Response of an Aerospace Electro Mechanical Actuator”, International Journal of Mechanical Engineering & Technology (IJMET), Volume 4, Issue 6, 2013, pp. 8 - 18, ISSN Print: 0976 – 6340, ISSN Online: 0976 – 6359.
  7. 7. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online), Volume 5, Issue 4, April (2014), pp. 243-249 © IAEME 249 [14] Husar, P. Eyetracker Warns against Momentary Driver Drowsiness. Available online: http://www.fraunhofer.de/en/press/research-news/2010/10/eye-tracker-driver-drowsiness.html (accessed on 27 July 2012). [15] Gëzim Hoxha and Nijazi Ibrahimi, “Implementation of Graphical - Analytical Method in Determination of Speed of Vehicle in Case of Road Accident and Comparing of Results with The Software Method”, International Journal of Mechanical Engineering & Technology (IJMET), Volume 4, Issue 6, 2013, pp. 69 - 77, ISSN Print: 0976 – 6340, ISSN Online: 0976 – 6359. [16] Forsman, P.M.; Vila, B.J.; Short, R.A.; Mott, C.G.; van Dongen, H.P.A. Efficient driver drowsiness detection at moderate levels of drowsiness. Accid. Anal. Prevent. 2012, in press. [17] Vipul Upadhayay, Prof. Ashish Manoria and Dr. Lokesh Bajpai, “Electrical and Software Based Design of Automated Guided Vehicle using Sensor”, International Journal of Mechanical Engineering & Technology (IJMET), Volume 3, Issue 2, 2012, pp. 150 - 161, ISSN Print: 0976 – 6340, ISSN Online: 0976 – 6359. [18] Liu, C.C.; Hosking, S.G.; Lenné, M.G. Predicting driver drowsiness using vehicle measures: Recent insights and future challenges. J. Saf. Res. 2009, 40, 239–245. [19] Xiao, F.; Bao, C.Y.; Yan, F.S. Yawning detection based on gabor wavelets and LDA. J. Beijing Univ. Technol. 2009, 35, 409–413. [20] Zhang, Z.; Zhang, J. A new real-time eye tracking based on nonlinear unscented Kalman filter for monitoring driver fatigue. J. Contr. Theor. Appl. 2010, 8, 181–188. [21] Yin, B.-C.; Fan, X.; Sun, Y.-F. Multiscale dynamic features based driver fatigue detection. Int. J. Pattern Recogn. Artif. Intell. 2009, 23, 575–589.

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