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AIM:

AIM:. To control the movement of a manual wheelchair by means of human voice for paralyzed patients. DRIVER CIRCUIT. RIGHT MOTOR. MIC. RESET. BATTERY CHARGER. VOICE RECOGNITION IC. MICROCONTROLLER. BATTERY. SPEED &DIRECTION CONTROl. DRIVER CIRCUIT.

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AIM:

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  1. AIM: • To control the movement of a manual wheelchair by means of human voice for paralyzed patients.

  2. DRIVER CIRCUIT RIGHT MOTOR MIC RESET BATTERY CHARGER VOICE RECOGNITION IC MICROCONTROLLER BATTERY SPEED &DIRECTION CONTROl DRIVER CIRCUIT LEFT MOTOR BLOCK DIAGRAM

  3. SPECIFICATIONS 1.MICROCONTROLLER: ATMEL 89C51 2.VOICE RECOGNITION IC : ISD 2500 3. MOTOR DRIVER CIRCUIT 4.MOTORS(DC):HUB MOTOR 5.BATTERY

  4. VOICE RECOGNITION IC • ACCEPTS THE VOICE INPUT SIGNAL • SPEED AND DIRECTION RECORDED MICRO CONTROLLER • PROCESSES DATA • PROVIDES CONTROL VOLTAGE TO MOTORS • DC MOTORS • DRIVES THE WHEELS OF THE CHAIR IN • NECESSARY MODES

  5. VOICE RECOGNITION IC • It’s a single chip CMOS voice recognition module • 5 -10 isolated word voice can be recognized • It compares the input voice signal with the previously recorded signal • Insensitive to environmental sounds. • Its output serves as a input to microcontroller.

  6. MICRO CONTROLLER:ATMEL 89C51 • 8 Bit CPU optimized for control applications • On - Chip Flash Program Memory • On - Chip Data RAM • Bi-directional and Individually Addressable I/O Lines • Multiple 16-Bit Timer/Counters • Full Duplex UART • On - Chip EEPROM

  7. MOTOR DRIVER • Control the motor in the forward ,reverse, left & right direction. • It consists of four relays. • The relay ON and OFF is controlled by the two pairs of switching transistors.

  8. MOTOR • Electric dc motor is used . • It works on the principle of electromagnetism. BATTERY • 12volt battery • Long life and chargeable

  9. ADVANTAGES • Compact • user friendly • less complex. • Low cost • Easy to implement • Accuracy • Economical • Reduce manpower

  10. CONCLUSION • Due to the probability of high technology (Atmel microcontroller) used this “Voice operated vehicle” system is fully software controlled with less hardware circuit. The feature makes this system is the base for future systems.

  11. FUTURE IDEAS: • Powered wheelchair with a speech based interface and biosignal monitoring instrumentation. • The user can use the voice, a natural communication method, for controlling the chair movement and obtain information about his health.

  12. BE AN ENGINEER SAVE THE WORLD……

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