Brain controlled artificial robotic legs
- 3. Brain computer interface. It is a direct communication path way between a human brain or animal brain and external device.
- 4. BRAIN WAVES There are four categories Beta waves Alpha waves Theta waves Delta waves
- 5. BETA WAVES:- • Low amplitude •Faster of all waves •15-40c/s ALPHA WAVES:- •High amplitude •Non-arousal •9-14c/s
- 6. THETA WAVES:- •Greater amplitude •Day dream •5-8c/s DELTA WAVES:- •Greater amplitude •1.5-4c/s •Never become zero
- 9. • It contains electrodes which are placed on the skull in an arrangement called 10-20 system. • Main function of the electrode cap is to take the brain signals in the form of electrical signals
- 10. Output signal from the electrode cap will be in the range of milli volt & microvolt Hence there is a need for amplification Pair of electrodes-one amplifier
- 11. Output signals are analog in nature So the signals are sent to ADC to convert the analog signals to the digital signals
- 12. Using the ouput signal from the a/d conv. Parameter extraction, pattern classification & pattern identification are done. Then the signal is fed to FFT unit for simplifying the calculations
- 13. It performs the robotic operations with the help of stepper motor It will control the operations like walking, running etc.
- 14. •Waves are pre recorded for operation •Signals are stored in micro controller •If brain wave matches with the pre recorded signals then operation is performed
- 15. •Idea can be extended for both the legs •System is versatile •Feasible in real time environment
- 16. • It uses Li-ion battery • It require to charge once in 2days • The life time will be longer when compared to other batteries
- 17. Brain Controlled Artificial Legs Normal Artificial Legs 1. Ease of Construction 1. Complex in construction 2.Cost is not more than Rs.5,00,000 2. Cost is about $80,000- $90,000(Rs.35,00,000 to Rs.40,00,000) 3.User can have full control over the artificial leg. 3. User cannot have full control over the artificial leg. 4.Semi-Automatic 4. Fully Automatic 5.Sensors are absent. 5.Sensors are present 6.Requires simple control unit. 6. Requires complex control unit.
- 18. • The performance of the proposed system will be better than the existing artificial legs • With the system life can be made easier for the differently abled persons