Futuristic Bionic Leg For Amputees

Abstract

Amputees with lower-limb loss need special care during daily life activities to make their life back to a natural life as it was before amputation. Traumatic injuries, accidents, and different diseases like diabetes and tumors have been found as common causes of such amputation. To overcome such amputation prosthetic artifcial limbs were made for hundreds of years. Recently developed robotics have demonstrated and has shown a light of hope to such people. With the advancement in technology, it is now possible to design a prosthesis that makes it easier for such unilateral transtibial amputees to walk normally. The bionic leg development starts from the mechanical limb to the latest available Electromyography (EMG) based bionic leg. Due to expensiveness and unavailability previously designed bionic legs are not affordable to the meager people. Our designed project is inexpensive and easily accessible. Five characteristics should keep in mind while designing a leg as follows. Strength, stiffness, durability, density, and corrosion resistance. At frst, The design is based on 3-segments which include a socket, pylon, and foot, and 2-joints having knee and ankle joints. Secondly, Stand-to-sit and Sit-to-stand movements will be performed by the leg. The brain gives the active signal to the thigh muscle via nerves. EMG muscle sensors connected with Arduino-UNO will get those active signals of the brain from the thigh and after classifcation of the signal passive torque will be generated by them. After that, the passive torque will be given as the task to servo motors for respective ankle and knee joints movement. A closed-loop system is designed by actuating the position of servo motors for performing specifc movements of the leg. The fnal result is the design of a complete model which has abilities to be used as an artifcial leg. This will empower and can give hope to people with disabilities to live a quality life in society.