Electromagnetic Suspension System for Control of Limb Volume in Prosthetics

Residual limb shrinkage is a major concern for prosthetic users with below the knee amputations. The remaining limb shrinks as the fluid is squeezed out by forces to the remaining limb throughout the day. The system proposed uses electromagnets for regional control and help with suspension of the limb. The system consists of pressure sensors, microcontroller, and additional circuits to amplify the sensor outputs and control the amount of power to the magnets. Experimental results showed that the control system works properly and that the magnets are adequate for suspension system of the prosthetic limb.