Browsing by Author "Bayindir, Nuri Suha"

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    Preventing Anterior Translation of the Human Knee Joint by Contracting the Biceps Femoris Muscle Using an Accelerometer and an Electrical Muscle Stimulator Device
    (IEEE, 2019-10) Oztekin, Haluk Hayri; Bayındır, Süha; Güner, Aytuğ; Bayindir, Nuri Suha
    This paper presents the design, implementation and the test results of a Prophylactic Anti-Translational Electronic Knee Brace which detects the abnormal anterior translation of the tibial bone in the knee joint caused by an anterior cruciate ligament rupture. With the help of a three axes wireless acceleration sensor, the agonist biceps femoris muscle is contracted in real time, using a microcontroller based electrical muscle stimulator (EMS), at the instant when the acceleration of the tibia exceeds a limit value. The waveforms of the modulus of the three axes acceleration components and the EMS pulses applied to the right and left knees of a healthy subject, during the extension and flexion tests on the knee joint are presented simultaneously and discussed. It was observed that, the EMS pulses are generated with a delay of 40 msec and contracted the biceps femoris muscle successfully, at the instant when the acceleration limit is exceeded.