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MR (Magnetorheologic) cylinders are often preferred to dampen the torques generated, in today's mechanical and electromechanical designs. In this study, a design containing MR cylinder was revisited, an MR current drive circuit was designed and a set of preliminary tests were performed to evaluate the dynamic behavior of the cylinder. After ensemble phase of the MR cylinder, prosthesis frame, and...
In this study, a basic gait motion simulator mechanism combining control units and electromechanic hardware has been proposed and implemented for the test stages of knee prostheses. The main goal to develop such simulator equipment is to regenerate predefined and controllable periodic movement, specifically hip vertical displacement and thigh angle motion applied to above-knee prosthesis so that test...
In this study, performance test results of “various phases state control” of the semi active knee joint with pneumatic damper have been presented in a comparative manner. Performance tests have been conducted with natural human gait and prosthetic gait via image based motion measurement system and sensor based motion measurement system. Subjects are realized gait onto treadmill with different gait...
Traffic Sign Recognition Systems help drivers by classifying the traffic signs with some dedicated hardware. In this study, color segmentation and pattern recognition algorithms are developed for detecting speed bump traffic sign. For detection, standard featured mobile cell phone camera is used and this study is concentrated on especially high noisy situations. It is expected that algorithm is capable...
This study presents the embedded microcontoller of data acquisition unit, performance analysis, and wireless data transfer capability of the semi active above knee joint with pneumatic cylinder developed in Hacettepe University Biomedical Research Laboratory. For this purpose an embedded microcontroller based data acquisition card has been designed and programmed in order to have an adaptive capability...
This study presents the semi active knee prosthesis with pneumatic cylinder performing under Finite State Control. For this purpose, the similarities between walks with the prosthesis and the normal gaits were examined morphologically. The finite state control of the prosthesis with pneumatic cylinder was developed under the basis of number of phases on the gait provided by direct measurement system...
This study presents an above-knee prosthesis test platform for designing and testing knee prosthesis and shares various kinematic analysis results obtained from this system. The main goal for developing such test platform is to generate the periodic move of above knee activity by using basic control units and electro-mechanic units. This platform helps us to assess the design outcomes of the prosthesis...
In this study, a hip simulator mechanism have been presented for designing and testing knee prosthesis. The main reason to design this simulator mechanism is to generate the periodic move of above knee activity by using a basic control unit and electromechanic hardware. This platform will help us to assess the design outcomes of the prosthesis for specifically above knee amputees. The mechanic basis...
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