Yuki Sakaida

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In aging societies, there is a strong demand for robotics to tackle problems caused by the aging population. Patient transfer, such as lifting and moving a bedridden patient from a bed to a wheelchair and back, is one of the most physically challenging tasks in nursing care, the burden of which should be reduced by the introduction of robot technologies. We(More)
In our current research, we are developing a robotic walker system with standing, walking and sitting assistance function. Our developing system is based on a walker which is popular assistance device for aged person in normal daily life and realizes the standing and sitting motion using the support pad which is actuated by novel assistance manipulator(More)
This paper proposes a standing assistance control with a patient's load estimation for our robotic walker system. Our developing robotic walker realizes a standing assistance using its support pad which is actuated by novel assistance manipulator mechanisms on its body with four parallel linkages. Our system assists a standing motion using a remaining(More)
For reducing a risk of pressure sore caused by long period sitting on a wheelchair, a patient is required to depressurize buttocks by changing the posture suitably. Thus, we have been developed an automatic depressurization motion assistance system for a seated patient on a wheelchair. In our previous work, we developed a sitting surface coordination system(More)
For reducing the risk of pressure sore caused by long period sitting on a wheelchair, we develop a depressurization motion assistance system which is low cost and suitable for practical use. Our developing system consists of a seating cushion which the patient sits on and four air cells which can lift or incline the seating cushion. Each air cell is(More)
This paper describes experimental results on the correlation between current collapse and electroluminescence observed under high drain bias conditions in AlGaN/GaN HEMTs with high breakdown voltages over 1000 V. The electroluminescence characteristics were categorized into 2 groups: one from the drain edge with a strong white-appearance emission and the(More)
In our previous research, we have developed a novel standing assistance system, which uses a remaining physical strength of an elderly person. For realizing it, the assistance system needs to estimate the load of a patient and in many cases, the previous researchers use a joint traction which can be derived by a human linkages model kinematically for(More)