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Proposal of Layer-Based IoT System Construction Method and Implementation to Rolling Stand-up Walker
Katsushi Ogawa,Kenji Uegami,Hiroki Aoyama,Kazuo Yonenobu,Seonghee Jeong 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
It is a problem that the elderly to spoil gait function affects the activities of daily living (ADL), and deteriorates the quality of life (QoL). In order to enhance the effect of rehabilitation in the gait function, it is desirable to increase the amount of training. In this research, we develop a measurement system for a gait training device that enables effective rehabilitation utilizing IoT and measurement technology proactively, and aims to realize ”constant rehabilitation” that consider daily lives except training time as rehabilitation. We propose an IoT measurement system model that classifies each function of IoT system in a hierarchical structure to promote system development more efficiently. Based on this model, we modularized a device for measuring the upper limb load, acceleration and gait distance, developed a device for presenting to the user via the Web, and implemented it on a commercial rolling stand-up walker and gait training device. We confirmed that we can measure normally using each mounted module.
APPLICATION OF GIANT MAGNETOSTRICTIVE MATERIAL TO DISC BRAKE ACTUATOR
Yutaka OGAWA,Yukio MURATA,kazuo KAWASE,Hiroyuki WAKIWAKA,Tsutomu MIZUNO,Hajime YAMADA 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
For the next generation railway brake system, a disc brake which can be operated directly and electrically is strongly expected. This paper deals with newly developed disc brake actuator using giant magnetostnctive materials (GMM) which can be integrated with disc brake Regarding the brake system performance, a better delay time was also attained which will contribute to shorten a stopping distance.<br/>
Hiroki Aoyama,Kazuo Yonenobu,Katsushi Ogawa,Seonghee Jeong 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
We aim to develop a robotic assistive walker that assists the users pelvis with the robotic arms. It would help the possibility that the patients or frail elderly can practice walking by themselves safely and efficiently. We measured the force and moment produced by a physiotherapist (PT) assisting the subjects gait in a wheeled upright walker under the condition of the 70% partial weight-bearing on their right foot. We verified the effects of the assistance by the PT on the walker gait, associating it with the results of the assistive patterns. Our results showed a noticeable force to assist in loading the right foot in the early stance phase and force to restrain the subjects from loading on the right foot in the midstance phase. In swing phases, we could find forces and moments to assist in swinging the lower extremities forward on both sides. We used the load on the right foot and the maximum pelvic rotation angle to verify the effect of the assistance by the PT, resulting in that we could obtain the gait characteristics with the assistance during the wheeled upright walker gait. Our outcomes can be significant for developing the robotic assistive walker.
Hiroki Aoyama,Hirofumi Hori,Kazuo Yonenobu,Kenji Uegami,Katsushi Ogawa,Seonghee Jeong 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
The purpose of this study is to represent the effect on the movement of the pelvis by the posture and the load on upper extremities in gait with the rolling stand-up walker. We measured stride length, the maximum vertical ground reaction force per body weight, the excursion of angles of trunk and pelvis in the movement of obliquity, tilt, and rotation, and the amplitude of center of mass in the vertical and lateral direction while five healthy subjects had performed the gait with a rolling stand-up walker. Our first primary outcome is that the movement of the trunk tilt and rotation, and the pelvic obliquity and rotation had been observed during the gait with the rolling stand-up walker. The second outcome is that 40 % of the load on upper extremities restricted the movement of the trunk obliquity and the pelvic tilt. The third outcome is that at 20 % of the load on upper extremities, the displacement of the pelvis in lateral and vertical direction had been limited. These suggestions could be a piece of crucial evidence to design the program in the robot-assisted walker.