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Advancement of IoH/IoT “Assist Suits” to Support Workplaces with Heavy Lifting and Telescopic System to Enable Further Reduction of Stress Applied to Knee Joints
Taishi Nakazawa, Yasuhiro Kawahara, Hiroshi Yoshida
There are increasing numbers of Assist Suits in workplaces where heavy lifting is required. These suits are typically designed to reduce the stress applied to the lower back region. However, some of the workplaces have started to use more of the knee flexion in order to reduce the stress of the lower back. This led to the research on effective functions to reduce the stress applied to the knee. Through the maximum lifting test and measurement of EMG in the surface, the effect of the proposed device was investigated. In addition, testing with three different levels of assistance strengths and how it affects the wearer’s feeling of the assistance led to a finding that as the level of the assistance increases, the wearer feels more assistance accordingly. Furthermore, If the angle of the knee extension can be measured with the device using the IoH/IoT functions of the assisted suits, it could be used as an indication of fatigue accumulated through work by combining with other indicators such as changes in the duration between tasks.
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