Mechanical response analysis and validation of muscle strength, joint torque, and shear forces related to human movements

Abstract

In this study, the interactions between humans and the environment are measured and analyzed by several methods either directly or indirectly. Quantitative and objective measurements are obtained using a three-dimensional motion analysis system, a shear force sensor, and an anthropomorphic dummy. To evaluate the loads imposed on skin, muscles and joints during work-related human body movements. A motion analysis system is one of the most effective systems for capturing movement of the human body in three-dimensional space. The motion analysis results were used to generate virtual human body models to evaluate various human movements, such as working with a vacuum cleaner or a washing machine.Previous studies of human movements have applied well-known musculoskeletal models and analysis tools to introduce modeling systems that are easier to implement than adding new, complex methodology or overabundant tools to new models. This approach may be useful for evaluating complex human movements that are not much different from the expected results without the use of massive tools. A shear force sensor designed with a strain gauge could measure the change of strain induced by external forces on an object of interest, which could be transfer into a shear force component isolated from the external forces containing both tangential and shear forces. Moreover, the development of a shear force sensor and anthropomorphic dummy may be useful for evaluating the loads, pressure, and joint torque imposed on soft tissue and joints in the seated position.