Abstract
A measuring system for the more thorough analysis of muscular strain at assembly workplaces was developed. These workplaces were often based on the application of systems of predetermined motion time. The new measuring system makes use of the well-established method of electromyography, and synchronous recording of the hand-arm-shoulder motions by means of ultrasonic signals. Furthermore, a new calibration apparatus was installed, and used for the recording of maximum forces of several hand-arm-shoulder muscles during dynamic arm movements. The experimental arrangement aimed to support the design of a workplace layout, which could be used to indicate low strain motions and low strain work areas for the reach of the upper extremities. The results, yielded by the application of the measuring and evaluation system, can be the basis for a system of predetermined strain. Monitoring five muscles as an example, the application of the system for the analysis of different work rates and a worker-friendly assembly area is illustrated.
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