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目的视屏终端(VDT)使用过程中的工效学风险暴露能够导致肌肉骨骼疾病症状。触摸屏技术及其应用正在快速发展。该文拟对视屏作业中触摸屏指向操作工效学评价方法进行研究。方法利用LM体感传感器和表面肌电采集分析系统,创建视屏作业触摸屏指向操作工效学评价方法,包括:手部运动捕捉系统、表面肌电采集系统、指向任务和自感问卷。选取了触摸屏指向操作常见的点击和拖拽进行实验性的工效学评价。结果点击和拖拽的成功率点击(75.9%±12.8%),拖拽78.8%±14.9%)和精确率(点击2.06±0.89,拖拽2.12±0.78)没有显著差异。指向速度点击(161.5±21.5 mm/s,拖拽128.3±15.2 mm/s)和指向距离比值(点击1.28±0.15,拖拽1.09±0.19)存在显著差异。点击操作中EDC肌肉的MVC%(25.6±5.1%)显著高于拖拽操作中的MVC%(13.2±3.9%)。被测肌肉中位频率(MF)时间变化率无显著差异。结论结果证明了点击和拖拽的动作与肌肉负荷差异,初步验证该工效学评价方法能准确、有效的分析立体空间中的触摸屏指向操作,也有可能扩展到更复杂的触摸屏使用场景。
Ergonomic risk exposure during the intended VDT use can cause symptoms of musculoskeletal disorders. Touch screen technology and its applications are rapidly evolving. This article intends to study the touch screen operation ergonomics evaluation method in the screen operation. Methods Using the LM somatosensory sensor and surface electromyography acquisition and analysis system, a method of ergonomics evaluation of touch screen operation was established, which included hand motion capture system, surface electromyography acquisition system, pointing task and self-inductance questionnaire. Select the touch-screen pointing to the common click and drag for experimental ergonomic evaluation. Results There was no significant difference in click-and-drag success rates (75.9% ± 12.8%, drag and drop of 78.8% ± 14.9%) and accuracy (clicks of 2.06 ± 0.89 and drag of 2.12 ± 0.78). There were significant differences in pointing speed (161.5 ± 21.5 mm / s, drag 128.3 ± 15.2 mm / s) and pointing distance (click 1.28 ± 0.15, drag 1.09 ± 0.19). The MVC% (25.6 ± 5.1%) of the EDC muscle in the click operation was significantly higher than the MVC% (13.2 ± 3.9%) in the drag operation. There was no significant difference in the rate of change in the median frequency (MF) of muscle under test. Conclusion The results demonstrate the difference between click and drag movements and muscle load. It is preliminarily verified that this ergonomic evaluation method can accurately and effectively analyze the touch screen pointing operation in stereo space and may also be extended to more complex touch screen usage scenarios.