Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Italy.
Department of Civil Engineering, Environment and Architecture, University of Cagliari, Italy; CENTRALABS Sardinian Center of Competence for Transportation, Cagliari, Italy.
Appl Ergon. 2017 Nov;65:105-111. doi: 10.1016/j.apergo.2017.06.007. Epub 2017 Jun 13.
This study investigated changes in task-induced trunk sway of quay crane operators during a four-hour shift performed in a dedicated simulator as an indicator of postural control system effectiveness. Using a pressure sensitive mat placed on the seat pan, center-of-pressure (COP) time series were acquired and processed to calculate sway area, path length and COP displacements and velocities. The results show a well-defined linear trend for sway path and area, with significant increases starting from 65 to 155 min of work respectively. This indicates non-optimized trunk control most likely originated by the combination of physical and cognitive workload and suggests a possible role of long-term monitoring of trunk sway of crane operators as a useful tool in detecting non-optimized movements potentially associated with deteriorating performance.
本研究旨在通过在专用模拟器中进行四小时的轮班，调查码头起重机操作员在任务诱导的躯干晃动方面的变化，以此作为姿势控制系统有效性的指标。使用放置在座垫上的压力敏感垫，采集并处理中心压力（COP）时间序列，以计算晃动面积、路径长度和 COP 位移和速度。结果显示，晃动路径和面积呈现出明确的线性趋势，从 65 分钟到 155 分钟的工作时间，分别呈现出显著的增加。这表明躯干控制不佳，最可能是由身体和认知工作量的综合作用引起的，这表明对起重机操作员躯干晃动的长期监测可能作为一种有用的工具，用于检测与性能下降相关的非优化运动。
