CHARACTERIZATION OF POSTURE, FORCE & REPETITIVE MOTION

累积性创伤障碍由以下因素引起、加重和加重： 重复性的运动和运动工人通常需要 他们必须做出的笨拙的姿势。目前没有 保护工人免受过度伤害的量化标准 暴露在这些危险中。 但在剂量-反应关系可以 建立了导致接触标准，以防止这些 疾病，需要实用的方法来测量和表征 工人暴露于累积的创伤压力因素。 该项目将开发有效的分析技术， 与手部密集型任务相关的身体压力，包括 重复的动作和有力的努力。 一种实用仪器 将实施一个系统，用于连续测量手腕姿势， 手的力量。 将研究光谱分析的使用 以任务重复性、强制性和姿势压力为特征。 数据将被转换到频域，以确定 重复运动和用力的频率和幅度 在手工作业中进行。 心理物理测量 疲劳和不适将与姿势和力量相关 用于频率加权数字滤波器设计的频谱分量 物理应力测量，用于控制与 重复的任务。 最后，能够表征和减少 与重复运动有关的应力和应变将 使用实验室模拟的工业任务进行测试， 在工作场所执行的实际任务。

Cumulative trauma disorders are caused, aggrevated and precipatitated by repetitive exertions and movements workers are routinely required to perform, and awkward postures they must assume. Currently there are no quantitative standards available for protecting workers from excessive exposure to these hazards. But before dose-reponse relationships can be established leading to exposure standards for preventing these disorders, practical methods are needed for measuring and characterizing worker exposure to cumulative trauma stress factors. This project will develop efficient analytical techniques for assessing physical stress strain associated with hand-intensive tasks containing repetitive motion and forceful exertions. A practical instrumentation system will be implemented for continuously measuring wrist posture and hand force. Use of spectral analysis will be investigated characterizing task repetitiveness, forcefulness, and postural stress. Data will be transformed into the frequency domain for determining the frequency and magnitude of repetitive motion and forceful exertions performed during manual work. Psychophysical measures of localized fatigue and discomfort will be correlated with posture and force spectral components for designing digital filters for frequency-weighted physical stress measurements for controlling strain associated with repetitive tasks. Finally capability for characterizing and reducing stress and strain associated with repetitive motion exertions will be tested using both industrial tasks simulated in the laboratory and actual tasks performed in the workplace.