Comprehensive Fall-Risk Assessment of Construction Workers Using Inertial Measurement Units: Validation of the Gait-Stability Metric to Assess the Fall Risk of Iron Workers
Comprehensive Fall-Risk Assessment of Construction Workers Using Inertial Measurement Units: Validation of the Gait-Stability Metric to Assess the Fall Risk of Iron Workers
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DOI：
10.1061/(asce)cp.1943-5487.0000511
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发表时间：
2016-05-01
影响因子：
6.9
通讯作者：
Stentz, Terry L.
中科院分区：
文献类型：
--
作者：
Jebelli, Houtan;Ahn, Changbum R.;Stentz, Terry L.
在建筑工地，滑倒、绊倒和福尔斯是致命伤害的主要原因。这一事实表明，需要一个安全评估方法，提供了一个全面的跌倒风险分析，包括建筑工人的生理特征的影响。在此背景下，本研究测试的有用性的最大李雅普诺夫指数（最大LE）作为一个指标，以评估建筑工人的综合跌倒风险。Max LE是在临床环境中建立的步态稳定性指标之一，用于评估建筑工人对非常小的干扰的稳定性。为了验证Max LE的使用，设计并进行了一组实验室实验，要求一组受试者模拟钢铁工人在I形梁上的行走任务。这些任务旨在展示各种跌倒风险特征：以舒适的步行速度行走呈现出较低的跌倒风险特征;单侧负重和在工字梁上以更快的速度行走都呈现出较高的跌倒风险特征。惯性测量单元（IMU）传感器被连接到参与者身体的右脚踝，以收集运动学数据，用于计算最大LE。结果表明，最大LE提供了足够的区分能力，用于表征各种建筑工人的任务的跌倒风险，以及引入的方法来计算从人体捕获的IMU传感器数据的步态稳定性可以提供一个有价值的分析安全相关的风险存在于建筑工人的运动。(C)2015年美国土木工程师协会。
In construction worksites, slips, trips, and falls are major causes of fatal injuries. This fact demonstrates the need for a safety assessment method that provides a comprehensive fall-risk analysis inclusive of the effects of physiological characteristics of construction workers. In this context, this research tests the usefulness of the maximum Lyapunov exponents (Max LE) as a metric to assess construction workers' comprehensive fall risk. Max LE, one of the gait-stability metrics established in clinical settings, estimates how the stability of a construction worker reacts to very small disruptions. In order to validate the use of Max LE, a laboratory experiment that asked a group of subjects to simulate iron workers' walking tasks on an I-beam was designed and conducted. These tasks were designed to showcase various fall-risk profiles: walking with a comfortable walking speed presented a low fall-risk profile; carrying a one-sided load and walking at a faster speed on the I-beam both presented high fall-risk profiles. Inertial measurement unit (IMU) sensors were attached to the right ankle of participants' bodies to collect kinematic data for the calculation of Max LE. The results showed that Max LE offers adequate distinguishing power for characterizing the fall risk of various construction workers' tasks, and the introduced approach to compute the gait stability from IMU sensor data captured from human bodies could provide a valuable analysis of the safety-related risks present in construction workers' motions. (C) 2015 American Society of Civil Engineers.