Department of Industrial Engineering, King Mongkut's University of Technology North Bangkok, Bangkok, Thailand.
Int J Occup Saf Ergon. 2013;19(3):355-69. doi: 10.1080/10803548.2013.11076990.
This paper presents an analytic procedure to assist safety practitioners in evaluating the audibility of an existing auditory warning system in their workplaces. Two alarm location models are described: (a) a model with an unknown signal sound level, and (b) a model with a known signal sound level. A heuristic algorithm to determine a minimum number of alarm devices and their locations so that the warning signals can be clearly heard by workers is also proposed. The algorithm considers the ambient noise level, noise levels generated by individual machines, locations where workers are likely to be present, and noise levels at worker locations. From the numerical examples and the computation experiment, both the optimization and heuristic approaches yield solutions that satisfy the 15-dBA constraints. The heuristic approach is efficient in solving large alarm location problems due its capability to find near-optimal solutions within reasonable computation time.
本文提出了一种分析程序，以帮助安全从业人员评估其工作场所现有听觉报警系统的可听度。描述了两种报警位置模型：（a）信号声级未知的模型，和（b）信号声级已知的模型。还提出了一种启发式算法，以确定最少数量的报警装置及其位置，以便工人能够清晰地听到警告信号。该算法考虑了环境噪声水平、单个机器产生的噪声水平、工人可能存在的位置以及工人位置的噪声水平。从数值示例和计算实验可以看出，优化和启发式方法都得到了满足 15-dBA 约束的解决方案。由于能够在合理的计算时间内找到接近最优的解决方案，启发式方法在解决大型报警位置问题时效率很高。
