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中文摘要：
为了提高和改善高温环境热压力对人体影响程度评价方法的准确性,在人工气候室中营造高温热环境,湿球黑球温度（WBGT）分别为30,28,26℃时,研究受试者体力活动时心率的变化规律,提出利用心率作为作业现场快速评价高温热压力水平的方法。研究结果表明,在中国现行热压力评价标准GB/T 17244-1998规定的指数限值内,心率与人员活动强度具有线性关系（R2=0.780,p〈0.01）,利用心率能够较好地预测实际活动强度,提高高温环境热压力安全评价的有效性。研究提出了不同WBGT指数下允许的最大心率水平,并认为现行评价标准中规定的WBGT指数限值能够保证劳动者健康。
英文摘要：
The purpose of this study is to improve the influence evaluation method of heat stress on human body in high temperature environment. High temperature environment （WBGT= 30,28,26 ℃）is created in climatic chamber to research manual labor＇s heart rate variation in different metabolic rates, and to achieve an optimized heat stress evaluation method based on WBGT-index and heart rate. The result shows that in the range of Chinese current standard, the relationship between heart rate and metabolic rate is linear （R2= 0.780,p〈0.01）. Heart rate can predict the metabolic rate well and improve the efficiency of heat stress evaluation. Maximum heart rates under different WBGT-indexes are presented, and it＇s showed the limitations of the national heat stress standard can well protect manual labor＇s health.
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