Heat strain experienced by individuals wearing chemical protective clothing(CPC)is severe and dangerous especially in hot-humid environment.The development of material science and interdisciplinary studies including e...Heat strain experienced by individuals wearing chemical protective clothing(CPC)is severe and dangerous especially in hot-humid environment.The development of material science and interdisciplinary studies including ergonomics,physiology and heat transfer is urgently required for the reduction of heat strain.The aim of this paper was to study the relationship among clothing thermal properties,physiological responses and environmental conditions.Three kinds of CPC were selected.Eight participants wore CPC and walked(4 km/h,two slopes with 5%and 10%)on a treadmill in an environment with(35±0.5)℃ and RH of(60±5)%.Core temperature,mean skin temperature,heart rate,heat storage and tolerance time were recorded and analyzed.Physiological responses were significantly affected by the clothing thermal properties and activity intensity in hot-humid environment.The obtained results can help further development of heat strain model.New materials with lower evaporative resistance and less weight are necessary to release the heat strain in hot-humid environments.展开更多
热应激会降低工作效率并导致热相关疾病。为了量化高温环境下环卫工人的热应激水平,建立一个生理状态安全评价指标(physiological state safety evaluation index,PSEI)。首先,引入尖点突变理论分析不同热环境下人体生理状态变化趋势。...热应激会降低工作效率并导致热相关疾病。为了量化高温环境下环卫工人的热应激水平,建立一个生理状态安全评价指标(physiological state safety evaluation index,PSEI)。首先,引入尖点突变理论分析不同热环境下人体生理状态变化趋势。其次,基于信息熵和变权理论计算生理指标的权重,并利用尖点突变级数法建立人体生理状态评价体系。最后,提出新评价指标PSEI以量化生理状态安全水平,并在此基础上确定PSEI的安全等级。结果表明:在不同环境条件和生理状态下,生理指标的权重是变化的;平均皮肤温度、耳膜温度、收缩压和心率的权重范围分别为0.09~0.64、0.08~0.41、0.07~0.74和0.06~0.33;PSEI的安全等级为:非常安全(0.948,1]、相对安全(0.886,0.948]、中等(0.798,0.886]、相对危险(0.649,0.798]和非常危险[0,0.649]。PSEI可为高温环境下环卫工人提供实时的生理状态安全评估和健康预警。展开更多
文摘Heat strain experienced by individuals wearing chemical protective clothing(CPC)is severe and dangerous especially in hot-humid environment.The development of material science and interdisciplinary studies including ergonomics,physiology and heat transfer is urgently required for the reduction of heat strain.The aim of this paper was to study the relationship among clothing thermal properties,physiological responses and environmental conditions.Three kinds of CPC were selected.Eight participants wore CPC and walked(4 km/h,two slopes with 5%and 10%)on a treadmill in an environment with(35±0.5)℃ and RH of(60±5)%.Core temperature,mean skin temperature,heart rate,heat storage and tolerance time were recorded and analyzed.Physiological responses were significantly affected by the clothing thermal properties and activity intensity in hot-humid environment.The obtained results can help further development of heat strain model.New materials with lower evaporative resistance and less weight are necessary to release the heat strain in hot-humid environments.
文摘热应激会降低工作效率并导致热相关疾病。为了量化高温环境下环卫工人的热应激水平,建立一个生理状态安全评价指标(physiological state safety evaluation index,PSEI)。首先,引入尖点突变理论分析不同热环境下人体生理状态变化趋势。其次,基于信息熵和变权理论计算生理指标的权重,并利用尖点突变级数法建立人体生理状态评价体系。最后,提出新评价指标PSEI以量化生理状态安全水平,并在此基础上确定PSEI的安全等级。结果表明:在不同环境条件和生理状态下,生理指标的权重是变化的;平均皮肤温度、耳膜温度、收缩压和心率的权重范围分别为0.09~0.64、0.08~0.41、0.07~0.74和0.06~0.33;PSEI的安全等级为:非常安全(0.948,1]、相对安全(0.886,0.948]、中等(0.798,0.886]、相对危险(0.649,0.798]和非常危险[0,0.649]。PSEI可为高温环境下环卫工人提供实时的生理状态安全评估和健康预警。
