地下工程内人体对CO_(2)浓度的生理响应试验研究

Experimental study on human physiological responses under different CO_(2) concentration in underground engineering

为预防高CO_(2)体积分数(即浓度)损伤人员机体,保障地下人员安全,基于人体隔绝试验,分析地下人员对CO_(2)体积分数的生理响应特征。在苏州某地下人防工程中,对170名受试者进行12 h密闭隔绝现场试验,监测不同CO_(2)体积分数下(0.1%~1%),人员心率、血压、血氧饱和浓度、心电(ECG)、皮肤电和静态脑电变化特性,分析心率变异性(HRV)及皮电反应。研究结果表明:短期暴露在CO_(2)体积分数不高于0.7%的环境中不会引起人体显著的生理响应;CO_(2)体积分数上升至0.85%时,受试者心率和HRV显著降低,HRV低频功率(LF)及高频功率(HF)、HRV中快速变化成分和舒张压显著升高;CO_(2)体积分数达到1%时,受试者皮肤电导及皮电水平显著降低;此外,CO_(2)体积分数升高,受试者α波节律被抑制,β波及KC复杂度增加。

In order to prevent physiological damage caused by high CO_(2) level and ensure security of occupants in underground space,their physiological responses to CO_(2) level were analyzed based on human isolation experiment.A natural isolation experiment was performed with 170 subjects for 12 h in an underground civil air defense project in Suzhou.Changes of their heart rate,blood pressure,blood oxygen saturation,electroencephalogram,electrodermal activity,and electroencephalography were measured at different CO_(2) levels(0.1%-1%),and HRV and electrodermal response were analyzed.The results show that there are no significant physiological responses when CO_(2) concentration is no higher than 0.7%.When it rises to 0.85%,subjects’heart rate and HRV decrease obviously while low frequency(LF),high frequency(HF)and rapidly changing components of HRV and diastolic blood pressure all increase significantly.And as it grows to 1%,remarkable skin conductance and skin conductance level are recorded.Furthermore,suppressed alpha wave,increased beta wave and KC(Kolmgorov Complexity)complexity are also observed along with increase of CO_(2) level.