摘要
人体呼吸参数对呼吸防护装备内部微环境的稳定性至关重要,为获得不同劳动强度下人体呼吸参数及变化规律,以相对心率指数表征劳动强度等级并设计构建呼吸参数采集系统。通过开展多人次不同劳动强度呼吸实验,记录实时瞬时心率、呼吸压力、呼吸频率数据并采集呼出气样本,进行气相色谱分析。研究结果表明:相对心率指数能够消除劳动强度表征中的个体差异及劳动形式差异,对劳动强度具有良好表征作用;呼吸压力及频率随劳动强度增加呈现增强和变大的趋势;心率及呼吸压力信号的样本熵显示,心率稳定性随劳动强度的增加而降低,呼吸模式稳定性则增强;呼出气中O_2含量随劳动强度增加而降低,CO_2与H_2O含量呈现增长趋势,绝对变化量及变化比例随劳动强度不同呈现明显差异。
The human respiratory parameters are critical to the stability of internal microenvironment in the respiratory protective equipment. In order to obtain the human respiratory parameters and variation laws under different labor intensities,the relative heart rate index( RHRI) was used to characterize the level of labor intensity,and an acquisition system of respiratory parameters was designed and constructed. Through carrying out multiple groups of respiratory experiments with different labor intensities,the real-time instantaneous heart rate,respiratory pressure and respiratory frequency were recorded,and the samples of exhaled gas were collected to conduct the gas chromatography analysis. The results showed that RHRI played good characterization role for the labor intensity,and it could eliminate the individual difference and labor form difference in the characterization of labor intensity. The respiratory pressure and frequency increased with the increase of labor intensity. The sample entropy of heart rate and respiratory pressure signals showed that with the increase of labor intensity,the stability of heart rate reduced,while the stability of respiratory mode increased. The content of O2 in the exhaled gas decreased with the increase of labor intensity,while the content of CO2 and H2O showed the increasing trend,and the absolute variation quantity and proportion presented significant difference with different labor intensities.
作者
贺帅
张英华
张歌
黄志安
高玉坤
HE Shuai;ZHANG Yinghua;ZHANG Ge;HUANG Zhian;GAO Yukun(School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2019年第5期167-172,共6页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(51474017)
关键词
劳动强度
呼吸参数
样本熵
呼出气组分
labor intensity
respiratory parameter
sample entropy
exhaled gas component
