Research On Human Physiological Parameters And Weights Impact Under Extreme Hot And Humidity Environment

environments were more and more prevalent in many industries. Occupational health and safety under extreme environments also were major concerns in society. In foreign countries, many studies had been conducted on extreme environments, and relevant standards and specifications were promulgated in order to guarantee health and safety. Although there were also a number of relevant safety standards introduced in our country, at present the studies in extreme environments usually were based on foreign standards. Because of the significant differences in climate, geography, race, lifestyle and other factors between China and foreign countries, not all indexes were suitable for Chinese people. Therefore, it's necessary to establish the physiological indexes database for Chinese people.Extreme environments include many complex harsh environmental factors such as high temperatures, high humidity, strong radiation, lack of oxygen, etc. The extreme hot and wet environment was mainly studied. In previous studies the maximum relative humidity was usually set to 80%. But in this research the maximum relative humidity was set to 90% to explore the special extreme hot and humidity environment. Then the physiological indexes were measured to assessment physiological effects of the thermal environment.A climate chamber was built in Tianjin University to simulate the micro-climate. Some health of college students were chosen as test samples. In this experimental research, there were four ambient environments with different temperature and humidity: 25℃50% (as comfortable environment), 30℃90%, 35℃90% and 40℃90%. And 3 kind of labor intensity was mild, moderate and severe. The samples'oral temperature, skin temperature, nasal temperature, heart rate, metabolic rate, blood oxygen saturation, skin conductivity in different ambient environment and labor intensity were measured.Through experimental results, the physiological indexes trends in different ambient environment and labor intensity were analyzed to determine the threshold of physiological indexes at the heat tolerance limits. For the indexes with large difference between men and women, male and female samples were compared respectively to find the differences. Through the factor analysis method, analysis of weight of the physiological indexes, except blood oxygen saturation and skin conductivity, was taken to gain the comprehensive evaluation of physiological indexes finally.