The Research Of Productivity And Labor Safety In Hot Environment With Radiant Heat Of Fixed Direction

Nowadays,the safety of workers in extreme heat is receiving increasing attention.However,due to the wide variety of extreme thermal environments,it is not possible to use only one evaluation system.In particular,there are few related studies on high temperature directional thermal radiation environment,but there are many practitioners in this environment,so the analysis of human labor efficiency in hot environment with radiant heat of fixed direction and predict the human body safety is very necessary.The research goal of this paper is to determine the primary and secondary factors of human labor efficiency,and to establish a labor safety prediction model under high temperature directional thermal radiation environment.This paper carried out a human physiological stress response experiment with high-temperature directed radiation,the experimental sample was 90 people,all male.The experimental temperature is designed to be 34℃,37℃,40℃,relative humidity of 60%,radiant heat intensity of 0 k W/m~2,1 k W/m~2,2 k W/m~2,labor intensity is divided into moderate labor intensity and heavy labor intensity.The experimental design was 90minutes,and physiological data collection and questionnaires were conducted every 15minutes.According to the experimental results,the changes of human physiological indexes affected by different temperatures,radiant heat intensity and labor intensity are obtained.At the same time,the subjective thermal sensation and fatigue degree scores of the human body before and after the experiment were analyzed,and the changes under different environmental factors and labor factors were obtained.This paper also analyzes the physical work efficiency and mental work efficiency of the human body,and studies their changes under different working conditions.At the same time,it analyzes the influence of work efficiency on various factors such as temperature,radiant heat intensity and labor intensity.The extent to which interactions between various factors affect work efficiency.The results show that the factors affecting physical labor efficiency and mental labor efficiency are different.The paper also proposes a comprehensive physiological index that comprehensively evaluates the physical condition of the human body.This indicator not only considers the physiological parameters,but also adds subjective parameters of the human body.On the basis of the comprehensive physiological indicators of the human body,the ROC curve analysis is carried out,and the environmental factors,labor factors and human comprehensive physiological indicators are incorporated into the human labor safety prediction model,and the predictions of the time value and the change value of the comprehensive physiological indicators of the human body are compared.The accuracy rate and the most suitable prediction model are selected to provide a basis for the prevention and management of safety accidents in high temperature directional thermal radiation environment.