Study On Fatigue Analysis And Monitoring Of Workers In PC Production Line

With the development of building industrialization,the demand for prefabricated components has increased significantly.In order to improve output,PC component manufacturers often ignore the fatigue of assembly line workers.Excessive fatigue directly leads to low production efficiency and frequent safety accidents.As the first link of prefabricated construction,the safety of workers in the assembly line of PC components is very important.Therefore,it is necessary to analyze and monitor the fatigue of assembly PC component production line workers,reduce safety risks,and improve the safety management level of assembly production.Therefore,the paper through a large number of related literature research and analysis,combined with the assembly of PC component production line workers fatigue research.The main contents and results of the study include the following five aspects:(1)Analysis the influencing factors of the safety management of PC production line based on human factors.The production methods and processes of prefabricated PC components are summarized.Based on the analysis of the characteristics of the prefabricated PC component production line and workers’ operations,the key factors affecting unsafe behaviors are identified and exploratory factor analysis is conducted.The interpretive structure model(ISM)was used to analyze the hierarchical relationship among the influencing factors,and a hierarchical structure diagram was established.At the same time,using MICMAC to construct the driving force dependence coordinate map and find out the direct influencing factors.(2)Correlation between fatigue physiological indexes and psychological indexes of workers in PC production line.Combined with physiological and psychological fatigue state measurement methods,the physiological and psychological data of workers working on the PC production line are collected.The correlation between fatigue physiological indexes and psychological indexes is established through data analysis,which provided data support for analyzing the fatigue state of construction workers and the influence of fatigue indexes.(3)To construct the fatigue evaluation index system for workers in assembled PC production line.Through the study of psychological fatigue and physiological fatigue,the influencing factors of workers’ working fatigue in the existing PC production line were analyzed.On this basis,based on the system dynamics analysis of the cause-effect coupling between the fatigue factors of production line workers,the fatigue evaluation index system of PC production line workers was initially selected.Through the rough set theory,the index system of fatigue evaluation of workers in PC production line is finally constructed.(4)Optimization and improvement of side operation layout of PC production line based on fatigue recovery model.In this study,the defects of the existing production process are analyzed,an Improved Assembly Line-Integrated Supermarket(IALIS)model is proposed,and a material scheduling mathematical model considering fatigue recovery model is established.On this basis,an adaptive genetic algorithm based on cloud theory is used to solve the material scheduling mathematical model of PC production line considering the fatigue recovery of workers,and the number of workers in material scheduling is compared under the traditional inventory mode.Through the improved line layout,reduce the fatigue accumulation of workers,improve the efficiency of the production line,and improve the safety management level of the production line.(5)Worker fatigue monitoring of PC production line.Based on the actual survey data and the fatigue evaluation index system of PC production line workers constructed in this paper,the index of the scale is quantified.According to the characteristics of workers’ working posture in the PC production line,the REBA is used to quantify the working posture index.And a QPSO-BPNN algorithm model is proposed for monitoring.Finally,an example is given to demonstrate the rationality and monitorability of the system.Therefore,this paper provides some theoretical support for optimizing the safety management of prefabricated construction by analyzing and monitoring the fatigue of workers in the production line of PC.