Research On Factors Of The Fatigue Assessment Based On SEMG On The Design Of Load Carrriage System

With the increase of people gathering places and the density of buildings,fire rescue forces have played a very important role in maintaining urban order,and the work of firefighters has become more complex and dangerous.Due to the characteristics of fire rescue work,firefighters need to carry all kinds of heavy fire rescue equipment for personal protection.At the same time,it also accelerates the fatigue of firefighters.Health and safety cause hidden dangers and cause musculoskeletal diseases.At present,domestic fire rescue equipment still lacks in man-machine design,and pays little attention to the hazards caused by fatigue.Therefore,based on the fatigue assessment of surface electromyography,this paper studies the relevant factors affecting fatigue in the carrying system under the relevant theoretical framework of ergonomics,in order to design a device to reduce fatigue,reduce the risk of musculoskeletal diseases,and improve carrying performance.The fire-fighting piggyback system is targeted.This paper sorts out the characteristics of the crowd,equipment composition,carrying environment and carrying behavior in the fire rescue scene through design research.Combined with the literature,the relevant factors of the carrying system are summarized and analyzed,and the core influencing factors and evaluation latitudes are extracted.Design experiments,use surface electromyography and subjective evaluation scales and other tools to explore the relevant factors of the carrying system and the selection of carrying combinations in different scenarios,determine the range of design parameters and propose design guidelines.Finally,based on user interviews,the relevant requirements are summarized and sorted,combined with the aforementioned experiments,to complete the design practice,which provides a theoretical basis and reference for the range of parameters for the design of the fire protection backpack system on the market.