新型视屏作业上肢疲劳检测系统设计与实验验证  

Design of VDT operation related upper extremities fatigue detection system and experimental verification

作　　者：韩承[1] 张万超[1] 李树新[1] 唐慧晶[1] 刘保峰[1] 张健[1] HAN Cheng;ZHANG Wan-chao;LI Shu-xin;TANG Hui-jing;LIU Bao-feng;ZHANG Jian(Tianjin Centers for Disease Control and Prevention,Tianjin 300011,China)

机构地区：[1]天津市疾病预防控制中心,天津300011

出　　处：《医疗卫生装备》2018年第1期19-22,57,共5页Chinese Medical Equipment Journal

摘　　要：目的 :对以按键时长为指标的视屏终端(video display terminals,VDT)作业上肢疲劳检测系统进行初步设计,并进行实验验证。方法:该系统由能够计算、比较和分析按键时长的软件部分和满足正常VDT作业的硬件部分组成。受试对象在受控条件下进行键盘打字作业,并运行该系统。通过表面肌电和标准问卷方法测量指浅屈肌(flexor digitorum superficialis,FDS)、指总伸肌(extensor digitorum communis,EDC)以及腕桡侧伸肌(extensor carpi radialis,ECR)、腕尺侧伸肌(extensor carpi ulnaris,ECU)的肌肉疲劳。结果:随着按键数量的累积,按键时长全过程下降了1.3%;FDS的最大肌力百分比(MVC%)全过程下降了22.9%;EDC的MVC%全过程下降了47.9%,降幅最大;打字主观肌肉疲劳程度增加。结论:揭示了按键时长和相关肌肉疲劳的变化规律,证明了按键时长作为VDT作业上肢疲劳指标的可能性,验证了该设计的可行性和有效性。Objective To design a VDT operation related upper extremities fatigue detection system using keying duration(KD)as an indicator of fatigue and to execute experimental verification.Methods The system included the software part able to calculate,compare and analyze KD and hardware part able to support normal VDT operations.Subjects finished typing task under controlled condition while the system was running.The flexor digitorum superficialis(FDS),extensor digitorum communis(EDC),extensor carpi radialis(ECR),extensor carpi ulnaris(ECU)muscle fatigue were retrieved by sEMG method and standardized questionnaire.Results As the number of keystrokes increased,KD shortened by 1.3%,FDS MVC%dropped by 22.9%,and EDC MVC%decreased by 47.9%.The perceived level of typing fatigue also increased.Conclusion Results revealed KD's change with fatigue,showing the possibility of using KD as an indicator of fatigue and validating the feasibility and effectiveness of the system design.

关 键 词：视屏作业 键盘 疲劳 肌肉骨骼损伤 工效学 

分 类 号：R318[医药卫生—生物医学工程] R685[医药卫生—基础医学]