The objective of this research was to design and examine a new tool for the removal of chamber lids (manhole covers) called the chamber lid removal tool (CLRT). The CLRT was compared to a pickaxe and J-hook for removing two types of lids using a handheld force meter and an inertial motion capture system. Wearable motion capture was used for monitoring motions in the field. At L4/L5, resultant moment was significantly lower when removing the lids with the CLRT. Significant (p < .05) decreases in resultant moment were observed for the left and right shoulder when using the CLRT.

中文翻译：

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在电力公司评估用于拆卸箱盖的新型工具设计

这项研究的目的是设计和检查一种称为腔盖去除工具（CLRT）的用于去除腔盖（人孔盖）的新工具。使用手持式测力计和惯性运动捕获系统，将CLRT与镐和J型钩进行了比较，以去除两种类型的盖子。穿戴式运动捕捉器用于监测野外运动。在L4 / L5处，用CLRT取下盖子时的合力明显降低。使用CLRT时，左肩和右肩的合力矩显着降低（p <.05）。