| 摘要 |
A monitoring device for indicating relative motion between first and second structural members. The motion monitoring device includes a first component with a base and a markable indicator member. The markable indicator is disposed on the top surface of the base, and the bottom surface of the base is fixedly mounted to the first structural member. The second component includes a base, a support arm and a marking indicator member. The second component base, which is fixedly mounted to the second structural member, is connected to one end of the support arm. The other end of the support arm is connected to the marking indicator member. The first component and the second component are operationally alignable upon mounting to the respective first and second structural members such that the markable indicator member and the marking indicator member achieve contact therebetween. When operationally aligned, movement of one of the structural members relative to the other structural member results in a mark being placed on the markable indicator member by the marking indicator member to record the relative movement.
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