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1. 发明授权

US4522066A Temperature-compensated extensometer 失效
标题翻译：温度补偿引伸计
公开(公告)号：US4522066A
公开(公告)日：1985-06-11
申请号：US498042
申请日：1983-05-25
申请人： Walter P. Kistler , Martin D. Chinn
发明人： Walter P. Kistler , Martin D. Chinn
IPC分类号： G01B7/16 , G01B7/18
CPC分类号： G01B7/16
摘要： An extensometer having two spaced-apart mounting bases adapted to be mounted on a load-bearing structure with its axis of sensitivity intersecting the axis along which load-induced strains are generated at 45.degree.. The extensometer includes a pair of parallel links connecting the mounting bases through respective flexure hinges. In one embodiment, one of the links is also connected to one of the bases through an intermediate flexure hinge so that the link deforms responsive to relative movement applied between the bases along the axis of sensitivity. A strain gauge mounted on this link measures the magnitude of the deformation. In a second embodiment, a strain-instrumented measurement beam extends between the two links so that it deforms responsive to pivotal movement of the links as the mounting bases move in opposite directions along the axis of sensitivity. This embodiment of extensometer may be mounted on the load-bearing structure through three or more mounting points. In order to facilitate mounting of the extensometer on a structure without pre-straining the extensometer, a rigid plate may be connected to the extensometer through a plurality of pins, each of which extends from the plate through the extensometer at each of the mounting points. The pins terminate in a point and they are biased against the structure by a threaded fastener extending from the plate, through the extensometer, and into the structure.
摘要翻译：具有两个间隔开的安装基座的引伸计，其适于安装在承载结构上，其感测轴与45°处产生负载引起的应变的轴相交。引伸计包括一对平行的连接件，通过相应的弯曲铰链连接安装基座。在一个实施例中，一个连杆还通过中间弯曲铰链连接到一个基座，使得连杆响应于沿着灵敏轴线在基座之间施加的相对运动而变形。安装在该连杆上的应变计测量变形的大小。在第二实施例中，应变仪器测量光束在两个连杆之间延伸，使得当安装基座沿着敏感轴线沿相反方向移动时，响应于连杆的枢转运动而变形。引伸计的这个实施例可以通过三个或多个安装点安装在承载结构上。为了便于将引伸计安装在结构上而不预拉伸引伸计，刚性板可以通过多个销连接到引伸计上，每个销在每个安装点处从板延伸穿过引伸计。销终止于一点，并且它们通过从板延伸穿过引伸计并进入结构的螺纹紧固件偏压在结构上。

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