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    • 10. 发明申请
    • STRAIN MEASURING DEVICES, AND MONITORING OF VEHICLE CONTAINER LOADS
    • 应变测量装置和车辆集装箱负荷监测
    • WO1997004289A1
    • 1997-02-06
    • PCT/GB1996001725
    • 1996-07-18
    • MAYWOOD INSTRUMENTS LIMITEDBAKER, Michael, Anthony
    • MAYWOOD INSTRUMENTS LIMITED
    • G01G03/12
    • G01G3/12B60G17/019B60G2300/026B60G2400/60B60G2401/12B60G2401/122B65F2003/022G01G19/083
    • A differential strain gauge unit for providing measurements of the difference in strain in two adjacent portions of a structure (2) comprises a bar (8) for securing alongside the structure, first (15), second (16) and third (17) securing means spaced apart along the bar and adapted to secure the bar locally to the structure at first, second and third spaced-apart securing locations (18', 19', 20') respectively, the bar being relieved at a first strain gauge position (24) intermediate the first and second securing means, and at a second strain gauge position (27) intermediate the second and third securing means, the relieved portions of the bar being elastically deformable to permit the bar to be longitudinally extended and contracted in use in response to changes in the longitudinal spacing of the first, second and third locations of the structure due to strain of the structure, and first (29, 30) and second (32, 33) strain gauges associated respectively with the relieved portions to provide strain gauge outputs responsive to the elastic deformations of the respective relieved portions.
    • 用于提供对结构(2)的两个相邻部分中的应变差的测量的差分应变仪单元包括用于固定在结构旁边的第一(15),第二(16)和第三(17)固定的杆(8) 沿着杆间隔开并且适于将杆固定在第一,第二和第三间隔开的固定位置(18',19',20')处的结构上,杆在第一应变仪位置 24)在第一和第二固定装置之间,并且在第二和第三固定装置中间的第二应变计位置(27)处,杆的缓解部分是可弹性变形的,以允许杆在使用中纵向延伸和收缩 响应于结构的第一,第二和第三位置的纵向间隔的变化,以及分别与释放部分相关联的第一(29,30)和第二(32,33)应变计, 响应于相应的卸载部分的弹性变形而产生应变计输出。