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1. 发明授权

US4314481A Piezeolectric strain transducer 失效
标题翻译：电压应变传感器
公开(公告)号：US4314481A
公开(公告)日：1982-02-09
申请号：US105703
申请日：1979-12-20
申请人： Peter Wolfer , Hans-Rudolf Derrer , Max Vollenweider , Hans-Conrad Sonderegger
发明人： Peter Wolfer , Hans-Rudolf Derrer , Max Vollenweider , Hans-Conrad Sonderegger
IPC分类号： G01B7/16 , G01L1/16
CPC分类号： G01L1/16 , G01B7/16
摘要： A piezoelectric strain/force transducer is described, which is attached preferably by only one locking screw to a test specimen or machine part. The force transmitting member of the transducer comprises two bearing surfaces at a distance apart, which bear frictionally on the surface of the machine part and experience a change in spacing in the case of a change in length of the machine part. Due to this, a resilient member, which can be adapted to a desired sensitivity of the gauge, is tensioned and a set of piezoelectric plates held under precompression in the force-transmitting member are subjected to a corresponding shearing force. The piezoelectric plates are cut or polarized so that they respond piezoelectrically solely to shearing forces. The resulting piezoelectric charge is a measurement of the strain or mechanical stress of the machine part and can be used for monitoring or controlling machines or components, in particular those which are subjected to cyclic loads.
摘要翻译：描述了压电应变/力传感器，其优选地通过仅一个锁定螺钉附接到测试样本或机器部件。换能器的力传递部件包括距离分开的两个轴承表面，它们在机器部件的表面上摩擦地承受，并且在机器部件的长度变化的情况下经历间隔的变化。由此，弹性构件可以适应于量规的期望灵敏度，并且在力传递构件中保持在预压缩下的一组压电板受到相应的剪切力。压电板被切割或极化，使得它们仅对剪切力进行压电反应。所得到的压电电荷是机器部件的应变或机械应力的测量，并且可以用于监测或控制机器或部件，特别是经受循环负载的机器或组件。

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