A newly developed radio frequency wireless passive highly sensitive strain transducer
A newly developed radio frequency wireless passive highly sensitive strain transducer
复制标题
新开发的射频无线无源高灵敏应变传感器
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
G. DeJean
中科院分区：
文献类型：
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作者：
T. Thai;H. Aubert;P. Pons;R. Plana;M. Tentzeris;G. DeJean
提出了一种基于贴片天线的高灵敏度无线无源射频应变传感器的设计方案。在开环间隙使用悬臂梁的新想法显著提高了谐振频率漂移的灵敏度。在测量中，原型达到了每1%应变1.26%的频移灵敏度，而在模拟中，新设计的理论灵敏度达到了现有射频无源无线应变传感器设计的4倍以上。地平面允许传感器的灵敏度独立于所施加的表面。作为概念验证，文中还讨论了基于该应变传感器的被动遥感系统实现实例。
A novel design of a highly sensitive wireless passive radio frequency strain transducer is presented based on a patch antenna loaded with an open loop that is capable of sensing strain remotely. The new idea of utilizing a cantilever at the gap of the open loop significantly improves the sensitivity of resonant frequency shifts. In measurements, the prototypes achieve a sensitivity of 1.26% frequency shift per 1% strain, while in simulations the new design achieves a theoretical sensitivity up to 4 times higher than existing designs of RF passive wireless strain transducers. The ground plane allows for the sensitivity of the sensor to be independent from the applied surface. An implementation example of the passive remote sensing system based on the proposed strain transducer is also discussed as a proof-of-concept.