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介绍一种用光纤环作为敏感元件的测力系统.该系统根据光强度调制理论,通过测定在力作用下光纤环的弯曲损耗来确定被测力值;应用锁相放大技术进行微弱信号检测.系统的测力范围可通过选用承压板间不同刚度的弹簧加以扩大或缩小.
This paper introduces a kind of force measuring system with optical fiber loop as sensitive element.The system determines the measured value by measuring the bending loss of the fiber ring under the action of force according to the theory of light intensity modulation and the weak signal detection by using the phase lock amplification technology. The system’s force range can be expanded or contracted by using springs of different stiffness between the pressure plates.