标题：Experimental Study of Coupling Fiber-optic Vibration Sensor Based on Variational Theory
作者：Ma, Bin; Gao, Houlei
作者机构：[Ma, Bin] Shandong Univ, Sch Elect Engn, Jinan 250061, Shandong, Peoples R China.; [Gao, Houlei] Shandong Univ Polit Sci & Law, Dept Informat & Tech 更多
会议名称：2nd International Conference on Mechatronics and Intelligent Materials (MIM 2012)
会议日期：MAY 18-19, 2012
来源：MECHATRONICS AND INTELLIGENT MATERIALS II, PTS 1-6
关键词：fused biconical taper; optical fiber coupler; coupling ratio;; variational theory
摘要：According to the character of fiber-optic coupler, its coupling output is sensitive to the variation of coupling region's length. A new kind of coupling fiber-optic vibration sensor is presented base on this principle. The theory of coupling single-mode fiber-optic sensor is analyzed. A prototype of fiber optic vibration detection system has been successfully built, including a sensor head, a low-cost control unit and a software package for signal processing with high resolution. The response of fiber-optic sensor and piezoelectric sensor to periodic vibration and shock is measured and the results of the coupling fiber-optic vibration sensor are closely in accordance with high precision piezoelectric sensor. The cross-axis anti-disturbance ability of the fiber-optic sensor is discussed in addition. Experimental results indicate that the coupling fiber-optic vibration sensor has favorable vibration detection capability; it can meet the requirement of vibration measurement.