Flextensional fiber Bragg grating-based accelerometer for low frequency vibration measurement  

作　　者：张敬花 乔学光 忽满利 冯忠耀 高宏 杨扬 周锐 

机构地区：[1]Department of Physics,Northwest University of China

出　　处：《Chinese Optics Letters》2011年第9期25-28,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 60727004 and 61077060);the National High Technology Research and Development Program of China (Nos. 2007AA03Z413 and 2009AA06Z203);the International S&T Cooperation Project of MOST of China (No. 2008CR1063);the Key Scientific and Technological Research Project of Shaanxi Province,China (Nos. 20092KC01-19 and 2008ZDGC-14)

摘　　要：The intelligent structural health monitoring method, which uses a fiber Bragg grating （FBG） sensor, is a new approach in the field of civil engineering. However, it lacks a reliable FBG-based accelerometer for taking structural low frequency vibration measurements. In this letter, a fiextensional FBG-based accelerometer is proposed and demonstrated. The experimental results indicate that the natural frequency of the developed accelerometer is 16.7 Hz, with a high sensitivity of 410.7 pm/g. In addition, it has a broad and flat response over low frequencies ranging from 1 to 10 Hz. The natural frequency and sensitivity of the accelerometer can be tuned by adding mass to tailor the sensor performance to specific applications. Experimental results are presented to demonstrate the good performance of the proposed FBG-based accelerometer. These results show that the proposed accelerometer is satisfactory for low frequency vibration measurements.The intelligent structural health monitoring method, which uses a fiber Bragg grating （FBG） sensor, is a new approach in the field of civil engineering. However, it lacks a reliable FBG-based accelerometer for taking structural low frequency vibration measurements. In this letter, a fiextensional FBG-based accelerometer is proposed and demonstrated. The experimental results indicate that the natural frequency of the developed accelerometer is 16.7 Hz, with a high sensitivity of 410.7 pm/g. In addition, it has a broad and flat response over low frequencies ranging from 1 to 10 Hz. The natural frequency and sensitivity of the accelerometer can be tuned by adding mass to tailor the sensor performance to specific applications. Experimental results are presented to demonstrate the good performance of the proposed FBG-based accelerometer. These results show that the proposed accelerometer is satisfactory for low frequency vibration measurements.

关 键 词：Accelerometers Civil engineering Frequency response Natural frequencies SENSORS Structural health monitoring Vibration measurement 

分 类 号：TN253[电子电信—物理电子学] TH824.4[机械工程—仪器科学与技术]