加速度计
灵敏度(控制系统)
声学
流量(数学)
环境科学
海洋工程
地质学
材料科学
工程类
计算机科学
电子工程
机械
物理
操作系统
作者
Shaodong Jiang,Yingying Wang,Faxiang Zhang,Zheng Sun,Chang Wang
标识
DOI:10.1016/j.yofte.2022.103128
摘要
• Designing two fiber supports improve traditional cantilever FBG accelerometers. • Establishing accuracy mechanical model uses elasticity theory approach. • Accelerometer with high figure of merit, low cross-sensitivity, small size. • Accelerometers apply in downhole non-invasive flow measurement. In this study, a cantilever beam-based fibre Bragg grating (FBG) accelerometer is presented. Two fibre supports are arranged at both ends of a cantilever beam; therefore, the FBG can be stretched longitudinally by both displacement and rotation of the free end. The principle of this sensor is analysed by the elasticity theory approach and the accuracy of the theoretical model is verified by the ANSYS modal simulation. Furthermore, the influence of key structural parameters on the sensor characteristics is analysed by Mathematica for structural optimisation. Hence, the accelerometer exhibits a resonant frequency of approximately 76 Hz, an average sensitivity of 59.3 dB re pm/g for a 1–60 Hz flat response interval and a cross-sensitivity of less than –24.43 dB (<6.1 %), which is capable of low frequency and precision vibration measurements. Finally, a flow-monitoring test is presented and the results show that it is feasible to use FBG accelerometers for flow monitoring in oil wells.
科研通智能强力驱动
Strongly Powered by AbleSci AI