基于光纤Bragg光栅传感的轴向柱塞泵非介入式振动测量方法

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (20) : 196-202.

论文

何祯鑫1，张正义2，李洪才1，刘春桐1，冯永保1

作者信息 +

A non-intrusive vibration measurement method of an axial piston pump based on fiber Bragg grating sensing

HE Zhenxin1,ZHANG Zhengyi2,LI Hongcai1,LIU Chuntong1,FENG Yongbao1

Author information +

文章历史 +

摘要

振动信号是机械设备故障诊断的重要信息来源。为克服传统检测方法需对系统进行拆卸的问题，本文创新性地利用光纤光栅传感方法对液压泵进行非介入式振动测量，充分发挥光纤传感的抗电磁干扰能力强、耐腐蚀、稳定性好、测量敏感度高等优点。对光纤光栅振动传感原作了分析，设计、仿真分析了双等强度悬臂梁式光纤Bragg光栅（Fiber Bragg Grating，FBG）振动传感器，在此基础上利用光纤光栅解调系统和振动试验台对传感器的性能进行实验验证，得到该传感器灵敏度为0.0240 nm/(m•s-2)，固有频率为185Hz，并且线性度较好；对轴向柱塞泵模态分析，优化布置传感采样点，实际测量泵的振动信号。研究结果可为液压泵非介入式状态监测和故障诊断提供可靠数据支持。

Abstract

Vibration signal is an important source of information for mechanical equipment fault diagnosis.In order to overcome the system demolition problem of traditional detection methods, this paper innovatively uses the fiber grating sensing method to perform non-intrusive vibration measurement on the hydraulic pump, and fully utilizes the advantages of the optical fiber sensing with strong anti-electromagnetic interference, corrosion resistance, good stability, and high sensitivity measurement.The original fiber Bragg grating vibration sensor was analyzed, and a double equal strength cantilever beam fiber Bragg grating (FBG) vibration sensor was designed and simulated.Based on this, a fiber Bragg grating demodulation system and a vibration test table for the sensor were used.The performance was verified by experiments, and the sensitivity of the sensor was 0.024 nm/(m?s-2), the natural frequency was 185 Hz, and the linearity was good.The modal analysis of the axial piston pump was optimized to arrange the sensing sampling point.Actually the vibration signal of the pump was measured.The research results can provide reliable data support for non-intrusive condition monitoring and fault diagnosis of hydraulic pumps.

导出引用

何祯鑫1，张正义2，李洪才1，刘春桐1，冯永保1. 基于光纤Bragg光栅传感的轴向柱塞泵非介入式振动测量方法[J]. 振动与冲击, 2019, 38(20): 196-202

HE Zhenxin1,ZHANG Zhengyi2,LI Hongcai1,LIU Chuntong1,FENG Yongbao1. A non-intrusive vibration measurement method of an axial piston pump based on fiber Bragg grating sensing[J]. Journal of Vibration and Shock, 2019, 38(20): 196-202

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