摘要
在对汽轮机振动进行测量时,由于传统测量方法中传感头不便安装、且信号易受电磁干扰,很难对微小位移进行高精度测量,光纤位移传感器具有体积小、不受电磁环境干扰等特点,通过光电转换、信号调理放大实现对汽轮机振动信号的在线测量,结合LabVIEW软件对噪声信号进行曲线拟合并结合快速傅里叶变换进行幅频特性处理,获得高精度的微位移测量结果。整个测量系统具有抗干扰、测量速度快、数据实时记录等优势,能实现在线测量微位移功能,经实验验证,振动测量范围1～500μm、精度±0.5%,动态范围<1 kHz,可以满足汽轮机振动测试需要。
When measuring turbine vibration, it is difficult to accurately measure small displacement because the sensor head is inconvenient to install and the signal is vulnerable to electromagnetic interference in traditional measurement methods. Optical fiber displacement sensor has the characteristics of small volume and being not affected by electromagnetic environment. Through the photoelectric conversion and signal conditioning amplifier it realizes online measurement of steam turbine vibration signals, Combined with LabVIEW software to do curves fitting of noise signal and to do with amplitude frequency characteristics with FFT processing, it eventually obtains high precision micro displacement measurement results. The measurement system has the advantages such as anti-interference, fast measuring speed, real-time recording of data, and it can realize the function of online measurement of micro displacement, the experiment suggests the vibration measurement range of 1~500 μm, accuracy of 0.5%, and dynamic range <1 kHz, which can meet the needs of the steam turbine vibration test.
作者
陈向华
杨萍
杨海马
赵凯
袁宝龙
李筠
刘瑾
严瑾
Chen Xianghua;Yang Ping;Yang Haima;Zhao Kai;Yuan Baolong;Li Jun;Liu Jin;Yan Jin(School of Optical-Electrical and computer Engineering, University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Spaceflight Manufacture (Group) Co., Ltd.,Shanghai 200245,China;Shanghai Huaike Intelligent Technology Co.,Ltd.,Shanghai 201900,China)
出处
《电子测量技术》
2019年第1期91-94,共4页
Electronic Measurement Technology
基金
上海航天创新基金(SAST2017-062)
宝山区科技创新专项基金(17-C-21)
上海市自然科学基金(17ZR1443500)项目资助
关键词
光纤测振
微位移测量
快速傅里叶变换
LABVIEW
fiber optic vibration
micro-displacement measurement
fast Fourier transformation
LabVIEW
