Float-type fiber Bragg grating sensor for measuring the density of molten metal

Q4 Physics and Astronomy

光学技术 Pub Date : 2014-01-01 DOI:10.3788/GXJS20144003.0214

许俊飞 Xu Junfei, 肖锋 Xiao Feng, 赵振刚 Zhao Zhengang, 代云洪 Dai Yunhong, 胡明耀 Hu Mingyao, 李川 Li Chuan

引用次数: 0

Abstract

The quality and behavior of the molten metal can be defined by density,which is reflected the basic changes of the inter-atomic distance and coordination number of molten metal.A float-type fiber Bragg grating sensor is manufactured to measure the density of molten metal.The floater submerged in molten metal is controlled by buoyancy force. Through the driving rod,equal armed lever and connecting rod,pulling the equal strength cantilever beam,the deflection is changed.On the basis of detecting the wavelength shift of fiber Bragg grating which is pasted on the surface of cantilever beam the buoyancy values be obtained.The density of molten metal is detected.The theoretical sensitivity of the sensor is 0.115pm/(kg/m3).According to the four times experiment,the average density value of the molten metal is 7.574 ×103 kg/m3,which is less than the theoretical data for 7.621×103 kg/m3.The relative error is 0.62,the root mean square error is 117.371kg/m3.

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用于测量熔融金属密度的浮式光纤光栅传感器

熔融金属的质量和行为可以用密度来定义，密度反映了熔融金属原子间距离和配位数的基本变化。研制了一种浮式光纤光栅传感器，用于测量熔融金属的密度。浸没在熔融金属中的浮子受浮力控制。通过驱动杆、等臂杆和连杆，拉动等强度悬臂梁，改变挠度。在检测粘贴在悬臂梁表面的光纤布拉格光栅波长位移的基础上，得到了悬臂梁的浮力值。检测熔融金属的密度。传感器的理论灵敏度为0.115pm/(kg/m3)。四次实验结果表明，熔液的平均密度值为7.574 ×103 kg/m3，小于理论数据7.621×103 kg/m3。相对误差为0.62，均方根误差为117.371kg/m3。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

光学技术 Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

0.60

自引率

0.00%

发文量

6699

期刊介绍： The predecessor of Optical Technology was Optical Technology, which was founded in 1975. At that time, the Fifth Ministry of Machine Building entrusted the School of Optoelectronics of Beijing Institute of Technology to publish the journal, and it was officially approved by the State Administration of Press, Publication, Radio, Film and Television for external distribution. From 1975 to 1979, the magazine was named Optical Technology, a quarterly with 4 issues per year; from 1980 to the present, the magazine is named Optical Technology, a bimonthly with 6 issues per year, published on the 20th of odd months. The publication policy is: to serve the national economic construction, implement the development of the national economy, serve production and scientific research, and implement the publication policy of "letting a hundred flowers bloom and a hundred schools of thought contend".