基于光纤阵列的气流传感方法研究
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摘要
提出了一种基于光纤光栅阵列的光纤气流传感器。单模光纤光栅的栅区长度为10 mm,将三根光纤光栅均匀环绕布设于硅胶基体。传感器外界环境温度以及气流流速的改变都会引起传感器反射谱的变化。通过监测反射谱可以实现对外界物理量的测量。实验分析可知,硅胶基体与光纤光栅有着很好的耦合效果,通过改变硅胶基体的长度使得传感器的传感特性得到有效改善。实验研究结果表明,在正常室温情况下,传感器的中心波长漂移量与流速成二次函数关系且传感器具有方向传感特性。本文提出的光纤阵列气流传感器结构紧凑、制作工艺简单、可靠性高。
A fiber optic airflow sensor based on fiber grating array is proposed.The length of the gate region of the single-mode fiber grating is 10 mm,and the three fiber gratings are evenly distributed around the silica gel substrate.The changes of the ambient temperature and flow velocity can cause changes in the reflectance spectrum of the sensor.By monitoring the reflectance spectrum,the physical quantity of the outside can be measured.Experimental analysis shows that the silica gel matrix has a good coupling effect with the fiber grating.By changing the length of the silica matrix,the sensing characteristics of the sensor are effectively improved.The experimental results show that under normal room temperature conditions,the sensor′s central wavelength drift is quadratic with the flow velocity and the sensor has directional sensing characteristics.The fiber array airflow sensor proposed in this paper is compact in structure,simple in manufacturing process and with high reliability.
A fiber optic airflow sensor based on fiber grating array is proposed.The length of the gate region of the single-mode fiber grating is 10 mm,and the three fiber gratings are evenly distributed around the silica gel substrate.The changes of the ambient temperature and flow velocity can cause changes in the reflectance spectrum of the sensor.By monitoring the reflectance spectrum,the physical quantity of the outside can be measured.Experimental analysis shows that the silica gel matrix has a good coupling effect with the fiber grating.By changing the length of the silica matrix,the sensing characteristics of the sensor are effectively improved.The experimental results show that under normal room temperature conditions,the sensor′s central wavelength drift is quadratic with the flow velocity and the sensor has directional sensing characteristics.The fiber array airflow sensor proposed in this paper is compact in structure,simple in manufacturing process and with high reliability.
引文
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[2] WANG Yanfei,ZHOU Xiangguang,ZHANG Lixin.Research on rotator of the micro small flow sensor[J].Metrology & Measurement Technique,2007,34(5):22-24.(in Chinese)王燕飞,邹向光,张莉新.转子微小流量传感器的研制[J].计量与测试技术,2007,34(5):22-24.
[3] LI Ming,LIANG Qi.Error analysis of electromagnetic flowmeter meter factor[J].Metrology & Measurement Technique,2016,43(7):104-105.(in Chinese)李铭,梁琦.电磁流量计仪表系数的误差分析[J].计量与测试技术,2016,43(7):104-105.
[4] GAO Zhengzhong,ZHANG Xiaoyan,GONG Qunying,et al.Design of ultrasonic flowmeter based on BP neural network[J].Modern Electronics Technique,2016,39(16):6-9.(in Chinese)高正中,张晓燕,龚群英,等.基于BP神经网络的超声波流量计的设计[J].现代电子技术,2016,39(16):6-9.
[5] TU Xiaoli,YANG Daoye,CHEN Jing.Design of Ultrasonic Doppler flowmeter[J].Instrument Technique and Sensor,2016,(3):41-43.(in Chinese)涂晓立,杨道业,陈静.超声波多普勒流量计的设计[J].仪表技术与传感器,2016,(3):41-43.
[6] YING Qianwen,ZHANG Lingfen,TAO Wei-dong,et al.A fiber bragg grating flow meter based on stress change[J].Laser Journal,2017,38(4):10-12.(in Chinese)应倩雯,张玲芬,陶卫东,等.一种基于应力敏感的光纤布拉格光栅流量计[J].激光杂志,2017,38(4):10-12.
[7] LIU Mingyao,LU Yifan,ZHANG Zhijian,et al.FBG pressure sensor based on polymer packaging[J].Chinese Journal of Scientific Instrument,2016,37(10):2392-2398.(in Chinese)刘明尧,卢一帆,张志建,等.基于聚合物封装的光纤布拉格光栅压传感器[J].仪器仪表学报,2016,37(10):2392-2398.
[8] ZHANG Xuezhi,ZHU Lianqing,ZHANG Yinming,et al.Fiber bragg grating with nonmetal and corrosion resisting packaging and its temperature characteristic[J].Laser & Infrared,2015,45(4):437-441.(in Chinese)张学智,祝连庆,张荫民,等.光纤光栅非金属耐腐蚀封装及其温度特性研究[J].激光与红外,2015,45(4):437-441.
[9] CHEN Hao,YAN Guang,ZHUANG Wei,et al.Research on preload package and sensing characteristics of fiber Bragg grating strain sensor[J].Laser & Infrared,2016,46(9):1128-1132.(in Chinese)陈昊,闫光,庄炜,等.光纤光栅应变传感器预紧封装及传感特性研究[J].激光与红外,2016,46(9):1128-1132.
[10] LOU Xiaoping,CHEN Zhongqing,ZHUANG Wei,et al.Error analysis and calibration for FBG shape reconstruction based on non-orthogonal curvatures[J].Chinese Journal of Scientific Instrument,2017,38(2):386-393.(in Chinese)娄小平,陈仲卿,庄炜,等.非正交FBG柔杆空间形状重构误差分析及标定[J].仪器仪表学报,2017,38(2):386-393.
[11] Huang Y,Jiang Q,Li Y,et al.Research and design of a novel,low-cost and flexible tactile sensor array[J].Measurement,2016,94:780-786.
[12] Fujiwara E,Wu Y T,Schenkel E A,et al.Development of a tactile sensor based on optical fiber specklegram analysis and sensor data fusion technique[J].Sensors and Actuators A Physical,2017.
[13] Jiang Q,Xiang L.Design and Experimental Research on small-structures of tactile sensor array unit based on fiber bragg grating[J].IEEE Sensors Journal,2017,(7):2048-2054.
[14] Zhang J,Xia G,Xie Y,et al.A new method for the analysis of cascaded fiber bragg gratings applied to tactile sensors[C]//International Conference on Robots & Intelligent System.IEEE,2016:30-33.
[15] Ahmad T Abdulsadda,Xiaobo Tan.An artificial lateral line system using IPMC sensor arrays[J].International Journal of Smart and Nano Materials,2012,3(3):226-242.
[16] Tao J,Yu X.Hair flow sensors:from bio-inspiration to bio-mimicking-a review[J].Smart Materials and Structures,2012,21(11):113001.
[17] R L Hadimani,D Vatansever Bayramol,N Sion,et a1.Continuous production of piezoelectric PVDF fiber for e-textile application[J].Smart Materials and Structures,2013,22(7):075017.
[18] Yixiang Bian,Rongrong Liu,Xiaomei Huang,et a1.Design and fabrication of a metal core PVDF fiber for an air flow sensor[J].Smart Materials and Structure,2015,24(10):105001.