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双孔平行梁光纤Bragg光栅称重传感器
引用本文:王昱,李川,胡玉瑞,李丹,荣宁,张晨,罗忠富.双孔平行梁光纤Bragg光栅称重传感器[J].光学技术,2008,34(5).
作者姓名:王昱  李川  胡玉瑞  李丹  荣宁  张晨  罗忠富
基金项目:云南省学术与技术带头人培养项目,昆明理工大学教学与科研带头人培养项目,光电信息技术科学教育部重点实验室(南开大学、天津大学)开放课题
摘    要:采用双孔平行梁型弹性元件作为光纤Bragg光栅称重传感器的换能结构,其中,四片光栅对称地贴粘在梁的灵敏区域。值得注意的是利用弹性元件自身结构特点对称重传感器进行了温度和偏载补偿,从而得到了FBG中心波长移位与载荷的关系。加载卸载实验表明,该双孔平行梁FBG称重传感器的载荷响应灵敏度为16 pm/kg,测量精度为0.7%。

关 键 词:光纤光栅  称重传感器  Bragg波长  温度  载荷

Fiber Bragg grating weighting sensor based on double holed cantilever beam
WANG Yu,LI Chuan,HU Yu-rui,LI Dan,ZHANG Chen,RONG Ning,LUO Zhong-fu.Fiber Bragg grating weighting sensor based on double holed cantilever beam[J].Optical Technique,2008,34(5).
Authors:WANG Yu  LI Chuan  HU Yu-rui  LI Dan  ZHANG Chen  RONG Ning  LUO Zhong-fu
Abstract:Weighting sensor with Fiber Bragg Gratings(FBG's) as transducer and a double holed cantilever beam as elastic component is designed.Four FBG's are sticked to the most sensitive area of the beam symmetrically.An explicit linier relationship between the compound shifts of center Bragg wavelengths of the gratings and the weight of the load,independent of the circumstance temperature and position of the load,is given and verified by experiments.The experimental results also show that the response sensitivity of the sensor is 16 pm/kg,and the accuracy is 0.7%.
Keywords:fiber Bragg grating  weighing sensor  Bragg wavelength  temperature  load
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