共查询到20条相似文献,搜索用时 15 毫秒
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光纤光栅传感器的应用概况 总被引:138,自引:22,他引:138
就国外光纤光栅传感器在民用工程结构、航空航天业、船舶航运业、石油化工业、电力工业、核工业、医学等方面的应用作了简单的综述。 相似文献
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A novel and simple fiber grating sensor based on high-duty-cycle sample fiber Bragg grating is proposed and demonstrated experimentally,This type of sensor can measure strain and temperature simultaneously with merits of low cost,high sensitivity and immunity to electro-magneic interference.The sensor has an accuracy of 20μεand 0.8 ℃ over a strain range of 500-1500 με and a temperature range of 5-36℃ under experimental conditions. 相似文献
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光纤布拉格光栅(FBG)温度、应变的交叉敏感问题阻碍了其实用化技术的发展。针对FBG应变传感测量中的交叉敏感问题,系统综述了几种典型温度补偿的解决方案。介绍了其工作原理并简单分析了其特点,同时提出了一种改进型的双金属温度补偿封装结构。 相似文献
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光纤光栅应变传感测量中的温度补偿问题 总被引:9,自引:0,他引:9
从光纤Bragg光栅应变、温度交叉敏感的物理机制出发,在温度过程补偿和结果补偿的概念基础上分类综述了国内外关于交叉敏感问题的解决方案,介绍了各类方案的工作原理,同时提出了一种双金属补偿结构。 相似文献
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基于参考光栅的光纤光栅应变传感器温度补偿 总被引:6,自引:8,他引:6
为解决光纤布拉格光栅(FBG)应变测量时的应变、温度交叉敏感问题,利用FBG便于构成传感网络的优点,将温度补偿参考FBG与应变测量FBG串联在一路光纤上,根据2只FBG布拉格波长相对漂移获得被测结构应变。双FBG波长相对漂移对温度的灵敏度仅为0.12pm/℃,较好地实现FBG应变测量的温度补偿。参考FBG法原理简单,可操作性强,为FBG应变传感器的实际工程应用奠定了基础。 相似文献
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光纤光栅电磁量传感器的应用 总被引:2,自引:0,他引:2
详细介绍了光纤光栅电磁量传感器在测量电压、电流以及磁场中的应用,并探讨了在光纤光栅电磁量传感器应用中存在的问题以及解决办法。鉴于它对温度的敏感,给出了减弱或消除温度敏感的方法。综述了近几年国内外在该领域实现温度补偿的相关技术。 相似文献
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提出了一种基于钯涂层布喇格光栅光纤的氢浓度传感器方案。金属钯在氢环境中能够吸收一定量的氢并使其体积膨胀,而布喇格光栅光纤在应力的作用下其有效折射率和周期发生变化,导致中心波长偏移,两者结合可实现对外界环境中氢的测量。建立了外界环境氢浓度同钯涂层布喇格光纤光栅波长偏移之间的关系,通过数值分析给出光栅光纤氢浓度传感器在不同氢浓度以及温度环境中波长偏移量,并分析了其特点。 相似文献
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LIUYu-min YUZhong-yuan YANGHong-bo YANGBo-jun YULi ZHANGXiao-guang 《半导体光子学与技术》2004,10(4):225-227,232
The characteristics of special apodized fiber Bragg grating (FBG) in flat--top pass--band as reflectivity filter are presented. This special apodized FBG was designed by the particle swarm optimization algorithm. Compared with conventional apodized FBG, the special apodized FBG presented was more robust in the flat—top pass——band characteristic even if the strength of grating is very week. This technology is very interesting in designing the filter for wavelength division multiplexing system. 相似文献
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A transmission filter composed of a Sagnac loop and a fiber Bragg grating is studied in detail.It is found that the transmission spectrum of this filter is the splitting of the reflection spectrum of the fiber Bragg gratings.The filter can behave as a multiple-passband filter when the fiber Bragg grating is strong and as a single-band filter when the fiber Bragg grating is weak.Very narrow transmission filters can be obtained in this way. 相似文献
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ZHANGXiao-guang YULi YANGBo-jun LIUYu-min YUZhong-yuan 《半导体光子学与技术》2003,9(4):209-211,225
A novel tunable chirped fiber Bragg grating technology is proposed and simulated numerically by Matlab. If we adhere a uniform fiber grating with super magnetostrictive film and expose them in a non--uniform magnetic field, the period of the grating can be changed with the strain imposed on it by the magnetostrictive effect . The chirped characteristics can be tuned by changing the magnetic filed which is very flexible indesigning. 相似文献