基于温度减敏的光纤Bragg光栅应变传感器  

Temperature Insensitive Fiber Grating Sensor for Strain Detection

作　　者：李薇[1] 侯睿[1] 杨文俊 

机构地区：[1]中南民族大学计算机科学学院,湖北武汉430074 [2]湖北航天技术研究院总体设计所,湖北武汉430040

出　　处：《仪表技术与传感器》2013年第5期1-2,6,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(60841001);中央高校基本科研业务费专项基金(CZQ10009)

摘　　要：分析了光纤Bragg光栅(FBG)传感器的温度、应变交叉敏感机制,基于等强度梁的变形特点,提出了一种新型的90°楔形传感探头式双光纤光栅矩阵算法,既克服了传统矩阵算法的限制,又有效地消除了光纤Bragg光栅测量过程中温度对应变测量的影响,且由这种结构上的减敏措施,可以求出温度的变化。该方案简单易行,具有实际应用价值。改进封装工艺,可以使得测量数据更加精确。The principle of cross-sensitivity between strain and temperature of FBG sensors was analyzed. Based on the deformation features of equal strength beam, a novel twin-fiber Bragg grating matrix algorithm of 90°wedge sensing probe was presented. It can overcome the restriction of traditional matrix algorithm, and eliminate the temperature effect on strain detection effectively. With the hypo-sensitization measure on structure, the change of temperature can be detected. This scheme is easy to apply and has some practical values. Measured data can be more accurate by improving the packaging technology.

关 键 词：光纤BRAGG光栅 90°楔形传感探头 应变传感 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]