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根据光纤布喇格光栅(FBG)耦合理论与单质点弹性绳振动原理研制出了一种FBG振动传感器。通过理论分析与试验验证得到FBG传感器的最佳配重尺寸(4.5mm×20mm)、最佳预拉伸量(0.8～1.2nm)与最佳的封装方式(石英玻璃管封装),得到传感器最佳的受温度影响最小的灵敏度参数。这种传感器响应速度快,灵敏度高。温度在-10～60℃的范围内,石英封装的FBG传感器灵敏度的误差小于0.1%。可以广泛地应用于军事基地、核场所、机场、仓库、监狱、建筑等场所的安防系统中。
A kind of FBG vibration sensor was developed based on the fiber Bragg grating (FBG) coupling theory and elemental elastic rope vibration principle. Through the theoretical analysis and experimental verification, the optimal weight of FBG sensor (4.5mm × 20mm), the best pre-tension (0.8 ~ 1.2nm) and the best packaging method (quartz glass tube package) The best temperature sensitivity of the smallest parameters of sensitivity. This sensor response speed, high sensitivity. The sensitivity of the FBG sensor in quartz package is less than 0.1% with a temperature in the range of -10 ~ 60 ℃. Can be widely used in military bases, nuclear establishments, airports, warehouses, prisons, construction and other places of the security system.