探讨了光纤布拉格光栅(FBG)传感技术在公路交通流量检测监视系统中的应用和FBG应力传感中温度交叉敏感的问题.首先从理论上分析了光纤光栅传感器的结构和原理，然后通过实验研究并搭建实验系统，经反复测试最终取得了理想的实验结果.利用不同车型的数次过车实验，证明该识别系统识别准确率达100%，且该系统不怕潮湿、粉尘、抗电磁干扰，有望替代现有的电类产品，在工程实践中获得广泛应用.

The application of fiber Bragg grating(FBG) sensing technology in traffic detection system and the problem of the temperature cross sensitivity in FBG strain sensing were discussed. The structure and principle of the FBG sensor were theoretically analyzed, and the experiment system was constructed through making experiment investigation, the ideal experiment results were ultimately obtained after many tests. Several experiments on different types of vehicles proved that the accuracy rate of the identification system could be arrived at 100%, which is perfectly matched with the principle. This system has the merit of resistance to damp and dust, anti-electromagnetic interference, and it is hopeful for replacing the existent electric products. The system has been widely applied in practical engineering.