A two-dimensional cantilever vibration sensor based on Fiber Bragg Grating (FBG) is proposed. The proposed sensor consists of a section of optical fiber with double FBGs and three different beams. After theoretical analysis and experimental verification, the proposed sensor has a high sensitivity response. The experimental result shows that the natural frequency of the sensor in the x/y direction of vibrations is respectively 505/177 Hz. The flat frequency of the sensor is 60–150 Hz and 30–150 Hz, respectively. And the sensor’s sensitivity is respectively 125.85/82.32 pm/g in the x/y direction of vibration. Compared with the traditional cantilever beam FBG sensor, the proposed sensor has the advantages of multi-directional detection, avoiding chirp and so on. Therefore, it has great application prospects in two-dimensional vibration signal detection of bridges, roads and buildings.

提出了一种基于光纤布拉格光栅（FBG）的二维悬臂振动传感器。所提出的传感器由一段具有双FBG和三个不同光束的光纤组成。经过理论分析和实验验证，该传感器具有较高的灵敏度响应。实验结果表明，传感器在振动的x / y方向上的固有频率分别为505/177 Hz。传感器的固定频率分别为60–150 Hz和30–150 Hz。传感器在x / y振动方向上的灵敏度分别为125.85 / 82.32 pm / g。与传统的悬臂梁FBG传感器相比，该传感器具有多方向检测，避免avoid声等优点。因此，