研究了一种光纤布拉格光栅顶板离层传感器，其具有结构简单、安装方便、成本较低等优点。光纤传感器自身不带电，适合应用在煤矿生产环境，传感器内部由机械结构组成，通过机械联动实现了传感器测量位移的转换，便于采用钢丝绳与顶板固定，同时也为实际应用中改变量程和灵敏度提供了便利。传感器使用了3个光栅，其多光栅的设计满足了对多点实时监测的需求，也提供了一种温度补偿的方法，在多个温度下的实验结果验证了该传感器具有可靠的线性系数，精度可以在±2 mm之内，量程可达300 mm。

This study investigates a roof separation sensor based on fiber Bragg grating. Simple structure, easy installation, and low cost are the advantages of this fiber optic sensor. This sensor does not exhibit charged characteristics, and it is suitable for coal mine applications. The sensor consists of mechanical structures and shifts the displacement of a wire rope through the rotation of multiple mechanical structures. Thus, it is convenient to use the wire rope to connect to the roof separation and vary the range and sensitivity. The sensor has three fiber gratings, which not only satisfies the requirements for monitoring multiple points but also provides a method for eliminating the temperature effects. The experimental results verify the reliable linearity of the sensor at multiple temperatures, and the accuracy can reach ±2 mm with a range of up to 300 mm.