为了准确、 稳定、 全面地获得炸药熔铸过程各个位置的温度变化情况, 设计了基于布喇格光栅光谱频移的温度实时监测系统。 通过光纤组网系统对炸药熔铸过程炸药指定位置的多个点同时进行实时温度监测, 根据光栅的布喇格波长与光栅温度之间存在的线性关系, 建立光栅布喇格波长线性频移与光栅温度的函数, 获取炸药不同位置的准确温度。 四个通道通过耦合器共用同一个宽带光源, 每一根光纤上的5个光栅的布喇格波长相互分开。 实验所用的光栅为自己设计封装好的光栅, 用保偏熔接机将光栅与光纤熔接上, 经解调仪获取温度数据。 将获取的温度数据经Origin处理绘制时间―温度曲线。 结果显示, 布喇格光栅测得的温度能很好的满足实验要求。

In order to obtain the different position temperature changes in the process of explosive casting accurate, stability and comprehensive, we designed the temperature monitoring system based on fiber Bragg grating spectral shift. Through the fiber-optic network, the system can monitor the different point temperature of melt-cast explosive real-time. According to the function of linear frequency shift of fiber Bragg grating wavelength with the grating of temperature, we get the temperature of different positions. Four channels share a broadband light source with a coupler. The Bragg wavelengths of the 5 gratings of each fiber are separated from each other. Using the gratings designed, spliced and packaged by our own, we can obtain temperature data through the demodulator. The temperature data was processed by the Origin to draw diagram time-temperature curve. The results show that the measured temperature data of the fiber Bragg grating can meet the requirements of experiment.