基于光纤布拉格光栅的浇注炸药固化温度监测

首次采用光纤Bragg光栅实时测量浇注炸药在固化成型过程中固化剂与粘结剂的反应放热量。为了实时、准确的测量出浇注炸药在固化过程中的温度值，设计了基于光纤布拉格光栅的组网式温度监测系统。鉴于炸药成分的危险性、以及浇注炸药固化过程时间长、对条件要求恒温的特殊性，直接的实时监测一直未找到合适的测量方法。近年来，光纤布拉格光栅由于其优越的特点，在通信和传感领域得到广泛应用。利用光纤光栅与温度之间的线性关系，将采集的光栅反射波长值换算为温度实时显示。通过波分复用技术在两根光纤上写入7个光栅点同时测量，多点分布式测量可以将炸药内部温度的分布趋势显示出来。封装的光栅传感器采用90°弯曲设计，不仅改进了传感器与跳线的连接，同时有利于装入烘箱内。Origin软件将txt数据绘制成曲线图形式，将固化过程温度的变化直观明了的显示出来。结果表明，该方法操作简单，精确度高，满足炸药固化过程中对温度的测试需求。

Monitoring of Curing Temperature of Pouring Explosive Based on Fiber Bragg Grating

For the first time, we real time measured released reaction heat between the binder and the curing agent in the curing process of cast explosive using fiber Bragg grating. In order to obtain the temperature in the process of pouring explosive casting real time and accurately, we designed the temperature monitoring system based on fiber Bragg grating. Given the risk of explosive component, long curing time and the requirements of constant temperature, a suitable measurement method for direct real-time monitoring has not been found. In recent years, due to its superior characteristics, fiber Bragg grating is widely used in the field of communication and sensing. We will make the collected reflection wavelength to convert real-time temperature displaying, utilizing linear relationship between fiber Bragg grating and temperature. Through WDM technology, seven grating points are written in two optical fibers to measure at the same time, and distribution trend of explosives internal temperature can be displayed in real time by multi-point distributed measurement. The curved design of the sensor not only improves the connection between sensor and jumper, but also benefits to place in oven. The txt data is made to draw a graph using origin software, and the changes in temperature in the curing process are displayed intuitively. The results show that this method is simple and high-precision, and meets the testing requirements of curing temperature of explosives.