Fibre Optic Sensors for Shock Physics Measurements

由于高爆炸性材料固有的破坏性和快速释放的能量，诊断测量的过程是困难的，往往是中等精度。目前的方法通常是电气性质的，并且通常在几十年内保持不变。光纤方法的最新进展提出了新的工具，通过这些工具可以进行测量，并且在这一领域的创新有可能增加测量的保真度，这将有利于我们对爆炸物理学的大多数领域的理解和建模，以及在冲击到爆炸情景中反应性增长的基本过程。这个项目将着眼于利用光纤布拉格光栅（FBG）技术来确定物理参数的新技术。该项目将侧重于开发用于爆炸实验的聚合物光纤中的FBG，这是以前没有证明过的。这是在许多机构进行的工作的基础上进行的，包括南安普顿大学，该大学为此目的开发了石英玻璃纤维中的布拉格光栅。在聚合物光纤中开发光纤光栅将把应用扩展到惰性冲击物理学、冲击到爆炸实验以及观察到的速度低于爆炸速度的其他情况。

Due to the inherently destructive and rapid release of energy from highly explosive materials, diagnostic measurements of the process are difficult and often of modest accuracy. Current methods are usually electrical in nature and typically unchanged over many decades. Recent advances in fibre optic methods present new tools by which measurements may be made and innovation in this area has the potential to increase the fidelity of measurements which will benefit our understanding and modelling of most areas of detonation physics and the underlying processes in the reactive growth in shock to detonation scenarios. This project will look at novel techniques exploiting fibre Bragg grating (FBG) technology to determine physical parameters. The project will focus on developing FBGs in polymer optical fibre for use in detonation experiments which is something that has not previously been demonstrated. This follows on from work conducted at a number of institutions, including the University of Southampton, which developed Bragg gratings in silica glass fibres for this purpose. Developing FBGs in polymer optical fibre would extend the application to inert shock physics, shock to detonation experiments and other scenarios whereby the observed velocity would be lower than detonation speeds.