Abstract A single optical fibre sensor is used to measure the dynamics of an impact. The method consists of sewing the optical fibre onto a woven Kevlar layer and placing it between the shoot pack and backing material. The measurement is accomplished by using the friction between the layer and the optical fibre to relate the optical fibre strain to impact deformation. Tests are done using a backing material of Roma Plastilina No.1 clay, and transparent ballistics gel with independent high-speed imaging. A final calculated BFD average error of 7.75% is presented as well as a timing error of 15.5% between the imaged dynamic BFD and the dynamic BFD determined by the FBG. This method is also tested at the U.S. Army Aberdeen Test Center in Maryland with a final calculated error of 7%.

中文翻译：

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使用单根光纤进行动态背面变形测量

摘要 单光纤传感器用于测量冲击动力学。该方法包括将光纤缝合到编织的 Kevlar 层上，并将其放置在拍摄包和背衬材料之间。测量是通过利用层与光纤之间的摩擦力将光纤应变与冲击变形联系起来来完成的。测试是使用 Roma Plastilina No.1 粘土和具有独立高速成像的透明弹道凝胶的背衬材料完成的。最终计算出的 BFD 平均误差为 7.75%，成像的动态 BFD 和由 FBG 确定的动态 BFD 之间的时序误差为 15.5%。这种方法也在马里兰州的美国陆军阿伯丁测试中心进行了测试，最终计算误差为 7%。