光纤线管是光纤制导**系统的重要组成部分,由于组成材料热膨胀系数之间的差异,精确缠绕样式的光纤线包性能会随温度变化而发生显著变化.为保证光纤线包结构稳定性及性能可靠性,需要对光纤线管各组成部分进行温度性能匹配研究.本文提出了一种基于双CCD 相机的热膨胀系数测量系统.该系统采用非接触方式双光路成像放大采样,通过图像处理得出被试样品在某温度变化区间内的轴向膨胀量.利用该系统完成对脱轴裸线包、碳纤维芯轴、聚四氟乙烯调节层以及成品光纤线管的热膨胀系数测试分析,测试结果与理论分析和实际使用情况一致,验证了此试验测试方法的正确性与可行性.

The fiber-optical coil is an important part of fiber-optic guidance weapon system.Due to the difference of the coefficient of thermal expansion(CTE) between the different composition materials,the performance of the accurate winding fiber- optic coil will be significant changed by the temperature.It is necessary to research the temperature matching performance of the fiber-optic coil,in order to ensure the structural stability and performance reliability.This paper presents a system to test the CTE by the double CCD camera,which is a non-contact test method.It uses the double light patch imaging amplification and sampling technology and gets the sample′s axial inflation volume in a temperature range by using the image processing method.In the paper,the test and analysis of the CTE of the off-spool fiber-optic coil,carbon fiber mandrel,polytetrafluoroethylene (PTFE) adjustment layer and the complete fiber-optic coil are finished by using the system.The results are the same in the theoretical analysis and the experiment,which proves that this test system is correct and feasible.