边缘检测技术在火箭发动机实验诊断中的应用

EDGE DETECTION TECHNIQUE FOR EXPERIMENTAL DIAGNOSIS IN ROCKET MOTOR

关键词:  火箭发动机  燃烧性能  诊断（物理）  实时显示  图像处理  边缘识别

Key words:  Rocket engine  Combustion performance  Diagnosis(physics)  Real time display  Image processing  Edge recognition

摘要:

对高速运动分析仪拍摄的Ｕ型燃气发生器固体装药燃烧和双组元液体喷嘴雾化图像进行了边缘检测图像分析，根据被分析实物边缘层次性较强的特点，在简单边缘检测的基础上采用自动门限、二次门限和最佳滤波的方法，获得了固体燃气发生器在燃烧过程中的内部结构、推进剂瞬态燃速、绝热隔板烧蚀率等参数，获得了双组元液体喷嘴的雾化角、粒子分布等特性。

Abstract:

X ray real time radiography (RTR) technique was used to study solid propellant combustion in U type gas generator and double liquid elements nozzle spray flow field,and the RTR images were processed with edge detection technique As the tested objects are of distinct edge gradation,auto threshold technique and optimum filter methods were employed to improve image process effect in the simple edge detection technique With these methods the inner structure of chamber was viewed and the instantaneous combustion rate of solid propellant and ablation rate of insulated sheet were determined The spraying angle and the particles distribution of spray flow field can be obtained in the same way.