摘要
以往使用放电探头法和超声法容易受到环境影响,航空发动机叶片叶型尺寸检测不精准,检测耗时较长;为了解决该问题,提出了基于线激光扫描的航空发动机叶片非接触式检测研究;根据航空发动机结构;使用线激光扫描装置,结合CCD相机、分辨率为768×576 pix图像采集卡、23步进伺服马达,对三维空间位置信息的检测,实现坐标系统在X方向上转换;确定光条位置后,构建线激光扫描检测数学模型,确定像坐标系高度值与真实空间高度值之间转换关系,完成叶片叶型尺寸扫描;设计非接触式检测流程,避免受到环境干扰,通过光强峰值反映叶片叶型尺寸;在四坐标检测仪支持下,进行实验验证分析,由实验结果可知,该方法检测到的航空发动机叶片叶型尺寸误差在-0.008~+0.009 mm之间,在允许误差±0.01 m范围内,检测结果精准且检测效率高,能够为航空稳定运行提供技术支持。
In the past,the discharge probe method and ultrasonic method were easily affected by the environment,and the aero-engine blade profile size detection was not accurate,and the detection took a long time.In order to solve this problem,a research on non-contact detection of aero-engine blades based on line laser scanning is proposed.According to the aero engine structure.using a line laser scanning device,combined with a CCD camera,a resolution of 768×576 pix image acquisition card,and 23 stepping servo motors,the detection of three-dimensional spatial position information can realize the conversion of the coordinate system in the X direction.After determining the position of the light bar,construct a mathematical model of line laser scanning detection,determine the conversion relationship between the height value of the image coordinate system and the real space height value,and complete the blade shape size scan.Design a non-contact detection process to avoid environmental interference,and reflect the blade shape size through the peak light intensity.With the support of the four-coordinate detector,the experimental verification and analysis are carried out.From the experimental results,it can be known that the size error of the aeroengine blade profile detected by this method is between-0.008 mm~+0.009 mm,and the allowable error is within the range of±0.01m.The detection results are accurate and the detection efficiency is high,which can provide technical support for the stable operation of aviation.
作者
龙智
郑琪
张天辉
方建军
马迎春
LONG Zhi;ZHENG Qi;ZHANG Tianhui;FANG Jianjun;MA Yingchun(AECC South Industry Co.,Ltd,Zhuzhou 412002,China;Shanxi Teamwork Photoelectric Industries Co.,Ltd,Taiyuan 030000,China)
出处
《计算机测量与控制》
2021年第9期50-53,60,共5页
Computer Measurement &Control
关键词
线激光扫描
航空发动机
叶片
非接触式检测
放电探头法
超声法
line laser scanning
aeroengine
blade
non-contact detection
discharge probe method
ultrasonic method
