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飞机引擎的性能和安全的关键是它的转动部件的完好性,对新的和运行的这种部件的检测,是美国通用电气飞机引擎公司(GEAE)及包括美国空军在内的用户必不可少的工作。例如引擎的压缩机叶片,在高温高压下容易产生裂纹,在运行期间,必须检测出大于0.045英时(0.114厘米)的裂纹和表面上有一定间隔的连续小孔隙。荧光渗透检测(FPI)是一种测量表面裂纹的常用方法,但是传统的FPI法,需要一个熟练的检测人员通过10倍的放大镜目视
The key to the performance and safety of an aircraft engine is the integrity of its rotating components. The testing of new and operational components is a must for GEAE and users, including the U.S. Air Force work. For example, engine compressor blades are prone to cracking under high temperature and pressure. During operation, cracks larger than 0.045 inch (0.114 cm) and continuous small pores on the surface must be detected. Fluorescent penetration testing (FPI) is a common method of measuring surface cracks, but the traditional FPI method requires a skilled inspector to view it through a 10x magnifier