飞机结构腐蚀检测中的脉冲涡流无损检测技术

The Detection of Corrosion in Aeroplane Using Pulsded Eddy Current Nondestructive Testing Technology

对脉冲涡流无损检测技术的工作原理进行了分析,建立了脉冲涡流的检测系统对加工的模拟飞机多层结构的试件进行了测试,提取其时域瞬态感应信号的峰值和过零时间作为特征量,对出现在飞机多层结构第二层中的腐蚀缺陷进行了定量检测,试验结果和理论分析相一致,证明了脉冲涡流检测方法的有效性,由于其具有快速和定量化的优点,因而在飞机结构的腐蚀检测中具有广阔的应用前景.

The working principle of pulsed eddy current (PEC) nondestructive testing technology is analyzed, The PEC testing system was been established to examined the specimen of multi-layered aircraft structure, peak and zero-crossing time of the time domain transient response signal of PEC are extracted as the features to detect the corrosion in the second layer of aircraft structure quantificationally, the experiment results are consistent with that of the theory analysis, as the PEC have the advantages of fast speed and quantification, this makes the method have the broad using foreground in the testing of aircraft structure corrosion.