镍-玻璃纤维复合层超声特征成像检测

Ultrasonic Feature Imaging Testing of Ni/Fiberglass Composite Layers

对直升机旋翼前缘的镍-玻璃纤维复合层进行超声检测方法研究。分析镍-玻璃纤维复合层缺陷特征及缺陷识别方法;针对薄壁曲面构件的检测需求,采用便携式超声特征扫描成像方法和接触式聚焦方法,完成曲面旋翼前缘的扫描成像检测;利用超声特征扫描成像系统对检测信号进行全波列采集,并用幅值特征和频谱分析等方法对复合层脱粘缺陷进行分析和处理,实现高精度的缺陷显示和评价。

The ultrasonic testing method of nickel-fiberglass composite layers on the leading edge of helicopter blades was studied.The defect characteristic and defect recognition method of cladding layer of nickel-fiberglass were analyzed.For the detection requirement of thin-walled curved components,scan imaging tests for the leading edge of curved blades were accomplished by adopting the portable ultrasonic feature scan imaging method and the contact focus method.High-accuracy display and evaluation of defects was achieved by utilizing ultrasonic feature scan imaging system for the full wave column acquisition of detection signal,as well as analyzing and processing the composite layer debonding defect with the modes（e.g.amplitude characteristic and frequency analysis）.