中文摘要：

针对飞机发动机涡轮叶片缺陷检测难度大、效率低、严重制约航空装备保障的问题,设计一套基于ARM和FPGA的双核电磁无损检测系统。该系统采用FPGA结合A/D采样芯片完成64通道数据采集,并以基于android系统的ARM实现对各功能单元的控制。FPGA控制A/D采样芯片完成传感器阵列的高速数据采集并对其进行预处理,经UART接口送给ARM后,再由ARM完成信号特征提取和缺陷检测,并实现三维实时成像。测试结果表明：该系统对微裂纹的长度检测误差〈0.2 mm,成像速率达10帧/s,满足工业应用需求。

英文摘要：

A double-core electromagnetic nondestructive testing system was designed to check the turbine blades of aircraft engines in an easier and more efficient way. Specifically, FPGA with an A/D sampling chip was used to complete 64-channel data acquisition and ARM with an android operating system was chosen to control each function unit. First, the chip was driven by the FPGA to acquire data at a high speed and then have them pre-treated. Second, after the data was further sent to the ARM through an UART interface, signal features were extracted and defects inspected with the ARM. Eventually, a 3D real-time image was formed. The Test results have shown that, the system, with an error rate less than 0.2 mm and an imaging rate as fast as 10 frames/s when used to measure the length of micro cracks, can meet the application requirements in some industries.