中文摘要：

超声相控阵检测技术具有可动态聚焦、检测复杂形状物体中的损伤、缺陷定位精准等优点。然而,现有的检测设备利用单芯片制作单通道后再扩展成多通道系统,集成度低、维护困难。文中基于FPGA技术,系统性地设计了延时算法、时序控制模块,采用ADI公司最新推出的含4通道基单元芯片AD9106构建大规模相控阵发射系统,设计配置高速发射/接收切换开关,从而实现多阵元的可控自发自收,大幅降低了系统中发射和接收硬件模块的复杂性和外形尺寸,同时抑制激发模块的高压发送脉冲。此相控阵发射系统具有集成度高、抗干扰能力强、精度高、功耗低、安全性强等优点。

英文摘要：

It is known that the UPA（Ultrasonic Phased Array） detecting technique has the advantages of dynamic focusing,detecting damages in objects with complex shapes,and precise defect locating. However,present detection equipments generally utilize the single chip to fabricate the single channel,and then expand it to multichannel system,leading to low integration level and difficult maintenance. Based on the FPGA technique,a time delay algorithm and sequential control module were designed systematically,and then a large-scale UPA transmission system easy to be extended to even more than 32 ~ 128 channels was constructed based on AD9106 which consists of4 channels in one chip and released by ADI company lately. Further,a high speed transmission /reception diverter switch was designed and configured,which can accomplish self transmit and self receive of multi array elements,and finally the complexity and size of transmission and reception hardware modules in this system was lowered tremendously,while the high pressure impulse of the transmission module was restrained. The UPA transmission system has the advantages of high integration,anti-jamming capability,detection accuracy,security as well as low power dissipation.