Tarpara Eaglekumar G, Patankar V H
Homi Bhabha National Institute (HBNI), Mumbai 400094, India; Bhabha Atomic Research Centre (BARC), Mumbai 400085, India.
Homi Bhabha National Institute (HBNI), Mumbai 400094, India; Bhabha Atomic Research Centre (BARC), Mumbai 400085, India.
Ultrasonics. 2020 Jul;105:106106. doi: 10.1016/j.ultras.2020.106106. Epub 2020 Feb 3.
The paper proposed a novel hardware (FPGA) implementation of the coherent averaging architecture for the reconfigurable ultrasonic NDT system. The proposed hardware architecture uses the addressing based shifting technique for the addition operation and Radix-2 non-restoring algorithm for the division operation. Since the amount of hardware required by the proposed averaging scheme is independent of the number of averages, it supports on-the-fly control on the number of averages. Compared to conventional architecture, it provides 96% reduction in memory storage, 98% reduction in the number of adders, and 32% reduction in the processing time for the case of 64 coherent averages. For the experimentation, the ultrasonic imaging system designed and developed by the authors has been utilized. The developed system further supports dynamic on-line reconfiguration of the analog front-end hardware, real-time data acquisition, real-time hardware based data processing, and data transfer operations. The performance of implemented coherent averaging has been presented by various applications such as removal of RF random false-echoes, smoothing of A-scan waveforms and speckle removal of B-scan images.
本文提出了一种用于可重构超声无损检测系统的相干平均架构的新型硬件（FPGA）实现方案。所提出的硬件架构在加法运算中使用基于寻址的移位技术，在除法运算中使用基-2非恢复算法。由于所提出的平均方案所需的硬件量与平均次数无关，因此它支持对平均次数进行实时控制。与传统架构相比，在进行64次相干平均的情况下，它的内存存储减少了96%，加法器数量减少了98%，处理时间减少了32%。为了进行实验，使用了作者设计和开发的超声成像系统。所开发的系统进一步支持模拟前端硬件的动态在线重构、实时数据采集、基于硬件的实时数据处理以及数据传输操作。通过各种应用展示了所实现的相干平均的性能，如去除射频随机伪回波、平滑A扫描波形以及去除B扫描图像中的散斑。
