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Rapid distributed data collection with arrays - the next step beyond full waveform capture

机译:使用阵列进行快速分布式数据收集-超越完整波形捕获的下一步

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Ultrasonic C-scanning is widely used for large-area flaw detection but acquiring the full RF waveform for each surface point - Full Waveform Capture (FWC) - offers many advantages. A system that used phased arrays to achieve this without loss of area coverage rate has been reported. FWC allows many signal processing operations, previously only possible at acquisition, to be performed off-line. Multiple or time-consuming algorithms can be performed on the same data set without compromising inspection speed but some, such as steering and focusing, must still be performed at acquisition. Although ultrasonic arrays are now widely accepted in imaging systems, their full capability will only be realised when viewed as distributed data collection devices. The modular array hardware of DSL's 'Flawlnspecta' can now achieve this at real-time rates, significantly extending the post-processing operations that can be performed. These include steering and focusing adjustments, data-dependent adaptive focusing, and multi-array data collection and processing. A flexible data formatting has been devised to provide an interface for end-users to develop customised algorithms. The paper reports on the distributed data acquisition architecture and the data storage format. Specific postprocessing operations are covered elsewhere but some typical options will be outlined.
机译:超声波C扫描广泛用于大面积探伤,但获取每个表面点的完整RF波形-全波形捕获(FWC)具有许多优势。已经报道了使用相控阵列来实现这一目标而又不损失面积覆盖率的系统。 FWC允许离线执行许多以前只能在采集时进行的信号处理操作。可以在同一数据集上执行多种算法或耗时的算法,而不会影响检查速度,但是在采集时仍必须执行某些算法,例如操纵和聚焦。尽管超声阵列现在已在成像系统中被广泛接受,但只有当将其视为分布式数据收集设备时才能实现其全部功能。 DSL的“ FlawInspecta”的模块化阵列硬件现在可以实时实现此目的,从而大大扩展了可以执行的后处理操作。其中包括操纵和聚焦调整,依赖于数据的自适应聚焦以及多数组数据收集和处理。已经设计了一种灵活的数据格式,以提供一个接口供最终用户开发定制的算法。该论文报告了分布式数据采集架构和数据存储格式。具体的后处理操作将在其他地方介绍,但将概述一些典型的选项。

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