PERCRO-CEIICP, Scuola Superiore Sant'Anna, Polo Sant'Anna Valdera, viale R. Piaggio, 34-56025 Pontedera (Pisa), Italy.
ISA Trans. 2012 Jan;51(1):181-8. doi: 10.1016/j.isatra.2011.07.004. Epub 2011 Aug 19.
Non destructive test systems are increasingly applied in the industrial context for their strong potentialities in improving and standardizing quality control. Especially in the intermediate manufacturing stages, early detection of defects on semi-finished products allow their direction towards later production processes according to their quality, with consequent considerable savings in time, energy, materials and work. However, the raw data coming from non destructive test systems are not always immediately suitable for sophisticated defect detection algorithms, due to noise and disturbances which are unavoidable, especially in harsh operating conditions, such as the ones which are typical of the steelmaking cycle. The paper describes some pre-processing operations which are required in order to exploit the data coming from a non destructive test system. Such a system is based on the joint exploitation of Laser and Electro-Magnetic Acoustic Transducer technologies and is applied to the detection of surface and sub-surface cracks in cold and hot steel slabs.
非破坏性测试系统因其在提高和标准化质量控制方面的强大潜力，在工业领域得到了越来越广泛的应用。特别是在中间制造阶段，对半成品上缺陷的早期检测可以根据其质量将其引导到后续的生产过程中，从而在时间、能源、材料和工作方面节省大量成本。然而，非破坏性测试系统产生的原始数据并不总是立即适用于复杂的缺陷检测算法，因为噪声和干扰是不可避免的，尤其是在苛刻的操作条件下，例如炼钢周期中典型的条件。本文介绍了一些预处理操作，这些操作是为了利用非破坏性测试系统产生的数据而需要进行的。该系统基于激光和电磁声换能器技术的联合开发，并应用于检测冷、热轧钢板的表面和亚表面裂纹。
