Small-diameter tubes that are widely used in petroleum industries and power plants experience corrosion during long-term services. In this paper, a compact inserted guided-wave EMAT with a pulsed electromagnet is proposed for small-diameter tube inspection. The proposed transducer is noncontact, compact with high signal-to-noise ratio and unattractive to ferromagnetic tubes The proposed EMAT is designed with coils-only configuration, which consists of a pulsed electromagnet and a meander pulser/receiver coil. Both the numerical simulation and experimental results validate its feasibility on generating and receiving L(0,2) mode guided wave. The parameters for driving the proposed EMAT are optimized by performance testing. Finally, feasibility on quantification evaluation for corrosion defects was verified by experiments.

中文翻译：

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带有电磁脉冲的紧凑型导波EMAT用于铁磁管检查

广泛用于石油工业和发电厂的小直径管在长期服务期间会遭受腐蚀。在本文中，提出了一种紧凑的带有脉冲电磁体的插入式导波EMAT，用于小直径管检查。拟议的换能器是非接触式的，紧凑的，具有高的信噪比，并且对铁磁管没有吸引力。拟议的EMAT设计为仅线圈配置，由脉冲电磁体和曲折脉冲发生器/接收器线圈组成。数值模拟和实验结果均验证了其在产生和接收L（0,2）模式导波方面的可行性。通过性能测试优化了用于驱动建议的EMAT的参数。最后，通过实验验证了定量评价腐蚀缺陷的可行性。