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首页> 外文期刊>IEEE Transactions on Instrumentation and Measurement >Eddy Current Testing Probe Based on Double-Coil Excitation and GMR Sensor
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Eddy Current Testing Probe Based on Double-Coil Excitation and GMR Sensor

机译：基于双线圈励磁和GMR传感器的涡流探伤探头

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摘要

The development of eddy current nondestructive techniques and instruments is moving toward new challenges in detecting buried and smaller defects and minimizing the amplitude of excitation currents. The smaller the size of the detected defect, the greater is the diagnostic capability of these techniques. Moreover, the lower the excitation current required, the longer the battery discharge time of the portable instruments, the greater the possibility of implementing broadband excitation strategies with reliable results. This feature is also important when portable instruments with array of probes have to operate for a large amount of time. Following the actual trends based on the use of double-coil excitations, this paper proposes the investigation of the performance of these kinds of probes, when small and buried defects are involved, and low amplitudes of the excitation current are adopted. To allow these activities a suitable double-coil-based excitation probe has been assembled. The obtained performance has been also compared with a traditional single-coil excitation probe based on the same sensing element. The experimental analysis demonstrated the appreciable performance of the proposed solution in a number of test cases.
机译：涡流无损检测技术和仪器的发展正朝着新的挑战发展，即发现隐患和较小的缺陷并最小化激励电流的幅度。检测到的缺陷的尺寸越小，这些技术的诊断能力就越大。此外，所需的励磁电流越低，便携式仪器的电池放电时间越长，实施宽带励磁策略并获得可靠结果的可能性就越大。当带有探头阵列的便携式仪器必须长时间工作时，此功能也很重要。根据使用双线圈激励的实际趋势，本文提出了在涉及小缺陷和掩埋缺陷且采用低幅度激励电流的情况下对这类探头性能的研究。为了进行这些活动，已经组装了合适的基于双线圈的激励探头。还将获得的性能与基于相同传感元件的传统单线圈激励探头进行了比较。实验分析表明，在许多测试案例中，所提出的解决方案具有可观的性能。

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