论文标题
使用涡流对钢加固棒腐蚀程度的相敏感检测
Phase sensitive detection of extent of corrosion in steel reinforcing bars using eddy currents
论文作者
论文摘要
在钢筋水泥混凝土（RCC）结构中腐蚀的腐蚀会导致过早恶化和生命周期维持成本的增加。初期腐蚀的非破坏性测试（NDT）一直是该域中的一项即将来临的任务。我们使用各向异性磁盘（AMR）传感器基于涡流检测来提出一个低成本传感平台，以测量钢加固杆（Rebars）中腐蚀的程度。该方案采用相位敏感的检测，其中相对于参考刺激的传感器输出（与钢筋的表面电导率成正比）的相移是通过锁定放大器测量的，并用于区分腐蚀和非腐蚀的钢筋。概念验证传感器演示能够解决钢筋腐蚀的不同范围，并可以在各种行业中找到潜在的应用程序作为NDT工具。
Corrosion of steel bars in reinforced cement concrete (RCC) structures leads to premature deterioration and increase in life cycle maintenance costs. Non-destructive testing (NDT) of incipient corrosion has been an impending task in this domain. We present a low cost sensing platform based on eddy current detection using anisotropic magnetoresistive (AMR) sensor to measure the extent of corrosion in steel reinforcing bars (rebars). The scheme employs phase-sensitive detection, wherein the phase shift in the sensor output (proportional to surface conductivity of the rebar) relative to the reference stimulus is measured by a lock-in amplifier and used to distinguish corroded and non-corroded rebars. The proof-of-concept sensor demonstration is able to resolve varying extents of rebar corrosion and can find potential applications as an NDT tool in a variety of industries.
