Structural health monitoring (SHM) technology is a monitoring process and early warning method for the health status or damage of special workpiece structures by deploying sensors. In recent years, there have been many studies on SHM, such as ultrasonic, pulsed eddy current, optical fiber, magnetic powder, and other nondestructive testing technologies. Due to their sensor deployment, testing environment, power supply, and transmission line wiring mechanism, they bring problems such as detection efficiency, long-term monitoring, and unreliable systems. The combination of wireless sensing technology and intelligent detection technology is used to solve the above problems. Therefore, this paper studies the tag antenna smart sensor, which is used to characterize the extension of metal defects in SHM. Then, it presents a wireless passive three-dimensional sensing antenna, and simulations verify the feasibility of the antenna. The simulation results show that the antenna can characterize the two extension directions of depth and width of the metal surface structure smooth defect. At the same time, the antenna can characterize the position of smooth defects on the surface of metal structures relative to the antenna and then realize the smooth defect positioning.

中文翻译：

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基于3D RFID标签天线的改进型金属表面缺陷检测传感器的研究

结构健康监测（SHM）技术是一种监视过程和预警方法，可通过部署传感器来监测特殊工件结构的健康状况或损坏。近年来，对SHM的研究很多，例如超声，脉冲涡流，光纤，磁粉和其他无损检测技术。由于它们的传感器部署，测试环境，电源和传输线布线机制，它们带来了诸如检测效率，长期监控和系统不可靠的问题。无线传感技术与智能检测技术的结合，解决了上述问题。因此，本文研究了标签天线智能传感器，该传感器用于表征SHM中金属缺陷的扩展。然后，它提出了一种无线无源三维传感天线，并通过仿真验证了该天线的可行性。仿真结果表明，该天线可以表征金属表面结构光滑缺陷的深度和宽度两个延伸方向。同时，天线可以表征金属结构表面上的光滑缺陷相对于天线的位置，从而实现光滑缺陷的定位。