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A metal structure health detection method based on uhf passive rfid

A metal structure and health detection technology, applied in the direction of collaborative operation of devices, instruments, design optimization/simulation, etc., can solve problems such as inability to detect metal features, and achieve a comprehensive effect.

Active Publication Date: 2022-03-25
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above deficiencies in the prior art, the invention provides a metal structure health detection method based on UHF passive RFID, which solves the problem that traditional tags cannot detect metal features

Method used

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  • A metal structure health detection method based on uhf passive rfid
  • A metal structure health detection method based on uhf passive rfid
  • A metal structure health detection method based on uhf passive rfid

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Embodiment

[0047] like figure 1 As shown, the present invention provides a metal structure health detection method based on UHF passive RFID, and its specific implementation block diagram is as follows figure 2 shown. According to the present invention, defects (cracks) appear on the metal surface in the exposed environment or under huge pressure, which indirectly causes the impedance of the antenna arm to change. According to this characteristic change, the RFID technology can be used to realize real-time detection of the health of the metal structure. The specific implementation steps are as follows:

[0048] S1. Build a 3D model to bend the patch dipole sensor tag, such as image 3 As shown, the sensing tag in step S1 includes a 16mm thick FR4 substrate, an antenna arm attached to the surface of the FR4 substrate, and a radio frequency chip connected to the antenna arm.

[0049] In this embodiment, for the design of the 3D model miniaturized bent patch dipole sensor tag in step S1...

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Abstract

The invention provides a metal structure health detection method based on UHF passive RFID: constructing a 3D model bending patch dipole sensor tag; determining the relationship between the defect on the metal structure surface and the internal feature change of the sensor tag; Acquire the amplitude and phase characteristics between the sensor tag and the RFID reader according to the relationship; train the defects on the surface of the metal structure according to the amplitude and phase characteristics, and extract the characteristics of the corresponding defects to draw a characteristic curve function, thereby completing the process based on UHF passive RFID detection of metal structures. Through the above design, the present invention solves the problem that traditional tags cannot perform feature detection on metals. The method of the invention is flexible and has strong popularization and application value.

Description

technical field [0001] The invention belongs to the field of structural health monitoring of practical machinery and civil infrastructure construction, and in particular relates to a metal structure health detection method based on UHF passive RFID. Background technique [0002] At present, a large number of metal materials are used at home and abroad to design and manufacture racks, bridges and building loads, landmark buildings and entertainment facilities, etc. Metal is everywhere in people's lives. For metals that have been bearing huge pressure and exposed to the external environment all the year round, the metal structure cannot be slightly wrong. Due to the long-term bearing pressure of the metal and environmental weathering, erosion, unknown factors caused by fatigue or corrosion on the metal structure may induce dangerous accidents , endangering the life safety of the public and the safety of social property. Therefore, for SHM, it is indispensable to detect the hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K17/00G06F30/20G06K9/62
CPCG06K17/0029
Inventor 李强陈建彬赵亮文豪李祥
Owner SOUTHWEAT UNIV OF SCI & TECH
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