A microwave non-destructive testing method for controlling polymeric coating of metal layers in industrial products

被引：10
|
作者：
Mazzinghi, A. [1 ]
Freni, A. [1 ]
Capineri, L. [1 ]
机构：
[1] Univ Florence, DINFO, Via Santa Marta 3, I-50139 Florence, Italy
来源：
NDT & E INTERNATIONAL | 2019年 / 102卷 / 207-217期
关键词：
Inspection systems; Sensor; Sizing; Thickness; Non-destructive testing; Microwave sensing; Periodic structures; Oil industry; Metal-plastic composites; DISBOND;
D O I：
10.1016/j.ndteint.2018.12.003
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The paper exploits the possibility of extracting the geometric properties of a polymeric coating of periodic metal layers used in industrial products from non-contact microwave backscattering measurements. Specifically, a flexible pipe having a periodically corrugated metal profile coated with a thick Polivinylidenedifluoride (PVDF) layer, suitable for oil industry applications, has been considered. The combined use of magnitude and phase of the reflected signal, acquired on a wide relative frequency band (similar to 15%), allows calculating the dielectric filling level and the period of each corrugation with accuracy better than 1/100 of the period length, 21 mm in our case. The results of an experimental campaign, carried out to estimate the accuracy achievable in the operational environment, are also shown.
引用
收藏
页码：207 / 217
页数：11
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