Study on Electromagnetic Characteristic Compensation in Remote Field Eddy Current Testing
碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 91 === The Remote Field Eddy Current (RFEC) has been comprehensively applied to detect the wall loss of ferromagnetic tube. According to our experience, we found the problem of variation of material electromagnetic characteristics occurred on the carbon steel tube...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2003
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| Online Access: | http://ndltd.ncl.edu.tw/handle/34864997971086491611 |
| Summary: | 碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 91 === The Remote Field Eddy Current (RFEC) has been comprehensively applied to detect the wall loss of ferromagnetic tube. According to our experience, we found the problem of variation of material electromagnetic characteristics occurred on the carbon steel tube was often occurred in practice. Therefore, if we fail to compensate the change of electromagnetic characteristics during inspection, the error of evaluation will be generated. This study applied the skin-depth theory of RFEC and geometric relationship on voltage plane for deriving a compensatory model of mathematical methodology. The new evaluation curve established on the basis of this mathematical methodology is to compensate the error contributed by the change of electromagnetic characteristics in the tube. The method offered by this study has been proved to be reasonable, feasible and acceptable through the process of derivation and testing result.
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