Thickness Measurement Technique by Pulsed Eddy Current
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摘要: 脉冲涡流检测技术具有频谱宽、信号穿透能力强以及精确度好等优点。对脉冲涡流测厚技术进行了仿真, 即针对脉冲涡流测厚系统, 建立了有限元分析模型, 仿真分析了检测线圈上的电压的衰减规律, 得到了检测线圈上的电压随被测体厚度的变化规律, 确定了两者之间的定量关系。分析了提离距离、检测线圈参数和脉冲涡流频率对检测结果的影响。该研究为将来进行脉冲涡流测厚仪的研制提供了理论依据和数学模型。Abstract: Pulsed eddy current technique had quite a few advantages such as wide spectrum, strong penetration, high accuracy. The experiment was carried out to study the metal thickness measurement of PEC, and a finite element model for the system of the metal thickness measurement of PEC was established. Based on the finite element model established, this thesis analyzed the attenuation law of the voltage in receiving coil. By changing the thickness of tested bodies, the relationship between the voltage of receiving coil and the thickness of the tested bodies was analyzed, and also the factors that affected the measuring results such as lift-off distance, parameters of testing coil and frequency of pulsed eddy current were analyzed in detail. It provided a theoretical basis and mathematical models for the future development of the PEC gage.
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Keywords:
- Pulsed eddy current testing /
- Thickness measurement /
- Simulation /
- Affecting factors
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