作者:沈常宇，李佳慧，方泽昊，张智超，朱周洪
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Authors:SHEN Chang-yu,LI Jia-hui,FANG Ze-hao,ZHANG Zhi-chao,ZHU Zhou-hong
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摘要:摘要:针对锅炉、压力容器、高压管道等承压设备的铁磁性基体，易出现腐蚀、裂纹等损伤，存在极大的安全隐患这一问题，依据低频漏磁检测原理，通过软件立体建模及电磁检测仿真，采用基于霍尔元件的传感器与STM32F1微处理器的信号采样处理系统以及基于nRF24L01的无线通信模块，提出一种针对铁磁性材料缺陷的低频电磁检测及其信号处理系统。最终实验验证了该系统能够在10~200 Hz的频率范围内、磁感应强度在±10 mT范围内的低频电磁信号实现高精度检测，提升了漏磁无损探伤检测的准确度和效率。
Abstract:Abstract:Ferromagnetic substrates of pressure equipment such as boilers， pressure vessels and high-pressure pipes are easy to be corroded， resulting in huge potential safety hazard. According to the principle of low-frequency magnetic flux leakage testing， through software three-dimensional modeling and electromagnetic testing simulation， and the signal sampling and processing system based on Hall element sensor and STM32F1 microprocessor with the wireless communication module based on nRF24L01， a low frequency electromagnetic field detection system and its signal processing system were proposed. Experimental results showed that the system can achieve high-precision detection in the frequency range of 10~200 Hz and the low-frequency electromagnetic signal with magnetic induction intensity within ±10 mT， which improves the accuracy and efficiency of magnetic flux leakage nondestructive testing.

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