漏磁

PTC漏磁腐蚀检测数据分析系统

PTC Pipeline MFL Inspection Data Display and Analysis System

试验结果表明，BP神经网络能根据漏磁信号精确地预测缺陷的几何参数，为漏磁定量化检测提供了一种可行的方法。

The experimental results indicate that the BP neural networks can accurately predict the defect geometry parameters according to the MFL signals , the viable method is offered for MFL quantitative testing .

基于BP神经网络的漏磁定量化检测

Quantitative testing of magnetic flux leakage based on BP neural networks

使用改进型BP神经网络量化裂纹漏磁信号

Characterizing Magnetic Flux Leakage Signal of Cracks Based on Improved BP Neural Network

FPGA在管道漏磁检测中的应用

FPGA 's application to pipeline magnetic flux leakage inspection

ANSYS在管道漏磁法检测中的研究与应用

Study and application of ANSYS in magnetic flux leakage detecting in pipeline

LC型自耦漏磁变压器式镇流器的重复着火能力与设计

Repeated Inflammation Capacity and Design of LC Type Leakage Flux Autotransformer Ballast

RCC方式输出变压器漏磁分布及其影响

Distribution and Effects of Leakage Inductance of Transformer for Ringing Choke Converter

Hilbert变换在钢管漏磁检测缺陷定量化识别中的应用

Quantitative Analysis of Magnetic Flux Leakage Signal for Steel Pipe Defects Using Hilbert Transform

针对该系统的特点设计了高速数据采集板，借助Windows系统平台，采用虚拟设备驱动技术实时控制，详细叙述了漏磁信号数据分析的方法的过程。

The high-speed data acquisition board is deigned by VXD techniques in the windows enviroment , the method and process of data analysis are described in detail .

通过仿真实验验证，本系统的设计能够实现基于USB总线的漏磁检测数据采集及传输功能，系统工作稳定。

The simulation results show that the system can complete the function of magnetic flux leakage data collection and transmission based on USB .

漏磁NDT原理的研究

Principle research on magnetic leakage NDT

磁控电抗器（MagneticControlledReactor，MCR）.系统的损耗主要包括铁芯损耗、绕组损耗、半导体器件损耗以及由漏磁产生的杂散损耗等。

The loss of Magnetic Controlled Reactor ( MCR ) includes core loss , windings loss , semiconductor devices loss and stray loss caused by leakage magnetic flux .

通过在Hall探头两侧表面加装导磁块的方法，提高了探头对缺陷漏磁信号的轴向分量的检测能力。

The Hall sensors are improved by setting iron plate on its two-side surfaces , which increases its abilities to test the axial direction component of the magnetic flux leakage signals .

螺旋焊缝噘嘴错边缺陷三轴漏磁信号分析中国低活化马氏体钢TIG焊焊接的三维数值模拟

The Triaxial Magnetic Flux Leakage Signal Analysis of Spiral Weld Roof Topping and Hi-Low Defects Three-dimensional Numerical of CLAM Steel on TIG Welding

在本文中首先讨论了漏磁探伤的基本原理，有限元分析原理及其在电磁场中的应用，介绍了ANSYS有限元分析软件的应用，并对缺陷进行了模拟分析。

We also introduce the application of the finite element in analysis of electromagnetic and the use of the software of ANSYS , which is a software about finite element .

基于ISODATA算法的漏磁信号到缺陷轮廓的网络映射

Net Mapping from Magnetic Flux Leakage Signals to Profiles of Defects Based on ISODATA Algorithm

利用小波变换和RBF（RadiusBasisFunction）神经网络技术对漏磁检测系统中的缺陷信号进行分类。

According to the non-stationary characteristics of pulse echo signals of flaw in magnetic flux leakage testing system , a method of flaw classification based on the wavelet transform and radius basis function ( RBF ) neural network was presented .

漏磁（MFL）检测是油气管道在线检测中应用非常成熟的一种无损检测技术。

Magnetic flux leakage ( MFL ) inspection is a most successful non-destructive evaluation technique used for in-service inspection of pipelines .

为了满足快速检测和自动分选的需要，研制了MLTIB型抽油杆漏磁探伤机。

MLT-I-B magnetic flux leakage testing system was developed to meet the needs of rapid inspection and automatic sorting .

然后，本文运用ANSYS对探头模型进行了有限元分析，对缺陷的埋藏深度和大小、钢管的壁厚、磁化的强度和提离间隙对漏磁检测的影响进行了仿真分析。

Thirdly , the paper makes analysis of the probe model with ANSYS , the simulation analysis of the burial depth , size of defects ; pipe wall thickness , magnetization intensity and lift-off were made .

多通道高速数据采集单元是以FPGA为核心，产生控制高速模拟开关和A/D的时来完成对多通道信号的采集，并将采集到的数据送到缺陷漏磁数据压缩单元中。

As the core of the high speed multi-channel data collection unit , FPGA provides time order to control high speed analogue multiplexers and A / D to sample the multi data which-will be transmitted to data compression unit .

将SPIHT算法与自适应算术编码结合应用于一维漏磁信号压缩，可以实现高压缩比、多种码率压缩编码。

Combined with adaptive arithmetic coding scheme , SPIHT algorithm modified for the one-dimensional case could compress signals with the .

文中描述了Y△混合绕组每极每相槽数q为任意值时，谐波绕组系数的计算，谐波单位漏磁导∑s的计算与选取。

In this paper , the calculation of harmonic winding factor and unity harmonic leakage magnetic conduction ∑ _s were described for any q value in Y △ mixture winding , and the choice of ∑ _s were also discussed .

为了对CNG储气井安全隐患进行有效检测，根据漏磁检测原理，应用ANSYS对CNG储气井井筒漏磁磁场分布进行模拟。

In order to detect the potential defects of CNG wells effectively , ANSYS is used to simulate the Magnetic Flux Leakage ( MFL ) field of CNG wells according to MFL testing principle .

通过运用ANSYS仿真分析软件对实验管道缺陷进行仿真分析，验证了周向励磁方式的漏磁检测装置磁化节对缺陷的可检出性。

Through carries on the simulation analysis using the ANSYS simulation analysis software to the test whole flaw , confirmed the circumferential excitation way leakage detector set magnetization festival to be possible to pick out the nature to the flaw .

在对基于漏磁产品的总结、评测的基础上，确定了现在的钢丝绳芯输送带X射线透视检测方案，此方案突破了漏磁检测的局限性，实现了皮带内部结构的可视化。

We worked out the solution of monitoring steel cord belt based on X-Ray non-destructive on the basis of evaluation and summary to MFL-based products . This solution brakes though the limitations of MFL-test and realizes the visual of internal structure of the belt .

增元通道增益不一致情况下一种新的DOA快速估计算法提出了各通道增益放大、各路漏磁信号偏离调整、波形微分、数字滤波和平滑等漏磁信号预处理方法；

A novel approach to fast DOA estimation with sensor gain and phase perturbations The signals are pre-processed and transformed by each sensor gain amplification and accordance , signals differential conversion , digital filter and smooth ;

本文以FPGA作为新型管道漏磁检测系统的控制核心，对基于FPGA的管道漏磁检测系统进行了研究与设计，内容包括硬件设计和软件设计两部分。

We regard FPGA as control 's core of new-type pipeline magnetic flux leakage detecting system , research and design control 's core of pipeline magnetic flux leakage detecting system based on FPGA . The project includes two parts . One is the hardware .

基于HY-6070C板钢管漏磁检测系统实验研究

Test research of pipe magnetic flux leakage base on hY & 6070C