公开(公告)号：US20180231503A1

公开(公告)日：2018-08-16

申请号：US15831894

申请日：2017-12-05

Applicant: Nanchang Hangkong University ,  Tsinghua University

Inventor： Songling Huang ,  Kai Song ,  Wei Zhao ,  Chao Lu ,  Yu Zhang ,  Shen Wang ,  Jiarui Dong ,  Zhe Wang

IPC: G01N29/24 ,  G01N29/04 ,  G01N29/06 ,  G01N29/44

CPC classification number: G01N29/2412 ,  G01N29/048 ,  G01N29/069 ,  G01N29/07 ,  G01N29/11 ,  G01N29/4418 ,  G01N29/4427

Abstract: An imaging method based on guided wave scattering of omni-directional EMATs includes: selecting an nth omni-directional EMAT from N omni-directional EMATs uniformly arranged in a detection region of a metal plate to be detected as an excitation EMAT; selecting m omni-directional EMATs as omni-directionally receiving EMATs to omni-directionally receive an ultrasonic guided wave signal, and calculating a travel time and intensity of the ultrasonic guided wave signal; judging whether the excitation EMAT and the omni-directionally receiving EMATs form a scattering group, if yes, calculating a position of a scattering point; judging whether the position of the scattering point is within a preset scattering region, if yes, determining the position of the scattering point as an effective scattering point; repeating the above steps until all N omni-directional EMATs have excited omni-directional ultrasonic guided waves, and performing curve fitting on all effective scattering points to obtain a defect profile image.

公开(公告)号：US10935520B2

公开(公告)日：2021-03-02

申请号：US15910433

申请日：2018-03-02

Applicant: Tsinghua University

Inventor： Songling Huang ,  Wei Zhao ,  Lisha Peng ,  Shen Wang ,  Di Cheng ,  Jiarui Dong

IPC: G01N27/83 ,  G06F111/10 ,  G06F30/20 ,  G01N17/00 ,  G06F30/23

Abstract: A method for reconstructing a defect includes: S1, establishing a database of magnetic flux leakage signals of a unit defect and acquiring a magnetic flux leakage signal of the unit defect; S2, acquiring a target magnetic flux leakage signal; S3, initially setting a scaling factor k; S4, constructing a forward model; S5, inputting the k into the forward model and performing forward prediction according to the k to acquire a predicted magnetic flux leakage signal for the defect to be detected; S6, calculating an error between the target magnetic flux leakage signal and the predicted magnetic flux leakage signal, and determining whether the error is smaller than an error threshold ε, if yes, executing S7; otherwise, executing S5 after the k is corrected; and S7, scaling the unit defect according to the k to acquire a final size of the defect to be detected.

公开(公告)号：US10788454B2

公开(公告)日：2020-09-29

申请号：US16044590

申请日：2018-07-25

Applicant: Hubei University of Technology ,  Tsinghua University

Inventor： Songling Huang ,  Xiaochun Song ,  Lisha Peng ,  Wei Zhao ,  Shen Wang ,  Xinjie Yu ,  Shisong Li

IPC: G01N27/83

Abstract: A method for identifying a defect opening profile includes: acquiring a vertical component of a magnetic flux leakage signal of a defect; identifying right-angle features and corresponding right-angle position points of the defect from the vertical component; obtaining all possible right-angle types at each right-angle position point of the defect according to the corresponding right-angle feature of the vertical component; traversing all the possible right-angle types at each right-angle position point to determine respective optimal right-angle type at each right-angle position point; and drawing the defect opening profile according to the respective optimal right-angle type at each right-angle position point.

公开(公告)号：US10338160B2

公开(公告)日：2019-07-02

申请号：US15840650

申请日：2017-12-13

Applicant: Tsinghua University

Inventor： Songling Huang ,  Wei Zhao ,  Shen Wang ,  Lisha Peng ,  Yu Zhang ,  Xinjie Yu ,  Jun Zou ,  Lin Gui ,  Fuping Wang

IPC: G01R33/09 ,  F17D5/06 ,  G01M3/40

Abstract: A high-precision imaging and detecting device for detecting a small defect of a pipeline by a helical magnetic matrix. The device includes: a helical excitation module including a helical excitation coil; a magnetic matrix detection module, disposed at an inner side of the helical excitation coil and including at least one magnetic sensor group arranged at intervals along an axial direction of the helical excitation coil, group including a plurality of magnetic sensors evenly spaced apart and arranged along a circumferential direction of the helical excitation coil, and the magnetic sensor being configured to detect an induction magnetic field of the pipeline; a signal processing module, connected with the magnetic matrix detection module, and configured to receive, process and output an induction magnetic field signal of the pipeline detected by the magnetic sensor.

公开(公告)号：US10030804B2

公开(公告)日：2018-07-24

申请号：US14759300

申请日：2014-09-16

Applicant: Tsinghua University

Inventor： Songling Huang ,  Wei Zhao ,  Shen Wang ,  Xinjie Yu ,  Junjie Chen ,  Zheng Wei

IPC: G01M3/40 ,  G01N27/82 ,  F16L11/08 ,  F16L55/38 ,  F16L101/30

CPC classification number: F16L55/38 ,  F16L2101/30 ,  G01M3/40 ,  G01N27/82

Abstract: An inner detecting device for subsea oil and gas pipeline includes a support shaft defining a sealed chamber therein; a packer cup coupled to the support shaft; a hinge assembly coupled to the support shaft, swinging with respect to the support shaft in a radial direction and sliding with respect to the support shaft in an axial direction; a magnetic detector connected to the hinge assembly to move with respect to the support shaft in the radial and axial directions, and the magnetic detector tending to move away from the support shaft in the radial direction; a battery pack; an electric recorder electrically connected to the battery pack; and a mileage recorder recording a travel distance of the inner detecting device within the pipeline.

公开(公告)号：US20150091555A1

公开(公告)日：2015-04-02

申请号：US14262999

申请日：2014-04-28

Applicant: Tsinghua University

Inventor： Songling Huang ,  Wei Zhao ,  Shen Wang ,  Qun Liu

IPC: G01N27/82

CPC classification number: G01N27/82

Abstract: An apparatus for detecting magnetic flux leakage signals is provided. The apparatus includes: M three-axis magnetic field sensors configured to detect a three-dimensional magnetic field intensity in M locations respectively to obtain M three-dimensional magnetic field intensity data, in which M is an integer larger than three; a field programmable gate array configured to receive and process the M three-dimensional magnetic field intensity data respectively; a main control chip configured to receive and pack the processed M three-dimensional magnetic field intensity data; and a data output interface configured to output the packed M three-dimensional magnetic field intensity data.

Abstract translation: 提供一种用于检测漏磁信号的装置。 该装置包括：M个三轴磁场传感器，被配置为分别检测M个位置的三维磁场强度，以获得M个三维磁场强度数据，其中M是大于3的整数; 现场可编程门阵列，被配置为分别接收和处理M个三维磁场强度数据; 主控制芯片，被配置为接收和打包所处理的M个三维磁场强度数据; 以及数据输出接口，被配置为输出打包的M个三维磁场强度数据。