公开(公告)号：US10048226B2

公开(公告)日：2018-08-14

申请号：US14961367

申请日：2015-12-07

Applicant: Tsinghua University ,  Shengli Oilfield Branch Company of China Petroleum Chemical Co., Ltd. ,  Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd.

Inventor： Songling Huang ,  Wei Zhao ,  Shen Wang ,  Huanquan Sun ,  Laiju Han ,  Shihua Zhang ,  Yongtai Sun

IPC: G06K9/00 ,  G01N27/82 ,  G01N17/04

Abstract: An imaging method and an imaging apparatus based on a magnetic flux leakage testing. The imaging method includes: selecting an imaging region having a corrosion defect on a pipeline to be tested; dividing the imaging region into a plurality of grid areas; scanning by a three-dimensional sensor array the pipeline to be tested so as to obtain magnetic flux leakage testing data; creating a three-dimensional orthogonal coordinate system in the imaging region, defining a first two-dimensional matrix of defect images according to the plurality of grid areas based on the three-dimensional orthogonal coordinate system, and creating a second two-dimensional matrix of magnetic flux leakage signals according to the magnetic flux leakage testing data based on the three-dimensional orthogonal coordinate system; and mapping the second two-dimensional matrix to the first two-dimensional matrix using a pre-trained wavelet neural network so as to image the corrosion defect.

公开(公告)号：US11378548B2

公开(公告)日：2022-07-05

申请号：US17146703

申请日：2021-01-12

Applicant: Tsinghua University

Inventor： Songling Huang ,  Wenzhi Wang ,  Wei Zhao ,  Shen Wang ,  Zijing Huang ,  Xiaochun Song ,  Lisha Peng

IPC: G01N27/87 ,  G01N27/90

Abstract: A device and a method for testing a steel defect based on internal and external magnetic perturbation. The device includes: a magnetizer comprising a magnetization source and a magnet yoke, arranged on a surface of a sample, and configured to generate two types of typical magnetic field regions applied to testing based on internal and external magnetic perturbation; a double-row magnetic sensor probe, configured to collect internal and external magnetic perturbation data; a master controller, configured to perform pre-processing on the internal and external magnetic perturbation data, and store the pre-processed data; scanner wheels, configured to generate a sampling trigger pulse during scanning to enable the master controller to receive the internal and external magnetic perturbation data from the probes; and a host computer, configured to analyze the pre-processed data uploaded by the master controller to obtain a defect quantitative result.

公开(公告)号：US11150311B2

公开(公告)日：2021-10-19

申请号：US16904075

申请日：2020-06-17

Applicant: Tsinghua University

Inventor： Songling Huang ,  Wenzhi Wang ,  Lisha Peng ,  Wei Zhao ,  Shen Wang ,  Zijing Huang

IPC: G01R33/00 ,  G01R33/038 ,  H01F7/02

Abstract: A device and a method for detecting a defect contour with omnidirectionally equal sensitivity based on magnetic excitation are provided. The device includes a magnetic sensor array arranged in a spatially uniform magnetic field and configured to collect a magnetic field signal, and a data analysis module configured to analyze the magnetic field signal, extract a distorted magnetic field signal, and obtain an image of the defect contour based on the distorted magnetic field signal.

公开(公告)号：US10436753B2

公开(公告)日：2019-10-08

申请号：US15862771

申请日：2018-01-05

Applicant: Nanchang Hangkong University ,  Tsinghua University

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

IPC: G01N29/06 ,  G01N29/11 ,  G01N29/07 ,  G01N29/44 ,  G01N29/24

Abstract: A method for adjusting array of omnidirectional EMATs includes: uniformly arranging N EMATs in a detection region of a metal plate; calculating positions of scattering points according to amplitudes and travel times of guided wave scattering signals, and forming a first defect profile curve by performing three smooth spline interpolations on coordinate data of positions of scattering points; calculating curvatures of points on the first defect profile curve by solving a first and second derivatives of a function of the first defect profile curve; determining an array adjustment region by comparing the curvature with a preset threshold, adjusting the array and calculating a second defect profile curve; and performing data fusion on the first and second defect profile curves to form a defect profile image of the metal plate.

公开(公告)号：US11099156B2

公开(公告)日：2021-08-24

申请号：US16403990

申请日：2019-05-06

Applicant: Tsinghua University

Inventor： Songling Huang ,  Wei Zhao ,  Shen Wang ,  Xinjie Yu ,  Lisha Peng ,  Jun Zou ,  Fuping Wang ,  Jiarui Dong ,  Lin Gui ,  Yue Long

IPC: G01N27/83 ,  G01N17/00 ,  G01N27/02 ,  G01N27/90

Abstract: The present disclosure provides a method and a device for detecting and evaluating a defect with electromagnetic multi-field coupling. The method includes magnetizing a pipeline with the electromagnetic multi-field coupling; detecting a defect of the pipeline along an axial direction of the pipeline at a constant speed; collecting signals at a position of the defect to obtain magnetic leakage signals in three dimensions and an electrical impedance signal; pre-processing the collected signals; decoupling the pre-processed signals, to obtain decoupled magnetic leakage signals and a decoupled electrical impedance signal; performing impedance analysis on the decoupled electrical impedance signal, and determining a type of the defect based on a phase angle of the decoupled electrical impedance signal; and performing quantification analysis on the decoupled magnetic leakage signals and performing quantification evaluation on a size of the defect using a neural network defect quantification method.

公开(公告)号：US10962504B2

公开(公告)日：2021-03-30

申请号：US15829586

申请日：2017-12-01

Applicant: Hubei University of Technology ,  Tsinghua University ,  China Special Equipment Inspection and Research Institute ,  Eddysun (Xiamen) Electronic Co., Ltd. ,  Huazhong University of Science and Technology

Inventor： Songling Huang ,  Xiaochun Song ,  Gongtian Shen ,  Wei Zhao ,  Junming Lin ,  Yihua Kang ,  Yu Zhang ,  Shen Wang

IPC: G01N29/06 ,  G01N29/44 ,  G01N29/42 ,  G01N29/24 ,  G01N29/46

Abstract: Disclosed are a method and device for compressing and reconstructing data. The method includes: disposing a transmitting EMAT array and a receiving EMAT array; exciting a Lamb wave, receiving the Lamb wave, subjecting the Lamb wave to narrowband filtering with the narrowband frequency, to form detecting data x(n); analysing the detecting data with a DFT; reconstructing original detecting data and calculating a reconstruction error according to the measurement vector and the recovery matrix by using a TLBO algorithm; optimizing measurement vector and recovery matrix; transmitting the measurement vector to a supervisory device.

公开(公告)号：US10266942B2

公开(公告)日：2019-04-23

申请号：US15683910

申请日：2017-08-23

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： Peng Liu ,  Wei Zhao ,  Jiang-Tao Wang ,  Kai-Li Jiang ,  Shou-Shan Fan

IPC: C23C16/26 ,  C01B32/205 ,  C01B32/194 ,  C01B32/186 ,  C23C16/46 ,  B82Y30/00 ,  B82Y40/00

Abstract: A method for making artificial graphite includes placing a graphene film on a surface of a base, to obtain a graphene film/base composite structure. The graphene film includes a first surface and a second surface opposite to the first surface, and the second surface is in direct contact with the surface of the base. The graphene film/base composite structure is placed in a reaction chamber, and a carbon layer is formed on the first surface of the graphene film, to obtain a carbon layer/graphene film/base composite structure. The carbon layer/graphene film/base composite structure is graphitized in an inert gas environment or a vacuum environment to obtain artificial graphite.

公开(公告)号：US20190004124A1

公开(公告)日：2019-01-03

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

CPC classification number: G01R33/091 ,  F17D5/06 ,  G01M3/40 ,  G01R33/098

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：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：US10011488B2

公开(公告)日：2018-07-03

申请号：US14526449

申请日：2014-10-28

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： Kai-Li Jiang ,  Jia-Ping Wang ,  Shou-Shan Fan ,  Xiao-Yang Lin ,  Wei Zhao ,  Peng Liu

IPC: D01F9/12 ,  C01B31/02 ,  C01B31/04

CPC classification number: C01B32/05 ,  C01B32/16 ,  C01B32/184 ,  D01F9/12

Abstract: A method for making carbon fiber film includes drawing a carbon nanotube film from a carbon nanotube array. The carbon nanotube film is successively passed through a first room and a second room. A carrier gas and a carbon source gas are supplied to the first room and a carbon layer is formed on the carbon nanotube film located in the first room. The carbon nanotube film with the carbon fiber film is taken into the second room from the first room, and the carbon layer is graphitized.