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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
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.
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公开(公告)号：US10605790B2
公开(公告)日：2020-03-31
申请号：US15665535
申请日：2017-08-01
Applicant: Tsinghua University
Inventor： Songling Huang , Wei Zhao , Yu Zhang , Qing Wang , Shen Wang
IPC: G01N29/44 , G01N29/24 , G01N29/07 , G01N29/12 , F03D17/00 , F03D80/50 , G01N29/04 , G01N29/22 , G01N29/26 , G01N29/34
Abstract: The present disclosure provides a device and method for detecting a defect in a main shaft of a wind turbine. The device includes: an excitation source, configured to generate an electromagnetic ultrasonic guided wave signal; a nickel strap, magnetized and disposed on an outer surface of an end of the main shaft; a coil, disposed at the nickel strap, configured to receive the electromagnetic ultrasonic guided wave signal such that the electromagnetic ultrasonic guided wave signal propagates in the main shaft, the coil and the nickel strap being configured to transform the electromagnetic ultrasonic guided wave signal propagating in the main shaft into an electrical signal by electromagnetic induction; a signal collector, configured to collect the electrical signal and transform the electrical signal into guided wave detection data and a wireless communication component, configured to transmit the guided wave detection data to a remote equipment.
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公开(公告)号：US10338035B2
公开(公告)日：2019-07-02
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
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.
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公开(公告)号：US10197534B2
公开(公告)日：2019-02-05
申请号：US14948398
申请日：2015-11-23
Applicant: Tsinghua University
Inventor： Songling Huang , Shen Wang , Wei Zhao , Shisong Li , Zheng Wei
Abstract: Disclosed are a method and a device for testing a defect based on an ultrasonic Lamb wave tomography. The method includes: partitioning an imaging area of a material to be tested into grids; exciting electromagnetic acoustic transducers for emitting to emit Lamb waves with a A0 mode in all directions, and electromagnetic acoustic transducers for receiving to receive the Lamb waves; obtaining a time-frequency analysis result and recording time-of-flights of testing waves; determining a first slowness of each grid to obtain a first defect area; establishing an extrapolation formula according to the first defect area, and iterating the extrapolation formula to trace and revise paths of the Lamb waves until a better imaging precision is obtained.
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5.发明授权公开(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
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.
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Patent Agency Ranking
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.
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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
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.
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公开(公告)号：US20240219311A1
公开(公告)日：2024-07-04
申请号：US18329804
申请日：2023-06-06
Applicant: Tsinghua University
Inventor： Songling Huang , Lisha Peng , Xinjie Yu , Jinghua Zhang , Shisong Li , Shuzhi Wen
CPC classification number: G01N21/8851 , G01N21/93 , G01N33/383 , G01N2021/8861 , G01N2021/8877 , G01N2201/12723
Abstract: The disclosure provides a system for electromagnetic monitoring of active cracks in a concrete dam. The system includes at least four electromagnetic signal acquisition devices and a main control module. Each electromagnetic signal acquisition device includes: an electromagnetic monitoring sensor, an electromagnetic signal acquisition module, a power supply module and a first wireless communication module, for collecting and extracting electromagnetic radiation signals generated by the active cracks in the concrete dam. The main control module includes: a second wireless communication module, a CPU, a data storage unit and a data display unit, for processing the electromagnetic radiation signals received by the second wireless communication module, positioning locations of the active cracks and quantifying sizes of the active cracks.
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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
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.
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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
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.
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