中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

4 records (took 0.009 seconds)

    Method for reconstructing defect
    2.
    发明授权
    Method for reconstructing defect 有权

    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.

    Method and device for detecting and evaluating defect
    3.
    发明授权
    Method and device for detecting and evaluating defect 有权

    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.

Patent Agency Ranking