Patents by Inventor Fuchen ZHANG

Fuchen ZHANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Stress-induced magnetic field signal acquisition method and stress measurement method based thereon
    Patent number: 11519796
    Abstract: A method for stress-induced magnetic field signal acquisition and stress measurement is disclosed. The method can include the following steps: a1, conducting AC magnetization on a to-be-tested structure by using an AC magnetic field with preset frequencies and strengths, and acquiring the excitation magnetic field signals in at least one cycle; a2, subtracting the excitation magnetic field signals in at least one cycle of a stress-free sample having the same material as the to-be-tested structure from the excitation magnetic field signals acquired in step a1 to obtain a stress-induced magnetic field signals of the to-be-tested structure; a3, quantitatively assessing the stresses in the to-be-tested structure by comparing the mean values of the stress-induced magnetic field signals acquired in step a2 with the pre-calibrated relationship of stresses and the mean values of the stress-induced magnetic field signals for the material of the to-be-tested structure.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: December 6, 2022
    Inventors: Hongmei Li, Fuchen Zhang, Chengxiang Shi
  • STRESS-INDUCED MAGNETIC FIELD SIGNAL ACQUISITION METHOD AND STRESS MEASUREMENT METHOD BASED THEREON
    Publication number: 20200209076
    Abstract: A method for stress-induced magnetic field signal acquisition and stress measurement is disclosed. The method can include the following steps: a1, conducting AC magnetization on a to-be-tested structure by using an AC magnetic field with preset frequencies and strengths, and acquiring the excitation magnetic field signals in at least one cycle; a2, subtracting the excitation magnetic field signals in at least one cycle of a stress-free sample having the same material as the to-be-tested structure from the excitation magnetic field signals acquired in step a1 to obtain a stress-induced magnetic field signals of the to-be-tested structure; a3, quantitatively assessing the stresses in the to-be-tested structure by comparing the mean values of the stress-induced magnetic field signals acquired in step a2 with the pre-calibrated relationship of stresses and the mean values of the stress-induced magnetic field signals for the material of the to-be-tested structure.
    Type: Application
    Filed: December 26, 2019
    Publication date: July 2, 2020
    Applicant: Yichang Huateng Pipeline Engineering Co., Ltd.
    Inventors: Hongmei LI, Fuchen ZHANG, Chengxiang SHI