Patents by Inventor Guoqing Gou

Guoqing Gou 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).

  • Method for measuring deviation angle of fatigue microcrack based on nonlinear ultrasound
    Patent number: 11946735
    Abstract: Disclosed is a method fir measuring a deviation angle of a fatigue microcrack based on nonlinear ultrasound, comprising: preliminarily positioning a fatigue microcrack to obtain a center of the microcrack; selecting a horizontal positive direction, and defining an orientation angle; drawing a positive circumference on a surface of a metal plate, and selecting a fixed interval angle; placing an excitation sensor and a receiving sensor on the drawn positive circumference according to the orientation angle; ultrasonically testing each group of ultrasonic sensing paths, and recording time domain waveform signals formed by each group of ultrasonic sensing paths; converting each group of time domain waveform signals into a corresponding frequency domain graph, extracting an ultrasonic fundamental wave signal amplitude and a second harmonic waveform amplitude, and calculating a relative nonlinear coefficient; drawing an orientation angle-relative nonlinear coefficient polar coordinate graph; and determining a deviat
    Type: Grant
    Filed: November 3, 2022
    Date of Patent: April 2, 2024
    Assignee: Southwest Jiaotong University
    Inventors: Guoqing Gou, Feifei Qiu, Bing Chen, Yuzi Hu, Zhongyin Zhu, Junjun Jin
  • METHOD FOR MEASURING DEVIATION ANGLE OF FATIGUE MICROCRACK BASED ON NONLINEAR ULTRASOUND
    Publication number: 20230048646
    Abstract: Disclosed is a method for measuring a deviation angle of a fatigue microcrack based on nonlinear ultrasound, comprising: preliminarily positioning a fatigue microcrack to obtain a center of the microcrack; selecting a horizontal positive direction, and defining an orientation angle; drawing a positive circumference on a surface of a metal plate, and selecting a fixed interval angle; placing an excitation sensor and a receiving sensor on the drawn positive circumference according to the orientation angle; ultrasonically testing each group of ultrasonic sensing paths, and recording time domain waveform signals formed by each group of ultrasonic sensing paths; converting each group of time domain waveform signals into a corresponding frequency domain graph, extracting an ultrasonic fundamental wave signal amplitude and a second harmonic waveform amplitude, and calculating a relative nonlinear coefficient; drawing an orientation angle-relative nonlinear coefficient polar coordinate graph; and determining a deviat
    Type: Application
    Filed: November 3, 2022
    Publication date: February 16, 2023
    Inventors: Guoqing Gou, Feifei Qiu, Bing Chen, Yuzi Hu, Zhongyin Zhu, Junjun Jin