Patents by Inventor Chian WONG

Chian WONG 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).

  • Publication number: 20190345830
    Abstract: An inter-blade vibration damper for a gas turbine engine has an elongate damper body. The damper body is formed as a truncated cone and has a longitudinal axis. The elongate damper body is formed as a truncated cone. A conic surface of the damper body contacts a portion of a first blade and a portion of an adjoining second blade.
    Type: Application
    Filed: April 12, 2019
    Publication date: November 14, 2019
    Applicant: ROLLS-ROYCE plc
    Inventors: Luca PESARESI, Loic SALLES, Chian WONG, Christoph W. SCHWINGSHACKL, Adrian M. JONES
  • Patent number: 10451517
    Abstract: Methods of vibration testing a component are provided. In a model of the component, define alignment points corresponding to physical features and define measurement points at positions which vibrate when excited at predefined excitation frequencies (fe), the excitation frequencies (fe) each corresponding to one or more vibrational modes. On the component measure the position of the physical features corresponding to the alignment points in the model and calculate the position of the laser source. Excite the component at an excitation frequency and measure the amplitude of vibration at each measurement point. Extract the mode shape from the measured vibration amplitudes. In the model, rotate a local co-ordinate system (x, y, z) at each measurement point until one axis is directed towards the laser source. Extract the mode shape from the component model. Compare the mode shapes extracted from the model and from measured vibration amplitudes.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: October 22, 2019
    Assignee: ROLLS-ROYCE plc
    Inventors: Mattheus Bakker, Chian Wong
  • Publication number: 20170122835
    Abstract: Methods of vibration testing a component are provided. In a model of the component, define alignment points corresponding to physical features and define measurement points at positions which vibrate when excited at predefined excitation frequencies (fe), the excitation frequencies (fe) each corresponding to one or more vibrational modes. On the component measure the position of the physical features corresponding to the alignment points in the model and calculate the position of the laser source. Excite the component at an excitation frequency and measure the amplitude of vibration at each measurement point. Extract the mode shape from the measured vibration amplitudes. In the model, rotate a local co-ordinate system (x, y, z) at each measurement point until one axis is directed towards the laser source. Extract the mode shape from the component model. Compare the mode shapes extracted from the model and from measured vibration amplitudes.
    Type: Application
    Filed: October 4, 2016
    Publication date: May 4, 2017
    Applicant: ROLLS-ROYCE plc
    Inventors: Mattheus BAKKER, Chian WONG
  • Patent number: 8169665
    Abstract: A tone dependent green-noise error diffusion method includes setting a first threshold and a second threshold, and determining a two-level value of a color level of an input image according to the first threshold and the second threshold; subtracting the two-level value from the color level value to generate an error value; performing an error diffusion on the error value to generate an error diffusion accumulation value; adjusting the color level according to the error diffusion accumulation value; performing a hysteresis filtering on the two-level value to generate an output dependent feedback value; and adjusting the color level according to the output dependent feedback value.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: May 1, 2012
    Assignees: Silitek Electronic (Guangzhou) Co., Ltd., Lite-On Technology Corp.
    Inventors: Wen-Chian Wong, Chen-Chung Chen
  • Publication number: 20100245927
    Abstract: A tone dependent green-noise error diffusion method includes setting a first threshold and a second threshold, and determining a two-level value of a color level of an input image according to the first threshold and the second threshold; subtracting the two-level value from the color level value to generate an error value; performing an error diffusion on the error value to generate an error diffusion accumulation value; adjusting the color level according to the error diffusion accumulation value; performing a hysteresis filtering on the two-level value to generate an output dependent feedback value; and adjusting the color level according to the output dependent feedback value.
    Type: Application
    Filed: March 30, 2009
    Publication date: September 30, 2010
    Inventors: Wen-Chian Wong, Chen-Chung Chen