Patents by Inventor Arata Masuda

Arata Masuda 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 and apparatus for diagnosing a damage in a structure
    Patent number: 8371170
    Abstract: In the diagnosis of a structure, at least one electromechanical transducer is fixed to a structure as an object of diagnosis and is driven with an alternating voltage of a constant amplitude, and a current flowing through the at least one electromechanical transducer is measured. Next, high frequency components around a driving frequency of the electromechanical transducer are separated from a signal of the current. Next, modulation information due to a damage is extracted from amplitude and/or phase demodulation of the high frequency components. Then a damage index is evaluated based on the modulation information. Thus, structural health can be diagnosed with use of at least one electromechanical transducer, without baseline data, in one measurement.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: February 12, 2013
    Assignee: National University Corporation Kyoto Institute of Technology
    Inventor: Arata Masuda
  • METHOD AND APPARATUS FOR DIAGNOSING DAMAGE IN A STRUCTURE
    Publication number: 20100319452
    Abstract: In the diagnosis of a structure, at least one electromechanical transducer is fixed to a structure as an object of diagnosis and is driven with an alternating voltage of a constant amplitude, and a current flowing through the at least one electromechanical transducer is measured. Next, high frequency components around a driving frequency of the electromechanical transducer are separated from a signal of the current. Next, modulation information due to a damage is extracted from amplitude and/or phase demodulation of the high frequency components. Then a damage index is evaluated based on the modulation information. Thus, structural health can be diagnosed with use of at least one electromechanical transducer, without baseline data, in one measurement.
    Type: Application
    Filed: February 12, 2009
    Publication date: December 23, 2010
    Inventor: Arata Masuda