Patents by Inventor Longbiao He

Longbiao He 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).

  • Infrasound generating device based on a displacement-feedback type vibration exciter
    Patent number: 9539616
    Abstract: The infrasound generating device based on a displacement-feedback type vibration exciter comprises a displacement-feedback type vibration exciter system, an infrasound generating chamber (3) and a laser vibrometer (1); the displacement feedback mechanism is adopted in the vibration exciter (2). The piston (31) is driven by the vibration exciter to move in a sinusoidal manner in the cavity (35) of the airtight infrasound generating chamber (3) and the standard infrasonic pressure signal with low harmonic distortion can be achieved. The displacement of the moving part (22) of the vibration exciter (2) can be measured by the laser vibrometer (1) through the measurement beam (15) injecting into the vibration exciter (2) through the optical channel running through the vibration exciter and the standard infrasonic pressure can also be obtained. The value of the standard sound pressure produced by the infrasound generating chamber is calculated.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: January 10, 2017
    Assignees: ZHEJIANG UNIVERSITY, NATIONAL INSTITUTE OF METROLOGY P. R. CHINA
    Inventors: Wen He, Longbiao He, Chunyu Wang, Yuanlai Zhou, Shushi Jia
  • INFRASOUND GENERATING DEVICE BASED ON A DISPLACEMENT-FEEDBACK TYPE VIBRATION EXCITER
    Publication number: 20140140179
    Abstract: The infrasound generating device based on a displacement-feedback type vibration exciter comprises a displacement-feedback type vibration exciter system, an infrasound generating chamber (3) and a laser vibrometer (1); the displacement feedback mechanism is adopted in the vibration exciter (2). The piston (31) is driven by the vibration exciter to move in a sinusoidal manner in the cavity (35) of the airtight infrasound generating chamber (3) and the standard infrasonic pressure signal with low harmonic distortion can be achieved. The displacement of the moving part (22) of the vibration exciter (2) can be measured by the laser vibrometer (1) through the measurement beam (15) injecting into the vibration exciter (2) through the optical channel running through the vibration exciter and the standard infrasonic pressure can also be obtained. The value of the standard sound pressure produced by the infrasound generating chamber is calculated.
    Type: Application
    Filed: August 16, 2012
    Publication date: May 22, 2014
    Applicants: NATIONAL INSTITUTE OF METROLOGY P. R. CHINA, ZHEJIANG UNIVERSITY
    Inventors: Wen He, Longbiao He, Chunyu Wang, Yuanlai Zhou, Shushi Jia