Patents by Inventor Hongnan Li

Hongnan Li 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: 20190122131
    Abstract: The present invention belongs to the technical field of health monitoring for civil structures, and an anomaly identification method considering spatial-temporal correlation is proposed for structural monitoring data. First, define current and past observation vectors for the monitoring data and pre-whiten them; second, establish a statistical correlation model for the pre-whitened current and past observation vectors to simultaneously consider the spatial-temporal correlation in the monitoring data; then, divide the model into two parts, i.e., the system-related and system-unrelated parts, and define two corresponding statistics; finally, determine the corresponding control limits of the statistics, and it can be decided that there is anomaly in the monitoring data when each of the statistics exceeds its corresponding control limit.
    Type: Application
    Filed: February 12, 2018
    Publication date: April 25, 2019
    Inventors: Tinghua YI, Haibin HUANG, Hongnan LI, Shuwei MA
  • Patent number: 9297691
    Abstract: A fiber Bragg grating (FBG) interrogation method allows for high frequency dynamic measurement. The method may utilize a broad band light source connected to the sensing elements. Each sensing element may comprise two wavelength matching FBGs, a coupler, and a photodiode. The FBG closest to the light source may attenuate the central wavelength in the transmission spectrum and thus the reflection spectrum of the second FBG. Variations in intensity of the second FBG may be measured by the photodiode and can be calibrated to the desired measurands.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: March 29, 2016
    Assignee: UNIVERSITY OF HOUSTON SYSTEM
    Inventors: Gangbing Song, Siu Chun Michael Ho, Ren Liang, Hongnan Li
  • Publication number: 20140131562
    Abstract: A fiber Bragg grating (FBG) interrogation method allows for high frequency dynamic measurement. The method may utilize a broad band light source connected to the sensing elements. Each sensing element may comprise two wavelength matching FBGs, a coupler, and a photodiode. The FBG closest to the light source may attenuate the central wavelength in the transmission spectrum and thus the reflection spectrum of the second FBG. Variations in intensity of the second FBG may be measured by the photodiode and can be calibrated to the desired measurands.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 15, 2014
    Applicant: University of Houston
    Inventors: Gangbing Song, Siu Chun Michael Ho, Ren Liang, Hongnan Li