Patents by Inventor Sundarrajan Asokan

Sundarrajan Asokan 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).

  • Strain and temperature discrimination using fiber bragg gratings in a cross-wire configuration
    Patent number: 9267854
    Abstract: A fiber Bragg grating cross-wire sensor may be used to independently determine strain and temperature variation. An example fiber Bragg grating cross-wire sensor comprises a first fiber Bragg grating (FBG) that reflects a first percentage, R1, of light of a first wavelength, ?1, and a second FBG that reflects a second percentage, R2, of light of a second wavelength, ?2. The second FBG is positioned orthogonal to the first FBG, and ?1 is substantially equal to ?2, but R1 is different from R2. As the FBG cross-wire sensor experiences a strain and/or a temperature variation, the wavelengths of light reflected by the first FBG and the second FBG will shift from the first and second wavelength, ?1 and ?2, to first and second shifted wavelengths, ?A and ?T, respectively. Based on R1, R2, ?1, ?A, and ?T, the strain and/or the temperature variation may be independently determined.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: February 23, 2016
    Assignee: Indian Institue of Science
    Inventors: Sundarrajan Asokan, Kalaga Venu Madhav, Aashia Rahman, Balaji Srinivasan
  • Strain and Temperature Discrimination Using Fiber Bragg Gratings in a Cross-Wire Configuration
    Publication number: 20120176597
    Abstract: A fiber Bragg grating cross-wire sensor may be used to independently determine strain and temperature variation. An example fiber Bragg grating cross-wire sensor comprises a first fiber Bragg grating (FBG) that reflects a first percentage, R1, of light of a first wavelength, ?1, and a second FBG that reflects a second percentage, R2, of light of a second wavelength, ?2. The second FBG is positioned orthogonal to the first FBG, and ?1 is substantially equal to ?2, but R1 is different from R2. As the FBG cross-wire sensor experiences a strain and/or a temperature variation, the wavelengths of light reflected by the first FBG and the second FBG will shift from the first and second wavelength, ?1 and ?2, to first and second shifted wavelengths, ?A and ?T, respectively. Based on R1, R2, ?1, ?A, and ?T, the strain and/or the temperature variation may be independently determined.
    Type: Application
    Filed: November 4, 2010
    Publication date: July 12, 2012
    Applicant: INDIAN INSTITUTE OF SCIENCE
    Inventors: Sundarrajan Asokan, Kalaga Venu Madhav, Aashia Rahman, Balaji Srinivasan