Patents by Inventor Mahadevan Balasubramaniam

Mahadevan Balasubramaniam 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).

  • Patent number: 7495227
    Abstract: An x-ray detector is provided for use in imaging systems. The x-ray detector includes a detector subsystem configured to output electrical signals in response to reception of x-rays. The detector subsystem includes an imaging panel, a support layer and a low density core disposed between the imaging panel and the support layer.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: February 24, 2009
    Assignee: General Electric Company
    Inventors: William Andrew Hennessy, Habib Vafi, Donald Earl Castleberry, Michael John Utschig, Mahadevan Balasubramaniam, Jie Jiang, Virendra Vilas Gaikwad, Ajit Achuthan, Le Yan
  • Publication number: 20090014659
    Abstract: An x-ray detector is provided for use in imaging systems. The x-ray detector includes a detector subsystem configured to output electrical signals in response to reception of x-rays. The detector subsystem includes an imaging panel, a support layer and a low density core disposed between the imaging panel and the support layer.
    Type: Application
    Filed: July 10, 2007
    Publication date: January 15, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: William Andrew Hennessy, Habib Vafi, Donald Earl Castleberry, Michael John Utschig, Mahadevan Balasubramaniam, Jie Jiang, Virendra Vilas Gaikwad, Ajit Achuthan, Le Yan
  • Publication number: 20090003991
    Abstract: A method of detecting rubs during operation of a turbomachine comprising at least one rotating object having a tip and a shelf is provided. The method includes generating signals representative of a sensed parameter and processing the signals to generate height versus time data for the tip. The height of the tip corresponds to the distance between the tip and the shelf. The method further includes monitoring the height versus time data, in order to determine whether a change in the height data exceeds a threshold value, and detecting a rub of the rotating object(s) on a second object, when the change in the height data exceeds the threshold value. A rub detection system for a turbomachine and a turbine engine system with rub detection are also provided.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 1, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Emad Andarawis Andarawis, William Lee Herron, Samhita Dasgupta, John Harry Down, Mahadevan Balasubramaniam, David So Keung Chan, David Walter Parry
  • Patent number: 7404331
    Abstract: A sensor assembly is provided. The sensor assembly includes a sensor configured to measure an impedance value representative of a sensed parameter and a transformer coupled to the sensor. The transformer includes at least one ceramic substrate and at least one electrically conductive line disposed on the ceramic substrate to form at least one winding. The electrically conductive line includes an electrically conductive material.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: July 29, 2008
    Assignee: General Electric Company
    Inventors: James Anthony Ruud, Emad Andarawis Andarawis, Samhita Dasgupta, Minesh Ashok Shah, Mahadevan Balasubramaniam
  • Publication number: 20080072681
    Abstract: A sensor assembly is provided. The sensor assembly includes a sensor configured to measure an impedance value representative of a sensed parameter and a transformer coupled to the sensor. The transformer includes at least one ceramic substrate and at least one electrically conductive line disposed on the ceramic substrate to form at least one winding. The electrically conductive line includes an electrically conductive material.
    Type: Application
    Filed: September 27, 2006
    Publication date: March 27, 2008
    Inventors: James Anthony Ruud, Emad Andarawis Andarawis, Samhita Dasgupta, Minesh Ashok Shah, Mahadevan Balasubramaniam
  • Patent number: 7336862
    Abstract: A fiber optic sensor is provided. The fiber optic sensor includes a fiber core having a plurality of Bragg grating elements wherein, the grating elements comprise a periodic or a quasiperiodic modulated microcrystalline and rigid silicon dioxide tetrahedral structure and a cladding disposed about the fiber core.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: February 26, 2008
    Assignee: General Electric Company
    Inventors: Hua Xai, Mahadevan Balasubramaniam, Jie Jiang, Huageng Luo, Abdul Rahman Abdallah Al-Khalidy, Clayton Ming Young, Kevin Thomas McCarthy
  • Patent number: 7333913
    Abstract: A clearance measurement system is provided. The clearance measurement system includes a reference geometry disposed on a first object having an otherwise continuous surface geometry and a sensor disposed on a second object, wherein the sensor is configured to generate a first signal representative of a first sensed parameter from the first object and a second signal representative of a second sensed parameter from the reference geometry. The clearance measurement system also includes a processing unit configured to process the first and second signals to estimate a clearance between the first and second objects based upon a measurement difference between the first and second sensed parameters.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: February 19, 2008
    Assignee: General Electric Company
    Inventors: Emad Andarawis Andarawis, Mahadevan Balasubramaniam, Todd Alan Anderson, Samhita Dasgupta, David Mulford Shaddock, Shobhana Mani, Jie Jiang
  • Patent number: 7180305
    Abstract: A technique for operating a sensor system is provided. The method includes exciting a first sensor with a first excitation signal at a first frequency and exciting a second sensor with a second excitation signal at a second frequency. The technique also includes combining a first measurement signal generated from the first sensor with a second measurement signal generated from the second sensor to determine a sensed parameter. The technique may be employed for reducing crosstalk between closely proximate sensors, such as capacitive probes, and may serve to determine distances within operating machines, such as turbine systems.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: February 20, 2007
    Assignee: General Electric Company
    Inventors: Emad Andarawis Andarawis, James Anthony Ruud, Samhita Dasgupta, Mahadevan Balasubramaniam, Charles Rickards
  • Publication number: 20070005294
    Abstract: A clearance measurement system is provided. The clearance measurement system includes a reference geometry disposed on a first object having an otherwise continuous surface geometry and a sensor disposed on a second object, wherein the sensor is configured to generate a first signal representative of a first sensed parameter from the first object and a second signal representative of a second sensed parameter from the reference geometry. The clearance measurement system also includes a processing unit configured to process the first and second signals to estimate a clearance between the first and second objects based upon a measurement difference between the first and second sensed parameters.
    Type: Application
    Filed: June 27, 2005
    Publication date: January 4, 2007
    Inventors: Emad Andarawis, Mahadevan Balasubramaniam, Todd Anderson, Samhita Dasgupta, David Shaddock, Shobhana Mani, Jie Jiang
  • Publication number: 20060239813
    Abstract: A clearance sensing system for a rotating machine includes a plurality of sensor probes disposed within a stationary shroud of the rotating machine. Each of the plurality of sensor probes is adapted to measure a parameter indicative of an axial and a radial displacement of a rotating component within the shroud and to produce a signal that corresponds to the parameter. In certain embodiments, this parameter may include a capacitance between the rotating component and the sensor probe. The clearance sensing system further includes a circuit that receives the signal from each of the plurality of sensor probes and determines (a) the axial displacement of the rotating component within the shroud and (b) a radial displacement of the rotating component relative to the shroud.
    Type: Application
    Filed: April 26, 2005
    Publication date: October 26, 2006
    Inventors: Minesh Shah, Mahadevan Balasubramaniam, Philip Beauchamp, Todd Anderson, Samhita Dasgupta, David Shaddock, Emad Andarawis
  • Patent number: 7116036
    Abstract: An energy harvesting device, system and method are described. The energy harvester collects acoustic energy and transforms it into electrical energy for use by a sensor. The energy harvester utilizes a piezoelectric device, which may be encased, either wholly or partially, within an acoustic chamber. Alternatively, the piezoelectric device may be entirely exterior to the acoustic chamber, which acts to amplify the collected acoustic energy.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: October 3, 2006
    Assignee: General Electric Company
    Inventors: Mahadevan Balasubramaniam, Jeffrey Bernard Fortin, Walter John Smith, Huageng Luo
  • Publication number: 20060132147
    Abstract: A system for measuring clearance between a first object and a second object is provided. The system includes a sensor configuration to generate a first signal representative of a first sensed parameter and a second signal representative of a second sensed parameter. The system also includes a clearance measurement unit configured to process the first and second signals based upon a ratiometric technique to calculate clearance between the first and second objects.
    Type: Application
    Filed: December 17, 2004
    Publication date: June 22, 2006
    Inventors: Mahadevan Balasubramaniam, Emad Andarawis, James Ruud, Samhita Dasgupta, Minesh Shah
  • Publication number: 20060125492
    Abstract: A technique for operating a sensor system is provided. The method includes exciting a first sensor with a first excitation signal at a first frequency and exciting a second sensor with a second excitation signal at a second frequency. The technique also includes combining a first measurement signal generated from the first sensor with a second measurement signal generated from the second sensor to determine a sensed parameter. The technique may be employed for reducing crosstalk between closely proximate sensors, such as capacitive probes, and may serve to determine distances within operating machines, such as turbine systems.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 15, 2006
    Inventors: Emad Andarawis, James Ruud, Samhita Dasgupta, Mahadevan Balasubramaniam, Charles Rickards
  • Publication number: 20060022555
    Abstract: An energy harvesting device, system and method are described. The energy harvester collects acoustic energy and transforms it into electrical energy for use by a sensor. The energy harvester utilizes a piezoelectric device, which may be encased, either wholly or partially, within an acoustic chamber. Alternatively, the piezoelectric device may be entirely exterior to the acoustic chamber, which acts to amplify the collected acoustic energy.
    Type: Application
    Filed: August 2, 2004
    Publication date: February 2, 2006
    Inventors: Mahadevan Balasubramaniam, Jeffrey Fortin, Walter Smith, Huageng Luo
  • Patent number: 6311100
    Abstract: A technique is provided for utilizing a computer system to generate tool paths for the computed aided machining (CAM) in at least four axis of a selected workpiece or part, particularly a complex part having hidden surfaces. The technique involves storing in the computer system both a surface point representation of a workpiece, which representation contains a unique code for each surface point, and a representation of the tool for which the paths are to be generated. The workpiece surface is viewed from a discrete number of orientations and a map of surface points visible from each of the orientations is generated. The map is then used to obtain selected most promising access directions for access to voxels in the delta volume to be removed or for access to surface points for a finishing operation. Such most promising access directions may for example be obtained by thinning an access cone for the voxel/point.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: October 30, 2001
    Assignee: Mass. Institute of Technology
    Inventors: Sanjay E. Sarma, Putta Laxmiprasad, Mahadevan Balasubramaniam