Patents by Inventor Vijayakumar Janardhan

Vijayakumar Janardhan 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: 8660758
    Abstract: The present disclosure is directed to a payload calculation system for use with a work implement having at least two linkage members. The payload calculation system may have at least one state sensor configured to measure a state of the at least two linkage members. The payload calculation system may also have a processing device in communication with the at least one state sensor. The processing device may account for changes in a center of gravity of each of the at least two linkage members. The processing device may also be configured to use the at least one state sensor to determine a mass of a payload moved by the work implement.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: February 25, 2014
    Assignee: Caterpillar Inc.
    Inventors: Vijayakumar Janardhan, Jeffrey Kent Berry, Brian Mintah, Everett Gene Brandt, Robert J. Price, Kevin Dwight King
  • Patent number: 8185290
    Abstract: A data acquisition system for an excavation machine having a power source configured to drive a tool through a work cycle is disclosed. The data acquisition system may have a first sensor associated with the power source to generate a first signal indicative of a performance of the power source, and a second sensor associated with the tool to generate a second signal indicative of a performance of the tool. The data acquisition system may also have a controller in communication with the first and second sensors. The controller may be configured to record the first and second signals, and partition the work cycle into a plurality of segments. The controller may be further configured to link the performance of the power source and the performance of the tool together with one of the plurality of segments during which the associated first and second signals were recorded.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: May 22, 2012
    Assignee: Caterpillar Inc.
    Inventors: Brian Mintah, Robert J. Price, Kevin D. King, Vijayakumar Janardhan, Shoji Tozawa
  • Patent number: 8156048
    Abstract: A payload monitoring system for an excavation machine is disclosed. The payload monitoring system may have a tool, a first sensor configured to generate a first signal indicative of a velocity of the tool, and a second sensor configured to generate a second signal indicative of a lift force of the tool. The payload monitoring system may also have a controller in communication with the first sensor and the second sensor. The controller may be configured to record the velocity and the lift force of the tool during a work cycle based on the first and second signals, and partition the work cycle into a plurality of segments including a loaded moving segment. The controller may also be configured to determine a period of time within the loaded moving segment during which the velocity of the tool is substantially constant, and calculate a payload of the tool based on the lift force recorded during the period of time.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: April 10, 2012
    Assignee: Caterpillar Inc.
    Inventors: Brian Mintah, Robert J. Price, Kevin D. King, Vijayakumar Janardhan, Shoji Tozawa
  • Patent number: 8024095
    Abstract: A control system for an excavation machine is disclosed. The control system may have a work tool movable to perform an excavation work cycle, at least one sensor configured to monitor a speed of the work tool and generate a signal indicative of the monitored speed, and a controller in communication with the at least one sensor. The controller may be configured to record the monitored speed of the work tool during each excavation work cycle, and compare the signal currently being generated to a maximum speed recorded for a previous excavation work cycle. The controller may be further configured to partition a current excavation work cycle into a plurality of segments based on the comparison.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: September 20, 2011
    Assignee: Caterpillar Inc.
    Inventors: Brian Mintah, Robert J. Price, Kevin D. King, Vijayakumar Janardhan, Shoji Tozawa, Srinivas Kowta, Parmesh Venkateswaran
  • Patent number: 7912612
    Abstract: The present disclosure is directed to a payload calculation system for use with a work implement. The payload calculation system may have a state sensor configured to measure a state of the work implement. The payload calculation system may further have a processing device configured to calculate a mass of a payload moved by the work implement. The processing device may be configured to use the measured state to compensate the calculation of the mass for centrifugal, inertial, and frictional forces of the work implement caused by the work implement rotating about a vertical pivot.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: March 22, 2011
    Assignee: Caterpillar Inc.
    Inventors: Vijayakumar Janardhan, Jeffrey Kent Berry, Brian Mintah, Everett Gene Brandt, Robert J. Price, Kevin Dwight King, Shoji Tozawa
  • Publication number: 20090228176
    Abstract: A data acquisition system for an excavation machine having a power source configured to drive a tool through a work cycle is disclosed. The data acquisition system may have a first sensor associated with the power source to generate a first signal indicative of a performance of the power source, and a second sensor associated with the tool to generate a second signal indicative of a performance of the tool. The data acquisition system may also have a controller in communication with the first and second sensors. The controller may be configured to record the first and second signals, and partition the work cycle into a plurality of segments. The controller may be further configured to link the performance of the power source and the performance of the tool together with one of the plurality of segments during which the associated first and second signals were recorded.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 10, 2009
    Inventors: Brian Mintah, Robert J. Price, Kevin D. King, Vijayakumar Janardhan, Shoji Tozawa
  • Publication number: 20090228394
    Abstract: A payload monitoring system for an excavation machine is disclosed. The payload monitoring system may have a tool, a first sensor configured to generate a first signal indicative of a velocity of the tool, and a second sensor configured to generate a second signal indicative of a lift force of the tool. The payload monitoring system may also have a controller in communication with the first sensor and the second sensor. The controller may be configured to record the velocity and the lift force of the tool during a work cycle based on the first and second signals, and partition the work cycle into a plurality of segments including a loaded moving segment. The controller may also be configured to determine a period of time within the loaded moving segment during which the velocity of the tool is substantially constant, and calculate a payload of the tool based on the lift force recorded during the period of time.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 10, 2009
    Inventors: Brian Mintah, Robert J. Price, Kevin D. King, Vijayakumar Janardhan, Shoji Tozawa
  • Publication number: 20090228177
    Abstract: A control system for an excavation machine is disclosed. The control system may have a work tool movable to perform an excavation work cycle, at least one sensor configured to monitor a speed of the work tool and generate a signal indicative of the monitored speed, and a controller in communication with the at least one sensor. The controller may be configured to record the monitored speed of the work tool during each excavation work cycle, and compare the signal currently being generated to a maximum speed recorded for a previous excavation work cycle. The controller may be further configured to partition a current excavation work cycle into a plurality of segments based on the comparison.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 10, 2009
    Inventors: Brian Mintah, Robert J. Price, Kevin D. King, Vijayakumar Janardhan, Shoji Tozawa, Srinivas Kowta, Parmesh Venkateswaran
  • Publication number: 20090139119
    Abstract: The present disclosure is directed to a payload calculation system for use with a work implement. The payload calculation system may have a state sensor configured to measure a state of the work implement. The payload calculation system may further have a processing device configured to calculate a mass of a payload moved by the work implement. The processing device may be configured to use the measured state to compensate the calculation of the mass for centrifugal, inertial, and frictional forces of the work implement caused by the work implement rotating about a vertical pivot.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 4, 2009
    Inventors: Vijayakumar Janardhan, Jeffrey Kent Berry, Brian Mintah, Everett Gene Brandt, Robert J. Price, Kevin Dwight King, Shoji Tozawa
  • Publication number: 20090143896
    Abstract: The present disclosure is directed to a payload calculation system for use with a work implement having at least two linkage members. The payload calculation system may have at least one state sensor configured to measure a state of the at least two linkage members. The payload calculation system may also have a processing device in communication with the at least one state sensor. The processing device may account for changes in a center of gravity of each of the at least two linkage members. The processing device may also be configured to use the at least one state sensor to determine a mass of a payload moved by the work implement.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 4, 2009
    Inventors: Vijayakumar Janardhan, Jeffrey Kent Berry, Brian Mintah, Everett Gene Brandt, Robert J. Price, Kevin Dwight King