Patents by Inventor James Feng Sun

James Feng Sun 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).

  • Inductive sensing systems and methods based on multiple frequencies
    Patent number: 9780780
    Abstract: A target detection system may include a power supply and an inductor capacitor (LC) tank circuit. The LC tank circuit may include a sensing coil, a first tank capacitor, and a second tank capacitor. Further, the LC tank circuit may alternate between the first tank capacitor and the second tank capacitor, and the power supply may power the LC tank circuit. The target detection system may further include measurement circuitry to measure a first decay characteristic of a first set of free oscillations from the first tank capacitor and a second decay characteristic of a second set of free oscillations from the second tank capacitor. Additionally, the target detection system may also include processing circuitry to compare the first decay characteristic to the second decay characteristic to determine a presence and a distance of a target.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: October 3, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: James Feng Sun, Frederic Boutaud
  • INDUCTIVE SENSING SYSTEMS AND METHODS BASED ON MULTIPLE FREQUENCIES
    Publication number: 20160054153
    Abstract: A target detection system may include a power supply and an inductor capacitor (LC) tank circuit. The LC tank circuit may include a sensing coil, a first tank capacitor, and a second tank capacitor. Further, the LC tank circuit may alternate between the first tank capacitor and the second tank capacitor, and the power supply may power the LC tank circuit. The target detection system may further include measurement circuitry to measure a first decay characteristic of a first set of free oscillations from the first tank capacitor and a second decay characteristic of a second set of free oscillations from the second tank capacitor. Additionally, the target detection system may also include processing circuitry to compare the first decay characteristic to the second decay characteristic to determine a presence and a distance of a target.
    Type: Application
    Filed: August 22, 2014
    Publication date: February 25, 2016
    Inventors: James Feng Sun, Frederic Boutaud