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Kefeng Zeng

age ~49

from West Deptford, NJ

Also known as:
  • Keteng Zeng
  • Kefeng Zhang
  • Zeng Kefeng

Kefeng Zeng Phones & Addresses

  • West Deptford, NJ
  • Boalsburg, PA
  • Gloucester, NJ
  • State College, PA
  • 5 Highbridge Ln, West Deptford, NJ 08086

Work

  • Company:
    Checkpoint systems
    Feb 2012
  • Position:
    Principal antenna engineer

Education

  • Degree:
    Ph.D.
  • School / High School:
    Penn State University
    2001 to 2004
  • Specialities:
    Electrical Engineering

Industries

Electrical/Electronic Manufacturing

Resumes

Kefeng Zeng Photo 1

Principal Antenna Engineer At Checkpoint Systems

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Position:
Principal Antenna Engineer at Checkpoint Systems
Location:
Greater Philadelphia Area
Industry:
Electrical/Electronic Manufacturing
Work:
Checkpoint Systems since Feb 2012
Principal Antenna Engineer

Checkpoint Systems May 2006 - Jan 2012
Senior Antenna Engineer

Sentech Corporation Aug 2004 - Apr 2006
Senior Research Scientist

The First Research Institute of Ministry of Public Security, Beijing, China Jun 1995 - Apr 1999
Electronics Engineer
Education:
Penn State University 2001 - 2004
Ph.D., Electrical Engineering
The National University of Singapore 1999 - 2001
Master, Electrical Engineering
Huazhong University of Science and Technology 1991 - 1995
Bachelor, Electronics and Information Engineering

Us Patents

  • Impedance Analysis Technique For Frequency Domain Characterization Of Magnetoelastic Sensor Element By Measuring Steady-State Vibration Of Element While Undergoing Constant Sine-Wave Excitation

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  • US Patent:
    7912661, Mar 22, 2011
  • Filed:
    Feb 23, 2007
  • Appl. No.:
    11/710294
  • Inventors:
    Kefeng Zeng - Mantua NJ,
    Keat Ghee Ong - Houghton MI,
    Xiping Yang - Dallas TX,
    Craig A. Grimes - Boalsburg PA,
  • Assignee:
    KMG2 Sensors Corporation - Boalsburg PA
  • International Classification:
    G01R 23/16
  • US Classification:
    702 76, 702 56, 702189, 324 7611, 324600
  • Abstract:
    Circuitry and program code adapted for carrying out an associated technique for characterizing the response of one or more magnetoelastic sensor elements during exposure to an excitation field generated by an interrogation coil: including: (a) measuring a total sensor signal from the coil with the sensor element positioned within the excitation field within a spacing created by a winding of the coil; and (b) automatically determining: (i) a total measured impedance spectrum from said total sensor signal so measured, and (ii) a plurality of magnitude values representing the real part of a reconstructed impedance spectrum for the sensor element. The reconstructed impedance spectrum for the sensor element, having been calculated by subtracting an impedance generally attributable to the coil during the time an AC excitation signal is provided, from the total measured impedance. Subtraction of coil impedance from total complex impedance is accomplished by separate subtraction of the real part and of the imaginary part, represented as follows (ω)]=(ω)]−(ω)]  Equation (12) and (ω)]=(ω)]−(ω)]  Equation (13) where subscript “t” indicates total complex impedance, “s” indicates sensor element impedance, and “c” indicates coil impedance.
  • Dynamic Eas Detection System And Method

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  • US Patent:
    8587489, Nov 19, 2013
  • Filed:
    Jun 6, 2008
  • Appl. No.:
    12/134827
  • Inventors:
    Harry Oung - Cherry Hill NJ,
    Kefeng Zeng - Mantua NJ,
  • Assignee:
    Checkpoint Systems, Inc. - Thorofare NJ
  • International Classification:
    H01Q 7/08
    H01Q 11/18
    H01Q 21/00
    G08B 13/22
  • US Classification:
    343742, 343788, 343867, 3405727
  • Abstract:
    This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve security tag detection. In particular, the individual frequency and phase of the plurality of the transmit/receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. It is the object of this invention to achieve the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation.
  • Technique And Electronic Circuitry For Quantifying A Transient Signal Using Threshold-Crossing Counting To Track Signal Amplitude

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  • US Patent:
    20060064259, Mar 23, 2006
  • Filed:
    Sep 8, 2004
  • Appl. No.:
    10/936125
  • Inventors:
    Kefeng Zeng - State College PA,
    Keat Ong - State College PA,
    Craig Grimes - Boalsburg PA,
  • International Classification:
    G06F 19/00
  • US Classification:
    702070000
  • Abstract:
    Circuitry adapted for carrying out associated techniques for: (a) calculating a damping factor, e.g., a damping ratio represented by ζ, or a quality factor Q, where ζ≈1/2Q, for a transient signal received, having been emitted from a resonator-type sensor element; (b) determining amplitude, A, of the transient signal; or (c) generating a frequency response dataset of interrelated points for the transient signal. A threshold comparison circuit is included for converting the transient signal received into a first and second digital waveform; the first digital waveform represents cycle crossings of the transient signal associated with a first threshold value, and the second digital waveform represents cycle crossings of the transient signal associated with a second threshold value. The transient signal may be converted, likewise, into third, and so on, digital waveforms, whereby the third digital waveform represents cycle crossings of the transient signal associated with a third threshold value. Respective digital counters are included, each of which is adapted for determining a total number of cycles of the first, second, third, and so on, digital waveform. A processing unit of suitable speed and capacity is employed for the calculating of the damping factor, determining an amplitude, and/or generating a frequency response dataset.
  • System/Unit And Method Employing A Plurality Of Magnetoelastic Sensor Elements For Automatically Quantifying Parameters Of Whole Blood And Platelet-Rich Plasma

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  • US Patent:
    20080261261, Oct 23, 2008
  • Filed:
    Apr 2, 2008
  • Appl. No.:
    12/080472
  • Inventors:
    Craig A. Grimes - Boalsburg PA,
    Kefeng Zeng - Mantua NJ,
    Keat Ghee Ong - Houghton MI,
    Xiping Yang - Dallas TX,
  • International Classification:
    C12Q 1/02
    C12M 1/00
  • US Classification:
    435 29, 4352871
  • Abstract:
    A system/analyzer-unit and method/platform—using information obtained from at least one, adapted for a plurality of, magnetoelastic sensor elements in contact with one or more samples comprising blood from a patient—for automatically quantifying one or more parameters of the patient's blood. Information obtained from emissions measured from each of the sensor elements is uniquely processed to determine a quantification about the patient's blood, such as, quantifying platelet aggregation to determine platelet contribution toward clot formation; quantifying fibrin network contribution toward clot formation; quantifying platelet-fibrin clot interactions; quantifying kinetics of thrombin clot generation; quantifying platelet-fibrin clot strength; and so on. Structural aspects of the analyzer-unit include: a cartridge having at least one bay within which a sensor element is positioned; each bay in fluid communication with both (a) an entry port for injecting a first blood sample composed of blood taken from the patient (human or other mammal), and (b) a gas vent through which air displaced by injecting the first blood sample into the bay.
  • Phase Coupler For Rotating Fields

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  • US Patent:
    20090261976, Oct 22, 2009
  • Filed:
    Apr 30, 2009
  • Appl. No.:
    12/433375
  • Inventors:
    Harry Oung - Cherry Hill NJ,
    Kefeng Zeng - Mantua NJ,
  • Assignee:
    Checkpoint Systems, Inc. - Thorofare NJ
  • International Classification:
    G08B 13/22
  • US Classification:
    3405722
  • Abstract:
    This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve detection. In particular, the individual frequency and phase of the plurality of the transmit/receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. The invention achieves the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation while using single transmission drivers to drive entire antenna structures, whether loop antenna or ferrite core antenna, using a phase coupler, thereby allowing more efficient system operation or additional features such as deactivator antenna operation.
  • Point Of Entry Deactivation

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  • US Patent:
    20120212343, Aug 23, 2012
  • Filed:
    Feb 17, 2012
  • Appl. No.:
    13/399091
  • Inventors:
    Lothar Grunenberg - Heppenheim,
    Nimesh Shah - Marlton NJ,
    Kefeng Zeng - West Deptford NJ,
  • Assignee:
    CHECKPOINT SYSTEMS, INC. - Philadelphia PA
  • International Classification:
    G08B 13/14
    G06K 7/01
  • US Classification:
    3405723, 340 105
  • Abstract:
    A system and method for automatically deactivating a security tag upon entry into business establishment to prevent tag pollution. The system and method involve positioning a security tag deactivator at an entrance of a business establishment and emitting an EM field sufficient to deactivate any security tag that enters into the business establishment.

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