Patents by Inventor Zhanping Xu

Zhanping Xu 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: 10215856
    Abstract: A method for determining whether a distance that a CW-TOF range camera provides for a scene is degraded by multipath interference (MPI) comprising operating the camera to determine a propagation phase delay and a phase delay coefficient for each of a plurality of modulation frequencies of light that illuminates the scene and using the phase delay coefficient and/or the phase delay to determine whether a distance provided by the camera is compromised by MPI.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: February 26, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Zhanping Xu
  • Publication number: 20190030495
    Abstract: A contacting device and method are presented for the collection, contacting, and distribution of fluids between particulate beds of a downflow vessel, which may operate in co-current flow. By one approach, the contacting device includes a liquid collection tray, a mixing channel in fluid communication with the liquid collection tray, and a liquid distribution zone.
    Type: Application
    Filed: July 13, 2018
    Publication date: January 31, 2019
    Inventors: Zhanping Xu, Christopher Naunheimer, Pengfei Chen, Peter H. Shafe, Steven J. Lesniak
  • Publication number: 20190001292
    Abstract: The present invention relates to an apparatus for gas-liquid distribution. More specifically, the present invention relates to a gas-liquid distribution device that may be used in an ionic liquid co-current gas and liquid up-flow reactor designed to distribute gas uniformly across the reactor cross section through restriction orifices on distributors located across the distribution tray.
    Type: Application
    Filed: June 21, 2018
    Publication date: January 3, 2019
    Inventors: Zhanping Xu, Daniel A. Kauff, Robert J. Sanger, Sathit Kulprathipanja, Emadoddin Abbasi
  • Patent number: 10159953
    Abstract: A combined heat exchanger and reactor for use with an ionic liquid catalyst reaction. The reactor includes an outer shell configured to receive a cooling fluid which may remove heat from reactions occurring within hollow members disposed inside of the outer shell. The hollow members preferably include one or more static mixers for mixing fluids and dispersing ionic liquid into droplets. A separation zone may be disposed beneath the hollow members which will separate the effluent and provide a hydrocarbon stream and an ionic liquid stream. Multiple combined heat exchanger and reactor may be arranged in series.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: December 25, 2018
    Assignee: UOP LLC
    Inventor: Zhanping Xu
  • Patent number: 10151838
    Abstract: Imaging sensors that detect infrared and visible light are provided herein. In one example, an imaging sensor is presented that includes a semiconductor substrate comprising an array of pixel structures for concurrently sensing infrared light and visible light. Each of the pixel structures include a first pixel element configured to detect the infrared light and a second pixel element configured to detect the visible light. Each of the pixel structures further include a shared output circuit that couples the first pixel element and the second pixel element such that a first output state presents a first signal corresponding to detected infrared light of the first pixel element and a second output state presents a second signal corresponding to detected visible light of the second pixel element.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: December 11, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Zhanping Xu
  • Publication number: 20180313955
    Abstract: A continuous wave time of flight (CW-TOF) camera operable to determine distances to features in a scene that are corrected for light that the camera transmits that is back scattered to a photosensor in the camera by structural features of the camera.
    Type: Application
    Filed: April 30, 2017
    Publication date: November 1, 2018
    Inventor: Zhanping Xu
  • Publication number: 20180292516
    Abstract: A continuous wave time of flight (CW-TOF) camera that modulates sensitivity of its photosensor during an exposure period at a frequency of modulation of structured light that the camera transmits to illuminate a scene that it images but phase shifted relative to phase of the transmitted light by a sampling phase offset modified by a sequence of N perturbation phase shifts ?n=2?(n?1)/N, (1?n?N), and modifies the structured light in synchrony with the sequence of perturbation phase shifts to reduce error due to multipath interference in determining distances to features in the scene.
    Type: Application
    Filed: April 6, 2017
    Publication date: October 11, 2018
    Inventor: Zhanping Xu
  • Publication number: 20180264431
    Abstract: Reactor systems for use with ionic liquid catalyst. The reactor systems include one or more stages, which include a reactor and a heat exchanger, and a separation zone. The reactor and the heat exchanger may have a vertical orientation. Additionally, a separation vessel may also include a vertical orientation. The heat exchanger may allow for linear flow of process fluid to control residence time.
    Type: Application
    Filed: May 23, 2018
    Publication date: September 20, 2018
    Inventors: Eric Leeton, Kurt Detrick, Christian D. Freet, David S. Lafyatis, Robert Mehlberg, Sean G. Mueller, Gregory J. Schrad, Zhanping Xu
  • Publication number: 20180128560
    Abstract: Processes for controlling the rate and temperature of cooling fluid through a heat exchange zone in, for example, an alkylation reactor using an ionic liquid catalyst. A cooling fluid system may be used to provide the cooling fluid which includes a chiller and a reservoir. The cooling fluid may pass from the reservoir through the heat exchange zone. A bypass line may be used to pass a portion of the cooling fluid around the heat exchange zone. The amount of cooling fluid may be adjusted, with a valve, based upon the temperature of the cooled process fluid flowing out of the heat exchange zone. Some of the cooling fluid from the chiller may be circulated back to the chiller in a chiller loop.
    Type: Application
    Filed: December 15, 2017
    Publication date: May 10, 2018
    Inventors: Gregory J. Schrad, James G. Hagen, Sean G. Mueller, Trung Pham, Zhanping Xu
  • Patent number: 9950970
    Abstract: An ionic liquid reactor and a process for controlling heat generation from an ionic liquid reactor unit. The ionic liquid reactor includes an internal heat exchanger. Impellers break the ionic liquid into small droplets to ensure reactions and mix the fluids to ensure reactions and enhance heat exchanger. Baffles may be used to direct the flow of the fluids within the reactor.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: April 24, 2018
    Assignee: UOP LLC
    Inventor: Zhanping Xu
  • Publication number: 20180106535
    Abstract: A reboiler in fluid communication with a fractionator column in an offshore low temperature process removing carbon dioxide from natural gas has a vessel volume. A carbon steel tubing bundle is disposed within the vessel volume. Each tube in the bundle has an outer surface with a porous granular metal layer deposited thereon. The granular metal layer comprises a pore size distribution which promotes bubble nucleation during vaporization of a nearly pure liquid carbon dioxide stream.
    Type: Application
    Filed: December 19, 2017
    Publication date: April 19, 2018
    Inventors: Lubo Zhou, Thomas J. Godry, Zhanping Xu
  • Patent number: 9815049
    Abstract: A method of controlling a hydrocarbon conversion process is described. The method involves introducing a reactant into a reaction zone containing an ionic liquid catalyst. The reaction zone has at least two zones. The mass transfer resistance in the second zone is greater than the mass transfer resistance in the first zone.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: November 14, 2017
    Assignee: UOP LLC
    Inventors: David S. Lafyatis, Sean G. Mueller, Zhanping Xu, Douglas A. Nafis, Robert Mehlberg, Kurt Detrick, Avram M. Buchbinder
  • Patent number: 9702976
    Abstract: A CW-TOF camera that uses a piecewise constant or linear discretized indicator function of first and second modulation frequencies of light that the camera transmits to illuminate a scene and a round trip time tR for light from and back to the camera for features in the scene to disambiguate wrapped phase shifts that the camera acquires for the features.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: July 11, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Zhanping Xu, Travis Perry
  • Publication number: 20170189884
    Abstract: A combined heat exchanger and reactor for use with an ionic liquid catalyst reaction. The reactor includes an outer shell configured to receive a cooling fluid which may remove heat from reactions occurring within hollow members disposed inside of the outer shell. The hollow members preferably include one or more static mixers for mixing fluids and dispersing ionic liquid into droplets. A separation zone may be disposed beneath the hollow members which will separate the effluent and provide a hydrocarbon stream and an ionic liquid stream. Multiple combined heat exchanger and reactor may be arranged in series.
    Type: Application
    Filed: November 8, 2016
    Publication date: July 6, 2017
    Inventor: Zhanping Xu
  • Patent number: 9669377
    Abstract: An ionic liquid reactor unit and a process for controlling heat generation from an ionic liquid reactor unit. The ionic liquid reactor unit may include an external heat exchanger. The effluent from the reactor is separated in a separation zone allowing the hydrocarbon phase to transfer heat to a cooling fluid. The heat exchanger may be a tube-in-shell, a spiral plate heat exchanger, a hair pin heat exchanger. The heat exchanger accommodates the separation of the ionic liquid from the hydrocarbon phase, and may allow for the ion liquid to be drained.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: June 6, 2017
    Assignee: UOP LLC
    Inventors: Zhanping Xu, James Hagen, Sanford A. Victor, Phillip F. Daly, Kurt Detrick
  • Publication number: 20170144141
    Abstract: A method of controlling a hydrocarbon conversion process is described. The method involves introducing a reactant into a reaction zone containing an ionic liquid catalyst. The reaction zone has at least two zones. The mass transfer resistance in the second zone is greater than the mass transfer resistance in the first zone.
    Type: Application
    Filed: October 21, 2016
    Publication date: May 25, 2017
    Inventors: David S. Lafyatis, Sean G. Mueller, Zhanping Xu, Douglas A. Nafis, Robert Mehlberg, Kurt Detrick, Avram M. Buchbinder
  • Publication number: 20170146657
    Abstract: Imaging sensors that detect infrared and visible light are provided herein. In one example, an imaging sensor is presented that includes a semiconductor substrate comprising an array of pixel structures for concurrently sensing infrared light and visible light. Each of the pixel structures include a first pixel element configured to detect the infrared light and a second pixel element configured to detect the visible light. Each of the pixel structures further include a shared output circuit that couples the first pixel element and the second pixel element such that a first output state presents a first signal corresponding to detected infrared light of the first pixel element and a second output state presents a second signal corresponding to detected visible light of the second pixel element.
    Type: Application
    Filed: November 24, 2015
    Publication date: May 25, 2017
    Inventor: Zhanping Xu
  • Patent number: 9566559
    Abstract: A fluid distribution device is presented for the collection and distribution of fluid between reactor beds. According to various aspects, the device includes a collection tray, a mixing chamber in fluid communication with the collection tray, a rough distribution tray in fluid communication with the mixing chamber, and a fine distribution tray in fluid communication with the rough distribution tray. The rough distribution tray includes a vapor chimney.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: February 14, 2017
    Assignee: UOP LLC
    Inventors: Zhanping Xu, Pengfei Chen
  • Publication number: 20160367908
    Abstract: A separation column and a process for using same to separate a hydrocarbon or chemical mixture into at least a vapor stream and a liquid stream. The separation column includes an internal heat exchanger. The heat exchanger has a plurality of fins which allow for heat and mass transfer by including apertures. The fins may include louvers or perforations associated with the apertures to increase radial flow and permit fluids to flow through the fins. The heat exchanger may be used to supply heat to the column, remove heat from the column, or both.
    Type: Application
    Filed: May 3, 2016
    Publication date: December 22, 2016
    Inventor: Zhanping Xu
  • Patent number: 9497440
    Abstract: An imager includes an emitter, an array of pixel elements, and driver logic. The emitter releases bursts of light pulses with pauses between bursts. Each element of the array has a finger gate biasable to attract charge to the surface, a reading node to collect the charge, and a transfer gate to admit such charge to the reading node and to deter such charge from being absorbed into the finger gate. The driver logic biases the finger gates with the modulated light pulses such that the finger gates of adjacent first and second elements cycle with unequal phase into and out of a charge-attracting state. To reduce the effects of ambient light on the imager, the driver logic is configured to bias the transfer gates so that the charge is admitted to the reading node only during the bursts and is prevented from reaching the reading node during the pauses.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: November 15, 2016
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Cyrus Bamji, Tamer Elkhatib, Swati Mehta, Zhanping Xu