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: 10928489
    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: Grant
    Filed: April 6, 2017
    Date of Patent: February 23, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Zhanping Xu
  • Publication number: 20210033731
    Abstract: Adaptive phase unwrapping for a time-of-flight camera. A scene is illuminated with modulation light having two or more frequencies that do not have a common integer denominator. The modulation light that is reflected off objects within the scene is received at a sensor array. The received modulation light is then processed and weighted in the complex domain to determine unwrapped phases for each of the two or more frequencies of modulation light.
    Type: Application
    Filed: July 31, 2019
    Publication date: February 4, 2021
    Applicant: Microsoft Technology Licensing, LLC
    Inventor: Zhanping XU
  • Patent number: 10901087
    Abstract: A method of determining distances to features in a scene comprising transmitting structured light modulated at a modulation frequency to illuminate the scene with a structured illumination pattern and for each combination of a sampling phase offset ?k and a perturbation phase shift ?n, modulating sensitivity of a photo sensor at the frequency of modulation of the transmitted light, but phase shifted relative to phase of the transmitted light by a phase ?k,n=(?k+?n), and for each value of ?k,n modulo 360°, registering light reflected by features in the scene during a different exposure and using the registered light to provide a range image of the scene.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: January 26, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Zhanping Xu
  • Patent number: 10828616
    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: Grant
    Filed: July 13, 2018
    Date of Patent: November 10, 2020
    Assignee: UOP LLC
    Inventors: Zhanping Xu, Christopher Naunheimer, Pengfei Chen, Steven J. Lesniak
  • Patent number: 10809022
    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: Grant
    Filed: December 15, 2017
    Date of Patent: October 20, 2020
    Assignee: UOP LLC
    Inventors: Gregory J. Schrad, James G. Hagen, Sean G. Mueller, Trung Pham, Zhanping Xu
  • Patent number: 10722861
    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: Grant
    Filed: May 23, 2018
    Date of Patent: July 28, 2020
    Assignee: UOP LLC
    Inventors: Eric Leeton, Kurt Detrick, Christian D. Freet, David S. Lafyatis, Robert Mehlberg, Sean G. Mueller, Gregory J. Schrad, Zhanping Xu
  • Patent number: 10668442
    Abstract: The hydroprocessing reactor internals (HRI) have reduced height compared to standard HRI designs. The HRI height reduction is achieved by a more open design of a rough liquid distribution tray so that the required spaces above and below the tray for vapor flow are reduced. The hydroprocessing reactor quench zone internals comprise a collection tray, a rough liquid distribution tray, and a vapor-liquid distribution tray. Fluid mixing occurs above both the collection tray and the rough liquid distribution tray.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: June 2, 2020
    Assignee: UOP LLC
    Inventor: Zhanping Xu
  • Publication number: 20200116862
    Abstract: A three-dimensional time-of-flight (TOF) RGB-IR image sensor is provided, including a signal generator configured to generate a modulated electrical signal. The three-dimensional TOF RGB-IR image sensor may further include a light-emitting diode (LED) configured to receive the modulated electrical signal and emit modulated light. The three-dimensional TOF RGB-IR image sensor may further include a TOF sensor integrated circuit configured to receive light at the light-receiving surface and generate a photoelectrical signal based on the received light. The received light may include ambient light and reflected modulated light. The three-dimensional TOF RGB-IR image sensor may further include a filter array located on the light-receiving surface of the TOF sensor integrated circuit.
    Type: Application
    Filed: October 12, 2018
    Publication date: April 16, 2020
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Zhanping XU, Vei-Han CHAN, Sunil Prakash ACHARYA
  • Patent number: 10596498
    Abstract: Separation processes and separation apparatus are described. The process includes introducing a stream of liquid containing dispersed droplets of another liquid into a separation apparatus comprising a vessel having at least one mesh screen covering substantially all of the cross-section of the vessel. The mesh screen is periodically slightly moved so that the wires of the mesh screen contact the dispersed droplets and some of the dispersed droplets coalesce on the wires. The coalesced droplets rise or fall from the wires through the stream of the second liquid. The coalesced droplets are collected in a portion of the vessel. A stream of the second liquid having a reduced level of dispersed droplets is recovered.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: March 24, 2020
    Assignee: UOP LLC
    Inventors: Pengfei Chen, Zhanping Xu, Xiaoming Wen
  • Patent number: 10589244
    Abstract: The hydroprocessing reactor internals (HRI) have reduced height compared to standard HRI designs. In this design, HRI height reduction is achieved by placing a mixing chamber above the collection tray. A ring quench distributor is located around the fluid collection tray between the mixing chamber and reactor shell to eliminate the vertical space occupied by the distributor. The hydroprocessing reactor quench zone internals comprise a collection tray, a mixing chamber, a ring distributor, a rough liquid distribution tray, and a vapor-liquid distribution tray. Fluid mixing occurs in the mixing chamber and above the rough liquid distribution tray.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: March 17, 2020
    Assignee: UOP LLC
    Inventor: Zhanping Xu
  • Patent number: 10576439
    Abstract: The invention involves a scale collection device that is located within downflow reactor head for removing solids from feed streams to increase reactor operating cycle time without impact on effective reactor space for catalyst loading. More particularly, a filtering zone is located in an upper portion of a reactor vessel above a rough liquid distribution tray and a distribution tray.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: March 3, 2020
    Assignee: UOP LLC
    Inventor: Zhanping Xu
  • Patent number: 10571572
    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: January 10, 2019
    Date of Patent: February 25, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Zhanping Xu
  • Patent number: 10556212
    Abstract: The invention involves a scale collection device that is located within downflow reactor head for removing solids from feed streams to increase reactor operating cycle time without impact on effective reactor space for catalyst loading and reactor pressure drop. More particularly, a scale collection device is located in an upper portion of a reactor vessel above a rough liquid distribution tray and a vapor-liquid distribution tray.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: February 11, 2020
    Assignee: UOP LLC
    Inventors: Zhanping Xu, Pengfei Chen, Robert L. Bunting, Jr.
  • Patent number: 10549249
    Abstract: The invention involves a scale collection device that is located within downflow reactor head for removing solids from feed streams to increase reactor operating cycle time without impact on effective reactor space for catalyst loading. More particularly, a filtering zone is located in an upper portion of a reactor vessel above a rough liquid distribution tray and a distribution tray.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: February 4, 2020
    Assignee: UOP LLC
    Inventors: Zhanping Xu, Steven J. Lesniak, Robert L. Bunting, Jr.
  • Patent number: 10537866
    Abstract: The invention involves a scale collection device that is located within downflow reactor head for removing solids from feed streams to increase reactor operating cycle time without impact on effective reactor space for catalyst loading. More particularly, a filtering zone is located in an upper portion of a reactor vessel above a rough liquid distribution tray and a distribution tray.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: January 21, 2020
    Assignee: UOP LLC
    Inventors: Robert L. Bunting, Jr., Steven J. Lesniak, Zhanping Xu
  • Patent number: 10518235
    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: Grant
    Filed: July 16, 2018
    Date of Patent: December 31, 2019
    Assignee: UOP LLC
    Inventors: Zhanping Xu, Christopher Naunheimer, Pengfei Chen
  • Patent number: 10486127
    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: Grant
    Filed: July 16, 2018
    Date of Patent: November 26, 2019
    Assignee: UOP LLC
    Inventors: Zhanping Xu, Christopher Naunheimer, Pengfei Chen, Peter H. Shafe
  • Patent number: 10451741
    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: Grant
    Filed: April 30, 2017
    Date of Patent: October 22, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Zhanping Xu
  • Publication number: 20190317212
    Abstract: A range camera operable to provide a range image of a scene and a picture of the scene, based on non-visible light and visible light registered for features in the scene on a same photosensor.
    Type: Application
    Filed: April 11, 2018
    Publication date: October 17, 2019
    Inventors: Zhanping Xu, Abdelrehim Ahmed
  • Patent number: 10441932
    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: Grant
    Filed: June 21, 2018
    Date of Patent: October 15, 2019
    Assignee: UOP LLC
    Inventors: Zhanping Xu, Daniel A. Kauff, Robert J. Sanger, Sathit Kulprathipanja, Emadoddin Abbasi