Patents by Inventor Zhijun Cai

Zhijun Cai 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: 11499547
    Abstract: A hydraulic fracturing machine includes a pump failure detection system. The hydraulic fracturing machine includes a hydraulic fracturing pump with a power end and a fluid end. The power end includes a plurality of roller bearings, and the fluid end includes a flow of fluid. A particle sensor coupled to the power end is configured to transmit particle information regarding a quantity of particles in the fluid. A temperature sensor, also coupled to the power end, is configured to transmit temperature information regarding a temperature of the fluid. A vibration sensor coupled to the power end is configured to transmit vibration information regarding a vibration of each of the plurality of roller bearings. An electronic control module analyzes the particle information, the temperature information and the vibration information, and calculates a failure warning level based on the analysis.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: November 15, 2022
    Assignee: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Nathan S. Pauli, Zhaoxu Dong, Yong Sun, Xuefei Hu
  • Patent number: 11495936
    Abstract: An optical amplifier assembly and a detection method capable of dynamically performing optical time-domain reflection detection. The detection method comprises obtaining signal light intensity detection signals from a first and second photodetectors and sending a control signal to an L-band Raman pump when the signal light intensity in the second photodetector is lower than a first preset threshold, so that the L-band Raman pump enters into an optical time-domain reflection detection mode; sending a control signal to the L-band Raman pump when the signal light intensity in the second photodetector is greater than or equal the first preset threshold, so that the L-band Raman pump enters into an L-Band Raman optical fiber amplifier operation mode.
    Type: Grant
    Filed: December 25, 2017
    Date of Patent: November 8, 2022
    Inventors: Zhenyu Yu, Qinlian Bu, Chengpeng Fu, Zhijun Ye, Fei Liu, Fuxing Deng, Rui Lei, Xiao Cai
  • Publication number: 20220312356
    Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.
    Type: Application
    Filed: June 13, 2022
    Publication date: September 29, 2022
    Inventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Patent number: 11428704
    Abstract: A system and method for protecting a genset from pole slip is disclosed. The system may comprise a generator, a prime mover and a controller. The generator includes a stator and a rotor. The prime mover is configured to drive rotation of the rotor. The controller may be configured to: determine mechanical status of the generator based on data associated with a translational displacement of the rotor; determine electrical status of the generator based on (a) a load angle or (b) the load angle and a rate of change of the load angle associated with rotation of the rotor in the stator; determine an operating condition of the generator based on fusion of the mechanical status and the electrical status; if the operating condition is a pole-slip-warning, activate an output member to display or emit a warning; and, if the operating condition is a pole-slip, activate a protective action.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: August 30, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Yanchai Zhang, Wenming Zhao, Yong Sun, Xuefei Hu, Eric Wayne Ohlson, Suresh Baddam Reddy
  • Patent number: 11389953
    Abstract: A construction system includes an excavator having a hydraulically controlled linkage and a hydraulic robot. The hydraulic robot includes a plurality of arms extending from a base, each arm having a hydraulic motor. The hydraulic robot further includes a robot control system directing movement of the plurality of arms and an end effector platform movable by rotation of the arms.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: July 19, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Daniel P. Sergison, Daniel J. Martinez, Corey L. Gorman, Rustin G. Metzger, Eric A. Reiners
  • Patent number: 11395248
    Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: July 19, 2022
    Assignee: BlackBerry Limited
    Inventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Publication number: 20220215374
    Abstract: The embodiments of the application disclose a payment method, apparatus, device, system and storage medium. In the method, a target graphic identifier through the first application app is identified to obtain the first address; wherein, the first app is one of multiple optional apps, and the optional apps comprise apps with payment functions and apps without payment functions; order confirmation information is sent to the first server based on the first page corresponding to the first address; the second address corresponding to an unified payment gateway fed back by the first server is received; a payment component to pay for the order based on the second page corresponding to the second address is called. A payment method, apparatus, device, system and storage medium in embodiments of the application can reduce interface cost, improve payment efficiency, and users can complete payment by scanning codes using any app.
    Type: Application
    Filed: March 24, 2020
    Publication date: July 7, 2022
    Inventors: Zhijun Lu, Haijian Jiang, Qing Min, Lilin Wang, Hua Cai, Zheng Zhang
  • Publication number: 20220207513
    Abstract: The present invention relates to a method and a system for integrated payment. The method for integrated payment includes: receiving, from a user terminal, a first access request corresponding to payment information; generating redirection address information on the basis of the first access request; and transmitting the redirection address information to the user terminal; wherein the redirection address information comprises jump target information and order information corresponding to a transaction order to be paid.
    Type: Application
    Filed: March 25, 2020
    Publication date: June 30, 2022
    Applicant: CHINA UNIONPAY CO., LTD.
    Inventors: Zhijun LU, Haijian JIANG, Lilin WANG, Hua CAI, Qing MIN, Zheng ZHANG
  • Publication number: 20220190994
    Abstract: A method and apparatus for dynamic acknowledgement repetition for a downlink medium access control packet data unit transmission ‘MAC PDU’ requiring multiple acknowledgements, the method having the steps of: receiving the downlink MAC PDU requiring multiple acknowledgements; and utilizing a differentiating factor and acknowledgement scheme, sending the multiple acknowledgements.
    Type: Application
    Filed: March 3, 2022
    Publication date: June 16, 2022
    Applicant: BlackBerry Limited
    Inventors: Takashi SUZUKI, Zhijun CAI, James Earl WOMACK
  • Publication number: 20220178235
    Abstract: An automated hydraulic fracturing system and method for controlling various aspects of a fracking operation is disclosed. A master controller receives various operating parameters, such as desired operating conditions, information about a fracking site, information about trailers and/or other equipment at the fracking site, and/or sensor signals. The master controller may access one or more trailer model(s) that model various parameters of equipment (e.g., engines, transmissions, pumps, trailers, etc.) at the fracking site as a function of controlled operating conditions. The master controller uses the trailer models in conjunction with operating parameters to generate control signals that automatically control the various equipment at the fracking site to optimize various desired outcomes, such as reduced operating costs, reduced emissions, reduced idle time, increased efficiency, etc.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 9, 2022
    Applicant: Caterpillar Inc.
    Inventors: Yanchai Zhang, Zhijun Cai, Perry Dwain Converse, Erik L. Olsen, Casey Alan Otten
  • Patent number: 11337185
    Abstract: Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: May 17, 2022
    Assignee: BlackBerry Limited
    Inventors: Hua Xu, Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Mo-Han Fong, Sean Michael McBeath, Robert Mark Harrison
  • Patent number: 11283577
    Abstract: A method and apparatus for dynamic acknowledgement repetition for a downlink medium access control packet data unit transmission ‘MAC PDU’ requiring multiple acknowledgements, the method having the steps of: receiving the downlink MAC PDU requiring multiple acknowledgements; and utilizing a differentiating factor and acknowledgement scheme, sending the multiple acknowledgements.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: March 22, 2022
    Assignee: BlackBerry Limited
    Inventors: Takashi Suzuki, Zhijun Cai, James Earl Womack
  • Publication number: 20220061028
    Abstract: A system and method are disclosed that allows for uplink resource reuse. A user device is provided an uplink resource for a first data type. If the user device does not have enough data of the first data type to fill the granted uplink resource, the user device fills the granted uplink resource with a second data type.
    Type: Application
    Filed: September 2, 2021
    Publication date: February 24, 2022
    Inventors: Zhijun Cai, Sean Bartholomew Simmons, James Earl Womack, Takashi Suzuki, Yi Yu
  • Patent number: 11251620
    Abstract: A device may receive a power demand for a load and a weather forecast for a time period. The device may determine a first supply of power available from a photo-voltaic (PV) installation for the time period based on the weather forecast. The device may determine a power deficit for the time period based on the power demand and the first supply of power. The device may determine a first cost associated with utilizing a second supply of power available from a battery and a second cost associated with utilizing a third supply of power available from an engine for the time period. The device may determine a power source to overcome the power deficit based on the first cost and the second cost and may cause the PV installation and the power source to supply power to satisfy the power demand for the load.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: February 15, 2022
    Assignee: Caterpillar Inc.
    Inventors: Zhijun Cai, Yanchai Zhang
  • Publication number: 20220007343
    Abstract: A method and system to signal transmission layers or dedicated reference signal ports to be used in a multiple input multiple output system, the method including providing a downlink control signal containing information for transmission layers or dedicated reference signal ports utilized, the dedicated reference signal ports being associated with the transmission layers; and using the information to demodulate data on each transmission layer.
    Type: Application
    Filed: June 10, 2021
    Publication date: January 6, 2022
    Applicant: BlackBerry Limited
    Inventors: Zhijun Cai, Sean Michael McBeath, Hua Xu, Yongkang Jia, Youn Hyoung Heo, Andrew Mark Earnshaw, Mo-Han Fong, Robert Mark Harrison
  • Publication number: 20210392599
    Abstract: A radio access network sends, to a mobile device, information indicating a cell on a first carrier of a first type and a cell on a second carrier of a second type, and sends, to the mobile device, configuration information regarding whether the mobile device is to connect with a cell on another carrier of a new carrier type. The radio access network sends, to the mobile device, information relating to a Discontinuous Reception (DRX) configuration that is specific to a type of carrier.
    Type: Application
    Filed: August 23, 2021
    Publication date: December 16, 2021
    Inventors: Takashi Suzuki, Zhijun Cai, Rene Waraputra Purnadi
  • Publication number: 20210345309
    Abstract: A method for processing a control channel at a user agent (UA) to identify at least one of an uplink and a downlink resource allocated by a resource grant within a multi-carrier communication system wherein resource grants are specified by control channel element (CCE) subset candidates wherein the carriers used for data transmission and reception are configured carriers, the method comprising the steps of receiving activation signals specifying active and deactivated carriers from among the configured carriers, for active carriers (i) identifying a number of CCE subset candidates to decode and (ii) decoding up to the identified number of CCE subset candidates in an attempt to identify the resource grant; and for deactivated carriers, ignoring CCE subset candidates associated with the deactivated carriers.
    Type: Application
    Filed: July 12, 2021
    Publication date: November 4, 2021
    Inventors: SEAN MICHAEL MCBEATH, ANDREW MARK EARNSHAW, MO-HAN FONG, YOUN HYOUNG HEO, ZHIJUN CAI
  • Publication number: 20210281931
    Abstract: A method at a sensor apparatus, the method including calculating a value for a target function based on at least one sensor of the sensor apparatus; determining that the value of the target function is within a defined threshold range for a defined time period, thereby finding an in-flight state for the sensor apparatus; and turning off transmission from a radio of the sensor apparatus based on the in-flight state.
    Type: Application
    Filed: May 20, 2021
    Publication date: September 9, 2021
    Inventors: Zhijun Cai, Shouxing Qu, Yu Gao, Gaëlle Christine Martin-Cocher, Jesse William Bennett
  • Publication number: 20210281077
    Abstract: A device may receive a power demand for a load and a weather forecast for a time period. The device may determine a first supply of power available from a photo-voltaic (PV) installation for the time period based on the weather forecast. The device may determine a power deficit for the time period based on the power demand and the first supply of power. The device may determine a first cost associated with utilizing a second supply of power available from a battery and a second cost associated with utilizing a third supply of power available from an engine for the time period. The device may determine a power source to overcome the power deficit based on the first cost and the second cost and may cause the PV installation and the power source to supply power to satisfy the power demand for the load.
    Type: Application
    Filed: March 3, 2020
    Publication date: September 9, 2021
    Applicant: Caterpillar Inc.
    Inventors: Zhijun CAI, Yanchai ZHANG
  • Patent number: RE48767
    Abstract: A system and method for permuting known and unknown message bits before encoding to provide a beneficial rearrangement of bits. Such a method can improve distance properties in the resulting subcode. In various embodiments, the structure of a beneficial rearrangement is dependent on the parameters of how known and unknown bits are grouped and on the specific type of code being used. Given these two parameters, the message bits can be rearranged to more efficiently leverage any apriori knowledge.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: October 5, 2021
    Assignee: BlackBerry Limited
    Inventors: Michael Eoin Buckley, Sean Bartholomew Simmons, Nathaniel Joseph Karst, Youn Hyoung Heo, Zhijun Cai, Andrew Mark Earnshaw, Masoud Ebrahimi Tazeh Mahalleh, Mo-Han Fong