Patents by Inventor Ruqi LI
Ruqi LI 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).
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Publication number: 20240094072Abstract: A miniature combined multi-axis force sensor structure includes a sensor body, a first shell and a second shell, two horizontal main beams and two vertical main beams are arranged on the periphery of an inner round platform in a cross shape, tail ends of the horizontal main beams and the vertical main beams are each connected to a vertical floating beam, and the horizontal floating beams consist of two thin-walled cambered beams; two ends of the horizontal floating beam are each connected to an outer round platform by means of an annular platform; the sensor body is arranged between the first shell and the second shell; strain gauges are stuck on the horizontal main beams and the vertical main beams to form two Wheatstone bridges; and when force/torque acts on the cross beam, the sensor deforms, and the resistance value of strain gauge at corresponding position changes.Type: ApplicationFiled: May 12, 2022Publication date: March 21, 2024Applicant: SOUTHEAST UNIVERSITYInventors: Aiguo SONG, Jingjing XU, Shuyan YANG, Baoguo XU, Huijun LI, Ruqi MA
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Patent number: 11920993Abstract: A miniature combined multi-axis force sensor structure includes a sensor body, a first shell and a second shell, two horizontal main beams and two vertical main beams are arranged on the periphery of an inner round platform in a cross shape, tail ends of the horizontal main beams and the vertical main beams are each connected to a vertical floating beam, and the horizontal floating beams consist of two thin-walled cambered beams; two ends of the horizontal floating beam are each connected to an outer round platform by means of an annular platform; the sensor body is arranged between the first shell and the second shell; strain gauges are stuck on the horizontal main beams and the vertical main beams to form two Wheatstone bridges; and when force/torque acts on the cross beam, the sensor deforms, and the resistance value of strain gauge at corresponding position changes.Type: GrantFiled: May 12, 2022Date of Patent: March 5, 2024Assignee: SOUTHEAST UNIVERSITYInventors: Aiguo Song, Jingjing Xu, Shuyan Yang, Baoguo Xu, Huijun Li, Ruqi Ma
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Patent number: 11916614Abstract: In one embodiment, a method includes identifying at a first powered device in communication with power sourcing equipment, a second powered device in communication with the first powered device, wherein the first powered device is receiving high voltage pulse power from the power sourcing equipment, notifying the power sourcing equipment of the second powered device at the first powered device, and performing a low voltage power initialization at the first powered device with the second powered device before passing the high voltage pulse power to the second powered device.Type: GrantFiled: February 9, 2021Date of Patent: February 27, 2024Assignee: CISCO TECHNOLOGY, INC.Inventors: Douglas Paul Arduini, Sung Kee Baek, Richard Anthony O'Brien, Joel Richard Goergen, Chad M. Jones, Jason DeWayne Potterf, Ruqi Li
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Publication number: 20230361668Abstract: A control method improves the efficiency profile of a power supply across a wide range of output loading. The method includes obtaining a measure of output power for a power supply, which includes one or more output modules and an auxiliary power supply. The method determines whether a maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power. Responsive to a determination that the maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power, the controller of the power supply directs the auxiliary power supply to provide the output power.Type: ApplicationFiled: July 17, 2023Publication date: November 9, 2023Inventors: Xiqun Zhu, Sung Kee Baek, Joel Goergen, Doug Paul Arduini, Ruqi Li
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Publication number: 20230344329Abstract: A control method improves the efficiency profile of a power supply across a wide range of output loading. The method includes obtaining a measure of output power for a power supply, which includes one or more output modules and an auxiliary power supply. The method determines whether a maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power. Responsive to a determination that the maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power, the controller of the power supply directs the auxiliary power supply to provide the output power.Type: ApplicationFiled: April 20, 2022Publication date: October 26, 2023Inventors: Xiqun Zhu, Sung Kee Baek, Joel Goergen, Doug Paul Arduini, Ruqi Li
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Patent number: 11777394Abstract: A control method improves the efficiency profile of a power supply across a wide range of output loading. The method includes obtaining a measure of output power for a power supply, which includes one or more output modules and an auxiliary power supply. The method determines whether a maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power. Responsive to a determination that the maximum power rating of the auxiliary power supply is sufficient to provide the measure of output power, the controller of the power supply directs the auxiliary power supply to provide the output power.Type: GrantFiled: April 20, 2022Date of Patent: October 3, 2023Assignee: CISCO TECHNOLOGY, INC.Inventors: Xiqun Zhu, Sung Kee Baek, Joel Goergen, Doug Paul Arduini, Ruqi Li
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Publication number: 20230308134Abstract: In one embodiment, a method includes receiving low voltage pulse power from power sourcing equipment at a powered device, synchronizing the powered device with a waveform of the low voltage pulse power received from the power sourcing equipment, and operating the powered device with high voltage pulse power received from the power sourcing equipment.Type: ApplicationFiled: March 20, 2023Publication date: September 28, 2023Inventors: Douglas Paul Arduini, Sung Kee Baek, Richard Anthony O'Brien, Joel Richard Goergen, Chad M. Jones, Jason DeWayne Potterf, Ruqi Li
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Publication number: 20230223988Abstract: Techniques are provided for detecting a fault across a pair of lines. Pulse power is applied across the pair of lines. The pulse power comprises alternating pulse on-time intervals and pulse off-time intervals. During a pulse off-time interval, a resistor is connected across the pair of lines and then disconnected when a voltage across the pair of lines reaches a first droop percentage in a first period of time. After disconnecting the resistor, it is determined whether the voltage across the pair of lines droops at least a second droop percentage within a second period of time that begins after the first period of time. Occurrence of a line-to-line fault across the pair of lines is determined when the voltage across the pair of lines droops by at least the second droop percentage or more within the second period of time.Type: ApplicationFiled: March 21, 2023Publication date: July 13, 2023Inventors: Douglas Paul Arduini, Ruqi Li, Chad M. Jones, Sung Kee Baek, Jason DeWayne Potterf, Joel Richard Goergen
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Patent number: 11522442Abstract: Embodiments herein describe control circuitry for operating a PFC converter in an AC-DC power supply under light loading conditions. The embodiments herein improve the power factor by identifying an optimized phase offset (?) between an AC reference voltage and an AC reference current used to control the PFC converter. In one embodiment, the control circuitry iteratively changes the phase offset between the reference voltage and current and measures its impact on the power factor. The control circuitry then selects the phase offset that results in the best power factor to use when operating the PFC converter under light loading conditions.Type: GrantFiled: July 30, 2021Date of Patent: December 6, 2022Assignee: Cisco Technology, Inc.Inventors: Ruqi Li, Sung K. Baek, Douglas P. Arduini, Xiqun Zhu
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Patent number: 11456883Abstract: In one embodiment, an apparatus comprises an input power interface for receiving input power, a power control system for transmitting DC (Direct Current) pulse power on multiple phases over a cable to a plurality of powered devices and verifying cable operation during an off-time of pulses in the DC pulse power, and a cable interface for delivery of the DC pulse power on the multiple phases and data over the cable to the powered devices. A method for transmitting multiple phase pulse power is also disclosed herein.Type: GrantFiled: April 10, 2019Date of Patent: September 27, 2022Assignee: CISCO TECHNOLOGY, INC.Inventors: Richard Anthony O'Brien, Douglas Paul Arduini, Sung Kee Baek, Ruqi Li, Joel Richard Goergen
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Publication number: 20220116238Abstract: In one embodiment, an apparatus comprises an input power interface for receiving input power, a power control system for transmitting DC (Direct Current) pulse power on multiple phases over a cable to a plurality of powered devices and verifying cable operation during an off-time of pulses in the DC pulse power, and a cable interface for delivery of the DC pulse power on the multiple phases and data over the cable to the powered devices. A method for transmitting multiple phase pulse power is also disclosed herein.Type: ApplicationFiled: December 23, 2021Publication date: April 14, 2022Inventors: Richard Anthony O'Brien, Douglas Paul Arduini, Sung Kee Baek, Ruqi Li, Joel Richard Goergen
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Patent number: 11063630Abstract: In one embodiment, a method includes transmitting from power sourcing equipment, low voltage pulse power to a powered device in a communications network, performing a safety test, enabling high voltage pulse power operation at the power sourcing equipment upon passing the safety test, and transmitting high voltage pulse power from the power sourcing equipment to the powered device. The powered device synchronizes with a waveform of the low voltage pulse power.Type: GrantFiled: November 1, 2019Date of Patent: July 13, 2021Assignee: CISCO TECHNOLOGY, INC.Inventors: Douglas Paul Arduini, Sung Kee Baek, Richard Anthony O'Brien, Joel Richard Goergen, Chad M. Jones, Jason DeWayne Potterf, Ruqi Li
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Publication number: 20210167814Abstract: In one embodiment, a method includes identifying at a first powered device in communication with power sourcing equipment, a second powered device in communication with the first powered device, wherein the first powered device is receiving high voltage pulse power from the power sourcing equipment, notifying the power sourcing equipment of the second powered device at the first powered device, and performing a low voltage power initialization at the first powered device with the second powered device before passing the high voltage pulse power to the second powered device.Type: ApplicationFiled: February 9, 2021Publication date: June 3, 2021Applicant: CISCO TECHNOLOGY, INC.Inventors: Douglas Paul Arduini, Sung Kee Baek, Richard Anthony O'Brien, Joel Richard Goergen, Chad M. Jones, Jason DeWayne Potterf, Ruqi Li
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Publication number: 20210167813Abstract: In one embodiment, a method includes receiving low voltage pulse power from power sourcing equipment at a powered device, synchronizing the powered device with a waveform of the low voltage pulse power received from the power sourcing equipment, and operating the powered device with high voltage pulse power received from the power sourcing equipment.Type: ApplicationFiled: February 9, 2021Publication date: June 3, 2021Applicant: CISCO TECHNOLOGY, INC.Inventors: Douglas Paul Arduini, Sung Kee Baek, Richard Anthony O'Brien, Joel Richard Goergen, Chad M. Jones, Jason DeWayne Potterf, Ruqi Li
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Publication number: 20210135890Abstract: In one embodiment, a method includes transmitting from power sourcing equipment, low voltage pulse power to a powered device in a communications network, performing a safety test, enabling high voltage pulse power operation at the power sourcing equipment upon passing the safety test, and transmitting high voltage pulse power from the power sourcing equipment to the powered device. The powered device synchronizes with a waveform of the low voltage pulse power.Type: ApplicationFiled: November 1, 2019Publication date: May 6, 2021Applicant: CISCO TECHNOLOGY, INC.Inventors: Douglas Paul Arduini, Sung Kee Baek, Richard Anthony O'Brien, Joel Richard Goergen, Chad M. Jones, Jason DeWayne Potterf, Ruqi Li
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Publication number: 20200295955Abstract: In one embodiment, an apparatus comprises an input power interface for receiving input power, a power control system for transmitting DC (Direct Current) pulse power on multiple phases over a cable to a plurality of powered devices and verifying cable operation during an off-time of pulses in the DC pulse power, and a cable interface for delivery of the DC pulse power on the multiple phases and data over the cable to the powered devices. A method for transmitting multiple phase pulse power is also disclosed herein.Type: ApplicationFiled: April 10, 2019Publication date: September 17, 2020Applicant: CISCO TECHNOLOGY, INC.Inventors: Richard Anthony O'Brien, Douglas Paul Arduini, Sung Kee Baek, Ruqi Li, Joel Richard Goergen
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Patent number: 9780669Abstract: In one embodiment, a power apparatus includes a buck converter including a first capacitor, a first inductor and a first switch for connection with a direct current power supply, wherein when the first switch is closed and the buck converter is connected to the direct current power supply, the first capacitor and the first inductor are connected in series to the direct current power supply, a full-bridge inverter including at least four switches including the first switch, a second, third and fourth switch so that the first switch is shared by the inventor and buck converter, the inverter being operative to convert direct current to alternating current by alternating (a) closing the first and fourth switch with the second and third switch open, and (b) closing the second and third switch with the first and fourth switch open, and a transformer to step down an output of the inverter.Type: GrantFiled: January 5, 2016Date of Patent: October 3, 2017Assignee: Cisco Technology, Inc.Inventors: Yang li, Kan Seto, Michael Grant, Matt Howard, Ruqi Li
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Publication number: 20170194867Abstract: In one embodiment, a power apparatus includes a buck converter including a first capacitor, a first inductor and a first switch for connection with a direct current power supply, wherein when the first switch is closed and the buck converter is connected to the direct current power supply, the first capacitor and the first inductor are connected in series to the direct current power supply, a full-bridge inverter including at least four switches including the first switch, a second, third and fourth switch so that the first switch is shared by the inventor and buck converter, the inverter being operative to convert direct current to alternating current by alternating (a) closing the first and fourth switch with the second and third switch open, and (b) closing the second and third switch with the first and fourth switch open, and a transformer to step down an output of the inverter.Type: ApplicationFiled: January 5, 2016Publication date: July 6, 2017Inventors: Yang LI, Kan SETO, Michael GRANT, Matt HOWARD, Ruqi LI