Patents by Inventor Junfeng Song
Junfeng Song 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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Patent number: 11953903Abstract: The present disclosure provides a neural network-based method for calibration and localization of an indoor inspection robot. The method includes the following steps: presetting positions for N label signal sources capable of transmitting radio frequency (RF) signals; computing an actual path of the robot according to numbers of signal labels received at different moments; computing positional information moved by the robot at a tth moment, and computing a predicted path at the tth moment according to the positional information; establishing an odometry error model with the neural network and training the odometry error model; and inputting the predicted path at the tth moment to a well-trained odometry error model to obtain an optimized predicted path. The present disclosure maximizes the localization accuracy for the indoor robot by minimizing the error of the odometer with the odometry calibration method.Type: GrantFiled: January 31, 2022Date of Patent: April 9, 2024Assignees: Chongqing University, Star Institute of Intelligent Systems, DB (Chongqing) Intelligent Technology Research Institute Co., LTDInventors: Yongduan Song, Jie Zhang, Junfeng Lai, Huan Liu, Ziqiang Jiang, Li Huang
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Patent number: 10578438Abstract: Various embodiments may provide an optical gyroscope. The optical gyroscope may include a ring resonator, an input source configured to generate or provide a first light beam and a second light beam to the ring resonator, and a switching pathway having an input end and an output end coupled to the ring resonator, and may include a plurality of switches. The optical gyroscope may include a control circuit configured to control the plurality of switches to allow the first light beam to propagate from the input end to the output end along the switching pathway during a first time interval, and allow the second light beam to propagate from the input end to the output end along the switching pathway during a second time interval. The optical gyroscope may additionally include a detector loop configured to receive the first light beam and the second light beam from the ring resonator.Type: GrantFiled: January 24, 2017Date of Patent: March 3, 2020Assignee: Agency for Science, Technology and ResearchInventors: Guoqiang Wu, Jifang Tao, Alex Yuandong Gu, Junfeng Song
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Patent number: 10408775Abstract: According to various embodiments, there is provided a sensor arrangement including a filter configured to provide an output signal having an output wavelength, the output wavelength having a dependence on a temperature of the filter; a temperature module configured to change the temperature of the filter; a controller circuit configured to control the temperature module for changing the temperature of the filter until the output wavelength increases with decreasing temperature; and a determination circuit configured to determine a dew point of an environment surrounding the sensor arrangement, based on a minimum value of the output wavelength and the dependence.Type: GrantFiled: May 25, 2016Date of Patent: September 10, 2019Assignee: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCHInventors: Jifang Tao, Alex Yuan-dong Gu, Hong Cai, Junfeng Song
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Patent number: 10303458Abstract: Systems, methods, and computer-readable storage media for multi-platform installers. In some embodiments, a computing system can launch a software package configured to perform a software installation at the computing system. The software package can then detect an underlying computing environment associated with the computing system, the underlying computing environment including a type of system, software characteristics, and/or hardware characteristics. Based on the detected underlying computing environment, the software package can select settings for a configuration update on the computing system. The settings can define network configuration parameters, system firmware parameters, drive configuration parameters, system boot drive configuration parameters, etc. Based on the settings, the software package can execute the configuration update on the computing system, and install a software application on the computing system, based on the configuration update.Type: GrantFiled: September 29, 2016Date of Patent: May 28, 2019Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LPInventors: Amine Ouarraoui, Hugh Jeffrey Small, Paul Cevoli, Junfeng Song
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Publication number: 20190049249Abstract: Various embodiments may provide an optical gyroscope. The optical gyroscope may include a ring resonator, an input source configured to generate or provide a first light beam and a second light beam to the ring resonator, and a switching pathway having an input end and an output end coupled to the ring resonator, and may include a plurality of switches. The optical gyroscope may include a control circuit configured to control the plurality of switches to allow the first light beam to propagate from the input end to the output end along the switching pathway during a first time interval, and allow the second light beam to propagate from the input end to the output end along the switching pathway during a second time interval. The optical gyroscope may additionally include a detector loop configured to receive the first light beam and the second light beam from the ring resonator.Type: ApplicationFiled: January 24, 2017Publication date: February 14, 2019Inventors: Guoqiang Wu, Jifang Tao, Alex Yuandong Gu, Junfeng Song
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Patent number: 10133145Abstract: According to embodiments of the present invention, an optical device is provided. The optical device includes a waveguide structure including a floating gate, and an optical waveguide arranged spaced apart from the floating gate, wherein the optical waveguide overlaps with the floating gate, a carrier injection portion arranged spaced apart from the floating gate, and an electrode arrangement, wherein, in response to a first voltage difference applied to the electrode arrangement, the optical device is configured to inject charge carriers from the carrier injection portion to the floating gate to cause a change in refractive index of the waveguide structure, and wherein, in response to a second voltage difference applied to the electrode arrangement, the optical device is configured to drive the charge carriers from the floating gate to the optical waveguide to deplete the charge carriers.Type: GrantFiled: January 11, 2016Date of Patent: November 20, 2018Assignee: Agency for Science, Technology and ResearchInventors: Junfeng Song, Xianshu Luo, Patrick Guo-Qiang Lo
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Publication number: 20180164236Abstract: According to various embodiments, there is provided a sensor arrangement including a filter configured to provide an output signal having an output wavelength, the output wavelength having a dependence on a temperature of the filter; a temperature module configured to change the temperature of the filter; a controller circuit configured to control the temperature module for changing the temperature of the filter until the output wavelength increases with decreasing temperature; and a determination circuit configured to determine a dew point of an environment surrounding the sensor arrangement, based on a minimum value of the output wavelength and the dependence.Type: ApplicationFiled: May 25, 2016Publication date: June 14, 2018Inventors: Jifang TAO, Alex Yuan-dong GU, Hong CAI, Junfeng SONG
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Publication number: 20180088932Abstract: Systems, methods, and computer-readable storage media for multi-platform installers. In some embodiments, a computing system can launch a software package configured to perform a software installation at the computing system. The software package can then detect an underlying computing environment associated with the computing system, the underlying computing environment including a type of system, software characteristics, and/or hardware characteristics. Based on the detected underlying computing environment, the software package can select settings for a configuration update on the computing system. The settings can define network configuration parameters, system firmware parameters, drive configuration parameters, system boot drive configuration parameters, etc. Based on the settings, the software package can execute the configuration update on the computing system, and install a software application on the computing system, based on the configuration update.Type: ApplicationFiled: September 29, 2016Publication date: March 29, 2018Inventors: Amine Ouarraoui, Jeff Small, Paul Cevoli, Junfeng Song
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Publication number: 20170371226Abstract: According to embodiments of the present invention, an optical device is provided. The optical device includes a waveguide structure including a floating gate, and an optical waveguide arranged spaced apart from the floating gate, wherein the optical waveguide overlaps with the floating gate, a carrier injection portion arranged spaced apart from the floating gate, and an electrode arrangement, wherein, in response to a first voltage difference applied to the electrode arrangement, the optical device is configured to inject charge carriers from the carrier injection portion to the floating gate to cause a change in refractive index of the waveguide structure, and wherein, in response to a second voltage difference applied to the electrode arrangement, the optical device is configured to drive the charge carriers from the floating gate to the optical waveguide to deplete the charge carriers.Type: ApplicationFiled: January 11, 2016Publication date: December 28, 2017Inventors: Junfeng Song, Xianshu Luo, Patrick Guo-Qiang Lo
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Patent number: 9666736Abstract: According to embodiments of the present invention, a photodetector arrangement is provided. The photodetector arrangement includes a plurality of germanium-based photodetectors, each germanium-based photodetector configured to receive an optical signal and to generate an electrical signal in response to the received optical signal, and an electrode arrangement arranged to conduct the electrical signals.Type: GrantFiled: January 27, 2014Date of Patent: May 30, 2017Assignee: Agency for Science, Technology and ResearchInventors: Xianshu Luo, Junfeng Song, Guo-Qiang Patrick Lo
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Patent number: 9581545Abstract: An optical sensing system may include a light separation element configured to separate an input light into a plurality of sliced lights and a first resonator configured to receive one sliced light of the plurality of sliced lights. An effective refractive index of the first resonator may be changeable in response to a change in a refractive index of a cladding of the first resonator, a second resonator coupled to the first resonator and a detector configured to measure an intensity of the sliced light, the intensity of the sliced light based on a difference between a resonant wavelength of the first resonator and a resonant wavelength of the second resonator. The difference between a resonant wavelength of the first resonator and a resonant wavelength of the second resonator may be based on the effective refractive index of the first resonator.Type: GrantFiled: October 8, 2013Date of Patent: February 28, 2017Assignee: Agency for Science, Technology and ResearchInventors: Junfeng Song, Xianshu Luo, Xiaoguang Tu, Qing Fang, Guo-Qiang Patrick Lo, Mingbin Yu
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Publication number: 20150372164Abstract: According to embodiments of the present invention, a photodetector arrangement is provided. The photodetector arrangement includes a plurality of germanium-based photodetectors, each germanium-based photodetector configured to receive an optical signal and to generate an electrical signal in response to the received optical signal, and an electrode arrangement arranged to conduct the electrical signals.Type: ApplicationFiled: January 27, 2014Publication date: December 24, 2015Inventors: Xianshu Luo, Junfeng Song, Guo-Qiang Patrick Lo
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Publication number: 20150268161Abstract: An optical sensing system may include a light separation element configured to separate an input light into a plurality of sliced lights and a first resonator configured to receive one sliced light of the plurality of sliced lights. An effective refractive index of the first resonator may be changeable in response to a change in a refractive index of a cladding of the first resonator, a second resonator coupled to the first resonator and a detector configured to measure an intensity of the sliced light, the intensity of the sliced light based on a difference between a resonant wavelength of the first resonator and a resonant wavelength of the second resonator. The difference between a resonant wavelength of the first resonator and a resonant wavelength of the second resonator may be based on the effective refractive index of the first resonator.Type: ApplicationFiled: October 8, 2013Publication date: September 24, 2015Inventors: Junfeng Song, Xianshu Luo, Xiaoguang Tu, Qing Fang, Guo-Qiang Patrick Lo, Mingbin Yu
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Patent number: 9136672Abstract: An optical light source is provided. The optical light source includes a waveguide including two reflectors arranged spaced apart from each other to define an optical cavity therebetween, an optical gain medium, and a coupling structure arranged to couple light between the optical cavity and the optical gain medium.Type: GrantFiled: November 26, 2013Date of Patent: September 15, 2015Assignee: Agency for Science, Technology and ResearchInventors: Xianshu Luo, Junfeng Song, Haifeng Zhou, Tsung-Yang Liow, Mingbin Yu, Patrick Guo-Qiang Lo
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Patent number: 9046494Abstract: According to embodiments of the present invention, an optical sensing system is provided. The optical sensing system includes a resonator arrangement including a first resonator, wherein an effective refractive index of the first resonator is changeable in response to a change in a refractive index of a cladding of the first resonator, and a second resonator to which a current or voltage being adjustable in response to a change in the effective refractive index of the first resonator is applied, wherein the optical sensing system is configured to determine the change in the effective refractive index of the first resonator based on a change in the current or voltage applied to the second resonator. Further embodiments provide a method of determining a change in an effective refractive index of a resonator of an optical sensing system.Type: GrantFiled: December 28, 2011Date of Patent: June 2, 2015Assignee: Agency for Science, Technology and ResearchInventors: Junfeng Song, Xianshu Luo, Qing Fang, Mingbin Yu, Guo Qiang Patrick Lo
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Publication number: 20140153600Abstract: An optical light source is provided. The optical light source includes a waveguide including two reflectors arranged spaced apart from each other to define an optical cavity therebetween, an optical gain medium, and a coupling structure arranged to couple light between the optical cavity and the optical gain medium.Type: ApplicationFiled: November 26, 2013Publication date: June 5, 2014Applicant: Agency for Science, Technology and ResearchInventors: Xianshu LUO, Junfeng SONG, Haifeng ZHOU, Tsung-Yang LIOW, Mingbin YU, Patrick Guo-Qiang LO
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Patent number: 8362494Abstract: An electro-optic device is disclosed. The electro-optic device includes an insulating layer, a first semiconducting region disposed above the insulating layer and being doped with doping atoms of a first conductivity type, a second semiconducting region disposed above the insulating layer and being doped with doping atoms of a second conductivity type and an electro-optic active region disposed above the insulating layer and between the first semiconducting region and the second semiconducting region. The electro-optic active region includes a first partial active region and a second partial active region and an insulating structure in between. The insulating structure extends perpendicular to the surface of the insulating layer such that there is no overlap of the first partial active region and the second partial active region in the direction perpendicular to the surface of the insulating layer. A method for manufacturing is also disclosed.Type: GrantFiled: August 8, 2007Date of Patent: January 29, 2013Assignee: Agency for Science, Technology and ResearchInventors: Guo-Qiang Patrick Lo, Kee-Soon Darryl Wang, Wei-Yip Loh, Mingbin Yu, Junfeng Song
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Publication number: 20120194803Abstract: According to embodiments of the present invention, an optical sensing system is provided. The optical sensing system includes a resonator arrangement including a first resonator, wherein an effective refractive index of the first resonator is changeable in response to a change in a refractive index of a cladding of the first resonator, and a second resonator to which a current or voltage being adjustable in response to a change in the effective refractive index of the first resonator is applied, wherein the optical sensing system is configured to determine the change in the effective refractive index of the first resonator based on a change in the current or voltage applied to the second resonator. Further embodiments provide a method of determining a change in an effective refractive index of a resonator of an optical sensing system.Type: ApplicationFiled: December 28, 2011Publication date: August 2, 2012Inventors: Junfeng SONG, Xianshu Luo, Qing Fang, Mingbin Yu, Guo Qiang Patrick Lo
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Publication number: 20110180795Abstract: An electro-optic device is disclosed. The electro-optic device includes an insulating layer, a first semiconducting region disposed above the insulating layer and being doped with doping atoms of a first conductivity type, a second semiconducting region disposed above the insulating layer and being doped with doping atoms of a second conductivity type and an electro-optic active region disposed above the insulating layer and between the first semiconducting region and the second semiconducting region.Type: ApplicationFiled: August 8, 2007Publication date: July 28, 2011Inventors: Guo-Qiang Patrick Lo, Kee-soon Darryl Wang, Wei-Yip Loh, Mingbin Yu, Junfeng Song