Patents by Inventor Changchun Li
Changchun 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: 20240077632Abstract: The present disclosure belongs to the field of geological exploration, and particularly relates to a seismic acquisition system based on a frequency domain expansion MEMS sensor, aiming at solving the problem that vibration frequencies exceed the frequency range of the MEMS sensor due to strong vibrations and cross coupling of multi-frequency signals usually occurring in well logging while drilling. When the MEMS sensor suffers strong vibrations or the MEMS sensor that can be selected cannot ensure that the frequency requirement of a measurement signal is stably met, the frequency domain expander of the present disclosure expands the frequency domain of a detection signal, so that the MEMS sensor can measure strong vibrations and out-of-band frequencies to a certain extent, the application range of the seismic acquisition system is extended, and the anti-mutation capability of the seismic acquisition system is improved.Type: ApplicationFiled: November 23, 2022Publication date: March 7, 2024Applicant: Institute of Geology and Geophysics, Chinese Academy of SciencesInventors: Jing LIU, Zongwei LI, Yongjian ZHOU, Kedu HAN, Changchun YANG
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Patent number: 11833888Abstract: A system and method for protecting against low refrigerant charge of a refrigerant subsystem in a vehicle includes a controller configured to control a component of the vehicle in response to detecting a low refrigerant charge based on an ambient temperature of the refrigerant subsystem, a suction pressure of refrigerant entering a compressor of the refrigerant subsystem, and a speed of the compressor.Type: GrantFiled: February 10, 2022Date of Patent: December 5, 2023Assignee: Ford Global Technologies, LLCInventors: Changchun Li, Jianqing Xu
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Publication number: 20230356568Abstract: This disclosure relates to a vehicle configured to detect a low refrigerant charge and a corresponding method. In some aspects, the techniques described herein relate to a vehicle, including: a thermal conditioning system including a compressor and a suction pressure sensor upstream of the compressor; and a controller in communication with the compressor and the suction pressure sensor, wherein the controller is configured to perform a technique to monitor for a low charge condition, and the controller is configured to inhibit a low pressure cutoff when the controller is performing technique.Type: ApplicationFiled: May 6, 2022Publication date: November 9, 2023Inventors: Rohan Shrivastava, Changchun Li, Jan Xu, Jennifer Helen Chang
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Publication number: 20230249522Abstract: A system and method for protecting against low refrigerant charge of a refrigerant subsystem in a vehicle includes a controller configured to control a component of the vehicle in response to detecting a low refrigerant charge based on an ambient temperature of the refrigerant subsystem, a suction pressure of refrigerant entering a compressor of the refrigerant subsystem, and a speed of the compressor.Type: ApplicationFiled: February 10, 2022Publication date: August 10, 2023Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Changchun Li, Jianqing Xu
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Publication number: 20230150150Abstract: Robot charging dock includes a charge connector configured to mate with a charging port of a mobile robot. There is a charge connector frame having a front surface on which the charge connector is mounted. The front surface has a first side edge and a second side edge. There is a front cover disposed over the charge connector frame which has an aperture through which the charge connector protrudes. At least a portion of the front cover is spaced from the front surface of the charge connector frame, defining an internal region. There is an opening to the internal region formed along at least a portion of a perimeter of the aperture and there is a light source disposed in the internal region. The light source is directed toward the opening to allow the light source to illuminate charge connector.Type: ApplicationFiled: November 22, 2021Publication date: May 18, 2023Inventors: Michael Sussman, Seth Edwards Allen, Brad Edward Fiore, Hian Kai Kwa, Keegan Burgess Smith, Rafael Gregorio Chavez, Changchun Li, Scott Matthew Rydbeck
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Patent number: 11571944Abstract: A thermal system for a vehicle includes a high temperature coolant loop thermally coupled to a heater core, a low temperature coolant loop thermally coupled to at least one of an electric motor and power electronics, and a first four-way valve configured to selectively fluidly couple the high temperature coolant loop and the low temperature coolant loop such that coolant heated by the electric motor and/or the power electronics is directed to the heater core to facilitate heating of an airflow passing thereby.Type: GrantFiled: November 24, 2020Date of Patent: February 7, 2023Assignee: FCA US LLCInventors: Craig A Lindquist, Changchun Li, Attilio Crivellari
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Publication number: 20230034492Abstract: A system for determining pose of a lidar sensor in an environment in order to calibrate the lidar sensor. The system includes at least two calibration boards, each having a first edge and a second edge. There is a controller coupled to the lidar sensor to cause the lidar sensor to direct a lidar scan at the calibration boards. The controller causes the lidar sensor to receive a reflection of the lidar scan from the calibration boards and determine locations of a first crossing point on the first edge and a second crossing point on the second edge of the calibration boards. The controller determines a reference plane defined by the first and second crossing points of each of the calibration boards, performs a plane transform of the reference frame to obtain a lidar sensor plane and determine from the lidar sensor plane a pose of the lidar sensor.Type: ApplicationFiled: July 20, 2021Publication date: February 2, 2023Inventor: Changchun Li
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Patent number: 11409322Abstract: The present disclosure provides a method for timing control of an electronic device, comprising: receiving a timing control instruction for the electronic device from a user, the timing control instruction comprises controlling the electronic device to operate repeatedly during N continuous time periods with the same certain time duration, wherein N is a positive integer greater than or equal to 2, and each time period at least comprises a first sub-time period and a second sub-time period. Controlling an operation of the electronic device during each time period comprises: controlling the electronic device to perform a first action at a first time point which is a beginning of the time period; controlling the electronic device to perform a second action different from the first action, in response to the first sub-time period having elapsed since the first time point, and controlling the electronic device according to the timing control instruction.Type: GrantFiled: September 30, 2018Date of Patent: August 9, 2022Assignees: BEIJING JINGDONG SHANGKE INFORMATION TECHNOLOGY CO., LTD., BEIJING JINGDONG CENTURY TRADING CO., LTD.Inventors: Changchun Li, Liu Liu, Genxiong Luo, Qiang Ren, Jian Gou
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Patent number: 11405557Abstract: A method for rolling shutter compensation for a camera sensor mounted on a moving vehicle includes estimating, based on a plurality of images of an object, a speed and a direction of movement of the vehicle; acquiring an additional image of the object having four corners; estimating a location of each of the four corners of the object in an image plane defined by the additional image; determining a corrected location in 3D space for each of the four corners of the object; determining a first compensated location for each of the four corners of the object in the image plane; determining a second compensated location for each of the four corners of the object in the image plane; and determining a difference between the first compensated locations of the four corners of the object and the second compensated locations of the four corners of the object.Type: GrantFiled: July 20, 2021Date of Patent: August 2, 2022Assignee: Locus Robotics Corp.Inventor: Changchun Li
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Publication number: 20220161630Abstract: A thermal system for a vehicle includes a high temperature coolant loop thermally coupled to a heater core, a low temperature coolant loop thermally coupled to at least one of an electric motor and power electronics, and a first four-way valve configured to selectively fluidly couple the high temperature coolant loop and the low temperature coolant loop such that coolant heated by the electric motor and/or the power electronics is directed to the heater core to facilitate heating of an airflow passing thereby.Type: ApplicationFiled: November 24, 2020Publication date: May 26, 2022Inventors: Craig A. Lindquist, Changchun Li, Attilio Crivellari
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Patent number: 11250644Abstract: A system and method for analysing queues in frames of video enables operators to preferably draw three regions of interest overlaid upon the video as short, medium, and long queue regions that form a notional queue area within the video. The regions are drawn with knowledge of, or in anticipation of, foreground objects such as individuals and vehicles waiting for service in a queue. Examples include retail point of sale locations or for automated teller machine (ATM) transactions. In conjunction with a video analytics system that analyses the movement of the foreground objects relative to the queue regions, the system determines the number of objects occupying each queue region, length of the queue, and other queue-related statistics. The system can then create reports and send messages that include the queue analysis results for directing operators to change their staffing resources as part of a real-time queue servicing and optimization response.Type: GrantFiled: September 5, 2019Date of Patent: February 15, 2022Assignee: Sensormatic Electronics, LLCInventors: Ian C. Westmacott, Changchun Li
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Publication number: 20200333769Abstract: The present disclosure provides a method for timing control of an electronic device, comprising: receiving a timing control instruction for the electronic device from a user, the timing control instruction comprises controlling the electronic device to operate repeatedly during N continuous time periods with the same certain time duration, wherein N is a positive integer greater than or equal to 2, and each time period at least comprises a first sub-time period and a second sub-time period. Controlling an operation of the electronic device during each time period comprises: controlling the electronic device to perform a first action at a first time point which is a beginning of the time period; controlling the electronic device to perform a second action different from the first action, in response to the first sub-time period having elapsed since the first time point, and controlling the electronic device according to the timing control instruction.Type: ApplicationFiled: September 30, 2018Publication date: October 22, 2020Inventors: Changchun LI, Liu LIU, Genxiong LUO, Qiang REN, Jian GOU
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Publication number: 20190392222Abstract: A system and method for analysing queues in frames of video enables operators to preferably draw three regions of interest overlaid upon the video as short, medium, and long queue regions that form a notional queue area within the video. The regions are drawn with knowledge of, or in anticipation of, foreground objects such as individuals and vehicles waiting for service in a queue. Examples include retail point of sale locations or for automated teller machine (ATM) transactions. In conjunction with a video analytics system that analyses the movement of the foreground objects relative to the queue regions, the system determines the number of objects occupying each queue region, length of the queue, and other queue-related statistics. The system can then create reports and send messages that include the queue analysis results for directing operators to change their staffing resources as part of a real-time queue servicing and optimization response.Type: ApplicationFiled: September 5, 2019Publication date: December 26, 2019Inventors: Ian C. Westmacott, Changchun Li
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Patent number: 10466877Abstract: The present invention discloses a method and a device for selecting an entity in a drawing, wherein the method includes that a hooked preview program corresponding to a functional instruction is invoked after the functional instruction is inputted into a Computer Aided Design (CAD) system; a pickup point in a drawing is selected; an entity in a predetermined range is filtered around the pickup point to obtain a preselected entity; the preselected entity is processed via the hooked preview program so as to pre-display a result of processing the preselected entity by the inputted instruction. An effect of a selected entity processed by a control instruction can be previewed according to the present invention, thus avoiding repeated selections of a graphic entity by a user to further improve working efficiency.Type: GrantFiled: September 30, 2014Date of Patent: November 5, 2019Assignee: SUZHOU GSTARSOFT CO., LTD.Inventors: Guangsheng Wang, Songbin Guan, Changchun Li, Jiang Liang, Xiang Lu
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Patent number: 10445589Abstract: A system and method for analyzing queues in frames of video enables operators to preferably draw three regions of interest overlaid upon the video as short, medium, and long queue regions that form a notional queue area within the video. The regions are drawn with knowledge of, or in anticipation of, foreground objects such as individuals and vehicles waiting for service in a queue. Examples include retail point of sale locations or for automated teller machine (ATM) transactions. In conjunction with a video analytics system that analyses the movement of the foreground objects relative to the queue regions, the system determines the number of objects occupying each queue region, length of the queue, and other queue-related statistics. The system can then create reports and send messages that include the queue analysis results for directing operators to change their staffing resources as part of a real-time queue servicing and optimization response.Type: GrantFiled: March 29, 2018Date of Patent: October 15, 2019Assignee: Sensormatic Electronics, LLCInventors: Ian C. Westmacott, Changchun Li
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Patent number: 10235599Abstract: A method and system for analyzing video data in a security system. An analysis compares a current frame to a background model. The analysis system compares the background model to the current frame to identify changed pixel patches. The analysis system uses morphological image processing to generate masks based on the changed pixel patches. Next, the analysis system applies the masks to the background model and the current frames to determine whether the changed pixel patches are characteristic of abandoned or removed objects within the video data.Type: GrantFiled: July 3, 2018Date of Patent: March 19, 2019Assignee: Sensormatic Electronics, LLCInventors: Changchun Li, Ian C. Westmacott, Mirko Ristivojevic, Matthew A. Gruenke
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Publication number: 20180330189Abstract: A method and system for analyzing video data in a security system. An analysis compares a current frame to a background model. The analysis system compares the background model to the current frame to identify changed pixel patches. The analysis system uses morphological image processing to generate masks based on the changed pixel patches. Next, the analysis system applies the masks to the background model and the current frames to determine whether the changed pixel patches are characteristic of abandoned or removed objects within the video data.Type: ApplicationFiled: July 3, 2018Publication date: November 15, 2018Inventors: Changchun Li, Ian C. Westmacott, Mirko Ristivojevic, Matthew A. Gruenke
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Patent number: 10043105Abstract: A method and system for analyzing video data in a security system. An analysis compares a current frame to a background model. The analysis system compares the background model to the current frame to identify changed pixel patches. The analysis system uses morphological image processing to generate masks based on the changed pixel patches. Next, the analysis system applies the masks to the background model and the current frames to determine whether the changed pixel patches are characteristic of abandoned or removed objects within the video data.Type: GrantFiled: December 8, 2015Date of Patent: August 7, 2018Assignee: Sensormatic Electronics, LLCInventors: Changchun Li, Ian Westmacott, Mirko Ristivojevic, Matthew A. Gruenke
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Publication number: 20180218223Abstract: A system and method for analysing queues in frames of video enables operators to preferably draw three regions of interest overlaid upon the video as short, medium, and long queue regions that form a notional queue area within the video. The regions are drawn with knowledge of, or in anticipation of, foreground objects such as individuals and vehicles waiting for service in a queue. Examples include retail point of sale locations or for automated teller machine (ATM) transactions. In conjunction with a video analytics system that analyses the movement of the foreground objects relative to the queue regions, the system determines the number of objects occupying each queue region, length of the queue, and other queue-related statistics. The system can then create reports and send messages that include the queue analysis results for directing operators to change their staffing resources as part of a real-time queue servicing and optimization response.Type: ApplicationFiled: March 29, 2018Publication date: August 2, 2018Inventors: Ian C. Westmacott, Changchun Li
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Patent number: D1017012Type: GrantFiled: September 26, 2023Date of Patent: March 5, 2024Inventor: Changchun Li