Patents by Inventor Zhifeng LIU
Zhifeng LIU 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: 20240116989Abstract: Processes for preparing compounds of Formula (1) and Formula (2) are described, wherein X, Y, Z, R1-R7, L and n are defined herein. Intermediates useful in the preparation of the compounds of Formula (1) and Formula (2) are also described.Type: ApplicationFiled: July 14, 2023Publication date: April 11, 2024Applicant: OnKure, Inc.Inventors: Anthony D. Piscopio, Xiaoyong Fu, Feng Shi, Huayan Liu, Zhifeng Li
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Publication number: 20240104006Abstract: Disclosed is a method for automatically generating interactive test cases. The method comprises: after a UI of an application program is displayed, traversing all views in a view tree corresponding to the UI of the application program, and recording a path, in the view tree, of each view therein that can be clicked on, so as to obtain a set of path information, in the view tree, of all the views that can be clicked on in the UI; and respectively generating a corresponding test case for each piece of path information in the set: in the test case, according to path information, in the view tree, of a view under test, finding the view in the UI interface of the application program, and triggering a click event therefore, that is, completing a click interaction test on the view. In the present invention, there is no strict requirements for the type and the running environment of an application program.Type: ApplicationFiled: October 8, 2021Publication date: March 28, 2024Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Han HUANG, Jie CAO, Lei YE, Fangqing LIU, Zhifeng HAO
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Publication number: 20240100697Abstract: The present disclosure relates to a multi-thread controller for a parallel robot. All tasks are concentrated in four layered threads, namely, a main thread, a real-time thread, a preprocessing thread and a background thread; different priorities of tasks are placed in different levels of threads, so that motion logic is first ensured, second motion planning, then communication and interface interaction, and finally file reading and time consumption calculation; various operations are strictly performed in respective threads; and between the threads are provided a thread security queue for data interaction and a thread clock calling and task pushing mechanism, so that the security of communication calling and the flexibility of data interaction are realized between the threads.Type: ApplicationFiled: April 12, 2022Publication date: March 28, 2024Inventors: Pingbu Zhu, Yanhua Li, Hui Wang, Zhifeng Li, Songtao Liu
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Publication number: 20240082966Abstract: A cross-coupling control method for moving beam of gantry machine tool is disclosed, which relates to the technical field of CNC machine tool control. The cross-coupling control method includes: Step 1: establishing a crossbeam dynamics model considering a ram on the crossbeam, and at the same time simplifying the model for an observer design; step 2: realizing a PID control parameter adjustment of motors at both ends in accordance with a method of parameter tuning of a unilateral servo control system; using a servo system with the same control parameters to jointly drive the crossbeam up and down, realizing the synchronous control and realizing PID control parameter tuning for both end motors. The disclosure not only reduces the synchronization error caused by the torsion of the crossbeam, but also solves the synchronization error caused by the asymmetric load on both sides, and improves the system robustness and stability.Type: ApplicationFiled: November 14, 2023Publication date: March 14, 2024Inventors: Chuanhai Chen, Zhifeng Liu, Jinyan Guo, Tongtong Jin, Xinyuan He, Shuo Zhao, Baobao Qi, Chunshi Liu, Zhaojun Yang, Zhijie Li, Chunlei Hua, Liang Zhang, Haoming Yan
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Patent number: 11890661Abstract: The present disclosure relates to an electromagnetic stamping method and an electromagnetic stamping device. The electromagnetic stamping method includes: dividing a blank holder of a stamping device into a plurality of blank holder areas based on a contour characteristic of a workpiece to be stamped; setting a blank holder force function over time for each blank holder area based on a shape characteristic of the blank holder area; collecting blank holder force data of each blank holder area every cycle period t0, and calculating an error between the blank holder force data and a value of the blank holder force function at a current time; and controlling a blank holder force for each blank holder area based on the error, and obtaining the workpiece to be stamped by stamping sheet material under the blank holder force.Type: GrantFiled: March 21, 2022Date of Patent: February 6, 2024Assignee: HEFEI UNIVERSITY OF TECHNOLOGYInventors: Lei Li, Haihong Huang, Haojie Sang, Mengxiao Yang, Qingyu Lyu, Lei Gan, Libin Zhu, Zhifeng Liu
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Publication number: 20230347465Abstract: An unloading device and an unloading method for a gantry-type machining center beam guide rail is disclosed, which is used to be installed on a sliding plate assembly, comprising a first booster mechanism and a second booster mechanism. When a worm rotates and drives a worm gear to rotate, an axial displacement can be generated by the worm gear along a worm gear shaft to push the retaining sleeve assembly, and an unloading force generated acts on a first mounting bracket. An unloading bolt of the second booster mechanism is connected with a press plate through threads, the unloading bolt is rotated to generate an axial displacement, and a second sliding block is pressed tightly against an unloading guide rail vertical surface by a second mounting bracket to generate an unloading force.Type: ApplicationFiled: July 5, 2023Publication date: November 2, 2023Inventors: Chuanhai Chen, Zhifeng Liu, Jingyan Guo, Shang Chen, Tongtong Jin, Baobao Qi, Zhaojun Yang, Junqi Long, Zhijie Li, Chunlei Hua, Liang Zhang, Haoming Yan
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Patent number: 11803167Abstract: Disclosed are an energy service system of a multi-machine production line and a control method thereof, the method includes reorganizing respective machines in the production line into three types of controllable entities: a drive system, an energy supply bus and an execution device, equipping them with a control center, and selecting a sub-drive system that is idle and is capable of completing the work stage with high energy efficiency to supply energy service for the corresponding execution device through the energy supply bus. Further disclosed is a design method of a multi-machine shared drive system of a production line, which increases the number of basic flow units of each drive unit to a maximum value one by one, and coordinates action time to form a variety of scheduling schemes, and selects a configuration scheme whose total time and total energy consumption are less as the shared drive system.Type: GrantFiled: May 19, 2021Date of Patent: October 31, 2023Assignee: HEFEI UNIVERSITY OF TECHNOLOGYInventors: Haihong Huang, Xiang Zou, Lei Li, Libin Zhu, Zhifeng Liu
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Publication number: 20230305514Abstract: The present invention discloses a post-processing method for a special seven-five axis linkage machine tool, comprising: building a multi-body kinematic model according to the structure of the machine tool, and building the multi-body kinematic model according to the sequence of workpiece-turntable-machine tool-cross beam-ram-milling head-cutting tool; establishing position coordinate transformation matrices according to the built multi-body kinematic model to obtain the matrices of cutter location points and tool orientation vectors; solving transformation equations of every motion axis of the machine tool and cutter location point coordinates according to the matrices of cutter location points and tool orientation vectors; building a corresponding relationship between the cutter location point coordinates and every motion axis of the machine tool based on a geometric level, and solving specific values of C-axis rotation angle of milling head and C2-axis rotation angle of the turntable.Type: ApplicationFiled: May 30, 2023Publication date: September 28, 2023Inventors: ZHIFENG LIU, YONGSHENG ZHAO, CAIXIA ZHANG, CONGBIN YANG, CHUANHAI CHEN, JINYAN GUO, YING LI
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Publication number: 20230228906Abstract: A five-point deconvolution method for quantification of uranium ores by energy spectrum logging disclosed by the invention refers to: carry out ? spectrum logging along the borehole to obtain logging curves in multiple energy zones, using these logging curves and energy spectrum features, inversion calculate the distribution of uranium content along the borehole; the main features are: first, realize the subdivision interpretation of layered strata; second, realize multi-element stripping for energy spectrum logging; third, realize subdivision interpretation by the five-point deconvolution methods; fourth, on-site uranium ores quantification under fast spectral logging conditions can be realized; the invention also discloses two types of algorithm flows of “first stripping, then subdividing” and “first subdividing, then stripping” and the formula for solving the uranium/thorium/potassium content of the unit layer.Type: ApplicationFiled: June 8, 2022Publication date: July 20, 2023Inventors: Bin Tang, Xiongjie Zhang, Haitao Wang, Zhifeng Liu, Yan Zhang, Renbo Wang, Lijiao Zhang, Rui Chen, Fan Huang, Shumin Zhou, Jinhui Qu
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Publication number: 20230008562Abstract: The present disclosure relates to an electromagnetic stamping method and an electromagnetic stamping device. The electromagnetic stamping method includes: dividing a blank holder of a stamping device into a plurality of blank holder areas based on a contour characteristic of a workpiece to be stamped; setting a blank holder force function over time for each blank holder area based on a shape characteristic of the blank holder area; collecting blank holder force data of each blank holder area every cycle period t0, and calculating an error between the blank holder force data and a value of the blank holder force function at a current time; and controlling a blank holder force for each blank holder area based on the error, and obtaining the workpiece to be stamped by stamping sheet material under the blank holder force.Type: ApplicationFiled: March 21, 2022Publication date: January 12, 2023Inventors: Lei LI, Haihong HUANG, Haojie SANG, Mengxiao YANG, Qingyu LYU, Lei GAN, Libin ZHU, Zhifeng LIU
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Patent number: 11518131Abstract: A press machine is provided. Two vertical hydraulic cylinders are arranged on an upper beam plate of a press machine body, and the two hydraulic cylinders correspond to workbenches at corresponding positions in a one-to-one correspondence, constituting left and right working units, and a common mechanical drive unit and a common hydraulic drive unit are set for the left and right working units. The mechanical driving unit is composed of a driving motor through an electromagnetic clutch, an electromagnetic brake and lead screw nut driving mechanism driven by a gear pair. According to the load profiles during the working process of hydraulic press machine, the mechanical driving unit or the hydraulic driving unit are selected to provide energy for the two working units. A control method for the press machine, a press machine execution system and a control method for the press machine execution system are further involved.Type: GrantFiled: October 26, 2021Date of Patent: December 6, 2022Assignee: HEFEI UNIVERSITY OF TECHNOLOGYInventors: Haihong Huang, Lei Li, Zhicheng Cao, Zhifeng Liu
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Publication number: 20220380880Abstract: A device and a method for fabricating a ceramic reinforced composite coating based on plasma remelting and injection. The device includes a plasma cladding assembly, a powder feeding assembly, a metal-based substrate, and a thermal infrared imager. The plasma cladding assembly comprises a plasma gun and a plasma generator. A plasma arc generated is used to heat the substrate and form a molten pool on the substrate. The powder feeding assembly comprises a powder feeder configured to feed ceramic particles to the molten pool through a powder feeding copper tube. The thermal infrared imager is configured to acquire an infrared image of the molten pool and acquire an optimal injection position of the ceramic particles according to the infrared image. The optimal injection position is a midpoint between a trailing edge of the plasma arc emitted on the substrate and a trailing edge of the molten pool.Type: ApplicationFiled: November 10, 2021Publication date: December 1, 2022Inventors: Haihong Huang, Hongmeng Xu, Lunwu Zhao, Yun Liu, Zhifeng LIU
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Publication number: 20220275351Abstract: Provided are a glycosyltransferase UGT76G1 mutant, an isolated polynucleotide, a carrier, a production method, and a composition and a kit for the glycosylation of substrates. Further provided are a method for increasing the catalytic activity of the glycosyltransferase UGT76G1 mutant, and a method for promoting the glycosylation of flavone compounds and the use thereof. The glycosyltransferase UGT76G1 mutant is subjected to mutations at positions corresponding to positions 87, 199, 204 or 379 of SEQ ID NO: 1, and significantly improves the transformation activity of substrates of the flavone compounds.Type: ApplicationFiled: September 25, 2020Publication date: September 1, 2022Inventors: Yong Wang, Yuwei Sun, Zhifeng Liu, Zhuo Chen, Jianhua Li, Haili Liu, Huajun Lv
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Patent number: 11428625Abstract: The invention disclosed a friction coefficient measuring device under the condition of material periodic deformation. The measuring device is mainly composed of a torque sensor, a sleeve system, an upper sample, a lower sample, a flexible fixture, an air bearing, a clamping system, a tension-compression sensor, a support rod, and a support table. A working module of a friction-wear testing machine is connected with the torque sensor and then connected with the sleeve system to fix the upper sample. A rotating module of the friction-wear testing machine is used for connecting the flexible fixture to fix the lower sample. The tension-compression sensor can accurately measure the radial force between the upper sample and the lower sample. The torque sensor can measure the load torque values of the upper sample and lower sample during testing.Type: GrantFiled: October 29, 2021Date of Patent: August 30, 2022Assignee: BEIJING UNIVERSITY OF TECHNOLOGYInventors: Caixia Zhang, Caixia Xu, Zhifeng Liu, Xiang Li, Mengmeng Liu, Hongyan Chu
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Publication number: 20220248660Abstract: An ultrasonic energy gathering device and an ultrasonic repeller using the ultrasonic energy gathering device are provided. The ultrasonic energy gathering device includes an energy gathering part. The energy gathering part has a trapezoidal cross section. The energy gathering part is provided with a gathering port and a diffusing port. The gathering port is smaller than the diffusing port. The ultrasonic energy gathering device further includes an ultrasonic fixing part. The ultrasonic fixing part fixes the ultrasonic energy gathering device with an ultrasonic transmitter of an ultrasonic repeller, so that an ultrasonic wave transmitted from the ultrasonic transmitter enters the gathering port to be gathered and strengthened, and the coverage of the ultrasonic wave gradually expands along the direction away from the diffusing port under the action of the ultrasonic energy gathering device.Type: ApplicationFiled: July 14, 2021Publication date: August 11, 2022Applicant: Shenzhen DogCare Innovation & Technology Co., Ltd.Inventors: Qingyong CHEN, Zhifeng LIU, Xiaona LIU, Xin HUANG
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Publication number: 20220235335Abstract: Provided are a mutant glycosyltransferase UGT76G1 and a use therefor, the catalytic activity, the substrate selectivity, and/or the substrate specificity of the mutant glycosyltransferase UGT76G1 having been changed. Mutation at specific points can promote the catalytic activity for 1,3-glycosylation of a substrate containing 1,2-diglucosyl (sophorosyl), and weaken the catalytic activity thereof to perform 1,3-glycosylation on a glucose monosaccharide substrate base. Also provided are mutations that weaken the catalytic activity of glycosyltransferase UGT76G1, able to increase accumulation of a specific stevioside intermediate.Type: ApplicationFiled: July 27, 2020Publication date: July 28, 2022Inventors: Yong Wang, Zhifeng Liu, Yuwei Sun, Huajun Lv, Peng Zhang, Jianxu Li, Haili Liu, Jianhua Li, Zhuo Chen
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Publication number: 20220167608Abstract: An ultrasonic dog repeller with two ultrasonic emitters comprises a housing (1) formed with a part cavity, a front support (2) clamped in the part cavity, a main board (3) clamped on the front support (2) and provided with a battery (4), and an ultrasonic head clamped on the front support (2), provided with a pair of ultrasonic emitters (5) capable of emitting in-phase ultrasonic sounds, and electrically connected to the main board (3). According to the ultrasonic dog repeller with two ultrasonic emitters, ultrasonic waves emitted by the two ultrasonic emitters (5) are superimposed, so that compared with the prior art, the ultrasonic waves can be transmitted farther by users, and the two ultrasonic emitters (5) are protected from being burnt out.Type: ApplicationFiled: May 10, 2021Publication date: June 2, 2022Inventors: QINGYONG CHEN, Zhifeng Liu, Xiaona Liu, Xin Huang
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Patent number: 11338798Abstract: Provided are a full-automatic parking method and system. The full-automatic parking method comprises: receiving a start instruction sent by a user, and activating an automatic parking system according to the start instruction; controlling a vehicle to automatically move forward and search, during moving, whether there is an available parking space at the left side or the right side of the vehicle, and when there is an available parking space, identifying basic information of the target parking space; planning a parking path according to the identified basic information of the target parking space, and obtaining a start point of parking and a parking path from the start point of parking to an end point of parking; controlling the vehicle to automatically move to the start point of parking; and controlling the vehicle to automatically park in the parking space according to the planned parking path.Type: GrantFiled: August 3, 2018Date of Patent: May 24, 2022Assignee: GUANGZHOU AUTOMOBILE GROUP CO., LTD.Inventors: Qinggui Pan, Qiaojun He, Ming Fan, Xiaomin Lin, Mingzhe Qiu, Zhifeng Liu
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Publication number: 20220120085Abstract: In one aspect, a method for manufacturing a roofing membrane may include steps of (a) providing a PET (Polyethylene terephthalate) layer, (b) applying a first adhesive layer to attach the PET layer to a first photochemistry reaction layer, (c) forming a combination layer by combining the layers in (b) with an aluminum layer, (d) attaching one side of a second photochemistry reaction layer to the combination layer in (c) through a second adhesive layer; and (e) applying a polymer layer on the other side of second photochemistry reaction layer. In one embodiment, the method for manufacturing a roofing membrane may further include a step (f) of heating the membrane formed in step (e) for 48 hours at 60° C.Type: ApplicationFiled: December 6, 2020Publication date: April 21, 2022Inventor: Zhifeng Liu
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Publication number: 20220065746Abstract: The invention discloses a detection method for radial deformation of flexspline of harmonic reducer under installation eccentricity state, taking the center of wave generator as the origin, the reference coordinate system is established in the method, and the offset between the center of wave generator and the pivotal center of rotary table is calculated by measuring the standard circle coaxial with the wave generator; the radial deformation function and the offset of wave generator under eccentricity state are taken to the theoretical ellipse eccentricity mathematical model to obtain the parameters of the actual ellipse; the offset and ellipse parameters are taken into the radial runout correction model of the flexspline to obtain the correction model under eccentricity state; the flexspline deformation function is measured and the correction model is taken to obtain the radial deformation function of the flexspline under standard state.Type: ApplicationFiled: November 8, 2021Publication date: March 3, 2022Inventors: Congbin YANG, Qingxu Guo, Zhifeng LIU, Yongsheng ZHAO, Caixia ZHANG, Qiang CHENG