Patents Assigned to Southeast University
  • Patent number: 11372129
    Abstract: A post-compensation method for motion errors of a rotating accelerometer gravity gradiometer includes the steps of: during moving-base gravity gradient exploration, recording angular and linear motions of a gravity gradiometer; after the exploration, removing angular and linear motion errors from output data of the gravity gradiometer based on an analytical model of the rotating accelerometer gravity gradiometer; while ensuring that the precision of the gravity gradiometer is unchanged, the post-compensation method for the motion errors may be applied to greatly reduce the requirements of the gravity gradiometer for the precision of an online error compensation system, thereby simplifying the circuit design and mechanical design of the rotary accelerometer gravity gradiometer, and making the rotating accelerometer gravity gradiometer simpler and cheaper.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: June 28, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Tijing Cai, Mingbiao Yu
  • Patent number: 11372130
    Abstract: Disclosed is a calibration method for a rotating accelerometer gravity gradiometer, wherein linear motion error coefficients, angular motion error coefficients, self-gradient model parameters and scale factors of the rotating accelerometer gravity gradiometer are calibrated once by changing linear motion, angular motion, and self-gradient excitations of the rotating accelerometer gravity gradiometer. The calibrated linear and angular motion error coefficients are used for compensating for motion errors of the gravity gradiometer online, and the calibrated self-gradient model parameters are used for self-gradient compensation. The calibration method provided by the present invention is easy to operate and not limited by any calibration site, thereby being suitable for programmed self-calibration and realizing an important engineering value.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: June 28, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Tijing Cai, Mingbiao Yu
  • Publication number: 20220194625
    Abstract: An autonomous catapult-assisted take-off, recycling, and reuse device and method of a flapping-wing unmanned aerial vehicle (UAV) are provided. The device includes a base, an attitude adjusting mechanism, a catapult mechanism, a recycling mechanism, a control processing unit, a power supply module, and a sensor unit, where the attitude adjusting mechanism includes a connector, a counterweight, an adjusting motor, an attitude adjusting input gear, an attitude adjusting output gear, an attitude adjusting output gear shaft, and an installation platform; the catapult mechanism includes a catapult motor, a catapult motor frame, a pulley, a pull rope, a winch, a pull rope fixing part, a flapping-wing aircraft fixing part, two slide bars, two compression springs, and a catapult gear set; and the recycling mechanism includes a recycling motor, a recycling mechanical arm, a recycling platform, two sprockets, and a recycling gear set.
    Type: Application
    Filed: March 13, 2022
    Publication date: June 23, 2022
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Jun ZHANG, Maozeng ZHANG, Aiguo SONG, Fanzhang HUANG
  • Patent number: 11367785
    Abstract: A lateral insulated gate bipolar transistor (IGBT) with a low turn-on overshoot current is provided to reduce a peak value of a current flowing through a device during turn-on of a second gate pulse while preventing a current capability and a withstand voltage capability from being degraded. The lateral IGBT includes: a buried oxygen arranged on a P-type substrate, an N-type drift region arranged on the buried oxygen, on which a P-type body region and an N-type buffer region are arranged, a P-type collector region arranged in the N-type buffer region, a field oxide layer arranged above the N-type drift region, a P-type well region arranged in the P-type body region, and a P-type emitter region and an emitter region arranged in the P-type well region, where inner boundaries of the foregoing 4 regions are synchronously recessed to form a pinch-off region. A gate oxide layer is arranged on a surface of the P-type body region, and a polysilicon gate is arranged on the gate oxide layer.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: June 21, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Jing Zhu, Ankang Li, Long Zhang, Weifeng Sun, Shengli Lu, Longxing Shi
  • Patent number: 11367215
    Abstract: The present invention discloses a positive azimuth towing guidance method for road rescue equipment based on license plate corner features. The method combines a structure of the road rescue equipment and characteristics of a positive azimuth towing operation. First, an image of an operation area is collected by installing a camera, and grayscale processing and Gaussian smooth filtering are performed on the image; corner detection is performed on the smoothed grayscale image, and preference is implemented according to corner strengths; hierarchical clustering is performed on the preferred corners; an effective corner set of license plate characters is sorted out to implement license plate locating; and then towing guidance is implemented according to a license plate locating result, to improve the rescue efficiency of the road rescue equipment.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: June 21, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Xu Li, Jiwen Cao, Peizhou Ni, Kun Wei
  • Publication number: 20220179061
    Abstract: In Intelligent Vehicle Infrastructure Cooperative Systems (IVICS), a high-precision vehicle positioning method utilizing Ultra-Wide Band (UWB) is proposed. Owing to remarkable wide band of radio signal, this UWB-based positioning method shows excellent anti-interference capability and multi-path immunity, which are essential for achieving high precision in practical traffic scenario. In this approach, several UWB nodes are deliberately deployed at the crossing with the help of roadside infrastructure in IVICS. Meanwhile, an algorithm aiming at Non Line of Sight (NLOS) error compensation is developed to improve the positioning performance. In a word, this method has been demonstrated the potential to achieve accurate, reliable, continuous and integrated localization.
    Type: Application
    Filed: May 29, 2019
    Publication date: June 9, 2022
    Applicant: Southeast University
    Inventors: Xu LI, Huaikun GAO, Qimin XU
  • Publication number: 20220158024
    Abstract: The present invention discloses a bidirectional ultraviolet light emitting diode (UV LED) based on N—ZnO/N—GaN/N—ZnO heterojunction as well as its preparation method. The LED includes: N—ZnO microwires, a N—GaN film, a PMMA protective layer and alloy electrodes; and its preparation method includes the following steps: lay two N—ZnO microwires on the N—GaN film, then spin-coat a PMMA protective layer on the film to fix the N—ZnO microwires until the PMMA protective layer spreads over the N—ZnO microwires, and then place the film on a drying table to solidify the PMMA protective layer; then etch the PMMA protective layer with O2 to expose the N—ZnO microwires, and prepare alloy electrodes on different N—ZnO microwires to construct a N—ZnO/N—GaN/N—ZnO heterojunction to constitute a complete device. The present invention constructs an N/N/N symmetrical structure; the device is composed of N—ZnO and N—GaN, emits light in the ultraviolet region and has a small turn-on voltage.
    Type: Application
    Filed: May 29, 2019
    Publication date: May 19, 2022
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Chunxiang XU, Wei Liu, Zengliang Shi, Zhuxin Li
  • Publication number: 20220155465
    Abstract: The present invention discloses a high-precision point positioning method and device based on a smartphone. The method of the present invention, which belongs to the technical field of satellite positioning, improves the conventional PPP uncombined positioning model, and only uses original GNSS observation values received by a smartphone to carry out high-precision positioning without GNSS reference stations.
    Type: Application
    Filed: January 16, 2020
    Publication date: May 19, 2022
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Chengfa GAO, Bo CHEN, Yongsheng LIU, Puyu SUN
  • Patent number: 11336217
    Abstract: A method and an apparatus for reducing noise of a switched reluctance motor, includes: supplying a PWM signal as a driving signal to a driving circuit of a switched reluctance motor; and varying a carrier frequency of the PWM signal as an operation period of the switched reluctance motor varies; if the switched reluctance motor changes phase, determining that the operation period of the switched reluctance motor varies.
    Type: Grant
    Filed: December 29, 2018
    Date of Patent: May 17, 2022
    Assignees: CSMC TECHNOLOGIES FAB2 CO., LTD., SOUTHEAST UNIVERSITY
    Inventors: Rui Zhong, Mingshu Zhang, Sen Zhang, Jinyu Xiao, Wei Su, Weifeng Sun, Longxing Shi
  • Patent number: 11335387
    Abstract: An in-memory computing circuit for a fully connected binary neural network includes an input latch circuit, a counting addressing module, an address selector, a decoding and word line drive circuit, a memory array, a pre-charge circuit, a writing bit line drive circuit, a replica bit line column cell, a timing control circuit, a sensitive amplifier and a NAND gate array, an output latch circuit and an analog delay chain. A parallel XNOR operation is performed in the circuit on the SRAM bit line, and the accumulation operation, activation operation and other operations are performed by the delay chain in the time domain. Partial calculation is completed while reading the data, and the delay chain with a small area occupation can be integrated with SRAM, thus reducing the energy consumption of the memory access process. Multi-column parallel computing also improves system throughput.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: May 17, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Weiwei Shan, Tao Wang
  • Patent number: 11329549
    Abstract: A hybrid modular multilevel converter having fault blocking capability, and a control method thereof are disclosed. The hybrid modular multilevel converter has an ABC three-phase structure, each phase includes an identical upper arm and lower arm, and the upper arm and the lower arm are each composed of N submodules, including M unipolar full bridge submodules and N-M half bridge submodules, which are connected in series; two identical arm inductors are connected in series between a lower end of the upper arm and an upper end of the lower arm in a same phase; and upper arms and lower arms of three phases are connected in a staggered manner through six thyristor branches, the upper ends of the upper arms of the three phases are short-circuited and are connected to a DC side via a first isolating switch.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: May 10, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: FuJin Deng, ChengKai Liu
  • Patent number: 11322606
    Abstract: A heterojunction semiconductor device comprises a substrate; a second barrier layer is disposed on the second channel layer and a second channel is formed; a trench gate structure is disposed in the second barrier layer; the trench gate structure is embedded into the second barrier layer and is composed of a gate medium and a gate metal located in the gate medium; an isolation layer is disposed in the second channel layer and separates the second channel layer into an upper layer and a lower layer; a first barrier layer is disposed between the lower layer of the second channel layer and the first channel layer and a first channel is formed; a bottom of the metal drain is flush with a bottom of the first barrier layer; and a first metal source is disposed between the second metal source and the first channel layer.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: May 3, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Weifeng Sun, Siyang Liu, Sheng Li, Chi Zhang, Xinyi Tao, Ningbo Li, Longxing Shi
  • Publication number: 20220110815
    Abstract: A rope-driven soft hand function rehabilitation device includes four finger exoskeleton mechanisms, a thumb exoskeleton mechanism, and a soft rubber glove. An index-finger exoskeleton mechanism includes an index-finger distal phalanx loop, an index-finger middle phalanx loop, and an index-finger proximal phalanx loop which are mutually connected via a hinge structure. The thumb exoskeleton mechanism includes a thumb proximal phalanx loop and a thumb distal phalanx loop which are connected via a hinge structure. The rope is fastened to the hand function rehabilitation device via an aluminum sleeve which prevents the rope from slipping off during finger flexion/extension and abduction/adduction when the fingers are pulled by the rope at the palm and the hand back.
    Type: Application
    Filed: July 10, 2020
    Publication date: April 14, 2022
    Applicant: Southeast University
    Inventors: Huijun LI, Yunxia OUYANG, Aiguo SONG
  • Publication number: 20220113272
    Abstract: Disclosed a passive wireless sensor for detecting discrete droplets and bubbles. A first inductor channel and a second inductor channel are disposed opposite each other to form a capacitor channel, the first inductor channel is connected to the second inductor channel to form a resonant circuit. When a detection object passes through the detection channel, the permittivity between the first inductor channel and the second inductor channel changes and consequently a capacitance value of the capacitor channel changes, thus resulting in a change in resonant frequency of the resonant circuit. A readout device is used to read the resonant frequency of the resonant circuit and perform detection according to the resonant frequency to obtain information of a corresponding detection object.
    Type: Application
    Filed: April 26, 2020
    Publication date: April 14, 2022
    Applicant: Southeast University
    Inventors: Zhen ZHU, Mi WANG, Yingying WANG, Qingan HUANG
  • Patent number: 11302072
    Abstract: A system for constructing an urban design digital sand table, the system includes the following modules. A sand table environment constructing module, configured to construct a digital environment of the urban design sand table. An element grading display module, configured to perform hierarchical management on urban design elements, and perform visual hierarchical display. A spatial indicator interpretation module, configured to articulate names, algorithms, and attributes for indicators in an indicator library of the urban design digital sand table. A spatial calculation tool module, configured to load a toolkit to calculate a selected range in the digital sand table. An offline data extraction module, configured to extract the data of the digital sand table so as to export two-dimensional or three-dimensional spatial data in an offline mode. A dynamic real-time editing module, configured to perform real-time editing operation on an urban digital design scheme loaded in the system.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: April 12, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Junyan Yang, Beixiang Shi, Jun Cao, Tanhua Jin
  • Publication number: 20220106244
    Abstract: A biomass-based long-chain alcohol ether oxygenated additive and a preparation method and application thereof are disclosed. The additive used agricultural and forestry wastes as raw materials, and has a general chemical formula of R—(O—C1-3)n—R—OH. The preparation method includes the following steps: step 1, performing drying pretreatment on biomass raw materials, performing rapid pyrolysis under an inert atmosphere to obtain a pyrolysis product containing water, gases, water-phase bio-oil and oil-phase bio-oil, separating out the water-phase bio-oil and performing catalytic hydrogenation on the water-phase bio-oil to obtain polyols; step 2, performing catalytic dehydration on the polyols obtained in step 1 under a basic catalyst system to obtain epoxyalkane; and step 3, making the epoxyalkane obtained in step 2 and methanol undergo a reaction under a molecular sieve catalyst and removing the solid catalyst by separation to obtain the long-chain alcohol ether oxygenated additive.
    Type: Application
    Filed: September 29, 2020
    Publication date: April 7, 2022
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Shiliang WU, Rui XIAO, Yuan LIU, Ziwei WANG
  • Publication number: 20220107237
    Abstract: A method for reducing hysteresis error and high frequency noise error of capacitive tactile sensors includes the following steps: step 1: calibration, specifically including positive stroke calibration to form n positive stroke curves and negative stroke calibration to form n negative stroke curves; step 2: averaging, specifically including positive stroke averaging to form an average positive stroke curve, negative stroke averaging to form an average negative stroke curve, and comprehensive averaging to form a comprehensive stroke curve; step 3: fitting modeling, to obtain a positive stroke fitting function, a negative stroke fitting function, and a comprehensive fitting function; step 4: measurement; step 5: noise filtering; step 6: stroke direction discrimination; and step 7: resolving, to obtain the force at the current time by using a corresponding fitting function based on the stroke direction discrimination result.
    Type: Application
    Filed: July 1, 2020
    Publication date: April 7, 2022
    Applicant: SOUTHEAST UNIVERSITY
    Inventors: Aiguo SONG, Shuyan YANG, Baoguo XU, Huijun LI, Hong ZENG, Lifeng ZHU
  • Patent number: 11294073
    Abstract: A tightly combined GPS/BDS carrier differential positioning method is provided.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: April 5, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Shuguo Pan, Wang Gao, Yanheng Wang, Chengfa Gao, Qing Wang, Ruicheng Zhang, Jian Zhang, Guoliang Liu
  • Patent number: 11293759
    Abstract: A method for decoupling an angular velocity in a transfer alignment process under a dynamic deformation includes: (1) generating, by a trajectory generator, information about an attitude, a velocity, and a position of a main inertial navigation system and an output of an inertial device, and simulating a bending deformation angle {right arrow over (?)} between the main inertial navigation system and a slave inertial navigation system and a bending deformation angular velocity {right arrow over (?)}? by using second-order Markov; (2) decomposing the dynamic deformation into a vibration deformation and a bending deformation, and establishing an angular velocity model under the dynamic deformation of a wing; (3) deducing an error angle ?{right arrow over (?)} between the main inertial navigation system and the slave inertial navigation system; and (4) deducing an expression ?{right arrow over (?)} of a coupling error angular velocity, and applying that to an angular velocity matching process of transfer alignmen
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: April 5, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Xiyuan Chen, Ping Yang, Junwei Wang, Lin Fang
  • Patent number: 11290009
    Abstract: A high energy efficiency switched-capacitor power converter includes the transmission gates T1-T7, the capacitors C1-C4, the load capacitor CL, and resistors, PMOS tubes and NMOS tubes. The power converter converts a stable input voltage of 3V into an output voltage of 1V by means of charge transfer. In the state of timing sequence 1, the on-chip capacitor C1, the capacitor C2 and the load capacitor CL are charged in series. In the state of timing sequence 2, the capacitor C1 and the capacitor C2 are connected in parallel to the capacitor CL to supplement the charge loss due to load for the capacitor CL. When the establishment is completed, the voltages across the capacitor C1, the capacitor C2, and the capacitor CL are basically the same. At this time, the voltage drop across the switch tube approximates 0 V during the charge transfer process.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: March 29, 2022
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Chao Chen, Jun Yang, Xinning Liu