公开(公告)号：US10927606B2

公开(公告)日：2021-02-23

申请号：US16731060

申请日：2019-12-31

Applicant: Hunan University of Science and Technology

Inventor： Buyan Wan ,  Yongping Jin ,  Xiaojun Huang ,  Jialiang Wang

IPC: E21B7/124 ,  E21B21/00 ,  E21B25/18

Abstract: Disclosed is a sediment core-drilling process for a submarine wire-line coring drill rig, including 1) lowering the drill rig; 2) drilling in a pressure-suction mode; 3) drilling in a rotation-pressure-suction mode; 4) cutting sediment cores; 5) recovering a core inner tube; 6) cleaning bottom of hole; 7) punching before adding a drill pipe; 8) lowering another core inner tube; 9) adding the drill pipe; 10) punching after adding the drill pipe; 11) repeating the steps 2)-10) until a given hole depth is reached; 12) recovering the drill pipe and a wire-line coring outer tube drilling tool; 13) recovering the submarine wire-line coring drill rig. The core-drilling process provided herein is suited to working conditions without mud lubrication and mud protection for hole wall. This invention has advantages of low disturbance and high efficiency in coring and is suitable for remote operation.

公开(公告)号：US20210040800A1

公开(公告)日：2021-02-11

申请号：US16876737

申请日：2020-05-18

Applicant: Hunan University of Science and Technology

Inventor： Buyan WAN ,  Yongping JIN ,  Deshun LIU ,  Xiaojun HUANG

IPC: E21B19/14

Abstract: A support device for the rotation of a high-capacity and compact drill pipe storage unit of a seabed drilling rig in a lying state, including: a rack, a plurality of curved support frames, a plurality of lateral drill pipe stoppers and a plurality of annular fences. The curved support frames are provided parallelly and coaxially on a slideway of the rack. A separating plate is provided on each of the curved support frames. A curved support surface of each of the curved support frames is in contact with a circular edge surface of the corresponding separating plate. The annular fences are mounted on the rack. Each of the annular fences is provided with a first gap and a second gap. The first gap is provided corresponding to the lateral drill pipe stopper. The second gap is configured to allow the drill pipes enter and exit the drill pipe storage unit.

公开(公告)号：US20210013820A1

公开(公告)日：2021-01-14

申请号：US17037873

申请日：2020-09-30

Applicant: Hunan University of Science and Technology

Inventor： Xiaoping ZHANG ,  Ping LIU ,  Sijian KUANG ,  Zhu ZHANG

IPC: H02P23/14 ,  H02K3/47 ,  G06F30/23

Abstract: A modeling method of a stator winding air gap for temperature field analysis of an AC traction motor includes: changing the width of an air gap of a stator winding equivalent model according to a set value of spacing; establishing a three-dimensional finite element model of the AC traction motor with the stator winding air gap; based on the three-dimensional finite element model of different widths of the air gap, analyzing a temperature field to obtain a temperature field distribution diagram of the AC traction motor; carrying out the numerical fitting according to data in the temperature distribution diagram to obtain a function relation between the air-gap width and the temperature of the stator winding equivalent model; and by measuring the actual temperature of a motor stator winding, calculating an optimal air-gap width corresponding to the modeling of the stator winding of the current AC traction motor.

公开(公告)号：US20200343843A1

公开(公告)日：2020-10-29

申请号：US16926369

申请日：2020-07-10

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaoping Zhang ,  Ji Liu ,  Ruirui Zhang

IPC: H02P21/13 ,  H02P27/04 ,  H02P27/12

Abstract: An actual rotation speed of the asynchronous motor is detected according to the given rotation speed thereof. A given voltage of the asynchronous motor is obtained according to a vector control algorithm and a PI-IP control algorithm and is used as a reference output voltage of the BBMC. A duty cycle of a power switch tube in the BBMC is obtained according to a finite-time control algorithm by taking capacitor voltages and inductor currents in the BBMC as control variables of the speed regulation system. The conducting time of the power switch tube in the BBMC is controlled according to the duty cycle and an output control signal of a corresponding switching cycle, so that an output voltage consistent with its reference output voltage is obtained at an output end of the BBMC, so that the actual rotation speed of the asynchronous motor accurately tracks the given speed.

公开(公告)号：US20190196040A1

公开(公告)日：2019-06-27

申请号：US16226611

申请日：2018-12-19

Applicant: Hunan University of Science and Technology

Inventor： Cailun HUANG ,  Jing WANG ,  Yongjun TIAN ,  Kai SUN ,  Li OUYANG ,  Kaixuan ZHANG ,  Xiongsheng YI

IPC: G01V1/36 ,  G01V3/12 ,  G01V3/38 ,  G01V3/08 ,  G01V1/48 ,  G01V1/28

CPC classification number: G01V1/364 ,  G01V1/282 ,  G01V1/48 ,  G01V3/08 ,  G01V3/12 ,  G01V3/38

Abstract: Disclosed are a method and system of magnetotelluric synchronous detection and real-time inversion. The system includes a detection and inversion host (M) with wireless networking function and N2-1 detection and inversion extensions (Si) with wireless communication functions. The distance between each two detection and inversion extensions (Si) is D, i=1, 2, . . . , N2-1, and N is an odd number. The detection and inversion host is configured for collecting magnetic field signals and electric field signals at measurement points, wireless networking and cooperation, synchronous detection and real-time inversion control of the detection and inversion extensions (Si) in detection area. The detection and inversion extensions (Si) are configured for synchronous collection of electric field signals at measurement points and real-time inversion of detection data at measurement points under cooperative control of the detection and inversion host.

公开(公告)号：US20180291559A1

公开(公告)日：2018-10-11

申请号：US16009181

申请日：2018-06-14

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hu Zhou ,  Zhiling Qi ,  Dongdong Wang ,  Zhihua Zhou ,  Xuan Liu ,  Qingquan Liu ,  Xiaohong Wang

IPC: D21H17/63 ,  D21H27/00 ,  D21H17/57 ,  D21H25/06

Abstract: The present invention discloses a method for preparing active carbon-based special synthetic paper, comprising stirring polyurethane particles and a solvent in a reactor, and standing to completely dissolve the polyurethane particles to obtain a polyurethane solution; adding active carbon in the obtained polyurethane solution, stirring and mixing uniformly to obtain a solid-liquid mixture; coating the obtained solid-liquid mixture onto a piece of release paper, soaking the release paper and the solid-liquid mixture into an aqueous solution of silver nitrate, completely curing the solid-liquid mixture to form a film, and soaking the release paper and the film into an aqueous solution of sodium chloride; drying the obtained release paper and the film in an electric blast drying oven, and stripping the film from the release paper to obtain the active carbon-based special synthetic paper. In the present invention, the adsorption of harmful substances in the environment is greatly improved.

公开(公告)号：US20250067896A1

公开(公告)日：2025-02-27

申请号：US18945450

申请日：2024-11-12

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Guohong FU ,  Lijuan YANG ,  Shijie WANG ,  Hui CHENG ,  Songyuan FU ,  Tianchun YANG

IPC: G01V3/12 ,  H03F3/24 ,  H03F3/45 ,  H04B1/04

Abstract: A transmission device for multi-frequency equal-amplitude non-harmonic electrical prospecting signal includes a single-chip microcontroller, a field programmable gate array (FPGA), a digital to analog conversion (DAC) module, an isolation amplifier circuit, a differential amplifier module, a digital power amplifier circuit, and a sensor module connected successively. A plurality of output ends of the digital power amplifier circuit is in cascade connection with a grounding electrode A and a grounding electrode B to form a loop with ground. An input end of the sensor module is connected with the digital power amplifier circuit. An output end of the sensor module is connected with the single-chip microcontroller.

公开(公告)号：US20250060502A1

公开(公告)日：2025-02-20

申请号：US18937177

申请日：2024-11-05

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hui CHENG ,  Guohong FU ,  Yan LIU ,  Xiuying LIAO

IPC: G01V3/08

Abstract: A device and method for measuring spectrum parameters of a formation outcrop and a rock mass are provided. An excitation signal is generated by a direct digital synthesis (DDS) module of a signal transmission portion. A constant voltage mode or a constant current mode is adopted for observation. After the signal passes through a constant voltage/constant current module, a constant high-voltage signal source or a current source signal with constant current output is formed and output to ground through grounding electrodes A and B to establish a stable observation signal field source. Geoelectric response information under the excitation of each frequency signal is acquired by a signal receiving portion through grounding electrodes M and N, processed and send out to a microcontroller unit (MCU) for display and storage. The spectrum parameters at different depths are observed by adjusting geometric dimensions of AB and MN.

公开(公告)号：US20240360034A1

公开(公告)日：2024-10-31

申请号：US18769533

申请日：2024-07-11

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  HUNAN XIANGCHU XIANLU ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.

Inventor： Meixun PENG ,  Yuanpeng ZHANG ,  Qiming ZHAO ,  Wenwei LIU ,  Meilin CHEN

IPC: C04B7/42 ,  C04B7/43 ,  C04B7/47 ,  C04B7/52 ,  C04B111/00

CPC classification number: C04B7/424 ,  C04B7/434 ,  C04B7/47 ,  C04B7/527 ,  C04B2111/00017

Abstract: A method for preparing a general-purpose cement is provided. Raw materials containing all of SiO2, Al2O3, CaO, MgO and Na2O (or K2O) are mixed to obtain a raw meal, which is dried and ground into a raw meal powder. The raw meal powder is oxidatively calcined at no less than 1210° C. to reach a stable phase state, and rapidly cooled to obtain a clinker predominated by glass phase. The clinker is mixed with NaOH, KOH or a combination thereof and ground to obtain the general-purpose cement. Alternatively, the clinker is ground to obtain a clinker powder, which is mixed with an aqueous NaOH solution, an aqueous KOH solution or a combination thereof for use. The NaOH and/or KOH is/are added such that a weight ratio of NaOH+0.713KOH to the clinker powder is 0-0.03:1.

公开(公告)号：US12130401B1

公开(公告)日：2024-10-29

申请号：US18531737

申请日：2023-12-07

Applicant: Hunan University of Science and Technology

Inventor： Jun Fang ,  Runlin Zhang ,  Wei Liang ,  Yongshun Han ,  Baiyan Wu ,  Wentao Yang

IPC: G01V20/00 ,  G08B21/10

CPC classification number: G01V20/00 ,  G08B21/10

Abstract: A landslide risk monitoring and early warning method based on real 3D includes the following steps: S1, multi-source data fusion processing: collecting landslide-related data for an integrated fusion processing; S2, large-scale scene modeling, and analysis; S3, mesoscale scene modeling and analysis; S4, small-scale scene modeling and analysis; S5, landslide knowledge association and entity database construction; S6, landslide risk multi-scale dynamic assessment; S7, landslide multi-indicator monitoring and early warning. A landslide hazard monitoring and early warning system based on real 3D is also disclosed. The above-mentioned landslide risk monitoring and early warning method and system based on real 3D can realize different scale data acquisition and real 3D modeling of landslide geological disasters, establishment of full-factor real 3D landslide scene database, multi-scale spatial-temporal dynamic monitoring and analysis of landslide risk, and timely and intelligent multi-indicator early warning.