公开(公告)号：US20220010622A1

公开(公告)日：2022-01-13

申请号：US17485739

申请日：2021-09-27

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Buyan WAN ,  Yongping JIN ,  Fenfei PENG ,  Jialiang WANG ,  Huan LIU

IPC: E21B1/38 ,  E21B1/26 ,  E21B7/04 ,  E21B31/113

Abstract: A horizontal drilling machine with an impact device, including a support frame, an armored cable, a cable-straightening mechanism, a cable-feeding mechanism, a power head, a drill pipe, a rotating chuck, a damper, a fishing device with the impact device, a core tube and a thrust cylinder. One end of the thrust cylinder is hinged with the support frame, and the other end of the thrust cylinder is connected to the power head. The power head is arranged on a slid rail of the support frame. An active drill pipe of the power head is connected to the drill pipe. An end of the armored cable is connected to a control system, and the other end is connected to the fishing device in the drill pipe. A fishing head of the fishing device is connected to a spearhead of the core tube.

公开(公告)号：US20210254409A1

公开(公告)日：2021-08-19

申请号：US17153578

申请日：2021-01-20

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yongping JIN ,  Liang LIU ,  Youduo PENG ,  Buyan WAN ,  Jun GONG ,  Jian YAN

IPC: E21B7/12 ,  E21B4/00 ,  E21B25/04 ,  E21B25/18

Abstract: The present disclosure provides a portable seafloor drill rig for a submersible for multi-point core drilling, including a power head, a reduction gear box, an emergency jettison device, a drilling tool, and a temperature and pressure-retaining device. a water supply connector and the power head are arrange on a top plate of the reduction gear box. An output shaft of the power head is connected to an input shaft of the reduction gear box, and an output shaft of the reduction gear box is provided with a central hole, which is in communication with a water inlet hole of the water supply connector. An output shaft of the reduction gear box is connected to the emergency jettison device, and the temperature and pressure-retaining device can perform temperature and pressure-retaining storage of the core drilled by the drilling tool.

公开(公告)号：US20210219528A1

公开(公告)日：2021-07-22

申请号：US17148988

申请日：2021-01-14

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yongping JIN ,  Guangping LIU ,  Youduo PENG ,  Buyan WAN ,  Ping LIU ,  Kun XIE

IPC: A01K79/00

Abstract: A suction sampler system for in situ collection of deep-sea floor organisms includes a pressure-retaining cylinder, a pressure compensation device, a cone component, semiconductor refrigeration components, a circuit cylinder and a collection cylinder. Two ends of the pressure-retaining cylinder are respectively equipped with a first and second seal mechanisms, and the cone component is arranged in the pressure-retaining cylinder. The pressure compensation device is connected to the pressure-retaining cylinder through a high-pressure pipe. The semiconductor refrigeration components are arranged outside the pressure-retaining cylinder. The circuit cylinder is equipped with a power supply and a controller, and the semiconductor refrigeration components are connected to the controller. A pressure sensor and a temperature sensor are arranged inside the pressure-retaining cylinder, and respectively connected to the controller. The collection cylinder communicates with the valve hole of the second seal mechanism through a pipeline.

公开(公告)号：US20210211016A1

公开(公告)日：2021-07-08

申请号：US17212088

申请日：2021-03-25

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaoping ZHANG ,  Donghao LIU ,  Bo FU

IPC: H02K5/24 ,  G06F30/23

Abstract: A denoising optimization method for an AC traction motor by chamfering a stator tooth shoulder includes taking an angular vertex of the stator tooth shoulder as an end point, obtaining two points equidistantly along two sides of a stator tooth shoulder angle from the end point; and using the two points as tangent points D1 and D2 of the inscribed arc; making the inscribed arc of the tooth shoulder angle through the two tangent points D1 and D2, cutting off the tooth shoulder angle along the inscribed arc, and adjusting an oblique height HS1 of a stator tooth pole shoe. The invention obtains optimal values of a chamfering size and oblique height of a stator tooth slot pole shoe by adjusting the oblique height of the stator tooth pole shoe and adopting a particle swarm optimization algorithm.

公开(公告)号：US20210159835A1

公开(公告)日：2021-05-27

申请号：US17163980

申请日：2021-02-01

Applicant: Hunan University of Science and Technology

Inventor： Xiaoping ZHANG ,  Sijian KUANG ,  Ping LIU ,  Zhu ZHANG ,  Haipeng JIANG ,  Shaowu ZHOU

IPC: H02P25/089

Abstract: A sensorless control method and an apparatus for a three-phase switched reluctance motor. The sensorless control method obtains line inductances of three phases according to real-time phase inductances of the three-phase switched reluctance motor and then determines feature points of the line inductances of the three phases. A position angle of the rotor at any time in the next corresponding region is calculated according to an average rotation speed of the rotor in the region corresponding to two adjacent feature points. A control signal is output to realize a precise sensorless control for the three-phase switched reluctance motor. The control apparatus includes a microcontroller, a power conversion circuit, a drive module for the power conversion circuit, a current detection module, a voltage detection module, an input and output module and a direct current regulated power supply.

公开(公告)号：US20210067036A1

公开(公告)日：2021-03-04

申请号：US17096766

申请日：2020-11-12

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaoping ZHANG ,  Ruirui ZHANG ,  Zhi WU

IPC: H02M3/156

Abstract: Disclosed a method for determining a stability range of control parameters of a Buck-Boost converter based on segmented delay feedback control, including by taking inductor current and capacitor current in a Buck-Boost converter as state variables, establishing state differential equations respectively for two different level states of the converter under the pulse input voltage; based on different input voltages, correcting inductor reference current to obtain novel inductor reference current; based on the state differential equations and the novel inductor reference current, obtaining a discrete iteration mapping model of a system; based on the discrete iteration mapping model, obtaining function equations corresponding to an upper limit and a lower limit of control parameters of the converter when the segmented delay feedback control is used to realize the stable operation of the system under the pulse input voltage, and determining a stability range of the corresponding control parameters by the function equations.

公开(公告)号：US10936770B2

公开(公告)日：2021-03-02

申请号：US16909753

申请日：2020-06-23

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaoping Zhang ,  Ji Liu

IPC: G06F30/20 ,  G05B13/04 ,  H02M3/158 ,  G06F111/10

Abstract: A mathematical model between the optimization objects and the optimization objectives is established, with finite-time control parameters as optimization objects, and a total harmonic distortion of an output voltage, a deviation signal of a capacitor voltage and a deviation signal of an output current of BBMC as optimization objectives. A multi-objective optimization satisfaction function and a multi-objective optimization fitness function are established. Multiple sets of optimal finite-time control parameters are iteratively optimized using an adaptive wolf pack algorithm. Functional relationships between respective optimal finite-time control parameters and the corresponding actual output current of BBMC are obtained using a numerical fitting method. Optimal control parameters corresponding to any load are obtained according to the obtained functional relationships. Therefore, the control parameters are adjusted in real time according to the functional relationships and the load of the BBMC-based speed regulation system or the actual output current of BBMC.

公开(公告)号：US10849325B2

公开(公告)日：2020-12-01

申请号：US16236174

申请日：2018-12-28

Applicant: Hunan University of Science and Technology

Inventor： Cailun Huang ,  Yongjun Tian ,  Jing Wang ,  Nian Zhang ,  Li Ouyang ,  Junwei Zhu ,  Kaixuan Zhang ,  Xiongsheng Yi

IPC: F25B47/02 ,  A21B3/04 ,  A21B1/26 ,  A21B1/40 ,  F28D20/00 ,  F28F3/10

Abstract: The invention disclosed an intelligent dehumidification device for a hot air circulation baking system, which internally includes a compressor, a condenser, a throttle valve, an evaporator, a total heat exchanger, a controller, a heat dissipation fan, a liquid level sensor, a temperature and humidity sensor, an axial flow fan, a drain solenoid valve, a condensate collecting box and a temperature sensor and externally includes a dehumidification air inlet, a dehumidification air outlet, a fresh air inlet, a heat dissipation air outlet and a condensate discharge port. The beneficial effects of present application are recovery of internal circulation waste heat, non-emission intelligent dehumidification and preservation of beneficial ingredients of the baked product for the hot air circulation baking system during the baking process can be realized, and functions of grid overpressure and undervoltage detection and protection, compressor overheat protection, delayed start after compressor shutdown, automatic condensate discharge can be achieved.

公开(公告)号：US10704350B2

公开(公告)日：2020-07-07

申请号：US16731068

申请日：2019-12-31

Applicant: Hunan University of Science and Technology

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

IPC: E21B25/06 ,  E21B25/18 ,  E21B10/02 ,  E21B19/14

Abstract: A process for drilling natural gas hydrates. A drilling rig is placed in seawater. A suction-press core drilling mode is adopted in a soft sediment formation, a suction-rotary core drilling mode is adopted in a medium-hard sediment formation, or a pumping direction circle-rotary core drilling mode is adopted in a hard sediment formation. A core is extracted. An inner tube for wireline pressure coring is recovered. A holding seal cap is tightened, and the inner tube is stored in a pipe storage rack. Punching is carried out. An inner tube for wireline pressure coring which is hollow is captured to disengage the holding seal cap. The inner tube is lowered. A drill rod is added. The punching is carried out again. The above steps are repeated until the core drilling reaches a given drilling depth. The drill rod, the drill and the corer are recovered.

公开(公告)号：US20190234835A1

公开(公告)日：2019-08-01

申请号：US16109968

申请日：2018-08-23

Applicant: Shanghai Jiao Tong University Underwater Engineering Institute Co.,Ltd ,  Hunan University of Science and Technology

Inventor： Ping REN ,  Buyan WAN ,  Xiafei MA ,  Yongping JIN ,  Youduo PENG

IPC: G01N1/08

CPC classification number: G01N1/08

Abstract: Provided is a mechanical handheld hermetic sampler for marine sediment. The sampler comprises sampling assembly and a pressure maintaining assembly. The sampling assembly includes a sampling tube, a handle and an end cap. The sampling tube is fixed at a lower end surface of the end cap while the handle is fixed at an upper end surface of the end cap. The handheld robotic sampler for marine sediment with hermetic sampling is simple and compact in structure, small in size, light in weight, easy to manipulate and manufacture, highly reliable, and particularly suitable for robotic sampler hand control of underwater operating equipment such as a manned submersible, an unmanned submersible and Remotely Operated Vehicle.