公开(公告)号：US20250085328A1

公开(公告)日：2025-03-13

申请号：US18820679

申请日：2024-08-30

Applicant: Hunan University of Science and Technology

Inventor： Zhaohua LIU ,  Zhijian YI ,  Junjie LONG ,  Lei CHEN ,  Mingyang LV ,  Ming LI

IPC: G01R31/11 ,  G01R31/08

Abstract: Provided is a precise fault location method for a collector line in an onshore wind farm. The method includes sends sending, by a slave unit, a high-voltage pulse signal at the beginning of a collector line to measure a cable length at a fault point of the collector line. A master unit and the slave unit send high-voltage pulse signals to each other to measure a cable length at any point on the collector line, thereby obtaining a geographical location corresponding to the cable length. The two measured cable lengths are compared and if the measured lengths are inconsistent, the master unit is moved, to make the two measured lengths equal with multiple approaches. In this case, the position of the master unit is a geographical location corresponding to the fault point.

公开(公告)号：US12084933B2

公开(公告)日：2024-09-10

申请号：US18457150

申请日：2023-08-28

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yongping Jin ,  Zhaodong Tong ,  Youduo Peng

IPC: E21B25/18 ,  B63G8/00

CPC classification number: E21B25/18 ,  B63G8/001

Abstract: A drilling and sampling device applied to a seafloor tracked vehicle, including a slide seat, a positioning electromagnet, a pipe-replacing cylinder, a dial claw, a plurality of clamping assemblies, a plurality of sampling drill pipes, a drill pipe rack, a frame, a thrust cylinder, a pipe-releasing assembly, a guide rod, a drive pipe, a power head, and a pipe-replacing disc. The guide rod and the thrust cylinder are fixedly arranged on the frame. The slide seat is in clearance fit with the guide rod. A piston rod end of the thrust cylinder is hingedly connected to the slide seat. The power head is fixedly arranged on the slide seat. The drive pipe is arranged at an output end of the power head, and is coaxially screwed with the plurality of sampling drill pipes. The dial claw is slidably arranged in the arc guide groove.

公开(公告)号：US20240103194A1

公开(公告)日：2024-03-28

申请号：US18520524

申请日：2023-11-27

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hui CHENG ,  Chenxing JIA ,  Diquan LI ,  Guohong FU ,  Xiuying LIAO

IPC: G01V3/02 ,  H03K19/177 ,  H03K19/21

CPC classification number: G01V3/02 ,  H03K19/177 ,  H03K19/21

Abstract: A detection device for high-frequency pseudo-random spread spectrum coded sequence signal of shallow geologic body includes a signal transmitter and a synchronous signal receiver. The signal transmitter includes a first Mono-Chip Computer (MCU), a first Field Programmable Gate Array (FPGA), a power amplifier module, a direct-current (DC) power supply, a first display module, a first Global Position System (GPS) synchronization module, a first communication module, and a first memory module. The synchronous signal receiver includes a preamplifier circuit, a bandpass filter circuit, a program-controlled amplifier circuit, an analog to digital (AD) converter circuit, a second FPGA, a second MCU, a second communication module, a second display module, a second GPS synchronization module, and a second memory module. A method using the detection device is further provided.

公开(公告)号：US11774336B2

公开(公告)日：2023-10-03

申请号：US17719326

申请日：2022-04-12

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yongping Jin ,  Zhaodong Tong ,  Buyan Wan

IPC: G01N3/56

CPC classification number: G01N3/567

Abstract: A friction and wear testing platform capable of simulating high-pressure, silt-containing and turbid submarine environment, including a tank, a loading device, a partition plate, a partition cylinder, a top sealing sleeve, a bottom sealing sleeve, a rotating shaft, an inner magnetic cylinder, an outer magnetic cylinder and a centering table. The partition plate and the partition cylinder divide an inner chamber of the tank into a test chamber and a pressure compensation chamber. The rotating shaft penetrates the pressure compensation chamber; two ends of the rotating shaft are sealed by the top and bottom sealing sleeves, respectively, as well as sealing bearings and rings therein. The loading device drives the rotating shaft to rotate, and the rotating shaft drives the inner magnetic cylinder to rotate. The centering table is driven through the magnetic coupling between the inner and outer magnetic cylinders to install a test piece.

公开(公告)号：US11762122B2

公开(公告)日：2023-09-19

申请号：US17687126

申请日：2022-03-04

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Guohong Fu ,  Songyuan Fu ,  Hui Cheng ,  Tianchun Yang

IPC: G01V3/38 ,  G01V3/10 ,  G01V3/165

CPC classification number: G01V3/38 ,  G01V3/10 ,  G01V3/165

Abstract: A device for reducing turn-off time of a transient electromagnetic transmitting signal includes a transmitting coil, a first electronic switch to control connection mode of the transmitting coil and a second electronic switch configured to form a bridge arm. The transmitting coil is a twisted pair including a first wire and a second wire. The first wire is connected to one end of the second electronic switch. The other end of the second electronic switch is connected to one end of the first electronic switch. The other end of the first electronic switch is connected to the second wire. The connection mode of the transmitting coil includes head-to-head connection, head-to-tail connection and tail-to-tail connection between the first wire and the second wire. The first wire and the second wire are connected to form a transmitting loop.

公开(公告)号：US20230083078A1

公开(公告)日：2023-03-16

申请号：US17476917

申请日：2021-09-16

Applicant: Hunan University of Science and Technology

Inventor： Chaoyang Chen ,  Yong Xiao ,  Ming Chi ,  Li Ding ,  Yanwu Wang ,  Zuguo Chen ,  Pei Li ,  Juan Chen ,  Bowen Zhou

IPC: G01R31/08 ,  H02J13/00

Abstract: A method for intelligent fault detection and location of a power distribution network is provided, which includes: constructing a network topology of the power distribution network, updating the network topology in real time to obtain an updated network topology, performing a fault identification based on the updated network topology, performing a fault locating based on the updated network topology to determine a fault node, and identifying a fault type based on a fault recorded signal of the fault node. With this method, fault locations and fault types of the power distribution network can be accurately detected in real time.

公开(公告)号：US11505997B2

公开(公告)日：2022-11-22

申请号：US17485712

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: E21B7/04 ,  E21B3/02 ,  E21B19/08 ,  E21B19/10 ,  E21B19/16 ,  E21B31/18 ,  E21B49/00

Abstract: A horizontal drilling machine with an in-situ detection device, including a support frame, an armored cable, a steel pipe-straightening mechanism, a steel pipe-feeding mechanism, a motor, a power head, a drill pipe, a rotating chuck, a damper, a non-core drilling tool, the in-situ detection device, a fishing device and a thrust cylinder. The steel pipe-straightening mechanism, the steel pipe-feeding mechanism, the rotating chuck and the damper are sequentially fixed on the support frame from left to right. One end of the thrust cylinder is hinged with the support frame, and the other end is connected to the power head. The active drill pipe of the power head is connected to the drill pipe. An end of the armored cable is connected to the fishing device in the drill pipe, and the fishing head of the fishing device is connected to the spearhead of the non-core drilling tool.

公开(公告)号：US20220302812A1

公开(公告)日：2022-09-22

申请号：US17456531

申请日：2021-11-24

Applicant: Hunan University of Science and Technology

Inventor： Xiaoping ZHANG ,  Donghao LIU ,  Bo FU

IPC: H02K29/03 ,  H02K1/16

Abstract: To solve the problem of large electromagnetic noise in AC traction motor, embodiments have open square notches at symmetrical positions on both sides of stator teeth of AC traction motor to effectively reduce electromagnetic noise without affecting other performance indicators of motor. In addition, embodiments fit the functional relationship between the optimal notch size or optimal slotting position size of motors and their power by determining the optimal notch size or optimal slotting position size of motors with different power grades, so as to achieve the noise reduction effect.

公开(公告)号：US20220236159A1

公开(公告)日：2022-07-28

申请号：US17719326

申请日：2022-04-12

Applicant: HUNAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yongping JIN ,  Zhaodong TONG ,  Buyan WAN

IPC: G01N3/56

Abstract: A friction and wear testing platform capable of simulating high-pressure, silt-containing and turbid submarine environment, including a tank, a loading device, a partition plate, a partition cylinder, a top sealing sleeve, a bottom sealing sleeve, a rotating shaft, an inner magnetic cylinder, an outer magnetic cylinder and a centering table. The partition plate and the partition cylinder divide an inner chamber of the tank into a test chamber and a pressure compensation chamber. The rotating shaft penetrates the pressure compensation chamber; two ends of the rotating shaft are sealed by the top and bottom sealing sleeves, respectively, as well as sealing bearings and rings therein. The loading device drives the rotating shaft to rotate, and the rotating shaft drives the inner magnetic cylinder to rotate. The centering table is driven through the magnetic coupling between the inner and outer magnetic cylinders to install a test piece.

公开(公告)号：US11371298B2

公开(公告)日：2022-06-28

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.