公开(公告)号：US20210268626A1

公开(公告)日：2021-09-02

申请号：US17321394

申请日：2021-05-14

Applicant: Changsha University of Science and Technology

Inventor： Cong MAO ,  Lairong YIN ,  Yujie ZHONG ,  Yongle HU ,  Yuanqiang LUO ,  Weidong TANG ,  Peihao CAI ,  Mingjun ZHANG ,  Yifeng JIANG ,  Aiming TANG

IPC: B24D5/02

Abstract: An orderly-micro-grooved PCD grinding wheel includes a wheel hub, a polycrystalline diamond (PCD) film, a number of micro-grinding units and a number of microgrooves. The PCD film is deposited on an outer circumferential surface of the wheel hub. The PCD film is processed by a water-jet guided laser device to form the microgrooves with high depth-width ratio and micro-grinding units with positive rake angles on the entire outer circumferential surface of the PCD film. An axial length of each micro-grinding unit and an axial length of each microgroove are equal to a thickness of the grinding wheel, respectively. The microgrooves are spaced apart by the micro-grinding units.

公开(公告)号：US11079353B2

公开(公告)日：2021-08-03

申请号：US16955797

申请日：2019-08-24

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhong Cao ,  Yuyu Peng ,  Chen Liu ,  Ling Tang ,  Qin Zhu ,  Min Jin ,  Jinglin He ,  Zhongliang Xiao

IPC: G01N27/414

Abstract: A method and a sensor for detecting L-cysteine based on a 3,3′-dithiobis (1-propanesulfonate)-mercury composite membrane are provided. The method includes: implanting a p-well and an N-type substrate on field effect transistor substrate, constructing a source electrode and a drain electrode at the p-well, constructing a silicon dioxide layer on the substrate, plating an aluminum-copper alloy layer, a chromium-palladium alloy layer, and a gold film layer on a polysilicon gate substrate, constructing a silicon nitride layer on the substrate and the silicon dioxide layer; extending a gate part; preparing an ethanol solution of disodium 3,3′-dithiobis (1-propanesulfonate), cleaning and soaking gate gold electrode in the solution, followed by soaking in an ethanol solution of mercuric nitrate, and then washing the gate gold electrode; connecting electrode interfaces, inserting the electrode into PBS, and connecting power interfaces to a stabilized voltage supply, connecting a signal output interface to a multimeter.

公开(公告)号：US20210129092A1

公开(公告)日：2021-05-06

申请号：US17088058

申请日：2020-11-03

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Cong Mao ,  Zhikang Zhang ,  Yongle Hu ,  Jian Zhang ,  Mingjun Zhang ,  Kun Tang ,  Weidong Tang ,  Linfeng Xiao

IPC: B01F3/12 ,  B01F11/02

Abstract: An anti-agglomeration device for a nanofluid includes a support module, a motion module, a photoacoustic conversion module and a control module. The support module includes a frame and screws and is configured to support the photoacoustic conversion module and the motion module. The photoacoustic conversion module includes a nanosecond laser, a first clamp, a lens, a silica optical fiber, a second clamp, gold nanoparticles and a container and is configured to realize photoacoustic conversion to generate ultrasonic waves. The motion module includes a servo motor, a dovetailed rail, a guide screw, a fixed plate, a slider and a deep groove ball bearing. The motion module is configured to support the photoacoustic conversion module and realize the combined motions of the photoacoustic conversion module. The control module includes a support plate and a CCD camera and is configured to control the motion module in real time.

公开(公告)号：US20210123093A1

公开(公告)日：2021-04-29

申请号：US17258932

申请日：2019-08-24

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhong CAO ,  Jia YANG ,  Chen LIU ,  Zhongliang XIAO ,  Dan LI ,  Ling ZHANG ,  Yuyang ZHANG ,  Jiaxin LI

IPC: C12Q1/6809 ,  G01N27/26

Abstract: A method and a sensor for detecting L-cystine are disclosed. The method is implemented by assembling a sodium 3,3′-dithiodipropane sulfonate (SPS) membrane on a surface of Au membrane layer of an Au electrode and using an extended gate of field effect transistor (FET) and in-situ signal amplification of the FET to detect L-cystine sensitively. The polyanion of the SPS membrane adsorbs and binds a positively charged target L-cystine through electrostatic interaction, thus forming an electric double layer structure to generate a membrane potential identifying a monovalent organic ammonium ion. The sensor includes the FET, wherein a gate-extended gold electrode is arranged on the FET, and the SPS membrane is assembled on the surface of the Au membrane layer of the gate-extended gold electrode. The sensor has an excellent Nernst response to L-cystine.

公开(公告)号：US20210122573A1

公开(公告)日：2021-04-29

申请号：US17139563

申请日：2020-12-31

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Lairong YIin ,  Yang Liu ,  Juan Huang ,  Shuo Cai ,  Peng Xu ,  Lin Hu ,  Le Xiao ,  Long Huang

IPC: B65G15/26

Abstract: Disclosed a large-span bulk material conveying system, including a folding arm conveyor and a dike-striding elevation-type feeding conveying device. The folding arm conveyor is mainly composed of an undercarriage mounted on the ground of a stockyard, a tower body mounted on the undercarriage and provided with a gyration apparatus and a hopper, a balance arm provided with a balance trolley, a conveying arm provided with a portal frame I, a portal frame II and an unloading trolley, a tower top and other main components, wherein the balance arm, the conveying arm and the tower top are mounted on the tower body. The folding arm conveyor can rotate horizontally, and the conveying arm can be folded and retracted by controlling the wire rope by the windlass, so that the folding arm conveyor can be prevented from colliding with other devices or buildings during the rotation.

公开(公告)号：US20210090326A1

公开(公告)日：2021-03-25

申请号：US16862878

申请日：2020-04-30

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Huanan YU ,  Shunjun LI ,  Guoping QIAN ,  Xiangbing GONG ,  Xuan ZHU

IPC: G06T17/00

Abstract: A modeling method for an asphalt mixture by coupling a discrete element method (DEM) and a finite difference method (FDM). Aggregates of an asphalt mixture are processed by a DEM, and a finite difference method is used to implement continuous medium simulation of an asphalt binder in the asphalt mixture. The influence of the coupling of the DEM and the finite difference method on mechanical properties of the asphalt mixture such as the strength and modulus are considered, to implement simulation of the deformation, shrinkage, cracking, etc. of a multiphase material in the asphalt mixture under different load. The method can accurately restore a void structure and true shapes and sizes of the aggregates and a binder in the asphalt mixture, and can characterize distribution characteristics thereof.

公开(公告)号：US20210087759A1

公开(公告)日：2021-03-25

申请号：US16861975

申请日：2020-04-29

Applicant: Changsha University of Science and Technology

Inventor： Guoping Qian ,  Huanan Yu ,  Changyun Shi ,  Xiangbing Gong ,  Xi Li ,  Jun Cai ,  Wenchao Wu

IPC: E01C23/01 ,  G01N33/42

Abstract: A device is for detecting compaction and shear strength characteristics of an asphalt mixture during construction compaction. The device includes a fixed frame and a detection system. The detection system includes a display, a control panel, a test claw, an electric motor, a lift switch, a torque sensor and a temperature sensor. The control panel includes a power switch for controlling the electric motor and a speed regulator for controlling a rotation speed of the test claw. An output end of the electric motor is connected to an input end of the torque sensor, and an output end of the torque sensor is connected to an input end of the test claw. An output end of the test claw is provided with a claw-shaped blade. The claw-shaped blade is provided therein with the temperature sensor.

公开(公告)号：US20210045265A1

公开(公告)日：2021-02-11

申请号：US16942519

申请日：2020-07-29

Applicant: CHANGSHA UNIVERSITY OF SCIENCE and TECHNOLOGY

Inventor： Xiaoqin Sun ,  Jie Li ,  Shuguang Liao

IPC: H05K7/20 ,  F25B25/00

Abstract: A computer room heat-pipe air conditioning system with an emergency cooling control method. The system comprises a phase-change energy storage module, a phase-change material packaging body, a condenser housing, a condenser, a cold releasing pump, evaporators, evaporation fans, four three-way valves, a cooling unit, standby power generators and storage batteries. The three-way valves are opened and closed based on a preset heat-pipe cooling criteria in combination with phase-change energy storage technology.

公开(公告)号：US10892616B2

公开(公告)日：2021-01-12

申请号：US16613409

申请日：2018-07-04

Applicant: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiangjun Zeng

IPC: H02H9/08 ,  H02H9/00

Abstract: The proposed invention discloses a safe processing method for active voltage reduction of a ground fault phase of a non-effective ground system, for use in safe processing of a ground fault of a neutral point non-effective ground generator or distribution network. Non-effective ground system side windings of a transformer are equipped with a plurality of shunting taps. When a single-phase ground fault occurs, the shunting tap of the fault phase winding is selected to be short-circuited to ground directly or through an impedance to reduce the fault phase voltage to ensure that the fault point voltage is less than the continuous burning voltage of a ground arc to meet a long-term non-stop safe operation requirements. The proposed method can eliminate the instantaneous single-phase ground fault, suppress the permanent single-phase ground fault current, and limit the rising amplitude of non-fault phase voltage and the risk of non-fault phase insulation breakdown.