公开(公告)号：US12113610B1

公开(公告)日：2024-10-08

申请号：US18612803

申请日：2024-03-21

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Qiyue Yu ,  Jiangxuan Li ,  Shu Lin

IPC: H04J13/12 ,  H04J13/16

CPC classification number: H04J13/12 ,  H04J13/16

Abstract: The present disclosure relates to the field of communication technologies and in particular to a user-distinguished finite-field resource construction method and a finite-field multiple access system. In order to solve the problem of the limitation of the multiple access resource in the current communication field, the present disclosure employs a user-distinguished finite-field resource construction method to construct a basic-field resource and/or extension-field resource, i.e. finite-field resource. During the use of the finite-field resource, each user sending a binary sequence is assigned one codebook marking symbols that 0 and 1 are respectively mapped into a finite field. The transmitter sends a corresponding finite-field symbol sequence. At the receiver, based on the received finite-field symbols, a finite-field symbol sent by each user can be determined uniquely and thus, a binary symbol sent by each user can be decoded. The present disclosure is applied to the finite-field multiple access system.

公开(公告)号：US12111453B1

公开(公告)日：2024-10-08

申请号：US18424711

申请日：2024-01-26

Applicant: Harbin Institute of Technology

Inventor： Jian Liu ,  Chenguang Liu ,  Chongliang Zou ,  Zijie Hua

IPC: G02B21/00 ,  G02B21/18

CPC classification number: G02B21/0032 ,  G02B21/0036 ,  G02B21/006 ,  G02B21/0068 ,  G02B21/18

Abstract: Disclosed are a differential dark-field confocal microscopic measurement apparatus and method based on a polarized vector light beam. The apparatus includes a vector polarized illumination light generation module, a light beam scanning illumination module and a differential dark-field confocal imaging module; a half wave plate and a vortex wave plate are regulated to generate radially polarized signal light and azimuthally polarized signal light respectively, and an acousto-optic modulator is controlled to modulate light beams into a pulse form, so that the radially polarized signal light and the azimuthally polarized signal light alternately illuminate during the same period, both of which have a time occupation ratio of 50%, separately. Difference values of scattering signals under separate illumination of the radially polarized signal light and the azimuthally polarized signal light are analyzed, and super-resolution detection imaging can be performed on the three-dimensional distribution information of defects such as subsurface scratches, and abrasion.

公开(公告)号：US20240238733A1

公开(公告)日：2024-07-18

申请号：US18557121

申请日：2022-03-01

Applicant: Harbin Institute of Technology

Inventor： Jun MA ,  Dongwei LV ,  Hui ZHANG

IPC: B01D67/00 ,  B01D71/02

CPC classification number: B01D67/0079 ,  B01D67/0093 ,  B01D71/021 ,  B01D2325/10

Abstract: A preparation method for a hollow fiber inorganic membrane to solve the problem that the existing membrane technology cannot simultaneously have high flux and a high retention rate, including the steps of: adding an inorganic material, a polymer, and a binder into an organic solvent, first performing ball milling, and then vacuumizing to obtain a casting solution; using tap water as an internal coagulant, spinning the casting solution, then using tap water and/or the organic solvent as an external coagulant, putting membrane filaments in the external coagulant, performing phase inversion under 19.5-20.5° C., taking out the membrane filaments, and then drying same to obtain a basement membrane green body; and calcining the basement membrane green body at 800-950° C. to obtain a hollow basement membrane, and preparing a separation layer on the outer surface of the hollow basement membrane to obtain the hollow fiber inorganic membrane.

公开(公告)号：US12038413B2

公开(公告)日：2024-07-16

申请号：US17551319

申请日：2021-12-15

Applicant: Harbin Institute of Technology

Inventor： Bo Zhao ,  Weijia Shi ,  Jiaxin Li ,  Jiubin Tan

IPC: G01N29/34 ,  G01N29/07 ,  G01N29/30 ,  G01N29/44 ,  G01N29/46

CPC classification number: G01N29/348 ,  G01N29/075 ,  G01N29/30 ,  G01N29/4436 ,  G01N29/46 ,  G01N2291/0234 ,  G01N2291/02827 ,  G01N2291/0421 ,  G01N2291/048 ,  G01N2291/057 ,  G01N2291/102 ,  G01N2291/2694

Abstract: The disclosure discloses a stress gradient high-efficiency non-destructive detection system based on frequency domain calculation of broadband swept frequency signals, and a detection method thereof. The detection method includes: step 1: calibrating an LCR wave velocity of an object to be measured; step 2: calculating a starting frequency and a cut-off frequency of broadband swept frequency signals based on the LCR wave velocity of the object to be measured in the step 1 and a stress gradient measuring range in a depth direction of the object to be measured; step 3: converting phase delay to time delay information based on the phase delay of the starting frequency and the cut-off frequency in the step 2; and step 4: determining stresses of depths corresponding to different frequency components based on the time delay information in the step 3 to finally realize layer-by-layer scanning of stresses at different depths of the measured object. The disclosure is used to solve the problem of low stress gradient measuring accuracy, and realize the high-efficiency characterization of the stress gradient in the depth direction.

公开(公告)号：US11986968B2

公开(公告)日：2024-05-21

申请号：US17694836

申请日：2022-03-15

Applicant: Harbin Institute of Technology

Inventor： Jihong Yan ,  Yuemin Chen ,  Pengxiang Wang

IPC: B25J9/00 ,  B25J9/16 ,  G06T19/00

CPC classification number: B25J9/1697 ,  B25J9/1612 ,  B25J9/1664 ,  B25J9/1671 ,  G06T19/006

Abstract: A real-time control system for industrial robots based on virtual reality (VR), including: a VR headset, a VR controller, a model construction module, a motion control module, a data communication system and a robot controller. Through the VR controller, a user can touch and drag an end of the gripper to move the robot in the Cyber environment. When the gripper moves into a bounding box of a control point, the data communication system is triggered, and a communication code corresponding to the control point is sent to the robot controller via a Unity engine script. After receiving the code, the robot controller sends the corresponding motion command such that the robot such that the robot moves in real time according to the control data.

公开(公告)号：US11913863B2

公开(公告)日：2024-02-27

申请号：US17384811

申请日：2021-07-26

Applicant: HARBIN INSTITUTE OF TECHNOLOGY, WEIHAI

Inventor： Jie Jiang ,  Xiangnan Zhang ,  Na Li ,  Hengnan Zhang ,  Jing Gao

IPC: G01N1/44 ,  G01N27/62 ,  G01N33/44 ,  G01N27/626 ,  G01N27/623

CPC classification number: G01N1/44 ,  G01N27/623 ,  G01N27/626 ,  G01N33/442

Abstract: The present invention relates to a microplastic detection device and method based on a pyrolysis-mass spectrometry technology. The microplastic detection device based on a pyrolysis-mass spectrometry technology provided by the present invention is substantially a sealed gas path device system formed connected via pipelines. The device includes a working gas source, a pyrolysis device, a filter and a mass spectrometer which are connected in sequence. After a microplastic sample is placed into the pyrolysis device, the microplastic sample is decomposed in the pyrolysis device, and pyrolysis products from the microplastic sample driven by a carrier gas of the working gas source enter the mass spectrometer for detection and analysis after being filtered by the filter. Furthermore, the present invention provides a microplastic detection method based on a pyrolysis-mass spectrometry. The present invention is widely applied to the field of a microplastic detection technology.

公开(公告)号：US11874672B2

公开(公告)日：2024-01-16

申请号：US17845313

申请日：2022-06-21

Applicant: Harbin Institute of Technology

Inventor： Yuliang Bai ,  Xiaogang Wang ,  Zichen Zhang ,  Shuai Wang ,  Yongzhi Shan ,  Tianfu Xu ,  Xiaoshuai Zhang ,  Jianming Guo ,  Yaxu Quan ,  Ligang Dong

IPC: G05D1/08

CPC classification number: G05D1/0875

Abstract: The present disclosure provides a design method for an active disturbance rejection roll controller of a vehicle under disturbance of complex sea conditions, including: step 1: establishing a vehicle roll attitude control model; step 2: designing an active disturbance rejection controller (ADRC) on the basis of the control model in step 1 and a pole placement method; and step 3: performing an active disturbance rejection roll control by using the active disturbance rejection controller in step 2. The present disclosure solves the problem of a stable control of the vehicle under the disturbance of the complex sea conditions.

公开(公告)号：US20240002988A1

公开(公告)日：2024-01-04

申请号：US18048523

申请日：2022-10-21

Applicant: Harbin Institute of Technology

Inventor： Kehuan WANG ,  Gang LIU

IPC: C22F1/18

CPC classification number: C22F1/183

Abstract: An in-situ strengthening and rapid forming method for thin-walled titanium alloy tubular components. The method includes the following steps: the tube blank is placed in a forming die which is at a room temperature, and after the two ends of the tube blank are sealed, the tube blank is heated within 1 min. The heating for the tube blank is stopped after the temperature of the tube blank reaches a predetermined temperature, and a high-pressure gas is immediately introduced into the tube blank. So, the tube blank is bulged rapidly to the inner wall of the forming die. After the pressure in the tube blank reaches a predetermined pressure, the predetermined pressure is maintained for 3-10 s and the tube blank is cooled in the forming die. Then, the high-pressure gas is discharged to obtain the thin-walled titanium alloy tubular component.

公开(公告)号：US11854307B2

公开(公告)日：2023-12-26

申请号：US17516725

申请日：2021-11-02

Applicant: Harbin Institute of Technology, Weihai

Inventor： Xin Hu ,  Deqiong Ding ,  Zhengzuo Li ,  Zhiyuan Zhou ,  Dianhui Chu

IPC: G06V40/20 ,  G06T7/277

CPC classification number: G06V40/25 ,  G06T7/277 ,  G06T2207/10028 ,  G06V2201/07

Abstract: In the multi-target detection and tracking method, lidar (2D laser scanner) scans point cloud data of surroundings and transfers the collected data to the edge server. Then, the edge server uploads the data to the cloud. After obtaining the lidar data, point clouds of footsteps are extracted through dynamic point extraction, point clustering, and random forest model, respectively. Footsteps are matched to form human tracking trajectory by using trajectory matching. After the tracking process, the walking information is published to the users, in a visual form. Meanwhile, the gait parameters are saved into files, including walking speed and step length, when human is detected. Comparing to the visual sensor based human tracking methods, the present invention employs lidar to avoid the interference of ambient light, which leads to easier implementation and larger universality, especially for multi-target scenarios.

公开(公告)号：US20230384090A1

公开(公告)日：2023-11-30

申请号：US17982033

申请日：2022-11-07

Applicant: Harbin Institute of Technology

Inventor： Pengcheng Hu ,  Liang Yu

IPC: G01C9/06 ,  G01C9/08

CPC classification number: G01C9/06 ,  G01C9/08 ,  G01C2009/066

Abstract: A high-precision dual-axis laser inclinometer based on wavefront homodyne interference and a measuring method are disclosed. The method includes: obtaining a laser signal through a laser light source module, transmitting the laser signal to an integrated sensing module, and generating a wavefront interference signal based on the integrated sensing module; and inputting the wavefront interference signal into a signal processing module for performing high-precision decoupling operation to obtain a horizontal inclination angle measurement result. The measurement resolution is high, the measurement result can be directly traced to the laser wavelength, high-precision dual-axis inclination angle measurement can be realized only by using single-beam measurement light, meanwhile, the laser inclinometer has the advantages of being simple in structure, simple in light path, easy to integrate, beneficial to engineering implementation, and high in cost performance, and the requirement of high-end equipment on the ultra-precision inclinometer is met.