公开(公告)号：US20230342522A1

公开(公告)日：2023-10-26

申请号：US17799474

申请日：2022-05-05

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xueguan SONG ,  Xiwang HE ,  Kunpeng LI ,  Xiaonan LAI ,  Liangliang YANG ,  Yitang WANG ,  Wei SUN

IPC: G06F30/23

CPC classification number: G06F30/23

Abstract: The present invention belongs to the field of the digital twin, and relates to a digital twin framework of weld joint fatigue based on a structural stress method. The framework is divided into an off-line stage and an on-line stage, wherein the off-line stage comprises establishing a finite element model, calculating equivalent structural stress, and training an artificial intelligence algorithm; and the on-line stage comprises reading sensor data, predicted by the artificial intelligence algorithm, counting by a rainflow counting method and calculating remaining life by cumulative damage. The framework combines five methods, i.e. a finite element method, a structural stress method, the artificial intelligence algorithm, an upper envelope method, the rainflow counting method, and a Miner linear cumulative damage method. The present invention realizes visual feedback and early warning of a dangerous position of a weld joint through real-time prediction of mechanical properties and fatigue damage of the weld joint.

公开(公告)号：US20230115586A1

公开(公告)日：2023-04-13

申请号：US17633069

申请日：2021-10-08

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xueguan SONG ,  Xiaonan LAI ,  Yanan ZOU ,  Xin WANG ,  Xiwang HE ,  Tianci ZHANG ,  Tao FU ,  Wei SUN

IPC: G05D1/00 ,  G06F30/23

Abstract: A construction method of digital twin for structure performance of an intelligent excavator. Through the finite element analysis on key parts in the process of the intelligent excavator, the relevant structural mechanics performance is obtained; The important operating states of the key parts of the intelligent excavator in the excavation process are collected, and the key operating data are obtained through data processing and calculation; sensor data and an artificial intelligence algorithm are fused, and the structure performance of the parts of the intelligent excavator under multiple unknown working conditions is predicated by using a prediction model; and finally, the performance data information is modeled and rendered by computer graphics technology, to obtain a digital twin of the structure performance display of the intelligent excavator is obtained, thereby realizing digital twin mapping of the performance information on key parts of the intelligent excavator in the excavation process.

公开(公告)号：US20210257278A1

公开(公告)日：2021-08-19

申请号：US17252649

申请日：2020-08-03

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xueguan SONG ,  Kunpeng LI ,  Changan ZHOU ,  Chaoyong ZONG ,  Qingye LI ,  Wei SUN

IPC: H01L23/473 ,  G01J5/00 ,  G01L19/00 ,  H02K11/25 ,  H02K44/04

Abstract: A magnetofluid pump device for IGBT heat dissipation and a test method therefor are provided. The magnetofluid pump device uses a liquid metal as a coolant, which can absorb more heat than an ordinary water-cooling device and better dissipate heat for IGBT chips. Temperature and pressure changes in an inlet pipe and an outlet pipe of a magnetofluid pump can be monitored in real time through temperature sensors and pressure sensors, and temperature changes of the IGBT chips can be observed in real time through a thermal imager. The test method for the magnetofluid pump device for IGBT heat dissipation proposed by the present invention is simple and easy to implement. A magnetic fluid can be driven to flow by energizing positive and negative electrodes in the magnetofluid pump under the action of magnetic fields, and water-cooling equipment can dissipate heat for the magnetic fluid in the magnetofluid pump.

公开(公告)号：US20200278240A1

公开(公告)日：2020-09-03

申请号：US16606991

申请日：2018-02-07

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Qingchao SUN ,  Bo YUAN ,  Wei SUN ,  Jiecheng DING

IPC: G01H11/08 ,  G01L5/24

Abstract: The present invention discloses a piezoelectric patch-based real-time and high-precision bolt preload detection method and system. A piezoelectric patch is used as an ultrasonic excitation source and pasted on the head of a bolt, and the high-precision fitting relationship between the ultrasonic change of time-of-flight and the bolt preload is established according to the law of the ultrasonic change of time-of-flight of single echo with the stress so that the real-time detection of the bolt preload is realized by using the mathematical relationship. Compared with the previous method using ultrasonic probes, the present invention eliminates the error caused by the uncertainty of couplant thickness and further improves the measurement precision by using the change of time-of-flight of single echo. Meanwhile, the low-error rate measurement of the bolt preload is realized at a low cost and without affecting the structural performance.

公开(公告)号：US20200038961A1

公开(公告)日：2020-02-06

申请号：US16341398

申请日：2017-10-11

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Chunzheng DUAN ,  Yumin LIU ,  Wei SUN ,  Yuwen SUN ,  Fangyuan ZHANG ,  Kang JU

IPC: B23B27/08

Abstract: A tool quick-stop device for a lathe has a base, bottom plate, front side plate, rear side plate, right side plate, left side plate, top fixed plate, tool bar, cam lever, buffer spring, cylindrical guide rail, adjusting nut, first locking nut, double end stud, second locking nut, pressure spring, pressing plate, hold-down bolt and pin shaft. The cam lever supports the tool bar before tool falling. When tool falling is required, the cam lever is rotated through external force. When the cam lever rotates over a certain position, the tool bar instantaneously loses supporting force. Under strong pressure of the pressure spring, the tool bar falls the tool with great acceleration and is separated from the cutting region in a short period of time and the cutting root is frozen.