公开(公告)号：US20240110345A1

公开(公告)日：2024-04-04

申请号：US17768648

申请日：2021-01-04

Applicant: SHANDONG JIAOTONG UNIVERSITY

Inventor： Jin LI ,  Guangbo LIU ,  Fengkun CUI ,  Xu DONG ,  Xinzhuang CUI

IPC: E01D19/02 ,  E01D21/00

CPC classification number: E01D19/02 ,  E01D21/00

Abstract: A corrugated pipe connection device for a continuous section at the top of a continuous T-shaped beam bridge pier. The connection device includes a combined steel pipe telescopic device and a corrugated pipe connector, the interiors being hollow; the connector includes a first clamping member for clamping a wall surface of a corrugated pipe; one end of the telescopic device is a second clamping member with the same structure as the first; the other end is a telescopic steel pipe which is telescopic in the length direction; and the telescopic steel pipe is connected to the connector. The device replaces a corrugated pipe between two T-shaped beams, thereby avoiding problems such as breakage and slurry leakage caused by an original construction mode. The device can stretch out and draw back according to a distance between the T-shaped beams, and steel strands can be stranded by means of a stranding machine.

公开(公告)号：US20250128406A1

公开(公告)日：2025-04-24

申请号：US18575234

申请日：2023-10-24

Applicant: SHANDONG JIAOTONG UNIVERSITY

Inventor： Jiuhong RUAN ,  Xingyu GUO ,  Fuguang YANG ,  Haiyan WANG ,  Guodong LI ,  Jiao GAO

IPC: B25J9/10

Abstract: A gripper mechanism is provided, which relates to the technical field of grippers. The gripper mechanism includes a motor, a cylinder barrel, a piston and a guide assembly. The piston reciprocates in the cylinder barrel under the action of the motor and the guide assembly. The piston includes a piston body and a piston rod located in the piston body. Both ends of the cylinder barrel are respectively provided with cylinder heads for limiting the maximum distance and the minimum distance between the piston body and a part to be gripped. The piston rod includes a driving shaft, a cross slider coupling and a gripping head which are connected in turn. The power output by the motor is transmitted to the gripping head through the driving shaft and the cross slider coupling in turn.

公开(公告)号：US12266942B1

公开(公告)日：2025-04-01

申请号：US18947049

申请日：2024-11-14

Applicant: SHANDONG UNIVERSITY ,  SHANDONG JIAOTONG UNIVERSITY ,  SHANDONG BEIXINGQUAN ENERGY CO., LTD. ,  IMPERIAL COLLEGE LONDON

Inventor： Kejun Li ,  Zhijie Liu ,  Yuanzong Song ,  Zhenshan Huang ,  Yuchuan Li ,  Gang Shen ,  Yuanyuan Sun ,  Kaiqi Sun ,  Jie Lou ,  Liang Zhang ,  Kehan Zhang

IPC: H02J3/38 ,  H02P21/22 ,  H02S40/32 ,  H02S50/10

Abstract: A fast-response photovoltaic (PV) simulator based on an improved deadbeat predictive current control (DPCC). Compared to actual PV modules, there is a response time at the output of the PV simulation. Currently widely used PV simulation have a long response time, which cannot meet the performance testing requirements of high-performance grid-connected PV inverters. Based on the energy balance of the inductor during the absorption and dissipation phases, the current control law of the output inductor in the PV simulation was studied in a single switching period, thereby establishing the required DPCC model. An integral compensation eliminates the steady-state error in current tracking caused by nonlinear factors such as time delay and mismatched parameters, enabling its wide application in engineering. For the proposed PV simulator, the transient response time can be reduced to 1.1 ms and significantly shorter than widely used PV simulation.

公开(公告)号：US20240158994A1

公开(公告)日：2024-05-16

申请号：US18284418

申请日：2022-10-31

Applicant: SHANDONG JIAOTONG UNIVERSITY ,  SHANDONG UNIVERSITY ,  CHONGQING UNIVERSITY ,  JINAN JINYUE HIGHWAY ENGINEERING CO., LTD.

Inventor： Xinzhuang CUI ,  Jin LI ,  Qing JIN ,  Shen ZUO ,  Dalu XIONG ,  Peng JIANG ,  Xiaoning ZHANG ,  Yefeng DU ,  Kai YUAN ,  Chongsheng XIN

IPC: E01C3/04 ,  C08F220/28 ,  C08K3/22 ,  C08K3/34 ,  E01C3/00 ,  E01C19/00

CPC classification number: E01C3/04 ,  C08F220/281 ,  C08K3/22 ,  C08K3/346 ,  E01C3/003 ,  E01C19/00 ,  C08K2201/014

Abstract: An adjustment method of moisture content and dense state for a hydrogel improved subgrade based on weather-resistance during an in-service period, including: step 1: carrying out surface cleaning and compaction of ground; step 2: preparing hydrogel improved subgrade raw material; step 3: paving the prepared material on the surface to form first-layer improved subgrade; and step 4: paving plain soil subgrade onto the first-layer. The method combines the water absorption and release function of the modified resin and the characteristic of the gel state thereof, to pave the improved subgrade in layers, which can absorb water and slightly expand when the water content in the subgrade is increased to a certain threshold value, and a strength and compactness protective layer can also be formed at the connection sections of the ground and the subgrade, and the subgrade and the pavement, to prevent the pot-cover effect from occurring.

公开(公告)号：US20210322989A1

公开(公告)日：2021-10-21

申请号：US17273395

申请日：2019-01-29

Applicant: Shandong Jiaotong University

Inventor： Peng ZHANG ,  Jinxiang FENG ,  Jiuhong RUAN ,  Zhiguang GUAN ,  Jiwei ZHANG ,  Fuguang YANG ,  Xingyu GUO ,  Qian JIA ,  Qingzhen WU ,  Huijun WANG ,  Ying HAN

IPC: B01L7/02

Abstract: A constant temperature circular accelerated loading test system includes: a chassis; a motor reducer and a circular loading wheel group in the middle of the chassis, wherein the motor reducer provides power for the circular loading wheel group, and the circular loading wheel group implements a rolling test on a ground during rotation; a thermally insulated assembly on the chassis, the circular loading wheel group is located in a thermally insulated inner cavity of the thermally insulated assembly; a constant temperature unit on the chassis; a control cabinet on the chassis, wherein the control cabinet is connected to and controls the constant temperature unit and the motor reducer, respectively.