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1.发明公开公开(公告)号：US20230273103A1
公开(公告)日：2023-08-31
申请号：US18024200
申请日：2022-01-05
Applicant: Northeastern University
Inventor： Benguo HE , Xiating FENG , Rongli ZHEN , Xiwei ZHANG , Chengxiang YANG , Mian TIAN , Hongpu LI , Hongyuan FU
IPC: G01N3/04
CPC classification number: G01N3/04 , G01N2203/0256 , G01N2203/0447 , G01N2203/0067
Abstract: Provided is a clamp of elastic box of stiff true-triaxial testing system and a displacement monitoring method for cuboid specimens. The clamp includes six pressing plates and eight plate springs, which form an elastic pressure box. One surface of the elastic pressure box can be disassembled, which simplifies the steps of rock sample mounting, and saving the mounting time. The springs connected with the pressing plates ensures the stability of the clamp but cannot affect the stress state of other surfaces of the rock sample during the test of the rock sample, thereby ensuring test accuracy. The invention further provides a displacement monitoring method for the rock sample by using the elastic box clamp. Six displacement sensors are mounted on the elastic box clamp, and the displacement of the rock sample can be monitored in real time.
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2.发明公开公开(公告)号：US20240230495A1
公开(公告)日：2024-07-11
申请号：US17912926
申请日：2022-07-22
Applicant: Northeastern University
Inventor： Xiating FENG , Xiwei ZHANG , Lei SHI , Zhibin YAO
CPC classification number: G01N3/30 , G01N3/10 , G01N33/24 , G01N2203/001 , G01N2203/0019 , G01N2203/0026 , G01N2203/0044 , G01N2203/0048 , G01N2203/0053 , G01N2203/0067 , G01N2203/0256 , G01N2203/0298 , G01N2203/0605 , G01N2203/0611 , G01N2203/0635 , G01N2203/0641 , G01N2203/0658
Abstract: The invention relates to a large-scale three-dimensional physical simulation test system for the whole development process of deep engineering rock burst. A CO2 blast cracking device, a dynamic fiber grating and ultrasonic probes are pre-embedded in a physical model sample of similar materials. Acoustic emission probes are pre-mounted on the boundary of a sample. A tunnel excavated in the sample is provided with a three-way acceleration sensor and an industrial endoscope. A sample 3D printer and a drop hammer impact device are arranged outside the three-dimensional static stress loading device. A hydraulic oil source and a controller are arranged outside the three-dimensional static stress loading device and mounted on the ground. The controller is connected with a computer.
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3.发明申请公开(公告)号：US20210140861A1
公开(公告)日：2021-05-13
申请号：US16966379
申请日：2019-04-28
Applicant: Northeastern University
Inventor： Xiwei ZHANG , Xiating FENG , Donghui MA
IPC: G01N3/08
Abstract: A double-layer concentric loading frame structure suitable for a true triaxial testing machine includes an inner-layer frame, an outer-layer frame and a base. A square slot hole is formed in a middle part of the inner-layer frame. The inner-layer frame is mounted on the base through a support platform. Actuators are mounted at a top end and a bottom end of the inner-layer frame. The outer-layer frame sleeves the inner-layer frame concentrically. Four actuators are distributed on an outer periphery of the outer-layer frame. A support plate is mounted at the top end of the inner-layer frame, and two lifting driving cylinders are mounted on the support plate. Piston rods of the lifting driving cylinders extend below the support plate and are connected to an upper surface of the outer-layer frame. A guide post is mounted on the upper surface of the outer-layer frame and extends above the support plate.
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Patent Agency Ranking
4.发明申请公开(公告)号：US20190242228A1
公开(公告)日：2019-08-08
申请号：US16061799
申请日：2018-02-12
Applicant: Northeastern University
Inventor： Xiating FENG , Zhengwei LI , Xiwei ZHANG , Jun TIAN , Chengxiang YANG , Zhibin YAO , Qiang WANG , Yanhua GONG
Abstract: A large-scale three-dimensional physical model test system for a deep cavern group comprises a base, an anti-deformation prestressed loading frame assembly, a load applying assembly, a model sample preparation and transportation assembly and a multifunctional hydraulic loading system assembly. The anti-deformation prestressed loading frame assembly and the model sample preparation and transportation assembly are both arranged on the base. The load applying assembly is arranged on the anti-deformation prestressed loading frame assembly, and the load applying assembly is connected with the multifunctional hydraulic loading system assembly. A model sample is subjected to long-time load holding, dynamic disturbance and displacement control overload under multi-surface multi-point cooperative control through cooperation between the load applying assembly and the multifunctional hydraulic loading system assembly.
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公开(公告)号：US20250086333A1
公开(公告)日：2025-03-13
申请号：US18031457
申请日：2023-02-08
Applicant: Northeastern University
Inventor： Xiwei ZHANG , Xiating FENG , Chunyuan XUE , Lei SHI
Abstract: Provided is a three-dimensional loading structure of an ultra-large physical simulation facility for deep engineering disasters. The three-dimensional loading structure comprises a horizontal ultra-large reaction frame, a vertical ultra-large reaction frame, ultra-long stroke lifting and locking hydraulic cylinders, five array distributed hydraulic actuator groups and a linear distributed hydraulic actuator group, wherein the horizontal ultra-large reaction frame adopts a frame structure being formed by splicing eight segments of arch beams, circular in an outer part and square in an inner part, and wrapped with prestressed carbon fibers, and the vertical ultra-large reaction frame adopts a double-beam four-column preload frame structure; the five array distributed hydraulic actuator groups are distributed around the horizontal ultra-large reaction frame and at a top of the vertical ultra-large reaction frame, and the linear distributed hydraulic actuator group is located at a center of a bottom of the vertical ultra-large reaction frame.
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公开(公告)号：US20240319047A1
公开(公告)日：2024-09-26
申请号：US18028352
申请日：2023-02-08
Applicant: Northeastern University
Inventor： Xiating FENG , Xiwei ZHANG , Lei SHI
CPC classification number: G01M99/005 , E21F17/00
Abstract: Provided is an ultra-large physical simulation facility for deep engineering disasters, including a long-time large-load loading system for a geological model, a 3D printing system of a deep oil, gas and water multiphase multi-component complex geological body model, a high-temperature-chemical-multiphase fluid collaborative injection, monitoring and control system, a robot excavation and monitoring system for a complex engineering structure in a model under deep geological environment, an intelligent ventilation system for a deep metal mine complex drilling, mining and transferring network, an intelligent filling system for a deep metal mine ultra-large stope, a deep-well enhanced geothermal safe intelligent mining system, an all-spatial-temporal intelligent high-precision monitoring system for an excavation and fracture process of a large-scale geological model, and an ultra-large multi-task intelligent collaborative main control and digital twin system for physical simulation tests.
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7.发明申请公开(公告)号：US20210156773A1
公开(公告)日：2021-05-27
申请号：US16961900
申请日：2019-06-28
Applicant: Northeastern University
Inventor： Xiwei ZHANG
Abstract: The invention relates to a rapid rotation opening type high-pressure rock triaxial pressure chamber with a loading structure, a traditional loading frame is omitted, a pressure chamber shell is fixedly connected with an actuator cylinder barrel through high-strength bolts to form a counterforce body loading maximum principal stress, clearance is saved by 50%. An opening manner of up-and-down motion is abandoned, a pressure chamber sealing and spacing sleeve is sleeved outside the pressure chamber shell and can rotate, rock specimen access openings are formed on the pressure chamber shell and the pressure chamber sealing and spacing sleeve, and a dismountable plugging block is arranged in each rock specimen access opening in the pressure chamber shell, so that a rapid rotation opening manner is achieved. As such, a traditional process in which the high-strength bolts need to be disassembled and assembled is omitted.
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公开(公告)号：US20200040717A1
公开(公告)日：2020-02-06
申请号：US16317738
申请日：2018-05-16
Applicant: NORTHEASTERN UNIVERSITY
Inventor： Xiating FENG , Gaoming LU , Yuanhui LI , Xiwei ZHANG , Jianhua WEN , Tianyang TONG , Yanhua GONG
IPC: E21B43/26 , E21B43/285 , E21B36/04
Abstract: A high-power microwave borehole fracturing device for an engineering rock mass includes a high-power microwave generator, a high-power microwave coaxial heater, a high-power low-loss microwave coaxial transmission line, and a microwave power adaptive regulation and control system. The high-power microwave generator includes a continuous wave magnetron, a permanent magnet, a waveguide excitation chamber, a coaxial circulator, a coaxial matching load, a coaxial coupling converter, a waveguide coaxial converter, and an output waveguide. The high-power microwave coaxial heater includes a microwave transmission inner conductor, a microwave transmission outer conductor, a microwave input connector, a microwave short circuit cap, and a conductor supporting cylinder. The high-power low-loss microwave coaxial transmission line includes an input end coaxial line, middle section coaxial lines, and an output end coaxial line. The microwave power adaptive regulation and control system includes an impedance matching regulator, a microwave power controller, and a temperature sensor.
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