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公开(公告)号：US10648334B2
公开(公告)日：2020-05-12
申请号：US16076822
申请日：2017-01-18
Applicant: Dalian University of Technology
Inventor： Zhengzheng Wang , Yang Gao
Abstract: A laser-assisted tunnel boring machine and a rock fragmenting method thereof belong to the technical field of tunnel engineering. Two rock fragmenting modes exist: a laser-cutter rock fragmenting mode and a cutter rock fragmenting mode, wherein the two rock fragmenting modes are switched by an intelligent control system; and for the laser-assisted rock fragmenting mode, hot fragmenting is mainly performed using lasers which assisted by water spray systems, to achieve the purposes of auxiliary rock fragmenting by laser radiation for hot cracking and water spray for quick cooling, and mechanical rock fragmenting for excavation.
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公开(公告)号：US20200096452A1
公开(公告)日：2020-03-26
申请号：US16195134
申请日：2018-11-19
Applicant: Dalian University of Technology
Inventor： Yongchen SONG , Jiafei ZHAO , Zheyuan LIU , Weiguo LIU , Yu LIU , Huiyong LIANG , Jiawei CHU , Mingjun YANG , Yanghui LI
Abstract: The present invention discloses a fully visual flow loop system for studying hydrate blockage. The fully visual flow loop system includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline connected successively in an end-to-end way; a single screw pump is connected between the first pipeline and the fourth pipeline from the four pipelines; the first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all transparent to light; a plurality of CCD cameras are arranged between the first pipeline, the second pipeline, the third pipeline and the fourth pipeline; and, the fully visual flow loop system is arranged in a stepping low-temperature thermostatic chamber; a solution injection system can inject a solution into the fully visual flow loop system; a separation and collection system can separate and recover the solution; and a data acquisition system can integrate sensor information in all the other systems and give real-time feedback to ensure reasonable and coordinated operation of all systems. The fully visual flow loop system for studying hydrate blockage in the present invention can realize full visualization and real-time monitoring of the flow loop system.
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173.发明申请公开(公告)号：US20200081033A1
公开(公告)日：2020-03-12
申请号：US16339907
申请日：2017-11-15
Applicant: Dalian University of Technology
Inventor： Zhenyu ZHANG , Junfeng CUI , Bo WANG , Dongming GUO
Abstract: The present invention provides a method for moving and transferring nanowires using tapered hair of diameter in micron range. The nanowires have a diameter of 60-150 nm. The tapered hair has a diameter of 1-100 μm, a tip curvature radius of 0.8-3 μm and a length of 4-10 mm. A plastic film on a copper grid used for a TEM is removed, the copper grid is reserved, and holes have a diameter of 50-100 μm. The copper grid after ultrasonic cleaning gains the nanowires from the acetone liquid with ultrasonic dispersed nanowires. The copper grid with distributed nanowires and the tapered hair are respectively placed on mobile platforms of two different optical microscopes. Millimeter movement and micron movement of the tapered hair are realized, thereby realizing movement and transfer operation for the nanowires. The tip of the tapered hair is dipped in a small drop of conductive silver epoxy, and the conductive silver epoxy is respectively dropped on both ends of the nanowires; and the radius of the dropped conductive silver epoxy is 4-8 μm. The present invention realizes a method for moving and transferring nanowires using tapered hair through the mobile platforms of the two optical microscopes.
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公开(公告)号：US20200080921A1
公开(公告)日：2020-03-12
申请号：US16340356
申请日：2017-11-15
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhenyu ZHANG , Junfeng CUI , Yuefeng DU , Dongming GUO
Abstract: A self-healing method for fractured SiC single crystal nanowires. A hair in a Chinese brush pen of yellow weasel's hair moves and transfers nanowires, which are placed on an in-situ TEM mechanical microtest apparatus. An in-situ nanomechanical tension test is realized. The nanowires are loaded. Displacement is 0-200 nm. Fracture strength of the single crystal nanowires is 12-15 GPa. After the nanowires are fractured, unloading causes slight contact between the fractured end surfaces, electron beam is shut off, and self-healing of the nanowires is conducted in a vacuum chamber. Partial recrystallization is found at a fracture after self-healing through in-situ TEM representation. A fracture strength test is conducted again after self-healing. A fractured position after healing is the same as the position before healing. The fracture strength of the single crystal nanowires after self-healing is 1-2.5 GPa. The recovery ratio of the fracture strength is 10-20%.
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公开(公告)号：US20200074221A1
公开(公告)日：2020-03-05
申请号：US16342948
申请日：2018-03-28
Applicant: Dalian University of Technology
Inventor： Tinghua YI , Xiaomei YANG , Chunxu QU , Hongnan LI
Abstract: Structural health monitoring relating to an automatic method for estimating structural modal parameters by clustering. The structural modal parameters from state-space models are calculated in different orders by Natural Excitation Technique in combination with Eigensystem Realization Algorithm According to the characteristics that physical modes are those with high similarity and stably appearing at different orders while spurious modes are those with little similarity and unstably appearing at different orders, the modal dissimilarity between two nearest modes in consecutive order are considered as feature of the mode in the lower order. Then, features of modes are used in fuzzy C-means clustering to adaptively acquire the stable cluster where modes are with high similarity. Finally, Hierarchical clustering is used to group the stable modes with identical modal parameters together and thus each physical mode can be obtained.
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Patent Agency Ranking
176.发明申请公开(公告)号：US20200064126A1
公开(公告)日：2020-02-27
申请号：US16462238
申请日：2018-01-23
Applicant: Dalian University of Technology
Inventor： Yongqing WANG , Kuo LIU , Jiakun WU , Haibo LIU , Zhisong LIU , Haining LIU
IPC: G01B11/27
Abstract: A method for the rapid detection of the linear axis angular error of an NC machine tool, belongs to the technical field of NC machine tool testing. Firstly, the measuring device is mounted on the linear axis. Then, the linear axis moves at three different speeds at a constant speed, and the upper measurement system automatically performs multi-channel acquisition and storage of the motion measurement's point measurement data. Then, based on the same geometric error signal, it is decomposed into the different frequency components, and the measurement angle error is filtered at the different speeds. Finally, the measurement angle errors at the three speeds after filtering are superimposed to complete the rapid measurement of the linear axis angular error of the machine tool. The measurement efficiency is high and data processing capability is strong.
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177.发明申请公开(公告)号：US20200064125A1
公开(公告)日：2020-02-27
申请号：US16462234
申请日：2018-01-23
Applicant: Dalian University of Technology
Inventor： Yongqing WANG , Haibo LIU , Jiakun WU , Kuo LIU , Kang KUANG , Dawei LI
IPC: G01B11/27
Abstract: A rapid detection method for the geometric accuracy of the linear motion axis of an NC machine tool, uses accelerometers to measure the acceleration perpendicular to the direction of motion when the linear motion axis moves at a uniform speed. Firstly, the measuring device is mounted on the linear motion axis, and the upper measurement system automatically performs multi-channel acquisition and storage of the motion point acceleration data. Then, filter the acceleration data at the different speeds. Finally, the displacement data is obtained by quadratic integration of the filtered acceleration data in the time domain. Then calculate the straightness of the linear motion axis using the End Point Fit method, and complete the rapid measurement of the straightness of the linear motion axis of the machine tool. This can realize the rapid measurement of the geometric accuracy of the linear motion axis of the machine tool.
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178.发明申请公开(公告)号：US20200063665A1
公开(公告)日：2020-02-27
申请号：US16462504
申请日：2018-01-25
Applicant: Dalian University of Technology
Inventor： Yanhua MA , Xian DU , Ximing SUN
Abstract: An aero-engine full flight envelope model adaptive modification method based on a deep learning algorithm. A dynamic parallel compensator based on a recursive neural network is adopted to compensate the error of the original nonlinear model within the full flight envelope under the condition without aero-engine performance deterioration. A modifier based on a genetic algorithm is also adopted to conduct adaptive adjustment on correction coefficients of health parameters to be modified in the original nonlinear component-level model. The health parameters to be modified are determined by a multi-attribute decision algorithm based on integrated evaluation. The sum of the modified nonlinear component-level model output and the compensator output is consistent with the aero-engine operation test output data. This provides powerful support for the design of aero-engine control systems and fault diagnosis systems.
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公开(公告)号：US20200063542A1
公开(公告)日：2020-02-27
申请号：US16344331
申请日：2018-06-13
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Yongchen SONG , Bingbing CHEN , Mingjun YANG , Pengfei WANG , Huiru SUN
Abstract: The present invention provides a method of water flow erosion for marine gas hydrate exploitation. Based on the characteristics of higher permeability around gas hydrate exploitation well, controlling the seawater flow process by the pressure difference between hydrate reservoir and gas hydrate exploitation well. And the chemical potential difference between hydrate phase and water phase is the main driving factor for promoting the hydrate decomposition. Meanwhile, the salinity will increase and then the phase equilibrium temperature of hydrate will increase during seawater flow process. The water flow erosion accelerates the heat and mass transfer in hydrate reservoir to promote the efficient and complete decomposition and collection of hydrate. And the method of water flow erosion can decrease the risk of the geographical destruction caused by the large pressure drop. The present invention also provides the combination modes of water flow erosion with depressurization, thermal injection and other methods.
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180.发明申请公开(公告)号：US20200061769A1
公开(公告)日：2020-02-27
申请号：US16338971
申请日：2017-11-07
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Wei LIU , Zhenyuan JIA , Xiao LI , Yi PAN , Xin MA , Jianwei MA
IPC: B23Q17/24
Abstract: A monocular vision six-dimensional measurement method for high-dynamic large-range arbitrary contouring error of a CNC machine tool of the present invention belongs to the field of dynamic error detection of machine tools, and relates to a six-dimensional measurement method for high-dynamic large-range arbitrary contouring error of a CNC machine tool using a monocular vision measurement technology with short-time stroboscopic illumination and a priori standard plate. The method designs a measurement fixture and a measurement system, and uses a monocular vision pose algorithm to improve both the visual measurable dimension and range of interpolated contour in combination with priori knowledge. In light of the principle of error distribution, a small field of view is used to enhance the measurement accuracy of the coded primitives in the images. Then, by traversing all the acquired images using the proposed method, we can obtain the six-dimensional motion contour; and the six-dimensional contouring error caused by the imperfect machine interpolation can be computed by comparing the measured contour with the nominal one. The method enhances the measurable dimension of the vision technology through the monocular vision pose algorithm in combination with a datum transformation method, and realizes the six-dimensional measurement of large-range arbitrary contouring error of the CNC machine tool under the small field of view.
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