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1.发明公开公开(公告)号：US20230358630A1
公开(公告)日：2023-11-09
申请号：US18134058
申请日：2023-04-13
发明人： Maosen CAO , Tongfa DENG , Ruke TAN , Chunhui XIE , Yufeng ZHANG , Zha NI , Zeyu WANG
IPC分类号： G01M5/00
CPC分类号： G01M5/0033
摘要： A boundary adaptive structural fatigue damage detection method driven by time-domain information entropy comprises a sensor sequence composed of several sensors arranged on the structure, which is used to apply excitation to the structure, collect the displacement time-history response curves at different positions on the structure, and establish a database of time-history data. According to the data set in the database, the information entropy of the time-history response at different positions on the acquisition structure is obtained based on the information entropy to measure the disorder degree of the time-domain response signal. According to the location of several sensors, the information entropy values of the time-history response are connected in turn to obtain the time-history information entropy curve of the whole structure. Analyze of time-history information entropy curve, and the information entropy curve will show jump phenomena to determine the location of the crack.
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公开(公告)号：US11802808B2
公开(公告)日：2023-10-31
申请号：US17763218
申请日：2020-06-24
发明人： Duo Liu , Jiandong Zhang , Hui Xiong , Xiaonan Feng , Xianqiang Wang , Jun Lu
IPC分类号： G01M5/00
CPC分类号： G01M5/005 , G01M5/0008
摘要： The present disclosure provides an automatic test system for actual stress of a bridge based on DIC technology, where the system includes a camera, a phosphor spraying device, a computer, and a sliding rail; the sliding rail is arranged on both sides of an upper wing of a box-shaped concrete beam; the phosphor spraying device is used to spray phosphor on a web of the box-shaped concrete beam to form speckles of varying light and shade; the camera is slidably connected to the sliding rail through a bracket, and is used to photograph the speckles and transmit a speckle image to the computer; and the computer is used to analyze and process the speckle image taken by the camera and generate a time history diagram of stress.
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公开(公告)号：US20240233371A1
公开(公告)日：2024-07-11
申请号：US18540915
申请日：2023-12-15
发明人： Maosen CAO , Ronghua FU , Tongfa DENG , Yufeng ZHANG , Xiangdong QIAN , Dragoslav Sumarac , Shuai LI , Kai ZHU
IPC分类号： G06V20/10 , G06N3/0464
CPC分类号： G06V20/182 , G06N3/0464
摘要： A depth-stage dependent and hyperparameter-adaptive lightweight CNN-based model, named Faster R-Stair, which relates to the field of concrete crack detection technology. The structure of the backbone in this model is depth-stage dependent, which includes suitable structures in different depths. The backbone is also hyperparameter-adaptive. The basic components in different depths of the backbone have variations according to the adjustment of some hyperparameters. The proposed model in this embodiment has the advantages of high convergence speed in training, fast detection speed and high accuracy when used in crack detection.
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公开(公告)号：US20230334198A1
公开(公告)日：2023-10-19
申请号：US18135218
申请日：2023-04-17
申请人： Jiangxi University of Science and Technology , Hohai University , China Three Gorges Construction (Group) Co., Ltd. , JSTI Group
发明人： Maosen CAO , Yazhou JIANG , Tongfa DENG , Yifei LI , Yufeng ZHANG , Lei SHEN , Li CUI , Zeyu WANG , Jiayi PENG
摘要： A structural dynamic parameter identification method aided by a rPCK surrogate model comprises the following steps. Establish a finite element model that roughly reflects the structural system to be analyzed. Establish the dynamic parameter space sample set. The structural system response space sample set driven by the dynamic parameter space sample set is established by using the probabilistic finite element analysis. The robust polynomial Chaos Kriging surrogate model is obtained by mapping the dynamic parameter space sample set to the structural system response space sample set. The measured structural system response is used to drive the rPCK surrogate model, and then Bayesian inference is used to identify the structural dynamic parameters. The mean value of Bayesian posterior estimation is used as the estimated value of structural dynamic parameters. The proposed method creates conditions for establishing a high-fidelity finite element model of the actual engineering structural system.
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5.发明公开公开(公告)号：US20240029402A1
公开(公告)日：2024-01-25
申请号：US18203080
申请日：2023-05-30
申请人： Hohai University , JSTI GROUP , Jiangsu Dongjiao Intelligent Control Technology Group Co., Ltd.
发明人： Maosen CAO , Ronghua FU , Yufeng ZHANG , Jie WANG , Dragoslav SUMARAC , Xiangdong QIAN , Li CUI , Kai ZHU
IPC分类号： G06V10/764 , G06V20/00
CPC分类号： G06V10/764 , G06V20/00
摘要： An intelligent method for efficiently classifying concrete cracks from large amounts of image data is proposed, named inverted residual (IR) 7-Efficient Channel Attention and Convolutional Block Attention Module (EC) network. The IR7-EC network consists of a convolutional layer, seven inverted residual-ECA structures, a CBAM attention mechanism, a pooling layer, and multiple fully connected layers that are sequentially connected. The inverted residual-ECA structure consists of two components: a depthwise separable convolution-based inverted residual structure and an ECA attention mechanism. The new inverted residual structure facilitates the feature extraction of concrete cracks. Compared to conventional network structures like VGG and Resnet, the proposed IR7-EC network excels in both accuracy and efficiency. Once the IR7-EC network is fully trained, it can accurately classify various types of concrete cracks in captured images. This method offers several advantages, including a small number of network parameters, fast training convergence speed, and precise classification results.
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6.发明公开公开(公告)号：US20230358631A1
公开(公告)日：2023-11-09
申请号：US18144868
申请日：2023-05-09
发明人： Maosen CAO , Dayang LI , Tongfa DENG , Dragoslav SUMARAC , Ganggang SHA , Yufeng ZHANG , Emil MANOACH , Zeyu WANG
IPC分类号： G01M7/02
CPC分类号： G01M7/02
摘要： A damage identification method for a cantilever beam based on a multifractal spectrum of a multi-scale reconstructed attractor includes: acquiring an original acceleration signal of the cantilever beam by a dynamic measurement system, performing stationary wavelet decomposition on a pretreated acceleration signal to obtain multi-scale sub-signals, selecting the multi-scale sub-signal that can represent main vibration characteristics of the cantilever beam for phase space reconstruction and normalization to obtain a normalized multi-scale reconstructed attractor, constructing the multifractal spectrum of the multi-scale reconstructed attractor, establishing a damage index based on a singularity index of the multifractal spectrum, and identifying and locating damage of the cantilever beam according to a relative numerical value of the damage index. The method can quantify structural damage characteristics in multi-scale phase space domain from the perspective of multifractal, and provide the simple, rapid and accurate damage identification method for cantilever beam.
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公开(公告)号：US20220357235A1
公开(公告)日：2022-11-10
申请号：US17763218
申请日：2020-06-24
发明人： Duo LIU , Jiandong ZHANG , Hui XIONG , Xiaonan FENG , Xianqiang WANG , Jun LU
IPC分类号： G01M5/00
摘要： The present disclosure provides an automatic test system for actual stress of a bridge based on DIC technology, where the system includes a camera, a phosphor spraying device, a computer, and a sliding rail; the sliding rail is arranged on both sides of an upper wing of a box-shaped concrete beam; the phosphor spraying device is used to spray phosphor on a web of the box-shaped concrete beam to form speckles of varying light and shade; the camera is slidably connected to the sliding rail through a bracket, and is used to photograph the speckles and transmit a speckle image to the computer; and the computer is used to analyze and process the speckle image taken by the camera and generate a time history diagram of stress.
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