Mr. Seongwoon Jeong Profile

Seongwoon Jeong

Graduate student at Stanford Univ

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Publications (5)

Proceedings Article | 27 March 2019 Presentation + Paper

Sensor data reconstruction and anomaly detection using bidirectional recurrent neural network

Seongwoon Jeong, Max Ferguson, Kincho Law

Proceedings Volume 10970, 109700N (2019) https://doi.org/10.1117/12.2514436

KEYWORDS: Sensors, Data modeling, Neural networks, Reconstruction algorithms, Bridges, Detection and tracking algorithms, Sensor networks, Principal component analysis, Error analysis, Numerical simulations

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Proceedings Article | 27 March 2019 Paper

Reidentification of trucks in highway corridors using convolutional neural networks to link truck weights to bridge responses

Rui Hou, Seongwoon Jeong, Kincho Law, Jerome Lynch

Proceedings Volume 10970, 109700P (2019) https://doi.org/10.1117/12.2515617

KEYWORDS: Bridges, Sensors, Cameras, Structural health monitoring, Imaging systems, Network architectures, Feature extraction, Roads, Computer vision technology, Video

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The widespread availability of cost-effective sensing technologies is translating into an increasing number of highway bridges being instrumented with structural health monitoring (SHM) systems. Current bridge SHM systems are only capable of measuring bridge responses and lack the ability to directly measure the traffic loads inducing bridge responses. The output-only nature of the monitoring data available often leaves damage detection algorithms ill-posed and incapable of robust detection. Attempting to overcome this challenge, this study leverages state-of-the-art computer vision techniques to establish a means of reliably acquiring load data associated with the trucks inducing bridge responses. Using a cyberenabled highway corridor consisting of cameras, bridge monitoring systems, and weigh-in-motion (WIM) stations, computer vision methods are used to track trucks as they excite bridges and pass WIM stations where their weight parameters are acquired. Convolutional neural network (CNN) methods are used to develop automated vehicle detectors embedded in GPU-enabled cameras along highway corridors to identify and track trucks from real-time traffic video. Detected vehicles are used to trigger the bridge monitoring systems to ensure structural responses are captured when trucks pass. In the study, multiple one-stage object detection CNN architectures have been trained using a customized dataset to identify various types of vehicles captured at multiple locations along a highway corridor. YOLOv3 is selected for its competitive speed and precision in identifying trucks. A customized CNN-based embedding network is trained following a triplet architecture to convert each truck image into a feature vector and the Euclidean distance of two feature vectors is used as a measure of truck similarity for reidentification purposes. The performance of the CNN-based feature extract is proved to be more robust than a hand-crafted method. Reidentification of the same vehicle allows truck weights measured at the WIM station to be associated with measured bridge responses collected by bridge monitoring systems.

Proceedings Article | 12 April 2017 Paper

A distributed cloud-based cyberinfrastructure framework for integrated bridge monitoring

Seongwoon Jeong, Rui Hou, Jerome Lynch, Hoon Sohn, Kincho Law

Proceedings Volume 10168, 101682W (2017) https://doi.org/10.1117/12.2270716

KEYWORDS: Bridges, Data modeling, Clouds, Databases, Structural health monitoring, Sensors, Information fusion, System integration, Safety, Computing systems, Web services, Roads, Finite element methods, Sensor networks

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Proceedings Article | 20 April 2016 Paper

A cloud-based information repository for bridge monitoring applications

Seongwoon Jeong, Yilan Zhang, Rui Hou, Jerome Lynch, Hoon Sohn, Kincho Law

Proceedings Volume 9803, 980313 (2016) https://doi.org/10.1117/12.2219064

KEYWORDS: Bridges, Databases, Sensors, Clouds, Data modeling, Roads, Finite element methods, Standards development, Systems modeling, Data storage

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Proceedings Article | 3 April 2015 Paper

A data management infrastructure for bridge monitoring

Seongwoon Jeong, Jaewook Byun, Daeyoung Kim, Hoon Sohn, In Hwan Bae, Kincho Law

Proceedings Volume 9435, 94350P (2015) https://doi.org/10.1117/12.2177109

KEYWORDS: Sensors, Data modeling, Bridges, Databases, Data storage, Systems modeling, Data acquisition, Structural health monitoring, Prototyping, Data conversion

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