scholarly journals A Review of Machine Vision-Based Structural Health Monitoring: Methodologies and Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
X. W. Ye ◽  
C. Z. Dong ◽  
T. Liu
Keyword(s):  
Structural Health Monitoring ◽  
Machine Vision ◽  
Health Monitoring ◽  
Electromagnetic Interference ◽  
State Inspection ◽  
Physical Parameters ◽  
Long Distance ◽  
Structural Dynamic ◽  
Practical Applications ◽  
Structural Health

In the past two decades, a significant number of innovative sensing and monitoring systems based on the machine vision-based technology have been exploited in the field of structural health monitoring (SHM). This technology has some inherent distinctive advantages such as noncontact, nondestructive, long distance, high precision, immunity to electromagnetic interference, and large-range and multiple-target monitoring. A lot of machine vision-based structural dynamic measurement and structural state inspection methods have been proposed. Real-world applications are also carried out to measure the structural physical parameters such as the displacement, strain/stress, rotation, vibration, crack, and spalling. The purpose of this review article is devoted to presenting a summary of the basic theories and practical applications of the machine vision-based technology employed in structural monitoring as well as its systematic error sources and integration with other modern sensing techniques.

scholarly journals Structural Health Monitoring of a Tall Building during Construction with Fiber Bragg Grating Sensors

2012 ◽  
Vol 8 (10) ◽  
pp. 272190 ◽  
Author(s):  
D. S. Li ◽  
L. Ren ◽  
H. N. Li ◽  
G. B. Song
Keyword(s):  
Structural Health Monitoring ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Electromagnetic Interference ◽  
Structural Integrity ◽  
Tall Building ◽  
Bragg Grating ◽  
Long Distance ◽  
Structural Health ◽  
Fiber Bragg Grating Sensors

Fiber Bragg grating sensors demonstrate a great potential as a structural health monitoring tool for civil structures to ensure structural integrity, durability, and reliability. The advantages of applying fiber optic sensors to a tall building include their immunity to electromagnetic interference and their multiplexing ability to transfer optical signals over a long distance. In the work, fiber Bragg grating sensors, consisting of strain and temperature sensors, are applied to structural monitoring of an 18-floor tall building since the date of its construction. The strain transferring rate from host material to the fiber core is discussed and the calibration of packaged fiber Bragg grating sensor is presented. The main purposes of the investigation are monitoring temperature evolution history within concrete during the pouring and curing process, measuring variation of the main column strains on the underground floor while upper 18 floors were subsequently added on, and monitoring relative displacement between two foundation blocks. Fiber Bragg grating sensors have been installed and integrated continuously for more than five months. Monitoring results of temperature and strain are presented in the paper. Furthermore, temperature lag behavior between concrete and its surrounding air is investigated.

scholarly journals A Wireless Strain Sensor Network for Structural Health Monitoring

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Chengyin Liu ◽  
Jun Teng ◽  
Ning Wu
Keyword(s):  
Structural Health Monitoring ◽  
Sensor Network ◽  
Health Monitoring ◽  
Evaluation System ◽  
Strain Sensor ◽  
Modal Testing ◽  
Dynamic Strain ◽  
Structural Dynamic ◽  
Structural Health ◽  
Strain Monitoring

Structural strain under external environmental loads is one of the main monitoring parameters in structural health monitoring or dynamic tests. This paper presents a wireless strain sensor network (WSSN) design for monitoring structural dynamic strain field. A precision strain sensor board is developed and integrated with the IRIS mote hardware/software platform for multichannel strain gauge signal conditioning and wireless monitoring. Measurement results confirm the sensor’s functionality regarding its static and dynamic characterization. Furthermore, in order to verify the functionality of the designed wireless strain sensor for dynamic strain monitoring, a cluster-star network evaluation system is developed for strain modal testing on an experimental steel truss structure. Test results show very good agreement with the finite element (FE) simulations. This paper demonstrates the feasibility of the proposed WSSN for large structural dynamic strain monitoring.

scholarly journals Recent Progress of Fiber-Optic Sensors for the Structural Health Monitoring of Civil Infrastructure

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4517
Author(s):  
Tiange Wu ◽  
Guowei Liu ◽  
Shenggui Fu ◽  
Fei Xing
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
Materials Science ◽  
Fiber Optic Sensors ◽  
Civil Infrastructure ◽  
Basic Principles ◽  
Structural Health ◽  
Sensing Systems

In recent years, with the development of materials science and architectural art, ensuring the safety of modern buildings is the top priority while they are developing toward higher, lighter, and more unique trends. Structural health monitoring (SHM) is currently an extremely effective and vital safeguard measure. Because of the fiber-optic sensor’s (FOS) inherent distinctive advantages (such as small size, lightweight, immunity to electromagnetic interference (EMI) and corrosion, and embedding capability), a significant number of innovative sensing systems have been exploited in the civil engineering for SHM used in projects (including buildings, bridges, tunnels, etc.). The purpose of this review article is devoted to presenting a summary of the basic principles of various fiber-optic sensors, classification and principles of FOS, typical and functional fiber-optic sensors (FOSs), and the practical application status of the FOS technology in SHM of civil infrastructure.

scholarly journals Structural Health Monitoring Applications in Tall Buildings

2020 ◽  
Vol 198 ◽  
pp. 02020
Author(s):  
Yifan Zhao
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Tall Buildings ◽  
Modal Parameter ◽  
Index Method ◽  
Structural Dynamic ◽  
Modal Parameter Identification ◽  
Structural Health ◽  
Whole Process ◽  
Neural Network Algorithm

Since there is not much research on structural health monitoring (SHM) applications in tall buildings nowadays, this paper gives a proposal of how it can be applied on skyscrapers. Covering the whole process of SHM, this paper focuses more on the diagnostic algorithms, including Structural dynamic index method, Modal parameter identification method Neural network algorithm and Genetic algorithm and how these algorithms can be used in SHM. After introducing the basic process of SHM, an example is given to show how these principles can be applied in this over 400m building. And after all these introductions, a conclusion can be drawn that the structural health monitoring system can be applied properly in tall buildings following the way proposed in this paper.

scholarly journals Ultrasonic Structural Health Monitoring Using Fiber Bragg Grating

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3395 ◽  
Author(s):  
Qi Wu ◽  
Yoji Okabe ◽  
Fengming Yu
Keyword(s):  
Structural Health Monitoring ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Waveform Analysis ◽  
Bragg Grating ◽  
Ultrasonic Detection ◽  
Practical Applications ◽  
Structural Health ◽  
Fbg Sensor ◽  
Industrial Sectors

The fiber Bragg grating (FBG) sensor, which was developed over recent decades, has been widely used to measure manifold static measurands in a variety of industrial sectors. Multiple experiments have demonstrated its ability in ultrasonic detection and its potential in ultrasonic structural health monitoring. Unlike static measurements, ultrasonic detection requires a higher sensitivity and broader bandwidth to ensure the fidelity of the ultrasonic Lamb wave that propagates in a plate-like structure for the subsequent waveform analysis. Thus, the FBG sensor head and its corresponding demodulation system need to be carefully designed, and other practical issues, such as the installation methods and data process methods, should also be properly addressed. In this review, the mature techniques of FBG-based ultrasonic sensors and their practical applications in ultrasonic structural health monitoring are discussed. In addition, state-of-the-art techniques are introduced to fully present the current developments.

Structural Health Monitoring on Real Scale Model of a Masonry Triumphal Arch

2007 ◽  
Vol 347 ◽  
pp. 279-284
Author(s):  
Giovanni Damonte ◽  
Stefano Podestà ◽  
Giuseppe Riotto ◽  
Sergio Lagomarsino ◽  
Georges Magonette ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Dynamic Behaviour ◽  
Structural Safety ◽  
Scale Model ◽  
Research Centre ◽  
Structural Dynamic ◽  
Measurement Variability ◽  
Structural Health ◽  
Real Scale

Monitoring represents one solution for the safeguard of historical buildings. The need for a non-destructive and comprehensive monitoring methodology suggests using related to Structural Health Monitoring. This paper is intended to present the outcomes of an experimental campaign on a masonry triumphal arch representing a real scale model of a church part, which was built outside ELSA laboratory at the Joint Research Centre of European Commission. This study aims to evaluate the damage pattern of the structure through simplified dynamic methods producing a quick evaluation of structural safety, easy to use on real cases. As in traditional monitoring, both the instrumentation precision and the measurement variability due to the different testing condition (e.g. ambient conditions) have to be considered. The related effects on the structural dynamic behaviour were analysed and evaluated in order to distinguish an effective change in the “structural health” (a real damage) from an alteration caused by external conditions (a “false positive”). Once studied such effects, settlements were induced to one column base through an “ad hoc” device. Varying the settlement width, three damage levels were obtained in the structure. For each state the structural dynamic properties and their variation were evaluated. Sensitivity of dynamic behaviour to structural damage and to its changes was analysed comparing the results for each level.

scholarly journals Structural Health Monitoring Using High-Frequency Electromechanical Impedance Signatures

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
Wei Yan ◽  
W. Q. Chen
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
High Frequency ◽  
Local Area ◽  
Physical Parameters ◽  
Electromechanical Impedance ◽  
Structural Health ◽  
Structure Changes ◽  
High Frequency Excitation ◽  
Frequency Excitation

An overview of recent advances in electromechanical impedance- (EMI-) based structural health monitoring is presented in this paper. The basic principle of the EMI method is to use high-frequency excitation to sense the local area of a structure. Changes in impedance indicate changes in the structure, which in turn indicate that damages appear. An accurate EMI model based on the method of reverberation-ray matrix is introduced to correlate changes in the signatures to physical parameters of structures for damage detection. Comparison with other numerical results and experimental data validates the present model. A brief remark of the feasibility of implementing the EMI method is considered and the effects of some physical parameters on EMI technique are also discussed.

scholarly journals Plastic Optical Fibre Sensors for Structural Health Monitoring: A Review of Recent Progress

2009 ◽  
Vol 2009 ◽  
pp. 1-13 ◽  
Author(s):  
K. S. C. Kuang ◽  
S. T. Quek ◽  
C. G. Koh ◽  
W. J. Cantwell ◽  
P. J. Scully
Keyword(s):  
Structural Health Monitoring ◽  
Optical Fibre ◽  
Health Monitoring ◽  
Structural Engineering ◽  
Low Cost ◽  
Physical Parameters ◽  
Optical Fibres ◽  
Engineering Structures ◽  
Structural Health ◽  
Optical Fibre Sensors

While a number of literature reviews have been published in recent times on the applications of optical fibre sensors in smart structures research, these have mainly focused on the use of conventional glass-based fibres. The availability of inexpensive, rugged, and large-core plastic-based optical fibres has resulted in growing interest amongst researchers in their use as low-cost sensors in a variety of areas including chemical sensing, biomedicine, and the measurement of a range of physical parameters. The sensing principles used in plastic optical fibres are often similar to those developed in glass-based fibres, but the advantages associated with plastic fibres render them attractive as an alternative to conventional glass fibres, and their ability to detect and measure physical parameters such as strain, stress, load, temperature, displacement, and pressure makes them suitable for structural health monitoring (SHM) applications. Increasingly their applications as sensors in the field of structural engineering are being studied and reported in literature. This article will provide a concise review of the applications of plastic optical fibre sensors for monitoring the integrity of engineering structures in the context of SHM.

DETECTION OF DAMAGE LOCATION USING A NOVEL SUBSTRUCTURE-BASED FREQUENCY RESPONSE FUNCTION APPROACH WITH A WIRELESS SENSING SYSTEM

2012 ◽  
Vol 12 (04) ◽  
pp. 1250029 ◽  
Author(s):  
T. K. LIN ◽  
S. L. HUNG ◽  
C. S. HUANG
Keyword(s):  
Structural Health Monitoring ◽  
Monitoring System ◽  
Health Monitoring ◽  
Dynamic Properties ◽  
Maintenance Cost ◽  
Structural Dynamic ◽  
Health Monitoring System ◽  
Structural Health ◽  
Damage Location ◽  
Structural Health Monitoring System

This paper intends to detect the damage locations for building structures under an earthquake excitation using a novel substructure-based FRF approach with a damage location index (SubFRFDI). An Imote2.NET-based wireless structural health monitoring system was developed and employed in the experimental studies for the sake of deployment flexibility, low maintenance cost, low power consumption, self-organization capability, and wireless communication capability. The feasibility of the proposed approach for damage detection was examined using the numerical response of a six-storey shear plane frame structure subjected to a base excitation. The results demonstrate that the SubFRFDI can be successfully used to identify the damage of different levels at a single site or multiple sites. The SubFRFDI is independent of the responses to various input earthquake excitations. Even with the addition of noises, the SubFRFDI still functions well. The feasibility and robustness of the proposed Imote2.NET-based wireless structural health monitoring system were assessed using a 1/8-scale three-storey steel-frame model. Following this, the proposed SubFRFDI was further applied to identifying the damage locations in a 1/4-scale six-storey steel structure with the proposed Imote2.NET-based wireless monitoring system. It was confirmed experimentally that good data transportation quality can be achieved via reliable data transmission and sensing protocol in identifying the structural dynamic properties, and the proposed SubFRFDI can be used to identify the damage locations effectively.

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