Structural Health Monitoring - Measurement Methods and Practical Applications

10.5772/65818 ◽  
2017 ◽  
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Measurement Methods ◽  
Practical Applications ◽  
Structural Health

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.

scholarly journals Specifications and applications of the technical code for monitoring of building and bridge structures in China

2017 ◽  
Vol 9 (1) ◽  
pp. 168781401668427 ◽  
Author(s):  
Y Yang ◽  
QS Li ◽  
BW Yan
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Large Scale ◽  
Monitoring Methods ◽  
Practical Applications ◽  
Technical Parameters ◽  
Monitoring Techniques ◽  
Structural Health ◽  
Bridge Structures ◽  
Complex Engineering

Recently, the exclusive compulsory technical code (GB 50982-2014) for structural health monitoring of buildings and bridges in China has been developed and implemented. This code covers the majority of the field monitoring methods and stipulates the corresponding technical parameters for monitoring of high-rise structures, large-span spatial structures, bridges and base-isolated structures. This article first presents the comprehensive review and linear comparison of existing structural health monitoring codes and standards. Subsequently, the progress of the codification of GB 50982-2014 is imparted and its main features and specifications are summarized. Finally, in accordance with GB50982-2014, several representative structural health monitoring practical applications of large-scale infrastructures in China are exemplified to illustrate how this national code can bridge the gap between theory and practical applications of structural health monitoring. This technical code is an important milestone in the application of well-established structural health monitoring techniques into the realistic and complex engineering projects. Also, it can provide abundant and authoritative information for practitioners and researchers involving the structural health monitoring techniques.

scholarly journals Experimental Evaluation of Miniature Impedance Board for Loosening Monitoring of the Threaded Pipe Connection

2021 ◽  
Vol 9 ◽  
Author(s):  
Yabin Liang ◽  
Yixuan Chen ◽  
Zuocai Zhang ◽  
Qian Feng
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Structural Damage ◽  
Damage Identification ◽  
Low Cost ◽  
Impedance Measurement ◽  
Measurement Procedure ◽  
Practical Applications ◽  
Electromechanical Impedance ◽  
Structural Health

Electromechanical impedance (Electromechanical impedance)-based methods as potential nondestructive evaluation (NDT) techniques have been widely used in the field of structural health monitoring (SHM), especially for the civil, mechanical, and aerospace engineering fields. However, it is still difficult to apply in practical applications due to the limitations of the impedance measurement hardware, which is usually expensive, bulky, and heavy. In this paper, a small, lightweight, and low power consumption EMI-based structural health monitoring system combined with the low-cost miniature impedance board AD5933 was studied experimentally to investigate its quantifiable performance in impedance measurement and structural damage identification. At first, a simple impedance test with a free PZT patch was introduced to present the impedance calibration and measurement procedure of AD5933, and then its calibration performance was validated by comparing the signature with the one measured by a professional impedance analyzer (WK6500B). In order to further validate the feasibility and effectiveness of the AD5933 board in practical applications, a threaded pipe connection specimen was assembled in the laboratory and then connected with the AD5933 to acquire its impedance signatures under different loosening severities. The final results demonstrated that the impedance measured by the AD5933 show a good consistency with the measurements by the WK6500B, and the evaluation board could be successfully utilized for the loosening severities identification and quantitatively evaluation.

scholarly journals CASE STUDY OF STRUCTURAL HEALTH MONITORING IN INDIA AND ITS BENEFITS

2020 ◽  
Vol 11 (1) ◽  
pp. 1-7
Author(s):  
Riya Bhandari
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Complex Structure ◽  
Modern World ◽  
Practical Applications ◽  
Structural Health ◽  
Construction Methods ◽  
Safety And Reliability ◽  
Civil Sector

In today’s modern world, the development is at its peak. Due to increasing development, thousands of new buildings, tunnels, bridges, expressways, and many challenging and complex structure are being made day by day for suiting the increasing needs of people. The development is also seen in the new materials and techniques used in construction methods. Due to this increasing construction of vast structures, the analysis of structures has also become a major challenge as maintaining the integrity of the structure is of utmost importance. Traditional methods of structure analysis are not much beneficial and are not sufficient enough. Structural health monitoring (SHM) is a great development in the analysis of the structures for damage detection and determination of cracks and defects present in the structure. SHM system improves the safety and reliability of the structures; reduce maintenance costs and also helps in extending the useful life of the structures. Still the practical applications of this method are not much used and are still behind in the civil sector in India.

Acousto-ultrasonics-based health monitoring for nano-engineered composites using a dispersive graphene-networked sensing system

2020 ◽  
pp. 147592172092974
Author(s):  
Yehai Li ◽  
Kai Wang ◽  
Qiang Wang ◽  
Jianwei Yang ◽  
Pengyu Zhou ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Lead Zirconate Titanate ◽  
Health Monitoring ◽  
Lead Zirconate ◽  
Ultrasonic Waves ◽  
Sensing Element ◽  
Engineering Structures ◽  
Practical Applications ◽  
Structural Health ◽  
Sensing System

Sensing is a fundamental yet crucial part of a functional structural health monitoring system. Substantial research has been invested in developing new sensing techniques to enhance sensing efficiency and accuracy. Practical applications of structural health monitoring approaches to real engineering structures require strict criteria for the sensing system (e.g. weight, position, intrusion and endurance), which challenge existing sensing techniques. The boom in nanotechnology has offered promising solutions for the development of new sensing approaches. However, a bottleneck still exists when considering the density of sensors and surface-mounted modality of installation. In this study, graphene nanoparticles are dispersed into a glass fibre/epoxy composite to form a dispersive network sensing system. The piezoresistivity of the graphene-formed network changes locally as a result of the change of inter-nanoparticle distances which triggers the ‘tunnelling effect’ and drives the sensor to respond to propagating elastic waves. Due to the dense graphene network formed within the composite, only a small area is required, functioning as a single sensing element to capture ultrasonic waves. To validate such capability, passive acoustic emission tests and active guided ultrasonic wave tests are performed individually. The graphene-networked sensing system can precisely capture wave signals which contain effective features to identify impact spot or damage location. Integrating passive graphene-formed network and active lead zirconate titanate wafers can form a dense network, capable of fulfilling general structural health monitoring tasks.

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 Using Fiber Optic Sensors for Bridge Monitoring

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Amal Jayawardena ◽  
◽  
Gayan Appuhamillage ◽  
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Fiber Optic Sensors ◽  
Strain Gauges ◽  
Bridge Monitoring ◽  
Practical Applications ◽  
Structural Health ◽  
Before And After ◽  
Fbg Sensors ◽  
The Operating Mechanism

This paper presents the data obtained from monitoring a steel Struss bridge using Fiber Bragg Grating (FBG) sensors before and after a proposed repair for a crack propagation in the end plates. This paper details the operating mechanism behind the FBG sensors and advantages of using FBG sensors over resistive foil strain gauges for bridge structural health monitoring and also details how cracks on the outer web’s end plate originated and then provides a step-by-step guide to the completed repair. This technology can be use in other practical applications where structural health monitoring is needed.

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