Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures (original) (raw)
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Smart Sensor Technics for Structural Health Monitoring of Civil Engineering Structures
2018
Structural Health Monitoring (SHM) aims to develop automated systems for the continuous monitoring, inspection and damage detection of structures with minimum labour involvement. The first step to set up a SHM system is to incorporate a level of structural sensing capability that is reliable and possesses longterm stability. Smart sensing technologies including the applications of fibre optic sensors, piezoelectric sensors, magnetostrictive sensors and selfdiagnosing fibre reinforced composites, possess very important capabilities of monitoring various physical or chemical parameters related to the health and therefore, durable service life of structures. In particular, piezoelectric sensors and magnetorestrictive sensors can serve as both sensors and actuators, which make SHM to be an active monitoring system. Thus, smart sensing technologies are now currently available, and can be utilized to the SHM of civil engineering structures. In these paper, the application of smart materia...
Smart Sensors for Structural Health Monitoring-Overview , Challenges and Advantages Vimal AGARWAL
2018
Pervasive, large-scale infrastructure forms the backbone of an industrialized nation and thus represents a high capital investment. This key asset of the country, is prone to large scale destruction and potential threats to its life, without sufficient precautions – such as preventative construction designs, health monitoring and maintenance. Structural health monitoring and maintenance of infrastructure is paramount. While Structural Health Monitoring(SHM) using traditional sensor technologies has been extensively researched for over a couple of decades, enthusiastic efforts are being made for the adoption of smart sensors. Smart sensors would provide efficient and sustainable health monitoring, and at the same time can provide precursors to imminent structural health issues, as well as estimates of remaining life, facilitating a timely deployment of remedial. This paper presents a perspective on use of smart sensors to detect and localize damage while meeting the stringent perform...
Structural Health Monitoring using Smart Material and Smart System
There is a phenomenal rise in construction activities in the field of civil engineering in the recent years. Major structures like building, bridges, dams, are subjected to severe loading and their performance is likely to change with time. It is therefore, necessary to check the performance of a structure through continuous monitoring. If performance deviates from the design parameter, appropriate maintenance is required. The life of the structure depends on initial strength and the post construction maintenance. It is for this reason that the necessity of structural health monitoring (SHM) is emphasized worldwide. A technique is required for structural health monitoring (SHM), which should carry out continuous monitoring of structure, as well as sensitive and cost effective. These Unique properties of direct and converse piezoelectric effects enable piezo electrio-ceramic (pzt) patch to act both as anactuator and as a sensor simultaneously. Making use of the sensing capability the of PZT patch, conductance signature of the structure can be obtained against which health monitoring of the structure can be done. Signature of the structure in healthy state is called the base line signature. It is compared with signature obtained after a time lapse, which is called secondary state conductance signature. The characteristic feature of the EMI technique is that it activates higher frequency modes of the structure.
非破壊検査, 2013
is based on physical principles where acoustics and electromagnetics play a very significant role. NDT is specifically performed at damage critical locations and at defined intervals in time. Hand held but possibly also automated inspection processes are common. However often the locations to be inspected are quite hidden or generally difficult to access and may therefore lead to a time and hence cost consuming process. A means to alleviate those disadvantages has emerged with advanced sensor and materials technologies which allow sensors, or better sensor systems, to be adapted or generally integrated onto or into a structural component allowing NDT to become an integral part of the component. This is what is considered today to be structural health monitoring (SHM). Many of the SHM systems can therefore be seen as derivatives of NDT technology developed in a classical way. This paper will make reference to a variety of vibrations and elastic waves based principles used such as classical modal analysis, acoustic emission, phased array ultrasonics and guided waves as well as electromagnetic principles considering electromagnetic impedance, permeability, Barkhausen noise and higher harmonics analysis including advanced sensor signal processing.
Smart Sensing in the Light of Non-Destructive Testing and Structural Health Monitoring
Non-destructive testing (NDT) is based on physical princi-ples where acoustics and electromagnetics play a very sig-nificant role. NDT is specifically performed at damage critical locations and at defined intervals in time. Hand held but possibly also automated inspection processes are com-mon. However often the locations to be inspected are quite hidden or generally difficult to access and may therefore lead to a time and hence cost consuming process. A means to alleviate those disadvantages has emerged with advanced sensor and materials technologies which allow sensors, or better sensor systems, to be adapted or generally integrated onto or into a structural component allowing NDT to become an integral part of the component. This is what is considered today to be structural health monitoring (SHM). Many of the SHM systems can therefore be seen as derivatives of NDT technology developed in a classical way. This paper will make reference to a variety of vibrations and elastic waves ...
Smart sensing for structural health monitoring (S3HM)
Proceedings of SMSST'07, World Forum on Smart Materials and Smart Structures Technology (SMSST’07), China, 22-27 May, 2007, 2008
Smart Sensing for Structural Health Monitoring (S3HM) is a collaborative research project running under the ESF (European Science Foundation) Eurocores S3T program.The objective of the project is to combine the most recent developments in sensor and actuator technology, networks, signal processing and computer techniques to explore new avenues in structural health monitoring (SHM). The consortium involves 5 research centres with complementary expertise: smart materials and structures, signal processing, identification, model updating, damage modelling, wave propagation. The project aims at addressing the following issues: using smart sensing technologies for SHM, extracting features relevant to damage and immune to variability, designing robust methods for autonomous SHM systems.
A review of some advanced sensors used for health diagnosis of civil engineering structures
Measurement, 2018
The developments in structural health monitoring techniques have led to the invention of various sensors that can be effective damage indicator. Due to environmental or electromagnetic effects and need for constant energy source, the traditional sensors are unable to provide accurate and continuous measurements. In light of these events, new and improved sensors have been developed, along with wireless technology, to assist the monitoring process. With the need of detecting more than one damage parameters, multiplexed sensors have been the main interest of researchers. This paper deals with the different sensors used for determination of strain, acceleration and corrosion. A brief comparative study has been performed and presented in the following review paper. Multiplexed Fiber optics sensor have proved quite effective for SHM and proved to be a good competitor with other sensors. Optimum Sensor Placement technique developed for low level damage diagnosis is Iterated Improved Reduced System (IIRS) Method.
Advanced Monitoring of Structures and Infrastructures Through Smart Composite Sensors and Systems
Lecture Notes in Civil Engineering, 2021
The monitoring of the performance conditions of structures and infrastructures during their service life and after critical events is an extremely timely topic. The potentialities of novel sensors and systems stay in their reliability and flexibility. Indeed, due to their peculiar characteristics which could possess localized features, structures should be instrumented by diffused sensing systems. Traditional sensors could generally be placed only in a limited number of locations by external applications: these occurrences weaken their durability and reliability. Boosted performance are coming from novel smart materials which can combine structural performance with enhanced properties, as sensing ones. In particular, the authors have made several research efforts on the preparation and the application of self-sensing structural materials, cement-and clay-based, doped with conductive fillers. This paper presents the investigation of sensing capabilities and the possible applications of cementitious materials with different carbon-based fillers. Such composites could be embedded or can constitute structural elements, thus generating a diffused smart monitoring system. Possible applications stay in the monitoring of all kinds of concrete structures and infrastructures, including dynamic monitoring, traffic monitoring, damage detection, analysis of the strain/stress field variations.
Smart sensing technology for structural health monitoring
2004
Smart" sensors with embedded microprocessors and wireless communication links have the potential to fundamentally change the way civil infrastructure systems are monitored, controlled, and maintained. Indeed, a 2002 National Research Council Report [1] noted that the use of networked systems of embedded computers and sensors throughout society could well dwarf all previous milestones in the information revolution. However, a framework does not yet exist that can allow the distributed computing paradigm offered by smart sensors to be employed for structural health monitoring and control systems; current algorithms assume that all data is centrally collected and processed. Such an approach does not scale to systems with densely instrumented arrays of sensors that will be required for the next generation of structural health monitoring and control systems. This paper provides a brief introduction to smart sensing technology and identifies some of the opportunities and associated challenges.