structural health monitoring: the genesi perspective prof. chiara petrioli università degli studi...
TRANSCRIPT
Structural Health Monitoring:The GENESI Perspectivehttp://fp7-genesi.di.uniroma1.it
Prof. Chiara PetrioliUniversità degli Studi di Roma «La Sapienza»Project Coordinator and Director of CIS Cyber Physical Systems Laboratory
Laboratory of Cyber Physical Systems
GENESI – A Technology Enabler for Long Lasting Structural Health Monitoring
GENESI technology addresses the demand for long lasting, reliable, and flexible sensing systems, by designing and implementing a novel generation of “green wireless sensor networks” (i.e., low power energy harvesting and wake up radio equipped devices, interconnected into a network) which can be embedded in buildings and infrastructures at the time of construction and be able to provide monitoring and control intelligence over the whole structure lifetime.
GENESI – A Technology Enabler for Long Lasting Structural Health Monitoring
GENESI technology addresses the demand for long lasting, reliable, and flexible sensing systems, by designing and implementing a novel generation of “green wireless sensor networks” which can be embedded in buildings and infrastructures at the time of construction and be able to provide monitoring and control intelligence over the whole structure lifetime.
To achieve the above objectives GENESI combines advanced HW components (low power, flexible, multifunctional sensing platform equipped with a smart power unit and wake up radio capabilities) with novel energy efficient, energy harvesting and wake up radio aware communication paradigms, in-network distributed processing and reasoning mechanisms.
GENESI – A Technology Enabler for Long Lasting Structural Health Monitoring
GENESI technology addresses the demand for long lasting, reliable, and flexible sensing systems, by designing and implementing a novel generation of “green wireless sensor networks” which can be embedded in buildings and infrastructures at the time of construction and be able to provide monitoring and control intelligence over the whole structure lifetime.
The system has been designed to be interfaced to a variety of sensors, to be low power and reliable, modular, easy to deploy, manage and reconfigure.
The resulting system provides the core of the next generation of systems for structural health monitoring that are long lasting, pervasive, totally distributed and autonomous.
Why is infrastructure monitoring needed?
Because failing and collapsing structures
Do injure and kill people - this almost daily
Do cause high costs (repair, replacement,
compensating measures, damage to neighbourhood)
Do not only happen in underdeveloped and
threshold countries
Because failing and collapsing structures
• Do injure and kill people - this almost daily
Why is infrastructure monitoring needed?
Because failing and collapsing structures
• Do injure and kill people - this almost daily
• Do cause high costs (repair, replacement,
compensating measures, damage to neighbourhood)
Why is infrastructure monitoring needed?
Because failing and collapsing structures
• Do injure and kill people - this almost daily
• Do cause high costs (repair, replacement,
compensating measures, damage to neighbourhood)
• Do not only happen only in underdeveloped and
threshold countries
Why is infrastructure monitoring needed?
Terminal Collapse - Paris Airport Charles de Gaulle, 2004
Design faults
Tunnel Collapse (during construction), Chienberg Tunnel , Switzerland, 2002
Unknown or wrong interpretation of loads and strengths
Why do structures fail ?
Terminal Collapse - Paris Airport Charles de Gaulle, 2004
Design faults
Tunnel Collapse (during construction), Chienberg Tunnel , Switzerland, 2002
Unknown or wrong interpretation of loads and strengths
Excavation Collapse, Cologne, Germany, 2002
Faulty construction
Why do structures fail ?
Aging of materials/chemical reaction
Why do structures fail ?Public Swimming pool, Uster, Switzerland, 1985
Aging of materials/chemical reaction
Why do structures fail ?Public Swimming pool, Uster, Switzerland, 1985 CTV building collapse after earthquake Christchurch, NZ, 2011
Outer impacts/accidents (unexpected failure modes)
Reasons for failure: Design faults
Unknown or wrong interpretation of loads and strengths
Bad or wrong construction
Aging of materials / chemical reaction
Outer impacts, accidents (unexpected failure modes)
Or: Combination of Causes
Why do structures fail ?
Good news:
Most of the failures can be prevented or damage can be
reduced by applying risk management processes:
How to prevent failures
Good news:
Most of the failures can be prevented or damage can be
reduced by applying risk management processes:
How to prevent failures
• Preliminary investigation • Regular measurements• Contineous monitoring
Good news:
Most of the failures can be prevented or damage can be
reduced by applying risk management processes:
How to prevent failures
• Preliminary investigation • Regular measurements• Contineous monitoring
SHM – structural health monitoring
Relative damage
How to prevent failures
Instrumented Bridge
Instrumented Underground Tunnel
Pont de la Poya, Fribourg, CH
Deployment scenarios of the GENESI system
Rome B1 Underground
Wireless system without cabling or wiring;
Independence from electronic infrastructure (powering, data transmission);
Easy deployment (adding and removal of nodes);
Remote system reconfiguration;
Many analog and digital interfaces available on each node;
Flexible monitoring rates and advanced sampling mechanisms;
Alarming when values are out of expected range; Service
alarms when system is not in normal operation mode.
GENESI – SHM @ a new level
System is designed for long lifetime without maintenance (self powering) All data can be transmitted via Internet into a data base Data accessible on webpages with time-line graphs for SHM experts
Also for constructions that are already accomplished the GENESI SHM:
Cables do not change the esthetics of a construction and cannot be damaged; Small networks with only a few nodes and sensors are feasible and economic; Most types of existing sensors are or can easily be implemented in the system; System can be extend later, when needed: instrumented sections can be added
ore removed without affecting system operation, the system can be reconfigured from remote.
GENESI – SHM @ a new level
Thank you for your attention
Prof. Chiara Petrioli, Project Coordinator, [email protected]
Ing. Holger Worsching, WP6 leader, Solexperts
http://fp7-genesi.di.uniroma1.it