Structural health monitoring (SHM) is a tool which helps engineers in improving the safety and
maintainability of critical structures. Various sensing technologies are combined with embedded
measurement controllers to process and analyze real-time data. Basic functions performed by SHM
are monitoring and testing the health and performance of structures which include bridges, dams,
buildings, stadiums, large machinery and equipment. SHM implements damage identification
strategy for various structures which helps in avoiding future damage. SHM is used to measure
stress on wind turbine blades, and temperature and stress monitoring on rails. It also finds
application in implanted sensors in concrete, wood and steel for the monitoring of infrastructure. In
medical sector it is used for precision stress monitoring on bone implants and prosthesis.
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'There are various structures worldwide which are hundreds of years old and are declared as
national or international heritage structures. These structures are attracting people from all corners
of the world, increasing the profits of that country. Structures such as Taj Mahal, Eiffel Tower are
the icons of India and France, respectively. Countries are giving more importance to such
infrastructure for prolonging the life of heritage structures.
Also, new security norms are making it compulsory for the infrastructure firms to use SHM. These
factors are driving the SHM market worldwide. Moreover, new technological developments such as
highly responsive sensors and data sharing techniques are improving the accuracy of SHM. Huge
amount of operating costs are saved in long term due to the usage of SHM, which is driving the
market for SHM. Use of SHM during the construction phase of an infrastructure will help in
identifying the loopholes in its construction and design.
SHM system requires high energy for functioning, especially, the wireless SHM system. This
increases the cost and energy consumption. Sensors which are collecting data are having low
multiplexing capabilities, reducing the number of data points collected from the measurement. The
amount of data which is collected from the readings becomes exhaustive. Manual data collection
proves to be a difficult task as many readings are taken from the sensors which are placed all over
the structure leading to errors.
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Moreover, large amount of manpower is required for manual data collection further increasing the
cost. However, latest technological developments have made data collection easy through
automation and data collection techniques. New technologies and trends are improving the accuracy
and data collection rates of SHM. Non-destructive monitoring, non-contact vibration measurement
systems are the new trends in SHM. These techniques are improving the SHM accuracy.
As the industries across the globe are going through a phase of change in the infrastructure, large
projects are being undertaken to fulfil this change. Further, increasing number of sporting events
such as Olympics and FIFA World Cup are creating demand for infrastructure including the
stadiums. Governments are promoting the use of SHM as it increases the security of the
infrastructure. Furthermore, large projects such as smart cities are using SHM to monitor the health
of the overall infrastructure. These projects present tremendous opportunity for SHM market to
grow.
Major players in the SHM market are Advitam, Inc., COWI A/S, Digitexx Data Systems, Inc.,
Geocomp Corp., Geokon, Inc., Geosig Ltd., Hottinger Baldwin Messtechnik GmbH (HBM), Nova
Metrix LLC, Sodis Lab, Strainstall Uk Ltd.
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