A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Wireless systems for structural health monitoring
In this paper the economics of SHM for the extension of service life will be outlined. From this analysis it is concluded that there is a compelling case for the extension of service life using SHM. It will be argued that wireless sensors are a good fit for this purpose, because of their ability to be rapidly deployed and the ability to share interrogation equipment. The majority of the paper will review the various modes of wireless sensing and outline the present day pros and cons of the various modes. In wireless communication mode, traditional sensors such as metal foil strain gauges and measurement electronics are used, but the results are communicated via a wireless link. The principle advantage of this type of system is that communications can occur over distances of over a km. One major drawback of this type is that the sensor must contain its own power source. In power on measurement mode sensors traditional sensors are used and signal conditioning systems within the sensor then convert measurement into a form suitable for transmission via a radio link. The power to run the measurement electronics and the radio communication system are supplied from the interrogation system, typically through coupling coils on the sensor and the interrogator. The advantage of this type is that the sensor does not require any form of power and hence can be embedded or left in the field with no need to provide continuous power. However the range is limited by the need to access power from the interrogator. Passive wireless sensors have no internal power source and rely on the power transmitted from the interrogation system in order to carry out a measurement, but have no active electronics. The broad advantage of this type of system is that the sensor itself requires no source of power and can therefore be embedded within a structure. In general it will have a range greater than that of the power on measurement type. Several wireless sensing systems have been demonstrated in structural health monitoring applications. Over the next few years many more wireless sensing systems will be demonstrated and many more will become commercially available.
Wireless systems for structural health monitoring
In this paper the economics of SHM for the extension of service life will be outlined. From this analysis it is concluded that there is a compelling case for the extension of service life using SHM. It will be argued that wireless sensors are a good fit for this purpose, because of their ability to be rapidly deployed and the ability to share interrogation equipment. The majority of the paper will review the various modes of wireless sensing and outline the present day pros and cons of the various modes. In wireless communication mode, traditional sensors such as metal foil strain gauges and measurement electronics are used, but the results are communicated via a wireless link. The principle advantage of this type of system is that communications can occur over distances of over a km. One major drawback of this type is that the sensor must contain its own power source. In power on measurement mode sensors traditional sensors are used and signal conditioning systems within the sensor then convert measurement into a form suitable for transmission via a radio link. The power to run the measurement electronics and the radio communication system are supplied from the interrogation system, typically through coupling coils on the sensor and the interrogator. The advantage of this type is that the sensor does not require any form of power and hence can be embedded or left in the field with no need to provide continuous power. However the range is limited by the need to access power from the interrogator. Passive wireless sensors have no internal power source and rely on the power transmitted from the interrogation system in order to carry out a measurement, but have no active electronics. The broad advantage of this type of system is that the sensor itself requires no source of power and can therefore be embedded within a structure. In general it will have a range greater than that of the power on measurement type. Several wireless sensing systems have been demonstrated in structural health monitoring applications. Over the next few years many more wireless sensing systems will be demonstrated and many more will become commercially available.
Wireless systems for structural health monitoring
Drahtlose Systeme zur Zustandsüberwachung
Thomson, Douglas J. (author)
2009
11 Seiten, 2 Bilder, 1 Tabelle, 32 Quellen
Conference paper
English
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