Development and Integration of Hardware and Software for Active-Sensors in Structural Monitoring

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Structural Health Monitoring (SHM) promises to deliver great benefits to many industries. Primarily among them is a potential for large cost savings in maintenance of complex structures such as aircraft and civil infrastructure. However, several large obstacles remain before widespread use on structures can be accomplished. The development of three components would address many of these obstacles: a robust sensor validation procedure, a low-cost active-sensing hardware and an integrated software package for transition to field deployment. The research performed in this thesis directly addresses these three needs and facilitates the adoption of SHM on a larger scale, particularly in the … continued below

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Overly, Timothy G.S. October 15, 2007.

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This thesis or dissertation is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 46 times. More information about this document can be viewed below.

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Structural Health Monitoring (SHM) promises to deliver great benefits to many industries. Primarily among them is a potential for large cost savings in maintenance of complex structures such as aircraft and civil infrastructure. However, several large obstacles remain before widespread use on structures can be accomplished. The development of three components would address many of these obstacles: a robust sensor validation procedure, a low-cost active-sensing hardware and an integrated software package for transition to field deployment. The research performed in this thesis directly addresses these three needs and facilitates the adoption of SHM on a larger scale, particularly in the realm of SHM based on piezoelectric (PZT) materials. The first obstacle addressed in this thesis is the validation of the SHM sensor network. PZT materials are used for sensor/actuators because of their unique properties, but their functionality also needs to be validated for meaningful measurements to be recorded. To allow for a robust sensor validation algorithm, the effect of temperature change on sensor diagnostics and the effect of sensor failure on SHM measurements were classified. This classification allowed for the development of a sensor diagnostic algorithm that is temperature invariant and can indicate the amount and type of sensor failure. Secondly, the absence of a suitable commercially-available active-sensing measurement node is addressed in this thesis. A node is a small compact measurement device used in a complete system. Many measurement nodes exist for conventional passive sensing, which does not actively excite the structure, but there are no measurement nodes available that both meet the active-sensing requirements and are useable outside the laboratory. This thesis develops hardware that is low-power, active-sensing and field-deployable. This node uses the impedance method for SHM measurements, and can run the sensor diagnostic algorithm also developed here. Finally, the need for an integrated system for SHM is of primary consideration in this thesis. Without such a system the widespread adoption of SHM will not take place, and this thesis addresses the issue by developing an integrated SHM solution. The solution incorporates active-sensing impedance-measurement based hardware and software with a combination of existing damage-detection algorithms. The result is an integrated system for in-field measurement, validation and analysis of structures. The system specifically incorporates the sensor validation procedure and sensor node also developed in this thesis. In conclusion, recommendations for the future direction of this research topic are made.

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  • Report No.: LA-14342-T
  • Grant Number: DE-AC52-06NA25396
  • Office of Scientific & Technical Information Report Number: 921906
  • Archival Resource Key: ark:/67531/metadc901385

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  • October 15, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 9, 2016, 3:44 p.m.

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Overly, Timothy G.S. Development and Integration of Hardware and Software for Active-Sensors in Structural Monitoring, thesis or dissertation, October 15, 2007; Los Alamos, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc901385/: accessed May 26, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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