Development of Autonomous Triggering Instrumentation
Triggering instrumentation for autonomous monitoring of load-induced strain is described for economical, fast bridge inspection. The development addresses one aspect for the management of transportation infrastructure - bridge monitoring and inspection. The objectives are to provide quantitative performance information from a load test, to minimize the setup time at the bridge, and to minimize the closure time to traffic. Multiple or networked measurements can be made for a prescribed loading sequence. The proposed smart system consists of in-situ strain sensors, an embedded data acquisition module, and a measurement triggering system. A companion control unit is mounted on the truck serving as the load. As the truck moves to the proper position, the desired measurement is automatically relayed back to the control unit. In this work, the testing protocol is developed and the performance parameters for the triggering and data acquisition are measured. The test system uses a dedicated wireless sensor mote and an infrared positioning system. The electronic procedure offers improvements in available information and economics.
T. M. Swift et al., "Development of Autonomous Triggering Instrumentation," Proceedings of SPIE, SPIE, Jan 2008.
The definitive version is available at http://dx.doi.org/10.1117/12.776008
Electrical and Computer Engineering
Keywords and Phrases
Autonomous Monitoring; Triggering Instrumentation; Loads (Mechanics); Strains and stresses
Article - Conference proceedings
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