Abstract
In this paper, a data compression technology-based intelligent data acquisition (IDAQ) system was developed for structural health monitoring of civil structures, and its validity was tested using random signals (El-Centro seismic waveform). The IDAQ system was structured to include a high-performance CPU with large dynamic memory for multi-input and output in a radio frequency (RF) manner. In addition, the embedded software technology (EST) has been applied to it to implement diverse logics needed in the process of acquiring, processing and transmitting data. In order to utilize IDAQ system for the structural health monitoring of civil structures, this study developed an artificial filter bank by which structural dynamic responses (acceleration) were efficiently acquired, and also optimized it on the random El-Centro seismic waveform. All techniques developed in this study have been embedded to our system. The data compression technology-based IDAQ system was proven valid in acquiring valid signals in a compressed size.
Highlights
Infrastructure is always exposed to unexpected weather conditions and consequent possibility of damage and strain as well as natural aging, and so its life span decreases [1,2]
The estimated reconstruction error (RE) shows 0.01174, and approximately 70% of reconstruction capability is found against total original signals
This study develops a data compression technology-based intelligent data acquisition (IDAQ) system for the efficient by overcoming the limitations of the conventional hardware-based wired and wireless structural health monitoring (SHM) system and adopting the latest measuring system and technology
Summary
Infrastructure is always exposed to unexpected weather conditions and consequent possibility of damage and strain as well as natural aging, and so its life span decreases [1,2]. (i) acquire and process a large amount of diverse data on a real-time basis; (ii) edit measuring logic quickly and accurately and expand its functions and (iii) provide system safety and data quality up to the level of the commonly used (wired) measuring system even with the proven RF method For these purposes, a software design technology-adopted, embedded software technology (EST)-based data acquisition (DAQ) system could be an alternative, overcoming the limitations of the conventional hardware-based wired and wireless measuring systems. The embedded logic can be operated under the real-time operating systems (RTOS) After all, this kind of EST-based DAQ system can effectively improve the weakness of the conventional hardware-based wired and wireless SHM system and considerably reduce time and efforts needed to develop a user-centered, high-performance SHM system which is directly applicable to actual structure. It was confirmed that the system would be available as a user-centered SHM system because the measuring logic requested in a software design system can be and quickly developed and embedded
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