Full-scale validation of wireless hybrid sensor on an in-service highway bridge

Shinae Jang; Sushil Dahal; Jingcheng Li

doi:10.1117/12.2009815

19 April 2013 Full-scale validation of wireless hybrid sensor on an in-service highway bridge

Shinae Jang, Sushil Dahal, Jingcheng Li

Author Affiliations +

Proceedings Volume 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013; 869218 (2013) https://doi.org/10.1117/12.2009815
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

With the rapid development of electrical circuits, Micro electromechanical system (MEMS) and network technology, wireless smart sensor networks (WSSN) have shown significant potential for replacing existing wired SHM systems due to their cost effectiveness and versatility. A few structural systems have been monitored using WSSN measuring acceleration, temperature, wind speed, humidity; however, a multi-scale sensing device which has the capability to measure the displacement has not been yet developed. In the previous paper, a new high-accuracy displacement sensing system was developed combining a high resolution analog displacement sensor and MEMS-based wireless microprocessor platform. Also, the wireless sensor was calibrated in the laboratory to get the high precision displacement data from analog sensor, and its performance was validated to measure simulated thermal expansion of a laboratory bridge structure. This paper expands the validation of the developed system on full-scale experiments to measure both static and dynamic displacement of expansion joints, temperature, and vibration of an in-service highway bridge. A brief visual investigation of bridges, comparison between theoretical and measured thermal expansion are also provided. The developed system showed the capability to measure the displacement with accuracy of 0.00027 in.

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Shinae Jang, Sushil Dahal, and Jingcheng Li "Full-scale validation of wireless hybrid sensor on an in-service highway bridge", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 869218 (19 April 2013); https://doi.org/10.1117/12.2009815

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KEYWORDS

Bridges

Sensors

Structural health monitoring

Sensing systems

Analog electronics

Temperature metrology

Calibration

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