18 August 2003 Smart Pebble: wireless sensors for structural health monitoring of bridge decks
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Abstract
SRI International is developing a wireless sensor for monitoring the level of chloride ingress into concrete bridge decks. We call this device a Smart Pebble since it has roughly the size and weight of a typical piece of the rock aggregate that is used in such structures. It is "smart" in that it contains a chloride sensor and a radio-frequency identification (RFID) chip that can be queried remotely both to identify it and to indicate chloride concentration levels. The Smart Pebble is also powered remotely, thus precluding the need for any lifetime-limiting batteries. It is designed to be inserted in the bridge deck either during the initial construction (or during refurbishment) or in a back-filled core hole. This paper will discuss the Smart Pebble design, operation, and status.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David G. Watters, David G. Watters, Palitha Jayaweera, Palitha Jayaweera, Alfred J. Bahr, Alfred J. Bahr, David L. Huestis, David L. Huestis, Namal Priyantha, Namal Priyantha, Robert Meline, Robert Meline, Robert Reis, Robert Reis, Douglas Parks, Douglas Parks, } "Smart Pebble: wireless sensors for structural health monitoring of bridge decks", Proc. SPIE 5057, Smart Structures and Materials 2003: Smart Systems and Nondestructive Evaluation for Civil Infrastructures, (18 August 2003); doi: 10.1117/12.482397; https://doi.org/10.1117/12.482397
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