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Proceedings Paper

Smart Pebble: wireless sensors for structural health monitoring of bridge decks
Author(s): David G. Watters; Palitha Jayaweera; Alfred J. Bahr; David L. Huestis; Namal Priyantha; Robert Meline; Robert Reis; Douglas Parks
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Paper 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.

Paper Details

Date Published: 18 August 2003
PDF: 9 pages
Proc. SPIE 5057, Smart Structures and Materials 2003: Smart Systems and Nondestructive Evaluation for Civil Infrastructures, (18 August 2003); doi: 10.1117/12.482397
Show Author Affiliations
David G. Watters, SRI International (United States)
Palitha Jayaweera, SRI International (United States)
Alfred J. Bahr, SRI International (United States)
David L. Huestis, SRI International (United States)
Namal Priyantha, SRI International (United States)
Robert Meline, California Dept. of Transportation (United States)
Robert Reis, California Dept. of Transportation (United States)
Douglas Parks, California Dept. of Transportation (United States)


Published in SPIE Proceedings Vol. 5057:
Smart Structures and Materials 2003: Smart Systems and Nondestructive Evaluation for Civil Infrastructures
Shih-Chi Liu, Editor(s)

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