United States Department of Transportation
i
SMART PEBBLES : passive embeddable wireless sensors for chloride ingress monitoring in bridge decks.
-
2003-06-01
-
[PDF-2.35 MB]
Details:
-
Alternative Title:Passive embeddable wireless sensors for chloride ingress monitoring in bridge deck.
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:SRI International has developed 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. The Pebble devices constructed can
transpond sensor data through as much as 6 inches of concrete. We have developed
stable reference electrodes in a laboratory environment, with 4000 hours of continuous
measurement. Unfortunately, the resulting electrochemical cell in the Pebble device
has limited stability over the intended design life.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
