The SmartBrick network is an autonomous and wireless solution for structural health monitoring of civil infrastructures.
The base station is currently in its third generation and has been laboratory- and field-tested
in the United States and Italy. The second generation of the sensor nodes has been laboratory-tested as of
publication. In this paper, we present recent enhancements made to hardware and software of the SmartBrick
platform. Salient improvements described include the development of a new base station with fully-integrated
long-range GSM (cellular) and short-range ZigBee communication. The major software improvement described
in this paper is migration to the ZigBee PRO stack, which was carried out in the interest of interoperability. To
broaden the application of the platform to critical environments that require survivability and fault tolerance,
we have striven to achieve compliance with military standards in the areas of hardware, software, and communication.
We describe these efforts and present a survey of the military standards investigated. Also described
is instrumentation of a three-span experimental bridge in Washington County, Missouri; with the SmartBrick
platform. The sensors, whose output is conditioned and multiplexed; include strain gauges, thermocouples, push
potentiometers, and three-axis inclinometers. Data collected is stored on site and reported over the cellular network.
Real-time alerts are generated if any monitored parameter falls outside its acceptable range. Redundant
sensing and communication provide reliability and facilitate corroboration of the data collected. A web interface
is used to issue remote configuration commands and to facilitate access to and visualization of the data collected.