MicroStrains solar powered wireless sensors are used in structural health monitoring systems to measure strain, displacement, load and vibration in bridges. Information derived from the sensors is compared to theoretical data obtained from mathematical models. The comparison of actual verses theoretical behavior enables engineers to determine whether traffic loads have increased, pinpoint areas where fatigue may be occurring and to see a redistribution of loads throughout the structure caused by a failing or damaged member.

MicroStrains wireless sensors are already in place on the Corinth Canal Bridge in Greece and an Interstate 95 bridge in New London, Connecticut, the sensors harvest energy from the sun using 6-by-9-inch photovoltaic panels. The panels are linked to rechargeable batteries and power microelectronic modules that record data from inside watertight enclosures. The data is transmitted to computers via wireless connections.

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