A passive micro strain gauge with a mechanical amplifier has been designed, analyzed, and tested. The mechanical amplifier provides a high gain such that residual strain in thin films can be directly measured under an optical microscope. This strain gauge can be in situ fabricated with active micro sensors or actuators for monitoring residual strain effects, and both tensile and compressive res...

The precision error of the Brillouin optical time domain reflectometry (BOTDR)-based distributed fiber optic strain measurement is normally evaluated based on change from initial zero state. In many structural health monitoring applications, however, there caused by installation process a sensor cable to structure. Engineers are interested in incremental profile assess performance often not con...

This paper reports on a sensor for monitoring bone plate strain in real time. The detected bone plate strain could be used for judging the healing state of fractures in patients. The sensor consists of a magnetoelastic material, which can be wirelessly connected and passively embedded. In order to verify the effectiveness of the sensor, a tibia-bone plate-screw (TBS) model was established using...

Monitoring of the static response of bridges under service and environmental loading has been recently considered a valid alternative to the more classical methods based on the measurements of the dynamic response and subsequent dynamic system identification. The paper starts reviewing and comparing some of the most common data processing techniques used both in dynamic and in the static monito...