A novel wireless sensing unit for real-time structural response measurements has been designed and fabricated. Using available technologies from the marketplace, a low cost alternative to traditional wire-based sensing systems has been developed. In particular, wireless communication capabilities are included through the integration of reliable wireless modems with each unit. A wireless infrastructure lowers overall system installation costs by eliminating laborious cabling tasks. For sensor control and data interrogation, a RISC microprocessor computational core is used. As a result, the computational burden of the centralized data logger is placed on the individual sensing units. A wide array of different sensors can be interfaced to the unit delivering a sensor transparent module. As a means of system validation, a small-scale two-story model structure is instrumented and excited with modal analysis performed on the time history response.
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