DEVELOPMENT AND VALIDATION OF WIRELESS STRAIN SENSOR NETWORK

This paper presents a wireless strain sensor network (WSSN) design for monitoring structural dynamic strain field. A precision strain sensor board is developed and integrated with the IRIS mote hardware/software platform for multi-channel strain gauge signal conditioning and wireless monitoring. Further, to verify the functionality of the designed wireless strain sensor for dynamic strain monitoring, a cluster-star network evaluation system is developed for strain modal test on an experimental steel truss structure. Test results show very good agreement with the results of finite element (FE) simulations. This paper demonstrates the feasibility of the proposed WSSN for large structural dynamic strain monitoring.