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[...] 1, considering a prototype system composed by four Sensing Nodes. Each Sensing Node is composed by a TelosB WSN platform with a signal acquisition board (SAB) attached to a MEMS acceleration sensor. All four Sensing Nodes communicate with a Coordinator Node (also a TelosB WSN platform) via a standard communication protocol (IEEE 802.15.4). The Coordinator Node supervises the network and nodes activities (e.g. node configuration, start/stop sampling) and guarantees a tight synchronization between all nodes; it also forwards the configuration [...]
[...] below 5 mg) and ambient noise tests (vibrations with amplitudes below 1.5 mg). The Welch Spectrums link of the time series records were calculated [...]