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This work demonstrates a condition-based solution for monitoring the long-term health of a system with moving or rotating parts. This is accomplished through the direct measurement of loads appearing on the structure by means of a synchronized network of wireless sensors. The wireless sensors exhibit extremely low power requirements, allowing high sampling rates while sustaining battery life entirely...
This work demonstrates the use of wireless sensor nodes to monitor time- and frequency-selective channel fading in the 2.4 GHz ISM band. Four distinct channel conditions are considered: (1) a static node experiencing little to no fade, (2) a static node experiencing severe, frequency-selective fading, (3) a static node, in a dynamic environment and (4) a moving node in a highly multipath environment...
This work presents several channel allocation strategies that utilize in situ fading measurements obtained from node RSSI data. The strategies take advantage of current frequency agile radio designs and consider both single and multiple frequency allocations along with nodal connectivity requirements. The techniques are demonstrated on real-world data for an in-vehicle wireless sensor application...
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