Preliminary Study on the Quality of Distributed Calibration Procedures for WSN

Nowadays, Wireless Sensor Networks are being used more and more widely. These are used to monitor various parameters, providing spatial and temporal information that cannot be obtained by using a single sensor node. Given the complexity of measurement, it is difficult to perform a spatially and temporally accurate calibration. One of the most widely used solutions is to include in WSNs some reference sensors with excellent metrological performance, which, however, has as its downside a high cost. The distributed calibration procedure, on the other hand, is based on periodic recalibration of sensor nodes with a single reference sensor. This paper will present a preliminary study on the inaccuracies and sources of uncertainty of this method and possible strategies for improving the quality of this technique by optimizing the placement of the reference sensor and the measurement time for calibration.