Patent ID: 8050881

Claim:
A method for post data-collection synchronization of data of at least one sensor unit in a distributed sensor system, comprising: (a) reading an initial local-clock time of a sensor unit, having a local clock, by a data processor before a data-collection session; (b) reading an initial reference local-clock time of said data processor, having a reference local clock, by said data processor before the data-collection session; (c) reading a final local-clock time of said sensor unit by said data processor after the data-collection session; (d) reading a final reference local-clock time of said data processor by said data processor after the data-collection session; (e) computing a time-scaling factor by said data processor as the ratio of the difference between the final and initial reference local-clock times and the difference between the final and initial local-clock times; (f) converting at least two local-clock sampling times of said sensor unit's collected data from the data-collection session by said data processor to their corresponding reference local-clock sampling times using the time-scaling factor; and (g) interpolating said sensor unit's collected data from the data-collection session by said data processor to approximate a data value of said sensor unit at a reference local-clock time between said reference local-clock sampling times.