Data processing: measuring – calibrating – or testing – Calibration or correction system – Timing
Reexamination Certificate
2008-10-01
2011-11-01
Kundu, Sujoy (Department: 2857)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Timing
C702S187000, C702S188000, C370S503000, C370S507000, C370S510000, C370S512000, C375S354000, C375S356000, C375S359000, C375S362000
Reexamination Certificate
active
08050881
ABSTRACT:
A system for synchronizing data after they are collected and stored locally in sensor units in a distributed sensor system, so that wired or wireless communication is not required during a data-collection session. Each sensor unit has a local clock providing local-clock times before and after a data-collection session, and a data processor uses its local clock or a sensor unit's local clock as the reference to compute each sensor unit's time-scaling factor, which is the ratio of the elapsed reference local-clock time and the elapsed local-clock time. The data processor uses the time-scaling factor to convert each sensor unit's local-clock data-sampling times to the reference local-clock data-sampling times, and the data processor subsequently interpolates sensor data to approximate simultaneous sensor-data values at desired reference local-clock times. A physical-activity monitoring system can use this synchronization method to reduce the size, power consumption, and cost of the sensor units.
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Yeung King-Wah Walter
Yeung Wei-Wei Vivian
Enbiomedic
Kundu Sujoy
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