Abstract: A method of determining the angular position of a roll includes: (a) detecting signals generated by an accelerometer attached to an end of a rotating roll; (b) determining whether a signal generated in step (a) has reached a pre-trigger threshold, and repeating step (a) if the signal has not reached the pre-trigger threshold; (c) if the signal is determined in step (b) to have reached the pre-trigger threshold, detecting a subsequent signal generated by the accelerometer; (d) determining whether the signal detected in step (c) has reached a trigger threshold, and repeating step (c) if the signal has not reached the trigger threshold; and (e) if the signal has reached the trigger threshold, establishing the angular position of the roll based on the signal that has reached the trigger threshold.

Abstract: A method of determining a rotative position of an industrial roll includes: (a) providing a rotating industrial roll having a longitudinal axis, the industrial roll having mounted on one end thereof an accelerometer, the industrial roll further including a plurality of sensors; (b) determining a pre-trigger angular position of the roll based on a first gravity vector provided by the accelerometer; then (c) determining a trigger angular position of the roll based on a second gravity vector provided by the accelerometer, the magnitude of the second gravity vector differing from the magnitude of the first gravity vector by more than the magnitude of a typical noise signal; and (d) gathering data from the sensors after the roll has passed the trigger angular position; and (e) matching the data gathered in step (d) with a respective sensor of the plurality of sensors based on the determination of the trigger angular position.

Abstract: A method of determining the rotative position of an industrial roll includes: (a) providing a rotating industrial roll having a longitudinal axis, the industrial roll having mounted on one end thereof an accelerometer, the industrial roll further including a plurality of sensors; (b) determining a pre-trigger angular position of the roll based on a first gravity vector provided by the accelerometer; then (c) determining a trigger angular position of the roll based on a second gravity vector provided by the accelerometer, the magnitude of the second gravity vector differing from the magnitude of the first gravity vector by more than the magnitude of a typical noise signal; and (d) gathering data from the sensors after the roll has passed the trigger angular position; and (e) matching the data gathered in step (d) with a respective sensor of the plurality of sensors based on the determination of the trigger angular position.