Patent ID: 9157184
Filing Date: 2015-10-13
Classification: B30B,D21F,D21G

Abstract:
1. A method of determining a rotative position of an industrial roll, comprising the steps of: (a) providing a rotating industrial roll having a longitudinal axis, the industrial roll having mounted on one end thereof an accelerometer; (b) detecting a gravity vector generated in the accelerometer; (c) comparing a magnitude and direction of the gravity vector detected in step (b) to a predetermined pre-trigger gravity vector; (d) if an absolute value of the gravity vector detected in (b) has not reached an absolute value of the pre-trigger gravity vector, repeating steps (b) and (c); otherwise, proceeding to step (e); (e) detecting the gravity vector generated in the accelerometer; (f) comparing the magnitude and direction of the gravity vector detected in (e) to a predetermined trigger gravity vector, the absolute value of the magnitude of the trigger gravity vector differing from the absolute value of the magnitude of the pre-trigger gravity vector by an amount greater than a typical noise signal generated by the accelerometer; (g) if the absolute value of the magnitude of the gravity vector detected in step (f) reaches the absolute value of the magnitude of the trigger gravity vector, repeating steps (e) and (f); otherwise, proceeding to step (h); and (h) determining the rotative position of the roll based on the gravity vector detected in step (e).