Patent ID: 8346501
Filing Date: 2013-01-01
Classification: D21F,D21G,G01L

Abstract:
1. An industrial roll, comprising: a substantially cylindrical metallic core having an outer surface; a polymeric cover circumferentially overlying the core outer surface; and a sensing system comprising: wherein the plurality of sensors are arranged at a substantially equal radial distance from the core outer surface, such that they define a circle when viewed from an end of the roll; and wherein each of the non-tracking sensors is further arranged at a substantially equal first angular distance from its immediate non-tracking sensor neighbors, two endmost non-tracking sensors defining an angular gap; wherein the tracking sensor is disposed in the angular gap, such that a second angular distance defined by the tracking sensor and either of the endmost sensors differs from the first angular distance; wherein the sensing system is configured to differentiate between the tracking sensor and the non-tracking sensor signals when one of the non-tracking sensors fails as the roll rotates.