CIRCULATING BELT OR FABRIC USED TO LOOP FOR CONTROLLING PROCESS

PURPOSE: A circulating belt or a fabric is provided to improve the defect worn or frayed the edge of a belt by the physical contact between a paddle and the belt, and used to a loop for controlling a process. CONSTITUTION: A belt is equipped with a device for emitting an electromagnetic radiation by an energy resource and a sensor to emit the electromagnetic radiation by the same energy resource with an outer supplying resource located toward the belt. The sensor contains a compound of electromagnetic radiation dispersed inside a matrix and contains a diffusing material. The sensor is taken a filamentary material mixed on the belt or inside the belt, and a coating or a film shape. When the sensor is operated, the energy emitted from the energy resource faces to the belt. When the sensor is excited by the energy, the sensor emits the electromagnetic radiation, and the electromagnetic radiation is detected by a near detector. An operator of the machinery obtains a useful information about the operation of belt and the condition under the operation based on the peak wave length and the strength of the electromagnetic radiation emitted from the sensor.