CONVEYER BELTS

摘要

The invention provides a method of detecting the occurrence of an undesired conveyer belt condition. The method includes modifying the response to an interrogation signal of at least one passive radio frequency identification (RFID) transponder or tag (12), moving with the conveyer belt (16), by means of a passive conveyer belt condition sensor (14) in response to the occurrence of an undesired conveyer belt condition, and monitoring the response, if any, of the at least one passive RFID transponder (12) to the interrogation signal, thereby determining if the undesired conveyer belt condition has occurred.