METHOD AND DEVICE FOR ANALYSIS OF METAL OBJECTS TAKING INTO ACCOUNT CHANGE OF PROPERTIES OF CONVEYOR BELT

摘要

1. A method for analyzing objects (3) depending on their electromagnetic properties, the method comprising the steps of: transporting (S13) the analyzed objects (3) on a conveyor belt (1); scanning (S14) the electromagnetic properties of objects (3) and a conveyor belt ( 1) using an electromagnetic sensor (9), and the electromagnetic properties of the conveyor belt (1) depend on metal contaminants (19) that are stuck in the conveyor belt (1); generating (S12, S17) data on the properties of the belt characterizing the electromagnetic properties of the conveyor ribbons (1), iana lysis (S18) of objects in accordance with scanned electromagnetic properties and data on the properties of the tape. 2. The method according to claim 1, further comprising the step of storing the generated data about the properties of the tape in the database. The method of claim 1, wherein the analysis step is a step of classifying objects (3). 4. The method according to claim 3, where objects (3) are sorted according to their classification into non-metals and metals, or sorted into non-metals and various types of metals, or sorted into different types of metals. The method according to claim 1, wherein the data on the properties of the belt is generated using a training process in which data on the properties of the belt is determined by comparing the current scanned electromagnetic properties with the scanned electromagnetic properties of one or more previous conveyor belt transportation cycles (1) .6. The method according to claim 1, wherein the data on the properties of the tape is generated by adapting (S17) the data on the properties of the tape by comparing (S15) the electromagnetic properties detected in a specific section of the electromagnetic sensor (9) in the current transportation cycle at a specific cycle time, with the electromagnetic properties of same plot in