Signal to noise ratio improvement for rip detectors

摘要

The frequency of the AC signal used to detect the integrity or lack of same in a conveyor belt is reduced to be in the 25 KHz. to about less than 200 KHz. and most preferably in the 50 KHz. to 100 KHz. frequency range. When such AC signals are capacitively coupled to antennas carried by a conveyor belt past a rip detector station, the ratio of the magnitude of such signal relative to that of the cross coupled noise, in particular, and other electrical noise in general is significantly increased. The invention relates to an apparatus and method in which signals in such frequency range are used.