| 摘要 |
A system for monitoring a conveyor belt having magnetically permeable cords, has an AC magnetic field generator for generating an alternating magnetic field to magnetize the cords, in use; a magnetic field sensing unit for sensing the alternating magnetic field provided, in use, by the cords and for providing signals representative of the alternating magnetic field; arid a processor for processing the signals to monitor continuous parts of the cords. The system further has a DC magnetic field generator (14) for erasing an AC field previously generated by the AC magnetic field generator (is), the AC magnetic field generator being positioned between the DC magnetic field generator and the magnetic field sensing unit (16). The processor also determines the speed of travel of the belt, and the position in space of a lateral edge of the belt. |
