• Transmit and receive radio frequency technology used to electrically couple through passing antennas
• Transmitter induces electrical current in a good loop that the receiver detects
• PLC tracks loop signal according to loop plan
• If a longitudinal belt rip occurs, sensor loop is also ripped
• Transmitter induces electrical current in ripped loop, loop does not transmit signal, and receiver does not detect signal
• PLC misses signal in loop plan and alarms or stops conveyor

This system has proven itself globally in just about every mining or industrial application that exists! This system is an inductive-based technology that monitors the integrity of conductive loop antennas that are embedded in fabric or steel cord conveyor belts at regular intervals. When a longitudinal rip occurs, the loop fails to conduct the induced current and the system generates a rip alarm when the antenna passes the system’s detector heads. This system has been around for many decades, but it has been continually improved with the latest technologies, including RFID technology and digital signal processing technologies.

Installation

Majority of longitudinal belt rips occur near material loading 

Second monitoring point after take-up possible

Belt movement is monitored using a proximity sensor & targets on a system pulley

Loop separation is monitored by the number of targets detected between loop detections