| 摘要 |
<p>A method of and apparatus for tracking data associated with a load being conveyed on a belt conveyor (12) between a source station (16) including a source station load sensor (18) and a destination station (20) including a destination station load sensor (22) includes the steps of: generating a data record for the load at the source station, loading the data record into a programmable controller (C) for controlling the conveyor, generating a pulse signal having a number of pulses directly proportional to the travel of the belt conveyor (12), establishing an expectation window indicating expected arrival of the load at the destination station (20), establishing a distance field for the load using the smaller of the distance between the load and any preceding load on the belt conveyor (12) or the distance between the source and destination load sensor (22), sensing the leading edge of the load by the destination station load sensor (22), comparing the distance between the source and destination load sensors (18, 22) and detecting any slippage of the load on the belt (12) and updating the data record in the controller (C) based on the detected load slippage to coincide with the actual position of the load on the conveyor (12) at the destination station (20).</p> |
