| 摘要 |
Conveyor systems are disclosed including a chain conveyor for carrying a predetermined load, a frame for the chain conveyor, a track, wheels for supporting the frame for movement along the track from a predetermined reference position, the chain conveyor being movably supported on the frame for movement from the predetermined reference position, and sensors for detecting the position of the conveyor along the track with respect to the first predetermined reference position without direct contact, or for detecting the position of the chain conveyor with respect to the second predetermined reference position without direct contact, the sensors delivering a train of pulses corresponding to a predetermined distance of movement of the conveyor along the track or of movement of the chain conveyor with respect to the frame, whereby the position of the conveyor along the track or of the chain carrier can be determined. |
