| 摘要 |
PCT No. PCT/CH89/00186 Sec. 371 Date Jul. 11, 1990 Sec. 102(e) Date Jul. 11, 1990 PCT Filed Oct. 30, 1989 PCT Pub. No. WO90/86607 PCT Pub. Date Jun. 14, 1990.A monitoring device is provided for at least one current pickup of a conveyor truck in a conveyor system running on tracks, whereby when viewed in a direction of travel the current pickup has a profile configuration which changes through wear as the pickup traverses a live rail. The device comprises a receiver for a test signal fixedly mounted on one side of the live rail, a transmitter mounted on the other side of the live rail, a test signal evaluating device that responds to a modified profile configuration of the current pickup resulting from wear, and an alarm signal triggered at a predetermined level of wear of the current pickup. |
