| 摘要 |
A conveyor system has a conveyor track having at least one pathway, a number of undercarriage units for travel along the conveyor track, each with a plurality of travel elements confined for travel along the pathway, the conveyor track having at least one sensing location, at least o ne sensing portion for each sensing location the detecting the presence of a travel element et the sensi ng location, a monitoring portion for monitoring an operative frequency at which successive travel elements pa ss the sensing location, a signalling portion responsive to the monitoring portion for issuing a signal on a change in the operative frequency indicative of a corresponding change is the condition of one or mo re than one affected travel element, the conveyor track including art access site for accessing the affected travel element, and a drive portion for driving the undercarriage units along the conveyor, the drive portion being responsive to the monitoring portion for bringing the conveyor to a temporary halt with the affected travel element at the access site for subsequent replacement and/or repair.
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