Patent ID: 11885868
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC B  G | IPC G

Claim 9:
10. A method of monitoring a pallet system having a housing in which a plurality of pallets each has a pallet bed with a horizontally extending face to carry objects placed thereon, the housing including a first track and a second track positioned above the first track, with at least one of the plurality of pallets being movably carried on each track into and out of a processing system, the housing having an opening in which the horizontally extending faces of the pallet beds are selectively exposed therethrough, the method comprising:
providing a first emitter proximate to the opening of the housing;
providing a first detector proximate to the opening of the housing;
projecting a first beam from said first emitter to said first detector, wherein said first beam extends above and in a direction that is parallel to the movement of the pallets; and
detecting whether said first projected beam has been interrupted.