Ready-mix plants all over southern California rely on a steady supply of crushed rocks to make their product. A nearby quarry meets that demand by extracting rocks and stones from an open pit mine, crushing them, and distributing them to their customers. Processing these rocks to get them to the right size requires moving them to different processes, and this is done along conveyor belts.
To control the flow of materials, operators need to know just how much rock is moving along these conveyor belts. However, getting this measurement can be a challenge for a number of reasons, including excessive vibrations, rocks damaging equipment, and varying belt tensions. The most common answer to achieving this measurement has been load cells, which weigh the rock as it moves along a section of the conveyor belt.
The quarry in southern California had been using load cells, but the maintenance and recalibrations were constant. Plus, the load cells weren’t able to deliver the measurement data to their control system at the operations center. The quarry wanted a better solution – one with less maintenance, fewer calibrations, and a sensor that could deliver the information they need to their control systems.