A great example of modern ultrasonic level measurement in action is the ship loading station at Imerys Quarries site at Fowey, Cornwall undertaken by Pulsar Process Measurement. The driers produce clay in a granular form with a high dust content. From the driers, trucks transport the clay into a 30 tonne hopper. This then feeds onto a conveyor and out onto the waiting ship. To minimise dust, the hopper is enclosed, and there is a need for a traffic light that tells the truck driver when the hopper is ready to accept the next load.
The Pulsar unit measures the level of clay, and provides a relay closure when the level of clay is low enough to accept the next load. The complicating factor, as can be seen from the photograph, is that the vehicle loads through a heavy grid. The level of the clay will sometimes be above the level of the grid and other times below, so the ultrasonic unit must be capable of tracking the level through the grid without losing it. This will inevitably mean that the grid itself will provide the largest echo. Added to this is a high dust level in the air, so to be successful, as the Pulsar unit has been for several months, the DATEM software in the Pulsar system has to offer superb echo discrimination. Up until the last few years this sort of application would have been unachievable using ultrasonic (or any other sort of) continuous level measurement.
Ultrasonic Level Control at Imerys Shiploading Station
Imerys Case Study
A great example of modern ultrasonic level measurement in action is the ship loading station at Imerys Quarries site at Fowey, Cornwall undertaken by Pulsar Process Measurement. The driers produce clay in a granular form with a high dust content. From the driers, trucks transport the clay into a 30 tonne hopper. This then feeds onto a conveyor and out onto the waiting ship. To minimise dust, the hopper is enclosed, and there is a need for a traffic light that tells the truck driver when the hopper is ready to accept the next load.
The Pulsar unit measures the level of clay, and provides a relay closure when the level of clay is low enough to accept the next load. The complicating factor, as can be seen from the photograph, is that the vehicle loads through a heavy grid. The level of the clay will sometimes be above the level of the grid and other times below, so the ultrasonic unit must be capable of tracking the level through the grid without losing it. This will inevitably mean that the grid itself will provide the largest echo. Added to this is a high dust level in the air, so to be successful, as the Pulsar unit has been for several months, the DATEM software in the Pulsar system has to offer superb echo discrimination. Up until the last few years this sort of application would have been unachievable using ultrasonic (or any other sort of) continuous level measurement.
For more information, please contact:
Pulsar Process Measurement
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Photo:
Imerys unloading system
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