Automatic movement detection

Automatic movement detection in Composition Tracking automatically detects the movement events between tanks using the realtime tank inventory data. For example, the graph below shows how to detect the time and quantity of movement events from the realtime trend of tank inventory data.

Enable automatic detection

For automatic movement detection to work, you must enable the Event Detection from Tank Inventory checkbox on the Tracking tab of the Options dialog box.

Movement data is automatically detected from realtime tank inventory data.

Figure: Generation of movement from inventory change

The following figure shows movement data automatically generated from 10 minute interval inventory trends of each of the tanks in the display. This example illustrates how the movement data ends up fully representing all real movements that took place.

Figure: User display showing automatically detected movements

After automatic movement detection, AVEVA Production Accounting CT automatically detects the movement between tanks as well as receipt and feed movements to the processing unit. The blue line in the right diagram is the movement line which AVEVA Production Accounting CT automatically detected from the 10 minute interval inventory data of each tank. These detected movements equal exactly what could be manually derived by analyzing inventory change and equal almost exactly what would have been metered had metered data been available. The user is spared the effort of manually entering the movement data, which also eliminates the possibility of movement logging errors.

Interaction between movement tracking system and inventory change

If AVEVA Production Accounting receives both tank level data from realtime tags as well as movement data from a tank movement tracking system, then normally the tracking system will report a movement for the same approximate time period and of the same approximate size as the movement calculated from the inventory change.

If AVEVA Production AccountingDR notices that there are two such sets of movement data from different sources and they overlap in time, AVEVA Production Accounting DR will use only the tank inventory change and construct one event (not two).