Digital Twin – Modeling Interrelated Devices
P ROPOSED R EPRESENTATION O F T HE P UMP S TATION
The Pump station Device is the sum (and more) of the Tank and Pump devices. For our
discussion, we propose the following representation of the Pump station.
Figure 5 Pump Station JSON Digital Twin model
By using the unique identifiers of each child twin, we inserted “child twins” linking the
corresponding tank and pump devices. This clearly models the physical relationships between
these 3 devices. The Pump station representation is linked to any static or dynamic properties of
the child devices and, conversely, the pump station device manages the commands to each child
twin.
The above is the first basic step to model the complexity of the physical world through a digital
twin representation. Next, we want to expand the model by adding “logical rules” that
encompass the child twins. An example of this is shown in Figure 6.
- 90 -
March 2018