User's Manual

User Guide

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User Guide, WherePort IV D1300 REV A

8.2. Area Coverage

There may, however, be many areas where different activities occur that must be monitored. Well

positioned WherePort IVs can define these areas of interest by pinging tagged assets as they enter them.

Examples are assembly stations in a factory, loading docks, or different types of rooms in a hospital. One

or more WherePort IVs mounted at the station will ping a tag whenever the tag enters the area. If more

than one port is placed in a large area, they must all have the same ID.

The WherePort IV can be particularly important if the structure of the facility obstructs the line of sight

visibility to location sensors or location antennas. The garages in a repair facility may have metal walls.

Multiple sensors, likely four, would need to be mounted around the bay to guarantee a signal that locates

a vehicle in the bay.

When more areas are to be monitored, more issues must be considered in planning the location of the

WherePort IVs.

• What will the orientation of the tag be as it moves through the area?

• Will tags be pinged while they are moving past but not through the area?

• Are there sources of interference that may restrict the capture area?

• Will WherePort IVs be close enough to each other that their fields may overlap?

8.3. Portals

An additional complexity may arise if the best way to monitor assets is to detect when an asset enters or

leaves the area through a door, gate, or similar portal. WherePort IVs mounted at the portals of these

areas will ping a tag, indicating that the tagged asset has passed through and is not in the area.