How an Asset Tag Finds Its Position

An asset tag sends a short Bluetooth signal. Gateways already installed on site pick it up. The system then compares the results from three or more gateways and estimates where the tag is. This method is generally called triangulation.

The tracker is a small battery-powered device fitted to a pallet, trolley, or piece of equipment. At set intervals it broadcasts a brief identity message. It does not need to scan the room or carry a heavy positioning chip. The calculation is done at the receivers and in the software.

One gateway can only show that the tracker is nearby; it cannot pinpoint a bay. Two give a rough range. Three or more are needed before the result can fall on a usable point. Each gateway records signal strength, or how the signal arrived. Stronger, clearer readings usually mean a shorter path. The platform converts these readings into distances or angles, then finds the position that best fits all points. Marked on the floor plan, that is where the tag is.

Radio does not travel in a straight line like a ruler. Walls, racking, and goods bend and weaken the signal, so the same tag may sit slightly off after a row of pallets is moved. How the gateways are placed often matters more than promising pin-point accuracy. Cover the aisles you actually care about, and make sure goods on the move can be heard by at least three receivers. After the layout changes, calibrate again.

This position answers a floor question: which zone was the asset in when it last transmitted? A nurse can find an infusion pump. A warehouse can see which aisle a cage entered. A shop can tell whether a trolley is still in the back room. Updates follow the tag’s broadcast interval, not a person walking the floor.

This is indoor radio, not outdoor satellite navigation. It suits zones and “last seen where.” Promising centimetre accuracy inside a steel rack is not appropriate. For a tighter range, add receivers, tidy the map, and accept that metal will still shift the estimate.

If you are considering indoor tracking, tell our team the layout of the floor, which zones matter, and how precise the location needs to be. We will recommend a suitable plan, along with the right gateway and asset trackers.