Integrator, mostly energy sites. A customer wants lone-worker monitoring for technicians inside a substation building: where is each person, SOS button, man-down, and an alarm when someone enters the switchgear room without a permit. Their words were «absolute positioning and geofences». GPS is useless in there, it’s a concrete box.
I assumed Hermetry Safe was the product for this, but I can’t find a doc page on what it does. What are people using for indoor positioning, and what can I build in Hermetry today?
What accuracy do they really need? Metre-level or room-level? That decides the whole hardware budget.
When I pushed them: room-level. Six rooms, two corridors. They want to know «Dave is in switchgear room 2» and get an alarm on falls, SOS and the forbidden room.
We did ours with the Personnel tracking ready solution, didn’t need Safe for room-level.
UWB anchors give you decimetres but cost a lot per room and need calibration. For room-level, BLE is plenty.
Megan’s right. The Personnel tracking page calls Hermetry Safe the dedicated worker-safety product but doesn’t say what it does, so I wouldn’t promise anything from it. The Personnel tracking ready solution is what I’d use, and room-level is exactly what it’s built for. I set it up for a pumping station last year.
The way zones work decides your hardware. Hermetry does not work out zones from positions or radio signals, and it has no geofence polygons. The tracker, or the gateway that hears it, decides which zone the person is in and sends the zone name in the key zone. So the zone logic lives in your hardware: a small BLE transmitter fixed in each room, the worker’s tracker reports the strongest one it hears, and the tracker or the gateway maps that to a zone name like switchgear-2.
The solution’s tracker profile then gives you the rest:
keys: lat, lng, zone, event, battery, air_temp, light
event: normal | motion | fall | motionless | sos | press_once
alarms: fall, motionless, sos (Critical), help_call,
forbidden_zone (zone == the tracker's forbiddenZone attribute),
battery_low, device_offline (15 min)The event words must be exactly those, lower case. If your tracker sends something like FALL, translate it in the profile’s root flow. Each tracker gets a server attribute forbiddenZone with one room name, so set it to the switchgear room for everyone without a permit. Only one forbidden zone per tracker out of the box, a second needs an extra rule.
For the map, use the Map card in image mode with the building’s floor plan, positions in pixels. Full description: Personnel tracking.
That’s a real plan, thanks. Ordered trackers that report the strongest BLE transmitter, did the room mapping in the gateway, installed the solution in a test org. Walked into the «switchgear» (my office) with forbiddenZone set and got the Critical alarm in a few seconds. Customer accepted room-level once they saw it on the floor plan. The permit handling we’ll do by changing forbiddenZone through the API when a permit is issued.
Room-level was the right call. Metre-level indoor positioning tends to sound good in a meeting and then becomes a maintenance job nobody wants.
- Debes estar registrado para responder a este debate.
Únete a la conversación
Inicia sesión para preguntar y responder, dar me gusta a las publicaciones útiles y marcar la respuesta que resolvió tu problema. Cada aportación suma puntos y niveles.