HOW DOES THE DATA END UP IN THE DATABASE?
The sensors are connected via Bluetooth (BLE: Bluetooth Low Energy) to nodes, that are small transmitters / receivers that are incorporated in the emergency lighting fixtures. These nodes in the emergency lighting fixtures are continuously connected to each other and thus form a network. With us that is a mesh network. The nodes transfer the data from the sensors to the next node, towards the gateway. The gateway has a 4G connection with our database in the cloud. In the unlikely event that a node does not work, the network itself will look for a different route towards the gateway (= self healing).
WHAT DOES MESH MEAN EXACTLY?
A "mesh" network means that the data coming from the sensors is transferred to the gateway via a random connection. The sensors connect to the nearest node (sometimes also multiple nodes). Via the nodes, the data is transported via a random path to the gateway and from there to the database.
WHAT DOES SELF HEALING MEAN ACTUALLY?
The sensor data is sent via Bluetooth to the nearest node. As soon as the data is picked up by a node, the data is transported via the node network in the emergency lighting fixtures with a random path to the gateway and from there to the database. In the unlikely event that a node is not active, the data will find its way to the gateway via an alternative route. The fact that the system itself searches for an alternative route, we call “self healing”.
WHAT DO YOU MEAN BY A ‘HEARTBEAT’?
The sensors are set in such a way that they report their status on a regular basis. We call that the "heartbeat". This tells us that the sensors are still active and will function when something is really going on. In the unlikely event that something is wrong (for example: movement has been detected or the lamp of the emergency lighting becomes defective), the sensors immediately send their data and a notification is created immediately. Depending on the severity of the report, this is a notification or an alert.
WHAT IS THE ADVANTAGE OF THE NETWORK BASED ON THE EMERGENCY FIXTURES?
An emergency lighting network is a very dense network within a building (or factory), which greatly benefits the connectivity with the sensors. Emergency lighting fixtures are projected according to a spacing table. The escape route must be illuminated at least with 1 lux, in 99 out of 100 cases this means that luminaires are installed within 30 meters of each other. The luminaires thus form a very dense data network. An additional advantage: the emergency lighting fixtures are all equipped with a battery that continues to work for at least 1 hour in the event of a calamity, so that our network remains the only one active in the event of a power failure.
WHAT DOES THE GATEWAY DO IN THIS SYSTEM?
The gateway is a kind of router that connects to the internet. The gateway has a 4G connection to the internet. We have opted for a 4G connection because it is the most stable. In addition, we do not use company-specific IT systems, which makes our network completely autonomous. Incidentally, it is an option to use the customer's WiFi or Ethernet network, but that is not our preference.
WHAT IS MEANT BY A FULLY AUTONOMOUS NETWORK?
The entire system that we have built: the sensors that monitor the safety equipment, and the network through which the data is transported, is completely separate from all your IT networks. That makes our network completely autonomous. We do not use your WiFi or Ethernet network, unless you request it.
WHAT TECHNOLOGY IS USED?
We use BLE (Bluetooth Low Energy) to connect to the nodes. We use a mesh network that is connected to each other via 2.4 Ghz. The gateway connects to the internet via 4G.
DOES SAVAL ALSO HAVE CENTRAL EMERGENCY LIGHTING FIXTURES WITH BUILT-IN NODES?
For the time being, we are using nodes that have been incorporated into a decentralized emergency lighting fixture. Ultimately, it is about providing a comprehensive network so that connectivity with the sensors is guaranteed. If it turns out that we also have to use central emergency lighting fixtures, then we will certainly do so. But we have not yet developed the option “nodes in central emergency lighting”.
DOES THE CONNECTION OF THE SENSORS ALSO SAY SOMETHING ABOUT THE CONTENTS OF THE FIRE EXTINGUISHER? FOR EXAMPLE THE PRESSURE OR FILLING
The sensors provide insight into the status of your fire extinguisher. This also includes the content (or weight) so that you can be sure that the extinguisher is 100% usable at the time of a fire or calamity. The connection with the network is important, so that the data from the sensors reaches our database. But this connection says nothing about the content of the data (read: the data that says something about the status of the extinguishing agent).
CAN YOU ALSO CHOOSE TO ONLY MONITOR EXTINGUISHERS?
Safety Connect is always sold in combination with the new emergency lighting fixtures from Saval: the Advance series. Because the emergency lighting fixtures transport all sensor data, first to the gateway and then to the central database. This means that the emergency lighting fixtures are the basis of the complete Safety Connect program. Without emergency lighting fixtures, there is no Safety Connect.
BUT I ALREADY HAVE EMERGENCY LIGHTING EVERYWHERE.
Well, unfortunately it is not possible to start using Safety Connect yet. Retrofitting of existing emergency lighting is not possible.