The Sismalarm Network is formed by a collection of Sismalarm devices distributed in geographic areas, connected through the Internet to a centralized server called SismAlarm Central Server. This allows us to know in real-time what is going on in the environment.
In case of an earthquake the Sismalarm devices that are near the epicenter will detect the propagation of the P-wave. Every device that has completed the detection will send a message to the SismAlarm Central Server. The message consists of multiple packets that contain information like the PGA, STA/LTA, the absolute time of the event and other device specific identification parameters.
The power supply is a crucial part of the device, even a small electric noise may cause a spike of accelerometer’s voltage levels and thus cause an error of reading non-negligible, in the order of magnitude of a few mg.
For this reason we have used three low-noise linear voltage regulators, this allows us to have a power supply that is perfectly immune to noise. SismAlarm also includes a backup battery, this would allow you to communicate with the central server even in the absence of electricity.
The devices communicate with a central server, the communication is bilateral and with a custom communication protocol. This allows us to have more control over what’s going on and to control the devices remotely. The decisions are not taken from single devices but the central server decides if and when to send alarms or false alarms messages.
DATA AND SECURITY
The devices communicate with a server where each one has to be authenticated. We are also able to see the history of every device and analyze the data regarding past events, behaviors and statistics.
MADE IN ITALY
Guardian is also a laboratory in scientific research and in new TLC technologies that works in collaboration with several research centers and universities. Sismalarm has been designed, developed and industrialized within Guardian laboratories starting from know-how and skills acquired in the field of environmental monitoring.
TEST in Università di Brescia
TEST in Università del Chile
TEST laboratori OGS a Udine