Alarm system

A method for triggering an alarm signal by means of an alarm system comprised of at least one portable unit having a size not greater than a mobile telephone and intended to be placed in an environment, each portable unit comprising a sensor system that records a sound/vibration image of a normal state of the environment in which the at least one portable unit is placed while the portable unit is in the environment, the sensor system comprising an accelerometer/silicon crystal, microphone and temperature sensor, the accelerometer being triaxial, a processor member connected to the sensor system that compares signals received from the sensor system and a recorded predetermined environment-dependent reference, a communication member of a unique identity connected to the processor member and adapted for wireless communication at least upon the triggering of an alarm signal, and a positioning member connected to the processor member and adapted to indicate, at least upon the triggering of an alarm signal, the position of said unit, a memory member connected to the processor member via a distributed computer network, and for dynamic and interactive update and development for different purposes by maneuvering via fixed and/or mobile telephony and/or radio and/or computer unit, the method comprising the steps of:

• by means of the sensor system, detecting different states comprising vibrations, relative position changes, accelerations and temperature, wherein said accelerations are detected against three axes;
• comparing the signals received from the sensor system and the at least one environment-dependent reference predetermined for a specific environment and stored in the memory member, the predetermined environment-dependent reference being at least a sound/vibration image of the recorded normal state of the environment in which the at least one portable unit is placed;
• upon deviation of signals received from the sensor system from said environment-dependent reference, triggering an alarm signal;
• and
• according to instantaneous control or predetermined configuration, by means of the communication member of a unique identity, transmitting a message to at least one receiver;
• and
• according to instantaneous control or predetermined configuration, by means of the positioning member, determining the position of the unit;
• transmitting the position to the at least one receiver;
• and
• dynamically and interactively updating and developing said memory member for different purposes by maneuvering via fixed and/or mobile telephony and/or radio and/or computer unit.