Abrégé

A monitoring device is provided that is used for the monitoring of an area of building or land, including an optical strand used as a sensor, one optical source for emitting an optical emission signal transmitted in the optical strand, and one optical analogue detector for detecting an intensity of an optical return signal corresponding to the optical emission signal returning from the optical strand. The monitoring device is arranged as a compact unit and includes a controller for alternately activating and deactivating the emission of the optical source so that a ratio between the non-emission duration and the emission duration is greater than 5000. A monitoring system is also provided including such a monitoring device, and a monitoring method carried out in the monitoring device.

Classes IPC  ?

• G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p.ex. indicateur optique de déformation
• G01B 11/28 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des superficies
• G01M 11/08 - Test des propriétés mécaniques