INTRUSION DETECTION DEVICE FOR A FENCE

摘要

The invention relates to a device intended to be incorporated in a sheet of wire fencing comprising two end posts (PE), in between which are the tautened wires (F), and an intermediary detector post (PI) having oscillating mounted support heads (S). A corresponding wire (F) is fixed to each of said heads with stress balancing means on either side. A portion of flexible casing of a liquid-filled housing is connected to each support head (S) such that the oscillation of the head (S) causes a deformation in said portion of flexible casing producing a difference in the pressure in the housing which is detected by the pressure sensor.