(57) Device for detection of falling objects that distinguishes between the rocks retained
or allowed to pass according to their size and impact energy, particularly applicable
for protection of land travel routes, communications routes or other infrastructures,
in certain areas of these that may be affected by falling objects that can obstruct
or damage them. It consists of a barrier (1) made up of mesh (2) attached to some
posts (3) equipped with a number of connectors (30) that have outlets connected to
an electrical cable (31), which has a closed circuit connection to a battery centre
(35) and a transmitter and antenna or optic fibre cable power supply control centre
(36). The connectors (31) are used for insertion of plugs (6) that, as a result of
the limits (12) especially designed for this purpose, secure the mesh (2) while also
closing the mentioned electrical circuit. The battery centre (35) generates the power
required to maintain the system active, the transmitter and antenna or optic fibre
cable power supply control centre (36) being connected to the system in such a way
that, when the current cannot complete the circuit because one of the connectors (30)
has been released, because there has been a failure in the battery centre (35), or
any other reason, it sends an alarm signal to a control centre it is connected to.
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