Perimetric protection of buildings

Perimetric protection is an element of a security system designed to produce an alarm in case of entry/intrusion of an unauthorised person into a monitored area. By definition, it is used to protect the perimeter of the protected site. It can be implemented at the perimeter of either the whole area or a specific section surrounding an important site. A variety of technologies can be used based on the environmental conditions, each one having its advantages and limitations.
Technologically, the devices used in perimetric protection systems use sensors based on:
  • Infrared radiation: motion sensors, IR barriers
  • Microwaves: motion sensors, MW barriers
  • Seismic analysis: seismic detectors, cables
  • Video analysis: online analysis of camera footage, specialised video analysing devices
  • Thermovision: thermocameras Laser analysis: specialised detectors
  • Fibre optics: Passive sensors
or their combinations.

It is important to take into account the phase of construction when perimetric protection should be implemented. It is most appropriate to design the system simultaneously with the construction project design. This should avoid trade-offs due to the inability to install devices at the required locations or using simpler and more cost-effective technologies.

Perimetric protection should be linked to the camera system in order to enable an immediate evaluation of an alert. The priority of perimetric protection is not the absence of false alarms; generally, higher levels of security involves more sensitive systems, which leads in practice to an increased frequency of false alarms in need of examination.

Perimetric protection systems require a particularly thorough design. A combination of technologies is usually used, so that an optimal system that corresponds to the required security level and falls within a suitable price range can be designed.

There is a big difference between the perimetric protection of a house and a high-security site. The required security level significantly influences the total cost of the solution.

When planning systems for sites with the highest security level, additional necessary operational and organisational measures have to be allowed for, by creating special zones, etc. Plans for residential sites, however, also require consideration of the environmental parameters, otherwise the system will be unreliable or completely dysfunctional.

Technologies can be installed so that they are apparent, contributing a deterring function, or unapparent and built into the architecture or located underground, for such sites where aesthetics is key (mainly historic sites) or where the owner needs a specific level of security without attracting attention.

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