VibraSector®, from Detection Technologies represents the latest development in the field of fence intrusion detection systems which offer accurate location of hostile events occurring at any point along the perimeter of a protected site.

VibraSector® utilises Detection Technologies’ tried and tested VibraTek sensor cable of which more than 250kM has been installed on some of the most security-conscious sites in the world including prisons, airports, power stations, military establishments, as well as many sensitive industrial facilities.

Each VibraSector® analyser offers the ability to monitor and control up to 1000 metres of VibraTek® sensor cable which may be segmented into 100 sub-zones so that the location of intruder-related activity detected by the sensor cable may be identified to an accuracy of 1%.

Each VibraSector® sub-zone can be allocated its own set of detection parameters so that variations in fence quality and type may be accommodated within a single system without incurring false alarms or detection ‘blind spots’ that would be inevitable without such flexibility.

Unlike other systems claiming to offer intrusion point location capability, VibraSector® provides high quality audio verification in which audio signatures resulting from hostile events are stored in digital format so that they may be recalled and replayed from any remote location.

This feature is a valuable tool that may be used by security staff to confirm received alarms as being the result of genuine intrusions.

VibraSector® is fully compatible with industry standard IP networks to ensure that integration and communication with a security management system is easily accomplished. All system configuration commands, alarm information and digital audio are accessible through the IP connection on each VibraSector® analyser.

Integration with legacy control equipment is achieved using the VibraSector® relay module in which a relay contact can be allocated to every detection sub-zone so that a simple, dry contact interface may be easily implemented.

The unique properties of the VibraTek® sensor cable allows mixing and matching of ‘live’ sensor cable with ‘dead’ interconnecting cable so that non-sensitive areas may be inserted as required into the site perimeter while still maintaining the capability to protect up to 1000 metres of fence with ‘live’ sensor cable.

Range calibration and sensitivity adjustment of the VibraSector® detection system is a simple and straightforward process which utilises Detection Technologies’ own VESPA engineering software to complete this task.

System Architecture

A typical VibraSector® system comprises a VibraSector® signal analyser connected to a loop of VibraTek sensor cable which is divided into sub-zones by a series of VibraSector® segmentation modules. The following schematic depicts a typical ring configuration.

Each VibraSector® analyser can monitor and control up to 1000 metres of VibraTek 3G® sensor cable with up to 100 segmentation modules.

Segmentation modules define the physical sub-zones, are entirely passive, and require no power or data connections. Additionally, each segmentation module is sealed making it suitable for all external environments.

Each segmentation module includes all components necessary to fully integrate each module with the VibraTek 3G® sensor cable.

Sub-zone lengths may be set to any length to suit site conditions and can easily be re-positioned in the event that such requirements and hence sub-zone lengths need to be altered.

Sub-zones may be combinations of sensor cable and ‘dead’ cable if site conditions dictate that non-sensitive sections are required within a sub-zone in order to bridge natural barriers between sub-zones such as roads or ditches.

Each VibraSector® analyser provides a facility to monitor 4 relay contact inputs to simplify the integration of 3rd party detection systems into the overall security system.

The VibraSector® analyser also incorporates a sophisticated sensor cable tamper circuit so that, as well as detecting any damage to the integrity of the sensor cable, the position of such damage is also indicated.

An optional external relay module may be ‘paired’ with a VibraTek® analyser residing on the same local area network. This allows the relay module to be located at any point on the network. The external relay module also provides a facility to monitor the audio generated by the sensor sub-zones at the location of the relay module.

In cases where multiple VibraSector® analysers are used to cover larger sites, the sensor array may be installed in a star configuration rather than the ring configuration depicted previously. In this configuration, the remote end of the sensor cable array is returned to the VibraSector® analyser using a simple twisted pair ‘dead’ cable.

Sensor Segmentation

VibraSector® works by sub-dividing a length of sensor cable into a series of discrete segments. Powerful monitoring and analysis processes embedded within the VibraSector® analyser enable accurate identification of the origin of the signals detected by the sensor cable. The VibraTek 3G® sensor cable is segmented using a special module which is introduced into the sensor cable at intervals to suit the site requirements. Sensor cable segments separated by these modules are referred to as sub-zones with each sub-zone having a unique set of detection parameters.

This powerful capability ensures optimum performance even when variations in fence construction are included within the protected perimeter since each different fence type can be allocated it’s own set of detection parameters.

Additionally, since each sub-zone may be any length, gates and other ‘non-fence’ sections of the perimeter may be allocated sub-zone lengths that encompass only those features. A maximum of 100 sub-zones can be accommodated by the system thereby providing a positional accuracy of 1%.

In terms of sub-zone length, a system utilising the maximum amount of sensor cable (1000 metres) and sub-zones (100) would result in a sub-zone length of 10 metres. This is accepted in the industry as being more than adequate for virtually every security application. Shorter sub-zones may be implemented simply by using the maximum number of segmentation modules within a total sensor cable length which is less than the permitted maximum.

Each segmentation module incorporates plug-in connectors to facilitate easy and reliable connection between sensor cable and segmentation module. These connectors are encapsulated within the module housing and are fully protected against all environmental conditions.