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VIBRATION DETECTION SENSOR

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A protective 2700 mm high barrier with 27 taut barbed wires, stretched between anchor posts, (wire tension shall be such that when a 2kg weight is applied between two slider posts the wire deflection shall be between 50mm and 75mm. All wires shall be of the same tension) and supported by a number of slider posts and detection sensors. The Vibration Detection Sensor employs the following two integrated technologies:

• Taut wire Detection
• Detection for delay fence

The Vibration Detection Sensor shall be based on kinematics principles detecting any cut or removal of components of the delay fence. This detection system gets installed on the outer perimeter fence. Furthermore the outer fence detection system shall be installed on the outer perimeter fence attached to the outer fence structure as per the specifications of the technology manufacturer.

Detection Fance

The Vibration Detection Sensor is installed as a stand-alone system located on the facility side of the outer perimeter fence. The electronic barrier consists of the following:

    • A protective 2700 mm high barrier with 27 taut barbed wires, stretched between anchor posts, (wire tension shall be such that when a 2kg weight is applied between two slider posts the wire deflection shall be between 50mm and 75mm. All wires shall be of the same tension) and supported by a number of slider posts and detection sensors.
    • 600mm wide side walk should be constructed directly below the taut wire system and extend 400 mm to the facility side of the taut wire fence as shown on the layout drawings i.e. 1000mm wide in total. The sidewalk shall run the continuous length of the inner perimeter fence as indicated on the perimeter fence layout drawing.
All corners are designed so the taut wire intersects. The Vibration Detection sensors are mounted on a sensor post constructed of galvanized steel. The sensors are spaced according to the wire spacing specification. (Bottom 18 wires 90mm, then 9 wires at 120mm spacing) All corners are designed so the taut wire intersects. The Vibration Detection sensors are mounted on a sensor post constructed of galvanized steel. The sensors are spaced according to the wire spacing specification. (Bottom 18 wires 90mm, then 9 wires at 120mm spacing)

Movement transfer wires High, tensile, double-braided barbed wire.
    • Minimum breaking strength of 439 Kg.
    • Barbed 4 points.
    • Average spacing of the barbs is not to exceed 125 mm.
    • Galvanized steel.

Zone Identification:

In order for the officers inside the compound to easily identify zone locations, at the top of each sensor post, a 250mm x 200mm sign shall be installed. The sign shall face the inside compound.
    • All zones will be identified by a zone number.
    • Reflective white numbers on a dark blue background will be used.
    • All signs are visible from a distance of 12 meters.

In order for the perimeter patrol officer to easily identify zone locations, at the end of each zone a 500mm x 250mm sign shall be installed. The sign shall face the perimeter road.
    • All zones shall be identified by zone number.
    • Black numbers on a reflective yellow background shall be used.
    • All signs shall be visible from a distance of 12000mm.

Enclosure

All exterior post mounted enclosures have the following features:
    • At least 1.6 mm stainless steel plate construction.
    • Continuously welded seams.
    • Cabinet lockable with all locks keyed alike.
Equipped with tamper detection device connected to the processor tamper circuit. The tamper switch shall detect any attempt to vandalize the enclosure including the opening of the door and the cutting or breaking of the enclosure.