Protecting Gates
Volume 23 used May
to 2018
manage Edition
the routing of the sensor cable from the fence to the sliding gate panel .
• These systems are expensive , cumbersome , and prone to failure .
A thermal camera with a people tracking analytic applied to the video stream . Any movement inside the perimeter is tracked .
• Track intruders with a PTZ camera after an alarm is generated ( assists in assessment , response , and evidence collection ).
Protecting Gates
Balancing the operational and security requirements of actively used gates calls for careful attention .
A successful implementation needs to take into account authorized traffic , hours of operation , and the construction of the gate itself .
For swinging gates , a fence-mounted sensor can be installed on each moving panel .
• If the sensor is cable-based , the cable is looped around the fabric and routed underneath the gate to the other side .
• With this setup , the sensor can detect intrusions whenever the gate is closed .
• To enable authorized entry , the sensor could be masked during business hours or temporarily disabled via a keypad or another access control system .
Sliding gates have always posed a problem for cable-based sensors .
• Traditionally , a mechanical cable retraction system is
One common solution is to protect the gate with a pair of microwave or active IR sensors .
• Placed immediately behind the gate , they can detect intruders upon entry ( either after breaching the gate if closed or simply walking in if open ).
• This setup can work quite well , although it requires the installation of additional equipment .
Another solution is to use a wireless gate sensor .
• An embedded accelerometer analyzes gate movement in three-dimensions , enabling the sensor to distinguish between gate activity , intrusion attempts , and environmental conditions .
• The sensor communicates with a nearby processor over an encrypted and monitored wireless link .
If any suspicious event occurs – intrusion attempt , communication link failure , or an attempt to remove the sensor from the gate – an alarm is immediately generated .
Video analytics can play an important role with gate protection , both in terms of improving security and operational efficiency .
Most sites already have fixed cameras that monitor gate activity .
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