Sensor Fusion Example #3
Boolean Logic vs Sensor Fusion - Intruder with Ladder
This example has an intruder attempting to broach the site in Zone D, using a ladder to circumvent the fence sensor detection.
Although the camera detects the intruder, the fence does not because the ladder is not making sufficient contact with the fence. Because the Boolean system reduces nuisance alarms by requiring both sensor types to pick up activity in the same zone, it allows the intruder access to the site. That means that no alarm is triggered on intrusion, and the system fails to alert security.
Although the fence sensor may not indicate enough movement to indicate a human is scaling the fence, with sensor fusion, it can be adjusted to maximum sensitivity. As we discussed in a previous blog , running sensors with maximum sensitivity is one big benefit of a sensor fusion system. Because a sensor fusion solution rarely triggers nuisance alarms, all sensors feeding the system can be set with the highest sensitivity – a situation that would repeatedly create false alarms using other non-AI-based security solutions.
In this case, the extra sensitive sensor detects the pressure of the ladder accidentally touching or leaning against the fence. This, combined with the ability to recognize a human – as well as potentially a ladder – from the camera feed, allows the sensor fusion system to detect that this is a legitimate intrusion attempt, and it correctly reports an alarm for the intrusion.