Alarm System with Probabilistic Reject of False Alerts

A home security system is designed to detect illegal intruders and to warn the home owner. When home owners are sleeping or they are not at home, the alarm system is started in order to monitor the house and trigger the alarm if there is an illegal intruder. However, the alarm system can be activated by a pet sending a false alert. In this work a probabilistic technique is presented in order to reduce false alerts provoked by domestic animals. The system uses standard passive infrared sensors to determine the mass and the speed of a target under its influence to determine a point in a mass-speed space where only those measurements which are most likely to come from a human being can trigger the alarm.