Intrusion detection device

Abstract

The invention provides an intrusion detection device and belongs to the technical field of public safety. The intrusion detection device comprises a passive infrared detection unit, a camera, a video image analyzer and an alarm unit, wherein the passive infrared detection unit is used for acquiring the human or animal alarm signals with vital signs; the camera is used for acquiring a video image; the video image analyzer is used for analyzing the video image acquired by the camera and extracting the alarm signals with human signs; and the alarm unit is used for analyzing the alarm signals with the human signs recognized by the video image analyzer in combination with the human or animal alarm signals with the vital signs detected by the passive infrared detection unit, and rejecting the alarm signals with the human sign outline but without the vital signs or the alarm signals with the vital signs but without the human sign outline so as to ensure that the recognition alarm only aims at the intruding human bodies, thereby realizing the functions of advanced alarming and accurate alarming.

Description

technical field [0001] The invention belongs to the technical field of public safety, and in particular relates to an intrusion detection device. Background technique [0002] The principle of the passive infrared detector is that there is a difference between the surface temperature of the human body and the temperature of the surrounding environment. When the human body moves, the change caused by this difference can be detected by the infrared sensitive element, thereby triggering an alarm. Objects that radiate heat cannot be recognized normally, resulting in a high rate of false positives. [0003] Simple use of intelligent video analysis technology to analyze the collected video images and intelligently analyze the appearance characteristics, it is impossible to judge whether it is a living object or an object similar to the human body, and has the disadvantages of poor adaptability to the environment. In complex environments, it is easy to False negatives and false po...

AI Technical Summary

Problems solved by technology

[0002] The principle of the passive infrared detector is that there is a difference between the surface temperature of the human body and the temperature of the surrounding environment. When the human body moves, the change caused by this difference can be detected by the infrared sensitive element, thereby triggering an alarm. Objects that radiate heat cannot be recognized normally, resulting in a high rate of false positives

[0003] Simple use of intelligent video analysis technology to analyze the collected video images and intelligently analyze the appearance characteristics, it is impossible to judge whether it is a living object or an object similar to the human body, and has the disadvantages of poor adaptability to the environment. In complex environments, it is easy to False negatives and false positives are generated, and it is too sensitive to some static scenes, such as lights, reflections, shaking leaves, etc., may also trigger false alarms

[0004] Therefore, a single intrusion detection device implemented by one of the technologies has the defects of high false alarm rate and false negative rate.

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