Laser-vision linked night invasion detection device

Abstract

The invention discloses a laser-vision linked night invasion detection device, which realizes the detection and identification of invasion events by laser detection and active vision technology at night. The invention relates to invasion detection technology in security protection, in particular to optoelectronic and visual information processing technology-based invasion detection. The technical problems needing to be solved are to detect and identify the invasion events of pedestrians or vehicles in an environment with poor light at night, and prevent false alarms. In the device, a modulated laser beam is used as a detection light source and is matched with a photoelectric signal collector, a photoelectric signal amplifier and a photoelectric signal processor to form a front-end unit; and a camera provided with active illumination and an embedded image processor are used as a rear-end response processing unit. When the invasion events occur in a detection area, a laser photoelectric signal is interrupted to trigger an active vision system so as to realize linkage and improve the reliability of the invasion detection. The laser-vision linked night invasion detection device can be used for anti-invasion security detection around residential areas, storerooms, airports and other important places.

Description

technical field [0001] The invention belongs to the technical field of photoelectricity and visual information, and relates to a pedestrian and vehicle intrusion detection device in the perimeter security of a nighttime place, in particular to an intrusion detection based on laser photoelectricity and visual information technology. Background technique [0002] For residential areas, warehouses, military areas, airports and other important places, the intrusion detection of pedestrians and vehicles has become an important task of security defense. When an unexpected intrusion occurs in the warning area, the security system needs to quickly detect, respond and identify the intrusion event, and send an alarm to take further measures to ensure the safety of the area. Especially at night, the visibility is reduced, and the surrounding road lights and other light sources cause light interference, which brings great challenges to visual surveillance. In order to prevent illegal i...

AI Technical Summary

Problems solved by technology

Visual surveillance has the following disadvantages: First, the amount of video data is huge, and multi-channel video makes artificial visual surveillance work tired, and it is easy to miss intrusion events; the huge amount of stored video data makes the processing and retrieval of video data more difficult

The disadvantage is that it is difficult for the system to distinguish the laser signal occlusion caused by small animals, leaves and other objects, and the system has a high false alarm rate

[0011] Based on the above perimeter intrusion detection technologies, the existing single technology has the problems of high cost and difficult layout (pulse electronic fence, leaking cable, optical fiber type, microwave type), or the use environment is limited (infrared type), or the environment Sensitive to illumination changes, low detection reliability (visual surveillance), or high system false alarm rate (laser photoelectric sensor), it is difficult to achieve low-cost, high-sensitivity, low false alarm rate intrusion detection and alarm

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