Photon fence system for perimeter security monitoring at night

Abstract

The invention discloses a photon fence system for monitoring on security protection of perimeter at night. The system comprises: a pulsing laser, which is used for emitting a laser pulse to carry out illumination on an object; a gated imaging device, which is used for controlling exposure time by a pulse width of a gated pulse; a time schedule controller, which is used for controlling time delay between the gated pulse and the laser pulse; and a computer, which is used for carry out controlling, image processing and displaying on the pulsing laser, the gated imaging device and the time schedule controller. According to the system provided in the invention, a pulsing laser is utilized as a light source and a gated imaging device is employed as a detector; time delay between a gated pulse and a laser pulse is controlled so as to establish a photon fence in space, wherein the photon fence is invisible for human eyes; therefore, when an invading object passed through the photon fence, image information of the invading object is collected and background outside the photon fence and a non-invading object are removed by filtering, so that non-background extraction on the invading object is realized.

Description

technical field [0001] The invention relates to the technical field of night vision, in particular to a nighttime perimeter security monitoring photon barrier system for nighttime intrusion alarm. Background technique [0002] Intrusion alarm technology has become a research hotspot at home and abroad, especially the research on intrusion alarm technology at night is the most urgent, mainly because in the night environment, suspects can quickly escape into dark areas to hide or escape after committing crimes, and it is easy to find hiding places. This makes it very difficult to hunt or search. Therefore, suspects often commit crimes at night without any scruples, which leads to crimes such as theft, robbery, robbery, and injury at night are much higher than during the day. [0003] For non-imaging intrusion alarm technologies, such as infrared radiation devices, electronic fences, optical fiber vibration sensors, etc., their installation positions are relatively obvious, and...

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Problems solved by technology

[0008] Aiming at the deficiencies in the above-mentioned prior art, the main purpose of the present invention is to provide a nighttime perimeter security monitoring photon fence system to erect photon fences invisible to human eyes around important places to solve the problem of long-distance intrusion target imaging detection. The problem

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