Laser communication-based alarm detection method and system

Abstract

The invention discloses a laser communication-based alarm detection method and a laser communication-based alarm detection system. The method comprises the following steps of: adopting a dual-beam detection mode, and arranging two pieces of receiving and transmitting equipment; arranging the two pieces of equipment at two ends of a monitoring area, wherein each piece of equipment comprises a transmitting end and a receiving end, the transmitting end of the first equipment and the receiving end of the second equipment are arranged oppositely, and the transmitting end of the second equipment and the receiving end of the first equipment are arranged oppositely; judging whether a laser signal exists at the receiving end of each piece of equipment or not to monitor the on-off condition of one path of beam by using each piece of equipment; reading and modulating the signal in a light ray to obtain the on-off condition of the other path of beam; and sending the other path of detection beam by using the transmitting end of each piece of equipment, modulating signal intensity information of the receiving end of each piece of equipment into transmitted light, and sending to opposite equipment. By the method and the system, the intensity of the transmitted light can be self-adjusted, the intensity of two paths of light signals is displayed respectively, system failure information can be output, time for blocking laser is accurately calculated, and a false alarm source is effectively shielded.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and relates to an alarm detection method, in particular to an alarm detection method based on laser communication; meanwhile, the invention also relates to an alarm detection system based on laser communication. Background technique [0002] With the development of society, some special places need stronger security measures to ensure the national interests and the safety of people's lives and properties. For example, important military facilities related to state secrets, the storage of important confidential documents, and important core technological facilities; and for example, the anti-theft security of the community, the security work of the bank vault, etc., all require efficient anti-intrusion security work. Therefore, as people have higher and higher requirements for safety and security systems, there is an urgent need for a reliable, low-false alarm rate intelligent security dev...

AI Technical Summary

Problems solved by technology

[0008] Finally, the traditional laser alarm has no ability to recognize some inevitable external interference, which will bring some troubles to users

For example, if the sunlight interferes with the system, the installation position of the receiver of the system is unreasonable or the latitude of the installation site is high, the sunlight may directly shine on the photoelectric sensor of the receiver at a certain time of the day, making it saturated and unable to detection

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