CN113936402A - Perimeter security system and security scheme based on distributed optical fiber early warning system and video target identification technology - Google Patents
Perimeter security system and security scheme based on distributed optical fiber early warning system and video target identification technology Download PDFInfo
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- CN113936402A CN113936402A CN202010608451.9A CN202010608451A CN113936402A CN 113936402 A CN113936402 A CN 113936402A CN 202010608451 A CN202010608451 A CN 202010608451A CN 113936402 A CN113936402 A CN 113936402A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
- G08B13/122—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence
- G08B13/124—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence with the breaking or disturbance being optically detected, e.g. optical fibers in the perimeter fence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19602—Image analysis to detect motion of the intruder, e.g. by frame subtraction
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- Computer Vision & Pattern Recognition (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention relates to the technical field of public safety, and can be widely applied to a perimeter security system. The traditional distributed optical fiber early warning system based on the coherent Rayleigh scattering technology can realize long-distance real-time monitoring and accurate positioning, is convenient to lay, has strong anti-electromagnetic interference capability and is easy to engineer. But the problems of high false alarm rate, incapability of accurately identifying the type of the intrusion event and the like exist; the traditional video monitoring technology also has a series of problems that manual monitoring is needed or the distance between a person and the periphery cannot be judged, and the like. The invention provides a perimeter security system based on a distributed optical fiber early warning system and a video target identification technology, which has the following advantages: can be under the disconnected fine condition, in time report to the police impaired point or break point, no matter whether disconnected fine homoenergetic simultaneously can realize the accurate positioning to the invasion position, and then transfer the video camera to the real-time video monitoring of invasion position and record a video, can also in time catch intruder's identity information through video target identification technology.
Description
Technical Field
The invention relates to the technical field of public safety, can be widely applied to perimeter security systems, in particular to a distributed optical fiber perimeter security system based on a Rayleigh scattering (phi-OTDR) technology, and particularly relates to a distributed optical fiber perimeter security and video target identification system. The invention can be applied to places with higher requirements on perimeter safety, such as power plants, schools, airports, chemical enterprises, military, prisons, petroleum, pipelines and the like.
Background
In the mid-70's of the 20 th century, fiber optic sensors began to develop rapidly with the development of fiber optic and fiber optic communication technologies. The optical fiber sensor uses light waves as a carrier and optical fibers as a medium, and senses and transmits a novel sensing technology of an external measured signal, and modulates transmission light in the optical fibers through a measured physical quantity (such as stress, temperature, pressure, an electric field, a magnetic field and the like) to change the characteristics of the transmission light, such as intensity, phase, frequency, polarization state and the like, and detects the modulated light signal at a receiving end to obtain the novel sensor of the measured physical quantity. These fiber sensors can be further classified into three categories according to their ranges of action: point sensors (e.g., fiber microbend sensors, fiber Fabry-Perot sensors, fiber Bragg grating sensors, etc.), integral sensors (e.g., fiber Michelson interferometer and fiber Mach-Zehnder interferometer), and distributed sensors (e.g., stress, temperature distributed sensors made using the Brillouin scattering effect). Distributed optical fiber sensing has gained worldwide attention because of its ability to monitor data at every point of the optical fiber.
In recent years, with the increasingly complex social environment, the social security problem is more serious in the society with the increasingly developed information technology, and various accidents which are caused by artificial or natural disasters and endanger the social security frequently occur, the security problem of bank cash dispensers, the theft prevention of petroleum pipelines, the security problem of prisons, the personal and property security problem of residents, the security problem of schools, particularly the security problem of the recently-occurring kindergartens, so that the security problem of school buildings is raised to an unprecedented level. Social security issues also become the most important issue affecting social stability. It is very important to enhance the boundary alarm function of such mechanisms. The traditional countermeasure is to arrange some barriers (such as iron fences, fencing walls, wire fence nets, etc.) or obstacles at the peripheral perimeter of these areas, and to arrange personnel to strengthen patrol. Under the condition that criminals use advanced scientific technology at present and crime means are more complicated and intelligent, the traditional prevention means are difficult to adapt to the requirements of security work of key departments and key units. The human prevention is often influenced by factors such as time, regions, personnel quality and energy, and loopholes and errors are difficult to avoid. Therefore, it becomes a necessary measure to install the application of the advanced perimeter detection system.
The currently internationally applied perimeter detection systems mainly include the following: electronic fences, infrared correlation, leaky cables, fiber optic sensing, and the like. Compared with the traditional sensor, the optical fiber sensor has the unique advantages of non-contact measurement, high sensitivity, high response speed, electromagnetic interference resistance, ultrahigh voltage insulation, high temperature corrosion resistance, flame and explosion resistance, flexible deflection, wide measurement objects and the like. Therefore, the system has urgent application requirements in the aspects of large-scale projects, such as railway operation, water conservancy and hydropower projects, bridge tunnels, large exhibition halls and meeting places, oil and gas pipelines, large ships, environment and highway projects and the like, and the system can be used for perimeter security protection of large-scale project sites and major political, economic and military bases in the aspect of real-time monitoring, and can accurately and timely notify and confirm the occurrence position of an incident when the incident occurs by monitoring key areas in real time so as to reduce loss to the minimum. Therefore, the research on the distributed optical fiber sensing positioning system is a topic with very promising application prospect and practical significance. However, once the optical cable used for sensing and transmission is damaged or broken, the subsequent intrusion detection cannot be continued, which brings hidden dangers to perimeter security detection, and especially for places such as key military bases and financial institutions, the consequences are not reasonable.
The traditional distributed optical fiber early warning system based on coherent Rayleigh scattering (phi-OTDR) technology detects and positions external vibration signals by detecting the light intensity of backward scattering light scattered back from each part of an optical fiber. The phi-OTDR takes a common single mode fiber as an optical transmission and sensing carrier, can realize long-distance real-time monitoring and accurate positioning, is convenient to lay, has strong anti-electromagnetic interference capability, is easy to engineer, and is commonly used in the fields of safety detection of engineering structures, fiber perimeter protection, safety early warning of oil and gas pipelines and the like. However, the system still has the problems of high false alarm rate, incapability of accurately identifying the type of the intrusion event and the like; the traditional video monitoring technology also has a series of problems that manual monitoring is needed or the distance between a person and the periphery cannot be judged, and the like.
In the process of implementing the invention, aiming at the defects in the prior art, the inventor provides a perimeter security system which comprehensively uses a distributed optical fiber early warning system based on a coherent Rayleigh scattering (phi-OTDR) technology and a video target identification technology, and an optical cable laying mode, so that the system is ensured to accurately identify the type of an intrusion event, alarm is given in time, misinformation is reduced, and unnecessary resource waste is avoided.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a perimeter security system based on a distributed optical fiber early warning system and a video target identification technology, and the system has the following advantages: the system can timely alarm the damaged point or the broken point under the condition of fiber breakage, and meanwhile, the accurate positioning of the invasion position can be realized no matter whether the fiber is broken or not, so that the video camera is called to carry out real-time video monitoring and video recording on the invasion position, and the identity information of an invader can be timely captured through a video target identification technology.
In order to achieve the above object, the present invention provides a perimeter security system based on distributed optical fiber sensing and video target identification technology, comprising: the system comprises a central control system (1), a local area network switch (2), a visible light/infrared camera (3), a perimeter security cable (4) with at least two cores and a positioning type vibration optical fiber early warning system (5);
the at least two perimeter security cables (4) are directly laid on the perimeter fence or the enclosing wall, and two fiber cores of the at least two perimeter security cables (4) are arbitrarily extracted to serve as a main detection fiber core and a standby detection fiber core;
the positioning type vibration optical fiber early warning system (5) is provided with a main channel and a standby channel, the main channel is directly connected with a main detection fiber core at the starting end of the perimeter security optical cable (4) with at least two cores, and the standby channel is directly connected with a standby detection fiber core at the tail end of the perimeter security optical cable (4) with at least two cores;
the central control system (1) is respectively connected with the positioning type vibration optical fiber early warning system (5) and the visible light/infrared camera (3) through the local area network switch (2);
after receiving alarm information provided by a positioning type vibration optical fiber early warning system (5), the central control system (1) timely moves a visible light/infrared camera (3) in a corresponding area and obtains related video data before and after an intrusion event to carry out video target identification, and when the fact that a real intrusion event appears in a video area in the time period is clear, an alarm prompt is sent out on a display interface of the central control system (1);
in the security system based on the distributed optical fiber sensing and target identification technology, the positioning type vibration optical fiber early warning system (5) analyzes according to different intensities, frequencies and intervals of coherent Rayleigh scattering light, and judges whether an intrusion behavior exists.
Further, when the intrusion behavior is judged, the positioning type vibration optical fiber early warning system (5) carries out identification and analysis on the intrusion behavior according to the intensity, duration and interval of the scattered light signals.
Further, the intrusion behavior pattern includes touching, shaking, shearing, climbing, etc.
Further, after the intrusion behavior mode is judged, the positioning type vibration optical fiber early warning system (5) sends information such as alarm position, time and type to the central control system (1) through the local area network switch (2).
Furthermore, the central control system (1) calls video data of the visible light/infrared camera (3) in the corresponding area according to alarm information transmitted by the positioning type vibration optical fiber early warning system (5), whether the alarm information is a real intrusion behavior is fed back according to a video target recognition result within a specific time period before and after the alarm time, if the alarm information is a false intrusion behavior, the alarm is not given, if the alarm information is a real intrusion behavior, an alarm prompt is sent out on a display interface, and meanwhile, the video data at the corresponding time is popped up.
In the security system based on the distributed optical fiber sensing and target identification technology, when the positioning type vibration optical fiber early warning system (5) detects, if the no-damage event of the perimeter security optical cable (4) with at least two cores occurs, only the main channel works; if the damage occurs, a main channel and a standby channel are started at the same time, the main channel detects the area from the main channel port to the damage point, and the standby channel detects the position from the damage point to the standby channel port.
Further, when a damage event occurs, the positioning type vibration optical fiber early warning system (5) can transmit the damage event to the central control system (1) through the local area network switch (2) until the damage event is recovered to be normal.
Furthermore, after a damage event occurs and when an intrusion behavior occurs, the positioning type vibration optical fiber early warning system (5) can simultaneously utilize the alarm data of the main channel and the standby channel to perform intrusion behavior identification analysis, and if the judgment result of the main channel or the standby channel accords with the intrusion behavior, relevant alarm information is sent to the central controller (1); if the main channel and the standby channel judge results simultaneously accord with intrusion behaviors, the positioning type vibration optical fiber early warning system (5) simultaneously sends related alarm information of the main channel and the standby channel to the central controller (1), the central controller (1) simultaneously calls video data of the visible light/infrared camera (3) in a corresponding area, whether the alarm information is a real intrusion behavior is fed back according to the video target identification result in a specific time period before and after the alarm time, if the alarm is judged to be a false intrusion behavior, the alarm is not sent out, if the alarm is judged to be a real intrusion behavior, an alarm prompt is sent out on a display interface, and meanwhile, video data corresponding to the time are popped up.
Based on the technical scheme, compared with the prior art, the invention has the following advantages:
1. the invention can timely alarm the damage condition of the optical cable under the condition of optical fiber damage (fiber breakage or bending damage), and accurately position the damaged point.
2. The invention can continue to monitor under the condition of optical fiber damage, and can still accurately position the intrusion position when the intrusion behavior occurs, so that managers can be more familiar with the field condition and can respond in time.
3. The distributed optical fiber early warning system based on the coherent Rayleigh scattering (phi-OTDR) technology and the video target identification technology are comprehensively applied, so that the problems that the conventional distributed optical fiber early warning system based on the coherent Rayleigh scattering (phi-OTDR) technology is high in false alarm rate, cannot accurately identify the type of an intrusion event and the like are solved, and a series of problems that the video identification technology needs manual monitoring and cannot distinguish the distance between peripheral personnel and the periphery are solved.
Drawings
FIG. 1 is a schematic diagram of a perimeter security system based on distributed optical fiber sensing and video target identification technologies according to the present invention.
Detailed Description
The following detailed description will be made with reference to the accompanying drawings and specific embodiments to clearly understand the structural composition and the usage of the security system based on the distributed optical fiber sensing and object recognition technology, but the scope of the present invention is not limited thereby.
As shown in fig. 1, a security system based on distributed optical fiber sensing and target identification technology comprises a central control system (1), a local area network switch (2), a visible light/infrared camera (3), a perimeter security optical cable (4), and a positioning type vibration optical fiber early warning system (5);
the peripheral security protection optical cable (4) is directly connected with the positioning type vibration optical fiber early warning system (5), the central control system (1) obtains the related information of the positioning type vibration optical fiber early warning system (5) and the visible light/infrared camera (3) through the local area network switch (2), and the visible light/infrared camera is controlled;
the at least two perimeter security cables (4) are directly laid on the perimeter fence or the enclosing wall, and two fiber cores of the at least two perimeter security cables (4) are arbitrarily extracted to serve as a main detection fiber core and a standby detection fiber core;
the positioning type vibration optical fiber early warning system (5) is provided with a main channel and a standby channel, the main channel is directly connected with a main detection fiber core at the starting end of the perimeter security optical cable (4) with at least two cores, and the standby channel is directly connected with a standby detection fiber core at the tail end of the perimeter security optical cable (4) with at least two cores;
the central control system (1) is respectively connected with the positioning type vibration optical fiber early warning system (5) and the visible light/infrared camera (3) through the local area network switch (2);
after receiving information such as alarm positioning and time and the like given by a positioning type vibration optical fiber early warning system (5), the central control system (1) timely moves a visible light/infrared camera (3) in a corresponding area and obtains related video data, the video data is pushed backwards for a specific time from the alarm time of the positioning type vibration optical fiber early warning system (5), the accuracy of target identification is guaranteed, and when it is clear that a specified target appears in a video area in the time period, an alarm prompt is given out on a display interface of the central control system (1);
a security system and a security method based on distributed optical fiber sensing and target identification technology are disclosed, wherein the security process comprises the following steps:
step 1: directly laying the at least two perimeter security cables (4) on a perimeter fence or a fence, and optionally extracting two fiber cores of the at least two perimeter security cables (4) as a main detection fiber core and a standby detection fiber core;
step 2: the positioning type vibration optical fiber early warning system (5) is provided with a main channel and a standby channel, the main channel is directly connected with a main detection fiber core at the starting end of the perimeter security optical cable (4) with at least two cores, and the standby channel is directly connected with a standby detection fiber core at the tail end of the perimeter security optical cable (4) with at least two cores;
and step 3: when a detected target enters a security area, at least two perimeter security optical cables (4) are touched or damaged, and an invasion event occurs;
and 4, step 4: the positioning type vibration optical fiber early warning system (5) realizes quick real-time positioning of an alarm area and mode identification of an intrusion event;
and 5: the positioning type vibration optical fiber early warning system (5) feeds back related positioning information to the central control system (1) through the local area network switch (2);
step 6: the central control system (1) accesses the visible light/infrared camera (3) of the corresponding area through the local area network switch (2) by utilizing the positioning information to obtain video data of an intrusion event target area before and after the event moment;
and 7: the central control system (1) analyzes related data by utilizing a video target identification technology, performs real-time alarm processing when a clear person or other specified targets are identified in an alarm area, and stores information such as real-time alarm video and the like.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: the system comprises a central control system (1), a local area network switch (2), a visible light/infrared camera (3), a perimeter security optical cable (4) with at least two cores and a positioning type vibration optical fiber early warning system (5);
the at least two perimeter security cables (4) are directly laid on the perimeter fence or the enclosing wall, and two fiber cores of the at least two perimeter security cables (4) are arbitrarily extracted to serve as a main detection fiber core and a standby detection fiber core;
the positioning type vibration optical fiber early warning system (5) is provided with a main channel and a standby channel, the main channel is directly connected with a main detection fiber core at the starting end of the perimeter security optical cable (4) with at least two cores, and the standby channel is directly connected with a standby detection fiber core at the tail end of the perimeter security optical cable (4) with at least two cores;
the central control system (1) is respectively connected with the positioning type vibration optical fiber early warning system (5) and the visible light/infrared camera (3) through the local area network switch (2);
after the central control system (1) receives alarm information provided by the positioning type vibration optical fiber early warning system (5), the visible light/infrared camera (3) in the corresponding area is timely called, relevant video data before and after an intrusion event are obtained to carry out video target identification, and when the fact that a real intrusion event appears in the video area in the time period is clear, an alarm prompt is sent out on a display interface of the central control system (1).
2. A perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: the security system based on the distributed optical fiber sensing and target identification technology as claimed in claim 1, wherein the positioning type vibration optical fiber early warning system (5) analyzes according to different intensities, frequencies and intervals of coherent Rayleigh scattering light, judges whether there is an intrusion behavior and carries out intrusion behavior identification analysis.
3. A perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: the intrusion behavior pattern of claim 2 comprising touching, shaking, shearing, climbing, etc.
4. A perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: the security system based on the distributed optical fiber sensing and target identification technology as claimed in claim 1, wherein after the positioning type vibration optical fiber early warning system (5) determines the intrusion behavior mode, the alarm position, time, type and other information are sent to the central control system (1) through the local area network switch (2).
5. A perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: the security system based on the distributed optical fiber sensing and target identification technology as claimed in claim 1, wherein the central control system (1) calls video data of the visible light/infrared camera (3) in the corresponding area according to the alarm information transmitted by the positioning type vibration optical fiber early warning system (5), feeds back whether the alarm information is a real intrusion behavior according to the video target identification result within a specific time period before and after the alarm time, does not alarm when a false intrusion behavior is judged, sends an alarm prompt on a display interface when a real intrusion behavior is judged, and simultaneously pops up the video data at the corresponding time.
6. A perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: the security system based on the distributed optical fiber sensing and target identification technology as claimed in claim 1, wherein when no damage event occurs to the at least two perimeter security cables (4), only the main channel works; when an event such as damage or breakage occurs, the device automatically activates a main channel which detects the area from the main channel port to the damage point and a backup channel which detects the position from the damage point to the backup channel port.
7. A perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: a perimeter security protection system and a security protection scheme based on a distributed optical fiber early warning system and a video target identification technology are characterized in that: the method comprises the following steps:
step 1: directly laying the at least two perimeter security cables (4) on a perimeter fence or a fence, and optionally extracting two fiber cores of the at least two perimeter security cables (4) as a main detection fiber core and a standby detection fiber core;
step 2: the positioning type vibration optical fiber early warning system (5) is provided with a main channel and a standby channel, the main channel is directly connected with a main detection fiber core at the starting end of the perimeter security optical cable (4) with at least two cores, and the standby channel is directly connected with a standby detection fiber core at the tail end of the perimeter security optical cable (4) with at least two cores;
and step 3: when a detected target enters a security area, at least two perimeter security optical cables (4) are touched or damaged, and an invasion event occurs;
and 4, step 4: the positioning type vibration optical fiber early warning system (5) realizes quick real-time positioning of an alarm area and mode identification of an intrusion event;
and 5: the positioning type vibration optical fiber early warning system (5) feeds back related positioning information to the central control system (1) through the local area network switch (2);
step 6: the central control system (1) accesses the visible light/infrared camera (3) of the corresponding area through the local area network switch (2) by utilizing the positioning information to obtain video data of an intrusion event target area before and after the event moment;
and 7: the central control system (1) analyzes related data by utilizing a video target identification technology, performs real-time alarm processing when a clear person or other specified targets are identified in an alarm area, and stores information such as real-time alarm video and the like.
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| CN115410403B (en) * | 2022-04-19 | 2023-11-10 | 北京见合八方科技发展有限公司 | Road vehicle positioning tracking method and device based on passive perception and readable medium |
| CN114964330A (en) * | 2022-06-02 | 2022-08-30 | 浙江大学湖州研究院 | Fault monitoring system and method based on optical fiber sensing and multi-parameter fusion |
| CN117315867A (en) * | 2023-09-13 | 2023-12-29 | 南京禄口国际机场空港科技有限公司 | Flight area surrounding alarm method and system |
| CN117351626A (en) * | 2023-09-29 | 2024-01-05 | 南京派光智慧感知信息技术有限公司 | Security induction detection system and method |
| CN117830053A (en) * | 2023-12-22 | 2024-04-05 | 中国电子信息产业集团有限公司第六研究所 | Perimeter security alarm system and method |
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