KR102413212B1 - Apparatus for detecting invasion - Google Patents

Abstract

The present invention relates to an intrusion detection apparatus comprising: a plurality of fences; optical fibers installed on the plurality of fences; an optical fiber installation database in which installation information of the optical fibers installed on each fence is stored; an OTDR measurement unit for generating and outputting failure-point optical fiber length information of the optical fibers; and an intrusion position determination unit. Each fence includes a plurality of iron poles and a plurality of iron fence lines positioned between adjacent iron poles, and the optical fibers are installed on the plurality of iron poles and the plurality of iron fence lines and include a plurality of optical fiber ends positioned adjacent to each other in the height direction of the iron poles. The installation information of the optical fibers includes one of an identification number, a fence start length and fence end length, an iron pole start position and iron pole end position, the number of optical fiber ends, an optical fiber installation start position, an optical fiber travel direction, and an optical fiber end length of each fence. The intrusion position determination unit selects one fence to which the failure-point optical fiber length information belongs, by using the fence start length and fence end length of each fence, and determines which optical fiber end the optical fiber length information corresponds to within the selected fence by using a fence start length, an optical fiber installation start position, an optical fiber end length, and an optical fiber travel direction of the selected fence.

Description

Intrusion detection device {APPARATUS FOR DETECTING INVASION}

The present invention relates to an intrusion detection device, and more particularly, to an intrusion detection device using an optical fiber.

Security fences are often installed in facilities and areas requiring security. In order to monitor the intrusion of these security fences, monitoring personnel are sometimes deployed. However, the monitoring method by monitoring personnel has problems in that the maintenance cost is high and the monitoring accuracy is low.

To supplement this, recently, a surveillance method using CCTV (closed circuit television) has been widely used. However, although the monitoring method using CCTV significantly reduces manpower consumption compared to the monitoring personnel arrangement method, there is still a disadvantage that a person has to directly monitor the shooting screen. In addition, when the monitoring area is wide enough to be several km or more, many camera devices need to be installed, so the installation and maintenance cost of the device is high.

In addition, recently, a monitoring method using an RF method is also used. In the monitoring method using the RF method, a transmission line is mounted on a security fence, and an electrical RF signal is applied to the transmission line. When an intruder passes through or damages the transmission line, the RF signal is changed, so that the intrusion can be automatically detected. However, this method has a disadvantage in that it is not possible to accurately specify the location where the intrusion occurred in the guard area.

An intrusion monitoring method using an optical line can solve this problem. The intrusion monitoring method using the optical fiber has the advantages of being able to monitor a wide area, automatically generating an intrusion alarm, and identifying the location where the intrusion occurred.

Korean Patent Laid-Open Patent No. 10-2018-0128558 (Publication date: December 04, 2018, title of invention: repeater optical core monitoring system using OTDR) Korean Patent Registration No. 10-1857558 (Announcement Date: May 14, 2018, Title of Invention: Portable OTDR with LED Condensing Module applied)

The problem to be solved by the present invention is to quickly detect an intrusion position of an outsider in the fence.

The intrusion detection device according to one aspect of the present invention stores installation information of a plurality of fences installed adjacent to each other, optical fibers that are seamlessly connected to one another and installed in a plurality of fences, and the optical fibers installed in each of the plurality of fences, An optical fiber installation database, which is connected to the optical fiber, and includes an OTDR measurement unit for generating and outputting failure point optical fiber length information, and an intrusion location determination unit connected to the OTDR measurement unit and the optical fiber installation database, each fence being spaced apart It includes a plurality of poles and a plurality of fence lines positioned between adjacent poles.

The optical fiber is installed in contact with or adjacent to the plurality of poles and the plurality of fence lines, and includes a plurality of optical fiber ends located adjacently along the height direction of the poles, and the optical fiber installation information includes an identification number of each fence, a fence and at least one of a starting length and an end length of the fence, a starting position and an ending position of the pontoon, the number of optical fiber stages and an optical fiber installation starting position, an optical fiber traveling direction, and an optical fiber end length.

The intrusion position determination unit selects one fence to which the failure point optical fiber length information belongs from among a plurality of fences using the fence start length and the fence end length of each fence, and the fence start length for the selected fence, the optical fiber installation start position , it is determined which optical fiber end corresponds to the optical fiber length information within the selected fence using the optical fiber end length and the optical fiber propagation direction.

The intrusion detection device according to the above feature may further include a first pass gate positioned in one of the plurality of fences and a second pass gate positioned between two adjacent fences, wherein the first pass gate and the second pass gate are each frame and a plurality of fence lines installed on the frame, and the optical fiber may include each frame of the first gate and the second gate and a plurality of optical fiber ends located adjacent to or adjacent to each fence line.

The optical fiber installation information may further include installation information for the first gate and the second gate.

The intrusion detection apparatus according to the above feature is connected to the intrusion detection determination unit, and under the control of the intrusion detection determination unit, information on the length of the fault point fiber, the selected fence and the optical fiber end, and the pontoon start position and the pontoon end position of the selected fence It may further include an information output unit for outputting.

The OTDR measurement unit includes a light emitting diode that outputs an input optical signal to the optical fiber, a photodiode that detects reflected light generated at a failure point of the optical fiber and outputs a reflected optical signal, and compares the input optical signal with the reflected optical signal to determine the failure It may include a control unit for generating point optical signal position information.

According to this feature, the intrusion detection device can quickly inform the security guard not only of the location of the fence where the fault point has occurred, but also which optical fiber end has the fault point within the fence.

Accordingly, the security guard can immediately recognize the fence where the failure point has occurred and the position of the optical fiber in the fence without having to search for a corresponding fence among a plurality of fences and check the state of optical fibers in the discovered corresponding fence.

Accordingly, an area suspected of intrusion by an outsider is quickly identified in the guard area, thereby reducing the risk of theft or security.

In addition, there may be an effect of greatly saving time and manpower for searching an area suspected of intrusion of an outsider.

1 is a schematic block diagram of an intrusion detection apparatus according to an embodiment of the present invention.
2 is a conceptual diagram of a fence of an intrusion detection device according to an embodiment of the present invention.
3 is a schematic block diagram of an intrusion detection apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that adding a detailed description of a technique or configuration already known in the relevant field may obscure the gist of the present invention, it will be partially omitted from the detailed description. In addition, the terms used in this specification are terms used to properly express the embodiments of the present invention, which may vary according to a person or custom in the relevant field. Accordingly, definitions of these terms should be made based on the content throughout this specification.

The terminology used herein is for the purpose of referring to specific embodiments only, and is not intended to limit the invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of 'comprising' specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

Hereinafter, an intrusion detection device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, the operating principle of the intrusion detection device of the present invention will be described.

The intrusion detection device of this embodiment installs an optical fiber between fence posts, such as a pole, and can detect an intrusion state of an outsider in the guard area using a signal output from the optical fiber.

At least one fence may be installed in the guard area to prevent intrusion of an outsider.

Each fence may include a plurality of poles installed to be spaced apart along a plane direction that is a direction parallel to the ground (eg, a direction parallel to the ground) at a predetermined interval, and a plurality of fence lines installed between the poles.

In this case, the fence lines positioned between the two adjacent poles may be installed at predetermined intervals along the height direction of the poles (eg, the direction intersecting with the ground). At this time, the number of fence lines positioned between two adjacent poles is determined according to the height of the poles, and as the height of the poles increases, the number of fence lines positioned between the corresponding poles may also increase.

In addition, the distance between the two fences adjacent in the height direction may be adjusted according to the object for detecting the intrusion.

Therefore, a fence having such a structure, as already described, a plurality of guarding zones along the plane direction may be spaced apart at a predetermined interval. In this case, two fences adjacent in the planar direction may share the same pontoon.

In addition, two fences may be installed vertically along the height direction. In this case, the upper and lower fences arranged side by side in the height direction may share all of the fences or only some of the fences.

When the upper fence and the lower fence share only some of the fences, the upper fence may share only some of the fences with the lower fence among a plurality of fences included in the lower fence.

In this way, using the same intrusion detection device, one optical fiber may be installed in a predetermined shape in a plurality of fences positioned along at least one of a plane direction and a height direction.

Accordingly, one optical fiber may be installed in a predetermined shape in each fence.

In addition, the number of poles included in each fence, the number of fence lines and optical fiber ends installed between the poles may be the same or different from each other, and the installation form of optical fibers positioned in each fence may also be the same or different. .

Both ends of the optical fiber may be connected to the OTDR measuring unit, so that the optical fiber may receive an optical signal from the OTDR measuring unit and output an optical signal corresponding to the state of the optical fiber to the OTDR measuring unit.

Accordingly, the OTDR measuring unit may output the length of the optical fiber at the point of failure (ie, length information of the optical fiber in which the point of failure occurs) related to the position of an abnormal point such as a break or bend in the optical fiber using a signal input from the optical fiber. In this example, the unit of the optical fiber length information at the point of failure may be a meter (m).

The OTDR measuring unit may be a measuring device using the OTDR method.

In the OTDR method, an optical pulse signal, which is a signal in the form of a pulse, is incident on the optical fiber to be measured, and Fresnel reflection ( It may be a method of measuring failure points or loss characteristics of an optical fiber by detecting fresnel reflections or Rayleigh scattered light in the optical fiber.

The OTDR measurement unit can measure the failure point of the optical fiber using the OTDR method.

The intrusion detection device of this example is for detecting the intrusion position of an outsider by using the failure point of the optical fiber output from the OTDR measuring unit connected to one optical fiber installed in a plurality of fences located in the intrusion detection area.

Next, with reference to FIG. 1, the intrusion detection device 10 of this example will be described in detail.

1, the intrusion detection device 10 is connected to a plurality of fences 11-14 installed in the guard area, an optical fiber 20 installed in a plurality of fences 11-14, and an optical fiber 20, In the OTDR measurement unit 30, the intrusion position determination unit 40 connected to the OTDR measurement unit 30, the optical fiber installation database 50 and the intrusion position determination unit 40 connected to the intrusion position determination unit 40 A connected information output unit 60 may be provided.

Each fence 11-14 may include a plurality of poles 101 and a fence line 201 provided between the poles 101, as shown in FIG. 2 shown as an example. At this time, all of the poles 101 are given unique identification numbers, so if the unique identification number of the poles 101 is known, which fence 11-14 belongs to can be known.

According to the location of the corresponding fence 11-14 of the optical fiber 20 installed in the fence 11-14, it may be installed in various forms. For example, as shown in FIG. 2 , the optical fiber 20 is installed on the corresponding pole 101 , and after being installed along the pole 101 , the optical fiber 20 is adjacent to the corresponding fence wire 201 along the extension direction of the fence wire 201 . It may be installed in a straight line or wound around the wire fence 201 in the form of a circle or a spiral.

For this reason, one optical fiber 20 may be installed in contact with or adjacent to the plurality of poles 101 and the plurality of fence lines 201 positioned in the plurality of fences 11-14. Accordingly, in this example, the installation information of the optical fiber 20 can be determined centering on these fences 11-14, the pole 101 and the fence wire 201.

The optical fiber installation database 50 may store installation information of the optical fiber installed in the fence 11-14.

For example, the optical fiber installation information stored in the optical fiber installation database 50 includes an identification number (ID) of each fence 11-14, a fence start length and a fence end for each identification number of each fence 11-14. At least one of a length, a pontoon start position and a pontoon end position, the number of optical fiber stages and an optical fiber installation start position, an optical fiber travel direction, and an optical fiber end length may be provided.

The fence start length may be the starting length of the optical fiber 20 installed in the corresponding fence (eg, 11 ), and the fence ending length may be the ending length of the optical fiber 20 installed in the corresponding fence 11 .

The starting position of the pontoon is the position of the pole at which the installation of the optical fiber 20 starts in the corresponding fence 11 (hereinafter, this pole is referred to as the 'installation start pole'), and the end position of the pontoon is the position of the optical fiber ( 20) may be the location of the pole at which the installation is finished (hereinafter, this pole is referred to as the 'installation termination pole'). In this example, the start position of the pontoon and the end position of the pontoon may be marked with a unique identification number of the corresponding pontoon.

The number of optical fiber stages may be the number of stages of optical fibers 20 that are continuously connected along the height direction between the installation start pole and the installation end pole of the fence 11 .

At this time, the optical fiber 20 is wound on the corresponding fence line installed in the plane direction between the poles 101 or located adjacent to the corresponding fence line, and the portion of the optical fiber 20 wound around one fence line 201 or located adjacently is the optical fiber ( 20) can be configured.

The optical fiber installation start position may be the position of the fence line where the optical fiber 20 installation starts in the corresponding fence 1 . The fence lines 201 installed to be spaced apart from each other in the height direction from the corresponding fence 11 may be assigned an identification number.

For example, the identification number of the fence line 201 located at the bottom of the fence 1 is No. 1, and the higher the position of the fence line 201 along the height direction, the higher the identification number of the fence line 201 is. can Therefore, when the total number of the fence lines 201 installed in the height direction between the two adjacent poles 101 is 40, the identification number of the fence wire 201 located at the lowest position is '1', and the fence line 201 located at the highest position is '1'. ) may be '40'.

The optical fiber traveling direction may refer to the traveling direction of the optical fiber 20 traveling along the height direction of the pole 101 when the optical fiber 20 is installed between the installation start pole and the installation end pole from the optical fiber installation start position. .

In this example, the optical fiber traveling direction may be divided into a descending order and an ascending order.

When the optical fiber traveling direction is in descending order, the optical fiber 20 is installed while descending from the optical fiber installation start position to the lower side (ie, toward the ground), and when the optical fiber traveling direction is ascending, the optical fiber 20 moves upward from the optical fiber installation start position. It can be installed while ascending (ie, toward the ground).

The length of the optical fiber stage may be the length of one stage of the optical fiber 20 .

Accordingly, when the length of the optical fiber is multiplied by the number of optical fiber stages, the total length of the optical fiber 20 installed in the fence 11 can be roughly calculated.

An example of a storage form of such an optical fiber installation database 50 is shown in Table 1 below. In [Table 1], all units of length may be meters (meter, m).

fence
number fence
start
length fence
end
length fiber optic
number of steps fiber optic
short length fiber optic
installation
starting position fiber optic
Progress
direction pontoon
start
location pontoon
end
location FTL One 1289 5893 36 127.9 75 Descending 36 One 4604 2 5893 6001 One 108.0 39 Descending 36 One 108 3 6006 6108 One 102.0 76 Descending One 36 102 4 6112 6238 One 126.0 38 Descending 36 One 126

According to [Table 1] above, in the fence (eg, the first fence 11) to which the identification number (ID) of '1' is assigned, the starting length of the optical fiber is 1289 m and the ending length of the optical fiber is 5893 m.

In addition, in the first fence 11 , the starting position of the pontoon and the ending position of the pontoon, which are the positions of the pole 101 where the optical fiber 20 is installed, are pole 36 and pole 1, respectively. Accordingly, it can be seen that the installation of the optical fiber 20 starts at the pole 101 to which the identification number 36 is assigned, and then ends at the pole 101 to which the identification number 1 is assigned.

According to [Table 1], since the number of optical fiber ends installed in the first fence 11 is 36, the optical fiber installation start position is 75, and the proceeding direction is in descending order, among the fence lines 201 installed in the first fence 11, 75 An optical fiber end may be installed in or adjacent to the 36 fences 201 sequentially positioned downward from the second fence line 201 .

For this reason, as shown in FIG. 2, in the case of the first fence 11, when the optical fiber 20 is installed in a straight line adjacent to the fence line 201 that is installed to be spaced apart along the height direction of the pole 101, the optical fiber ( 20) is first installed adjacent to the 75th fence line 201, and then descends adjacent to the corresponding fence line 201 toward the ground. Finally, the installation can be made adjacent to the 40th fence line 201.

Accordingly, the approximate length of the optical fiber 20 installed in the first fence 11, that is, the fence total optical fiber length (FTL) is 4604 m, and this length is the fence ending length (5893 m) - the fence starting length (1289) =4604.

In addition, in the fence (eg, the second fence 12) to which the identification number (ID) of '2' is assigned, the starting length of the optical fiber is 5893 m and the ending length of the optical fiber is 6001 m. In the case of the second fence 12, since the starting length of the optical fiber is the same as the ending length of the optical fiber of the first fence 11, it can be inferred that the second fence 11 and the second fence 12 are immediately adjacent.

Further, in the second fence 12 , the starting position and the ending position of the pontoon at which the optical fiber 20 is installed are the 36th pole 101 and the 1st pole 101 , respectively, which are the same as in the case of the first fence 11 . do.

Instead, since the number of optical fiber ends installed in the second fence 12 is one, the optical fiber installation start position is number 39, and the proceeding direction is in descending order, only the 39th fence line is adjacent to the fence line 201 installed in the second fence 12 . An optical fiber 20 may be installed.

As such, since only one stage of the optical fiber 20 is installed in the second fence 12 , the total fiber length FTL of the fence in the second fence 12 may be the same as the optical fiber stage length of 108.0 m.

In the fence (eg, the third fence 13) to which the identification number (ID) of '3' is assigned, the optical fiber start length is 6006 m, the optical fiber end length is 6108 m, and the optical fiber installation start position is 76.

Due to this, the optical fiber starting length of the fence 13 is about 4 m away from the optical fiber ending length of the second fence 12, and the optical fiber installation starting position increases from 39 to 76. Accordingly, the third fence 13 can be assumed to be installed above the second fence 12 .

Finally, since the optical fiber starting length of the fence (eg, the fourth fence 14) to which the identification number (ID) of '4' is assigned is 6112 m and the optical fiber ending length is 6238 m, the total optical fiber length (FTL) of the fence is 126 m ( =6238m-6112m).

The number of optical fiber stages of the fourth fence 14 is 1, that is, one stage, and the optical fiber installation start position in the fourth fence 14 may be the 38th fence line 201 . Accordingly, the length of the optical fiber required to install one optical fiber stage may be 126 m.

In this way, in this example, the optical fiber installation information for each fence 11-14 can be stored in the optical fiber installation database 50, so that the intrusion position determination unit 40 determines the optical fiber in each fence 11-14. You can check the installation status numerically.

The OTDR measurement unit 30, as already described, by using the OTDR method, the optical fiber length information at the point of failure of the optical fiber 20, for example, optical fiber information about the abnormal state of the optical fiber 20, such as a broken part or a bent part. may be output to the intrusion position determination unit 40 .

To this end, the OTDR measuring unit 30 includes a pulse generator that outputs a pulse signal, a light emitting diode that operates according to a pulse signal applied from the pulse generator and outputs an input optical signal that is input to the optical fiber 20, and the reflected light generated at the point of failure. A photodiode that detects and outputs a reflected optical signal, an optical switch that switches an optical path, and a control unit that compares the input optical signal with the reflected optical signal to determine the location of the faulty point and outputs it as optical fiber location information for the faulty point , a processor] and the like.

The intrusion position determination unit 40 made of a processor may store the length of the failure point optical fiber applied from the OTDR measurement unit 30 in a storage unit (not shown).

Therefore, the intrusion position determination unit 40 uses the optical fiber installation information of each fence 11-13 stored in the failure point optical fiber length information and the optical fiber installation database 50, any of the plurality of fences 11-14 It can be determined whether an obstacle has occurred in the fence, the part of the optical fiber 20 located at which end.

In this case, the storage unit may be a memory, and may be located inside or outside the intrusion location determination unit 40 to be connected to the intrusion location determination unit 40 .

Therefore, the intrusion position determination unit 40, among the data stored in the optical fiber installation database 50, using the fence start length and fence end length of each fence 11-14, the determined failure point optical fiber length information The location of the corresponding fence to which it belongs can be primarily determined.

As an example, if the determined failure point optical fiber length information is 1580m, referring to [Table 1], 1580m is between the fence start length (1289m) and the fence end length (5893m) of the first fence 11.

In this way, the intrusion position determining unit 40 is located between the determined failure point optical fiber length information 1580m is located between the fence start length and the fence end length of the first fence 11, the intrusion position determination unit 40 is the failure It may be determined that the point optical fiber length information belongs to the first fence 11 among the first to fourth fences 11-14.

Next, the intrusion position determination unit 40 may determine again which optical fiber end of the first fence 11 belongs to the determined failure point optical fiber length information.

To this end, the intrusion position determining unit 40 determines which optical fiber end of the first fence 11 corresponds to the fiber length information by using the fence start length, the optical fiber installation start position, the optical fiber end length and the optical fiber proceeding direction. can do.

In the case of the first fence 11, the fence start length is 1289 m, the length of one step is 127.9 m, the installation start position is the 75th fence line, and the optical fiber proceeding direction is in descending order, so 1580 m, the fiber length information at the point of failure, is the first. It can be seen that the first fence 11 belongs to the optical fiber end located at the third position toward the ground from the installation start position.

Accordingly, the intrusion position determining unit 40 is located in the 72nd fence line 201 located 3rd in the ground direction from the 75th fence line 201 where the installation start position is, or the optical fiber 20 located adjacent to the 72nd fence line 201. It can be determined that a fault has occurred in

In this way, the intrusion position determination unit 40 uses the fiber length information at the point of failure to first determine one of the plurality of fences, and then determines the end of the fiber within the selected fence again, and finally information on the length of the fiber at the point of failure. It is possible to determine the location of the fault point corresponding to

Next, when the failure point occurrence position corresponding to the failure point optical fiber length is determined, the intrusion position determining unit 40 may output information related to the failure point occurrence position determined by the information output unit 60 .

At this time, the information output to the information output unit 60 by the intrusion location determination unit 40 is the length of the failure point optical fiber (eg, 1580m), the fence and the optical fiber end (eg, the first 72nd fence line of one fence) and installation information of the selected fence 11 (eg, a pontoon start position and a pontoon end position). Some of these information may be omitted if necessary.

For this reason, the manager or security guard of the intrusion detection device 10 uses the information output to the information output unit 60 to quickly and accurately recognize the location of the failure point, which is the location where the intrusion of an outsider is suspected in the security area, and the corresponding A location check can be carried out quickly.

In this example, the information output unit 60 may include not only an information display device such as a liquid crystal display device or an organic light emitting display device, but also at least one warning device such as a buzzer or a warning lamp. Therefore, when equipped with a warning device, the intrusion location determination unit 40 may display the location of the fault point with the information display device and also operate the warning device to output a warning sound or turn on a warning lamp.

This intrusion detection device 10 is installed in the guard area as well as the first structure, which is at least one fence 11-14 installed in the guard area, and has a different shape or function than the first structure. It is possible to determine whether an outsider has invaded.

For example, as shown in FIG. 2 , the guard area includes a plurality of fences 11-14 as well as at least one first gate 15 (eg, a second structure) installed in the fence. and at least one second gate 16 (eg, a third structure) installed between the fences.

Accordingly, the optical fiber 20 constituting a part of the intrusion detection device 10 and having both ends connected to the intrusion position determining unit 40 is a plurality of fences 11-14 as well as the first and second installations. It may also be wound around the gates (15, 16).

Accordingly, in the case of the first gate 15 installed in the fence, the optical fiber 20 output after being installed in the fence (eg, 11) is installed in the corresponding position of the first gate 15 and then again the first fence ( 11) may be input to the first fence 11 to be installed in the remaining part.

On the other hand, in the case of the second gate 16 located between two adjacent fences (eg, 12 and 14), the optical fiber 20 is inputted to the second gate 16 after completing the installation in the corresponding fence 12, It is installed in the second gate 16 , and when the installation of the second gate 16 is completed, it is input to the other adjacent fence 14 , and installation in the corresponding fence 14 can be made.

As already described, the optical fiber 20 used in the intrusion detection device 10 of this example is a single optical fiber connected without interruption, and the first to fourth fences 11-14 and the first and second gates 15, 16) can be installed in the corresponding position without interruption.

At this time, the gates (15, 16) may be installed in the guard area to enable the position movement of the guard.

The size, installation position and number of these gates 15 and 16 may be changed as needed.

The gates 15 and 16 are provided with a frame and a plurality of fence lines installed in the frame, so that the space surrounded by the frame can be filled with the fence lines.

At this time, the iron fence installed in each of the gates 15 and 16 may have a plurality of stages spaced apart along the height direction of the frame.

In addition, a unique identification number may be assigned to each of the gates 15 and 16 .

Accordingly, the optical fiber 20 installed in each of the gates 15 and 16 may be positioned adjacent to or in contact with the frame and the fence line, and may also include a plurality of optical fiber ends spaced apart along the height direction of the frame.

In this case, in the optical fiber installation database 50, the installation information for the part of the optical fiber 20 installed in the first and second gates 15 and 16, which are structures added compared to FIG. 1, may be additionally stored in a predetermined form. have.

In this way, when the installation information for the first gate 15 and the second gate 16 is additionally stored in the optical fiber installation database 50, the identification number of the gate is stored in the fence number, and the fence start length and As the fence end length, the starting length and the ending length of the optical fiber 20 installed in the corresponding gates 15 and 16 may be stored.

Therefore, the intrusion position determination unit 40, in the same manner as already described, using the optical fiber installation database 40, using at least one point of failure optical fiber length information input from the OTDR measurement unit 30, at least one It can be determined in which optical fiber end of which structure the fence 11-14 and the at least one gate 15, 16 has a failure point.

In this way, when the intrusion detection device 10 according to the present example receives the length of the fiber at the point of failure from the OTDR measuring unit 30, the fiber with the point of failure is generated using the stored data of the fiber installation database 50 in which the fiber installation information is stored. The specific position of (20) can be quickly and accurately determined and outputted to the information output unit (60).

Therefore, the security guard can quickly find and check the corresponding location of the structure designated as the location of the obstacle.

That is, since the comparative example outputs only the optical fiber length information at the point of failure, the guard uses the length information of the fiber at the point of failure that is output from among a plurality of structures installed in the guard area. After guessing (eg, a fence) first, it was necessary to manually check the installation status of the optical fiber of the guessed structure. Therefore, it takes a lot of time and manpower to accurately check the location of the point of failure, and in some cases, the location of the point of failure may be misunderstood and cause a bigger problem.

However, the intrusion detection device 20 according to the present example determines the exact location of the structure where the failure point occurs and the specific location of the optical fiber in the structure, and informs the security guard.

Accordingly, the security guard can first check the position of the optical fiber located in the immediately determined structure without the need to check all structures installed in the security area.

For this reason, since the occurrence time and location of the failure point are quickly identified, it is possible to quickly determine whether an outsider has invaded and take necessary measures.

The technical features disclosed in each embodiment of the present invention are not limited only to the embodiment, and unless they are incompatible with each other, the technical features disclosed in each embodiment may be combined and applied to different embodiments.

In the above, embodiments of the present invention have been described. The present invention is not limited to the above-described embodiments and the accompanying drawings, and various modifications and variations will be possible from the point of view of those of ordinary skill in the art to which the present invention pertains. Accordingly, the scope of the present invention should be defined not only by the claims of the present specification, but also by those claims and their equivalents.

10: intrusion detection device 20: optical fiber
30: OTDR measurement unit 40: intrusion position determination unit
50: fiber installation database 60: information output section
101: pontoon 201: iron fence
15, 16: gate

Claims (5)

a plurality of fences installed adjacent to each other;
a first gate located in one of the plurality of fences and through which a guard moves;
a second gate located between two adjacent fences and through which the guards move;
One optical fiber connected to one without interruption and installed in each fence, the first gate and the second gate;
an optical fiber installation database storing installation information of the optical fibers installed in each of the plurality of fences;
an OTDR measuring unit connected to the optical fiber and generating and outputting fiber length information at a point of failure; and
Intrusion location determination unit connected to the OTDR measurement unit and the optical fiber installation database
including,
Each fence includes a plurality of poles that are spaced apart and a plurality of first fence lines positioned along the height direction of the poles between the adjacent poles,
The first gate and the second gate each include a frame and a plurality of second fence lines installed on the frame,
The one optical fiber is installed in contact with or adjacent to each pole and each first fence line, and includes a plurality of first optical fiber ends located adjacent to each other along the height direction of the pole and each frame of the first and second gates; It includes a plurality of second optical fiber ends located adjacent to or adjacent to each second fence line,
The installation information of the optical fiber includes the identification number of each fence, the starting length of the fence and the ending length of the fence, the starting position of the pole and the ending position of the pole, the number of optical fibers and the starting position of the optical fiber installation, the direction of the optical fiber, the length of the optical fiber, the first and the second Including identification information of the gate and the starting length and ending length of optical fibers installed in the first and second gates,
The intrusion position determination unit,
Using the fence start length, the fence end length, and the start and end lengths of the optical fibers installed in the first and second gates of each fence, the length of the failure point optical fiber among a plurality of fences, the first gate and the second gate is Select one fence or gate belonging to the selected fence or gate, and the length of the optical fiber within the selected fence or gate using the starting length of the fence or the starting length of the optical fiber, the optical fiber installation start position, the optical fiber end length and the optical fiber traveling direction. Determining which optical fiber end the information corresponds to
intrusion detection device. delete delete The method of claim 1,
It is connected to the intrusion detection determination unit and further includes an information output unit for outputting information on the length of the fiber at the point of failure, the selected fence and optical fiber end, and the pontoon start position and the pontoon end position of the selected fence under the control of the intrusion detection determination unit. an intrusion detection device. The method of claim 1,
The OTDR measurement unit,
a light emitting diode outputting an input optical signal to the optical fiber and a photodiode outputting a reflected optical signal by detecting reflected light generated at a failure point of the optical fiber; and
A control unit that compares the input optical signal and the reflected optical signal to generate the optical signal position information of the obstacle point
Intrusion detection device comprising a.

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