CN201413558Y - System for reducing false-alarm rate at entrance and exit of regional anti-intrusion system of fiber optic interferometer - Google Patents
System for reducing false-alarm rate at entrance and exit of regional anti-intrusion system of fiber optic interferometer Download PDFInfo
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- CN201413558Y CN201413558Y CN2009201567080U CN200920156708U CN201413558Y CN 201413558 Y CN201413558 Y CN 201413558Y CN 2009201567080 U CN2009201567080 U CN 2009201567080U CN 200920156708 U CN200920156708 U CN 200920156708U CN 201413558 Y CN201413558 Y CN 201413558Y
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Abstract
The utility model relates to a system for reducing the false-alarm rate at an entrance and an exit of a regional anti-intrusion system of a fiber optic interferometer. A defense area is independentlyconfigured at the access, and at least one integrated surround is formed at a protected area; the defense area is internally provided with a defense line which is parallel to the boundary or surrounded on a door of the access, and the defense line comprises the fiber optic interferometer; a transmission optical path I (16) connected with a light source module (15) is connected with an optical pathadapter (17) arranged at the head end; the optical path adapter (17) is divided into a number of paths which respectively correspond to a fiber optic interferometer sensor arm I (4) of the defense area and a fiber optic interferometer sensor arm II (5) of the defense line of the defense area at the access; after surrounding the protected area by a circle, the defense line enters the adapter (17)through a transmission optical path II (18) and is converted into an electrical signal through the transmission optical path I (16) to be processed. The defense area at the access is surrounded with an optical fiber sensor (11) at the side of each door, connected with the regional anti-intrusion system (8) by an optical cable and then connected with a password input keyboard (13) by a signal wire.
Description
Technical field
The utility model is the system that a kind of fibre optic interferometer region anti-intrusion system reduces the gateway false alarm rate, relates to the measurement of mechanical vibration, the measurement and the piping system technical field of impact.
Background technology
The safety precaution in zone all is an important problem all the time, and is such as military base, airport, armory, oil depot, oil and gas pipes station and residential quarters etc., most important to effective protection in these zones.
At present main regional intrusion defense technology have based on electricity and based on two big classes of light;
Technology based on electricity mainly contains high-voltage fence technology, leaky cable technology etc.On some important area border, be provided with high-voltage fence, can form deterrence to the invador to a certain extent, but there is poor stability in high-voltage fence, does not possess the interlink warning function; When using the leaky cable of radiation field to carry out intrusion detection, be subjected to forceful electric power magnetic environment such as thunder and lightning easily and disturb and the wrong report of increase system.
Technology based on light mainly contains intrusion detection technology of infrared ray correlation alarm technique, camera surveillance technology, imaging fiber intrusion detection technology and Fibre Optical Sensor etc.Wherein infrared correlation alarm technique mid-infrared laser bundle is difficult to accurately aim at the small target center of light-receiving device, especially when rainy day and haze weather, can make the laser beam direction of propagation produce deviation because of the refraction of rainwater, haze, will report to the police by initiating system when stopping the correlation approach if any barriers such as fallen leaves, toys during sunny weather, and make the invador very easily get around the correlation path because of not possessing certain disguise, cause alarm to lose efficacy; Also higher to the requirement of laying mode, generally be only applicable to short-range flat site.
The camera surveillance technology is the more a kind of intrusion detection pattern that adopts at present, and camera monitors owing to have the narrower visual field and particularly usually climbed up and in the blind area of camera rear flank face, and camera monitors and also usually is subjected to the influence of weather and lost efficacy.Imaging fiber intrusion detection technology be based on light wave in multimode optical fiber because the interference between the different transmission mode forms speckle, and speckle image changes with external disturbance, this mode is subjected to environmental impact easily and forms wrong report.
The intrusion detection technology of Fibre Optical Sensor has the microbending loss of measuring optical fiber, and this method sensitivity is low, be not suitable for the detection of dynamic event.
Also some is based on and interfere detects principle in the intrusion detection technology of Fibre Optical Sensor, as, " the optical-fiber security early-warning device " of China National Petroleum Corporation (CNPC) and China Petroleum Pipeline Bureau be utility model patent (ZL200620124262.X).Present interference technique scheme is single interferometer and single defence line, these schemes are subjected to environmental impact equally easily, some false invasion signals that environment causes are thought by mistake the gateway of invading and producing false-alarm, particularly anti-intrusion system, will produce very big false alarm rate.
The utility model content
The purpose of this utility model be design a kind of affected by environment little, false alarm rate is low reduces the system of gateway false alarm rate based on the fibre optic interferometer region anti-intrusion system.
The false alarm rate height that exists in view of above-mentioned a few class security and guard technologies, be subject to problem such as such environmental effects, overcome targetedly based on the region anti-intrusion system of fiber optic interferometric technology time, space characteristics in conjunction with disturbance event.
The improvement that improves the region anti-intrusion system of optical fiber vibration sensing sensitivity is to improve the induction sensitivity of interferometer to vibration signal by the space length that increases interferometer two pickup arms.
Region anti-intrusion system is by being subdivided into the border, protection zone the accurate location that intrusion event has been realized in a plurality of defence areas; simultaneously multiple defence line is set on the border, protection zone; the RST that detects according to different depths defence line; can accurately distinguish intrusion event and random perturbation incident, effectively reduce system's false-alarm that non-intrusion event causes.
Can be divided into main process equipment, transmission light path, light path adapter and interferometer light path on the region anti-intrusion system structure.When interferometer light path had detected disturbing signal and occurs, triggering system entered the state of alert, if continue to have disturbing signal to occur and its character symbol is incorporated into the behavioural characteristic pattern of invading, system produces and reports to the police.
Based on the formation of the region anti-intrusion system fibre optic interferometer of fibre optic interferometer as shown in figure 11, way routinely, in the periphery of protection zone a plurality of defence areas are set, and the protection zone formed at least one complete encirclement, a plurality of defence areas are through a series connection or a same complete encirclement that constitutes the protection zone in parallel; In each defence area, the defence line that is parallel to the border is all arranged, this defence line has the interval to separate on depth, and the defence line is made up of No. one fibre optic interferometer; The utility model is to dispose the defence area more separately in the gateway, and the protection zone is formed at least one complete encirclement; In the defence area, have to be parallel to the border or to enclose defence line on the door of gateway, being parallel to the defence line, border has on depth at interval and separates, and the defence line is made up of No. one fibre optic interferometer 2; Connect the light path adapter (17) of transmission light path I (16) the adaper end of light source module (15), be divided into the n road after light path adapter (17) beam splitting, correspond respectively to the fibre optic interferometer pickup arm I (4) in n defence area and defence line, defence area, gateway, the pickup arm II (5) of fibre optic interferometer; Each defence line once more enters adapter (17) through transmission light path II (18) around the protection zone after one week, handles through being converted to electric signal behind the transmission light path I (16).
The light that the light source module 15 of system sends arrives light path adapter 17 through transmission light path I 16, through being divided into the n road after 17 beam splitting of light path adapter, corresponds respectively to n defence area; The defence line light path is a fibre optic interferometer 2 in each defence area; light signal is passed back through behind each defence area inner fiber interferometer 2; the flashlight that forms in the defence area, front only is transmission when passing through follow-up defence area; once more enter adapter 17 through transmission light path II 18 around the protection zone after one week, handle through being converted to electric signal behind the transmission light path I 16.
The utility model is for reducing the normal system's false-alarm that causes of coming in and going out in regional gateway to the defence area of configuration separately, regional gateway, be to be equipped with cipher switch (see figure 10), the intrusion alarm function in defence area, temporary close gateway when making things convenient for the authorized person to come in and go out the protection zone in the gateway; Cipher switch is to enclose Fibre Optical Sensor 11 backs to connect region anti-intrusion system 8 by optical cable on every fan door limit at gate, connects cipher inputting keyboard 13 by region anti-intrusion system 8 through signal wire again; Cipher inputting keyboard 13 is installed in the gateway, and is connected to region anti-intrusion system 8 with signal wire, the input password can temporarily be removed the warning function in defence area, gateway, and the authorized person recovers to put into the warning function of the system of invading by the back;
Fibre optic interferometer wherein is the mixing use-pattern or the plug lattice nanogram interferometer of Michelson interferometer or Mach-Zehnder interferometer or Michelson interferometer and Mach-Zehnder interferometer;
The concrete structure of fibre optic interferometer is:
The structure of each fibre optic interferometer 2 in the defence area that the gateway disposes separately: in each defence area, the sub-cable of sensing can be the responsive structure (see figure 1) of full section when multipath interference instrument light path was laid, from female cable 1, tell fibre optic interferometer 2, then enter female cable 1 and pass back by Transmission Fibers 3; Also can be through beginning to be provided with interferometer again after the certain distance transmission in the sub-cable of transmission; One fibre optic interferometer 2 can be arranged on when multiple tracks fibre optic interferometer 2 is provided with in the female cable of transmission, from female cable 1, tell fibre optic interferometer 2, then enter female cable 1 and pass (see figure 2) back through Transmission Fibers 3; Also can the per pass defence line all corresponding to a sub-cable of sensing; From female cable 1, tell fibre optic interferometer 2 and be provided with, then enter female cable 1 and pass back through Transmission Fibers 3; The structure of each fibre optic interferometer 2 is that the pickup arm I 4 of fibre optic interferometer, the pickup arm II 5 of fibre optic interferometer are arranged in the interior identical or different beam tube of an optical cable; Or the pickup arm I 4 of fibre optic interferometer, the pickup arm II 5 of fibre optic interferometer be arranged in the different optical cables; These two pickup arms optical cable at place respectively spatially are adjacent or intersect or separate; Adjacent is form (see figure 4) or twisted-pair feeder form (see figure 5) side by side; Intersection is that two optical cables interweave and constitute the version (see figure 6) of fishing net shape; Separate and be meant that two optical cables are parallel and install, have spaced mounting means (see figure 7) between two optical cables;
The light channel structure of each fibre optic interferometer 2: be that linear pattern or arc line type are installed, or S type curve is installed perhaps spiral line type curve installation, the mixed form of perhaps above-mentioned several situations;
Wherein:
Linear pattern and arc line type are installed and are meant that fibre optic interferometer 2 is arranged to straight line or camber line according to the zone boundary feature;
S type curve (see figure 8) is meant that fibre optic interferometer 2 is according to the form installation around S type curve;
Spiral line type curve (see figure 9) is meant a kind of mode that fibre optic interferometer 2 is installed along the spiral line type curve, and this helix is plane curve or space multistory curve;
Wherein S type and spiral line type curve are installed and are subjected to the pickup arm length of vibration effect longer, and the phase differential of generation is also bigger, therefore also have higher vibration detecting sensitivity;
The structure of multiple defence line is: on the depth direction of border, multiple tracks fibre optic interferometer 2 is set respectively; Multiple tracks fibre optic interferometer 2 is separately positioned on the both sides and border on border; Be arranged in the inboard on border subsurface or directly exposed on the ground, in the arranged outside on border at subsurface; Type and feature on the border on the border are decided, and for the gateway, are nothing but motor-driven folding door and a conventional fan or two fan revolving doors; To motor-driven folding door, fibre optic interferometer 2 is installed on the whole outward flange of folding door, and the fibre optic interferometer 2 on both sides also can be together folding thereupon up and down to be installed in door certainly; To a fan or the two fan revolving doors of routine, four frames that fibre optic interferometer 2 is installed in revolving door get final product.
Dispose the size in defence area separately with different according to the gateway to the accuracy requirement of intrusion alarm positional information; the zone boundary that region anti-intrusion system will be protected is subdivided into minimum one or more defence area; in this defence area, all carry out the setting of fibre optic interferometer 2 according to above-mentioned light path set-up mode; system produces the state of alert when fibre optic interferometer 2 detects doubtful invasion signal; and set state of alert perdurability of certain-length in time, produce when comprehensive characteristics in alert time, occurring and meeting the intrusion behavior feature and report to the police.The intrusion behavior to the protection zone can be effectively judged in the comprehensive judgement in this binding time and space; reduction system false alarm rate; in addition the geographic position that can accurately draw the invasion generation area is segmented on the border of protection zone, be easy to realize interlock with other system.
The intrusion event detection is realized based on the sensing to vibration in the gateway region anti-intrusion system of configuration separately, because geological condition is complicated and changeable, differently the attenuation by absorption of confrontation vibration is widely different, for the adaptability of increase system to different geologic conditions, the utility model proposes a kind of different spaces and reach the system that the gateway is provided with the defence area separately apart from two pickup arms of interval laying optical fiber interferometer, this system can form different vibration signal detection sensitivitys, fibre optic interferometer two arm space intervals are big more, and formed vibration signal detection sensitivity is high more; And prevented gateway, defence area wrong report problem.
From the technical scheme of said system and principle of work as can be seen, the independent configuring area anti-intrusion system in a kind of gateway based on the fiber optic interferometric technology that the utility model proposes reduces the system of gateway false alarm rate, not only can realize the accurate location of intrusion event, also because of multiple defence line being set on border, protection zone, gateway, the RST that detects according to different depths defence line, can accurately distinguish intrusion event and random perturbation incident, effectively reduce system's false-alarm that non-intrusion event causes; Adopted the system that reduces the gateway false alarm rate simultaneously, make total system have highly sensitive, be not subjected to factor affecting such as temperature, weather, anti-environmental interference ability is strong, the advantage that false alarm rate is low is with a wide range of applications.
Description of drawings
The responsive synoptic diagram of the full section of Fig. 1 cable
One fibre optic interferometer of Fig. 2 is arranged on female cable synoptic diagram
Fig. 3 begins to be provided with the fibre optic interferometer synoptic diagram transmit certain distance in sub-cable after
Fig. 4 lays the mode synoptic diagram side by side
Fig. 5 twisted-pair feeder is laid the mode synoptic diagram
Fig. 6 fishing net shape mesh is laid the mode synoptic diagram
Fig. 7 laying mode synoptic diagram that walks abreast
Fig. 8 S molded lines fibre optic interferometer is laid the mode synoptic diagram
Fig. 9 helix fibre optic interferometer is laid the mode synoptic diagram
Defence area, gateway, Figure 10 cipher switch zone synoptic diagram
Figure 11 region anti-intrusion system theory diagram
The female cable 2-of 1-fibre optic interferometer wherein
The pickup arm I of 3-Transmission Fibers 4-fibre optic interferometer
The pickup arm II 6-telepilot of 5-fibre optic interferometer
7-remote control signal receiver 8-region anti-intrusion system
9-signal wire 10-optical cable
11-Fibre Optical Sensor 12-enclosure wall
13-cipher inputting keyboard 14-code keypad signal wire
15-light source module 16-transmission light path I
17-light path adapter 18-transmission light path II
19-protection zone 20-sensing light path
21-detector array 22-signal processor
The 23-alarm unit
Embodiment
In conjunction with the accompanying drawings and embodiments the utility model is further specified, but should not limit protection domain of the present utility model with this.
Embodiment. the formation of the overall system that this is routine comprises as shown in figure 11: main process equipment, transmission light path, light path adapter and sensing light path.Main process equipment partly comprises: light source module 15, detector array 21, signal processor 22, alarm unit 23.The sensing light path is a fibre optic interferometer.
Light source module 15 connects light path adapter 17 by transmission light path I 16; 17 outputs of light path adapter are connected each defence area of sensing light path by transmission light path II 18; the sensing light path takes back light path adapter 17 through transmission light path II 18 around the protection zone after one week once more; light path adapter 17 connects detector array 21 light input ends by transmission light path I 16; detector array 21 output termination signal processors 22 input ends, signal processor 22 outputs unit 23 taking alarm.
At first carry out defence area quantity, the design of defence line quantity according to the provincial characteristics that will protect and customer requirements, the zone of protection, 5 defence areas, defence line, two roads are set, in each defence area, the twice defence line that is parallel to the border is all arranged, this twice defence line is spaced apart on depth, the per pass defence line is made up of one road Mach-Zehnder interferometer, optical cable adopts the common communications optical cable, and mounting means is for to be provided with pickup arm and reference arm in same optical cable, and the laying mode is taken as linear pattern; The light that light source module 15 sends arrives light path adapter 17 through transmission light path I 16; through passing to different defence areas respectively after the different beam splitting of light path adapter 17 formation; the defence line; the defence line light path design is the interfere type light path in the defence area; every road light signal all only enters interferometer light path one time; the outer part of interferometer light path is transmission; light signal centers on the protection zone after one week; enter light path adapter 17 once more through transmission light path II 18 at last; and then be transferred to detector array 21 through transmission light path I 16; be converted to and be transferred to signal processor 22 behind the electric signal and handle, produce and report to the police when the signal characteristic that detects possesses when the intrusion event feature is arranged alarm unit 23.
Wherein:
Light path adapter 17 selects 1 * n beam splitter;
Light source 15 selects Distributed Feedback Laser;
Photodetector array 21 selects OPC380;
Signal processor 22 selects TMS320C6713;
Alarm unit 23 selects the YBT59-225 loudspeaker.
Regional gateway is normal comes in and goes out system's false-alarm of causing and to the defence area of configuration separately, regional gateway, is to be equipped with cipher switch (see figure 10), the intrusion alarm function in defence area, temporary close gateway when making things convenient for the authorized person to come in and go out the protection zone in the gateway and reduce; Cipher switch is to connect region anti-intrusion system 8 by optical cable after enclosing fibre optic interferometer on every fan door limit at gate, connects cipher inputting keyboard 13 by region anti-intrusion system 8 through signal wire again; Cipher inputting keyboard 13 is installed in the gateway, and is connected to region anti-intrusion system 8 with signal wire, the input password can temporarily be removed the warning function in defence area, gateway, and the authorized person recovers to put into the warning function of the system of invading by the back.
This example is through test of many times; in sensing light path zone; if when having the invasion disturbance; can cause that the phase differential between two pickup arms changes; and then formation interference signal; by signal processor interference signal is analyzed; the suspicious disturbance event feature in border, protection zone is differentiated; if system produced and reports to the police when signal characteristic met the intrusion behavior feature mode; when if signal characteristic does not conform to the intrusion behavior feature mode; system will not report to the police, and not only realizes the detection of regional intrusion event but also effectively reduces false alarm rate with this system.Normal discrepancy regional gateway personnel is then permitted because of being provided with the defence area separately and having to come in and go out, and just can not produce false-alarm, has got rid of the possibility that produces false-alarm, greatly reduces the false alarm rate of system.
Claims (7)
1. a fibre optic interferometer region anti-intrusion system reduces the system of gateway false alarm rate, the periphery that is included in the protection zone is provided with a plurality of defence areas, and the protection zone formed at least one complete encirclement, a plurality of defence areas are through a series connection or a same complete encirclement that constitutes the protection zone in parallel; In each defence area, the defence line that is parallel to the border is all arranged, this defence line has the interval to separate on depth, and the defence line is made up of No. one fibre optic interferometer; It is characterized in that in the gateway disposing separately again the defence area, and the protection zone is formed at least one complete encirclement; In the defence area, have to be parallel to the border or to enclose defence line on the door of gateway, being parallel to the defence line, border has on depth at interval and separates, and the defence line is made up of No. one fibre optic interferometer (2); Connect the light path adapter (17) of transmission light path I (16) the adaper end of light source module (15), be divided into the n road after light path adapter (17) beam splitting, correspond respectively to the fibre optic interferometer pickup arm I (4) in n defence area and defence line, defence area, gateway, the pickup arm II (5) of fibre optic interferometer; Each defence line once more enters adapter (17) through transmission light path II (18) around the protection zone after one week, handles through being converted to electric signal behind the transmission light path I (16);
The light that light source module (15) sends arrives light path adapter (17) through transmission light path I (16); through being divided into the n road after light path adapter (17) beam splitting; correspond respectively to the fibre optic interferometer in n defence area; light signal is passed back through behind each defence area inner fiber interferometer (2); the flashlight that forms in the defence area, front only is transmission when passing through follow-up defence area; once more enter adapter (17) through transmission light path II (18) around the protection zone after one week, handle through being converted to electric signal behind the transmission light path I (16).
2. a kind of fibre optic interferometer region anti-intrusion system according to claim 1 reduces the system of gateway false alarm rate, it is characterized in that mixing use-pattern or the plug lattice nanogram interferometer of described fibre optic interferometer (2) for Michelson interferometer or Mach-Zehnder interferometer or Michelson interferometer and Mach-Zehnder interferometer.
3. a kind of fibre optic interferometer region anti-intrusion system according to claim 1 and 2 reduces the system of gateway false alarm rate, it is characterized in that the pickup arm I (4) of described fibre optic interferometer, the pickup arm II (5) of fibre optic interferometer are arranged in the interior identical or different beam tube of an optical cable; Or interferometer two arms are arranged in the different optical cables; These two optical cables are spatially for adjacent or intersect or to a certain degree separation arranged; Adjacent is form or twisted-pair feeder form side by side; Intersection is the interweave versions of the mesh that constitutes the fishing net shape of two optical cables; Have to a certain degree to separate to be meant the parallel setting of two optical cables, have a distance setting at interval between two optical cables.
4. a kind of fibre optic interferometer region anti-intrusion system according to claim 3 reduces the system of gateway false alarm rate, it is characterized in that described fibre optic interferometer light path is that linear pattern or arc line type are laid or S type curve is laid or the spiral line type curve is laid or several mixed forms.
5. a kind of fibre optic interferometer region anti-intrusion system according to claim 1 reduces the system of gateway false alarm rate, the structure that it is characterized in that the multiple defence line that defence area, described gateway is provided with is on the depth direction of border, and one or multi-channel fibre optic interferometer (2) is set respectively; Multiple tracks fibre optic interferometer (2) is separately positioned on the both sides and border on border; Be arranged in the inboard on border subsurface or directly exposed on the ground, in the arranged outside on border at subsurface; Type and feature on the border on the border are decided, and to motor-driven folding door, fibre optic interferometer (2) is installed on the whole outward flange of folding door, and the fibre optic interferometer (2) on both sides also can be together folding thereupon up and down to be installed in door certainly; To a fan or the two fan revolving doors of routine, four frames that fibre optic interferometer (2) is installed in revolving door get final product.
6. a kind of fibre optic interferometer region anti-intrusion system according to claim 5 reduces the system of gateway false alarm rate, it is characterized in that in the defence area, gateway, multiple tracks fibre optic interferometer (2) when being provided with the sub-cable of sensing be the responsive structure of full section, from female cable (1), tell fibre optic interferometer (2) setting, then enter female cable (1) and pass back through Transmission Fibers (3); Or in the sub-cable of sensing, begin to be provided with fibre optic interferometer (2) again after the transmission of process certain distance; Multiple tracks fibre optic interferometer (2) can be arranged on one fibre optic interferometer (2) when being provided with in the female cable of transmission, tells fibre optic interferometer (2) from female cable (1), then enters female cable (1) and passes back through Transmission Fibers (3); Or the per pass defence line tells fibre optic interferometer (2) all corresponding to a sub-cable of sensing from female cable (1), then enters female cable (1) and passes back through Transmission Fibers (3).
7. a kind of fibre optic interferometer region anti-intrusion system according to claim 1 reduces the system of gateway false alarm rate, it is characterized in that the defence area that described gateway disposes separately is to enclose Fibre Optical Sensor (11) back to connect region anti-intrusion system (8) by optical cable on every fan door limit at gate, gateway, connect cipher inputting keyboard (13) by region anti-intrusion system (8) through signal wire again.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964699A (en) * | 2015-05-22 | 2015-10-07 | 北京交通大学 | Disturbance determining method and apparatus based on phi-OTDR fiber distributed type disturbance sensor |
| CN106023499A (en) * | 2016-04-28 | 2016-10-12 | 北京北邮国安技术股份有限公司 | Fiber security signal dual identification method and system |
| CN107689127A (en) * | 2017-08-17 | 2018-02-13 | 北京北邮国安技术股份有限公司 | With the adaptive dual recognition methods of optical fiber security signal for adjusting ginseng function and system |
-
2009
- 2009-05-31 CN CN2009201567080U patent/CN201413558Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964699A (en) * | 2015-05-22 | 2015-10-07 | 北京交通大学 | Disturbance determining method and apparatus based on phi-OTDR fiber distributed type disturbance sensor |
| CN106023499A (en) * | 2016-04-28 | 2016-10-12 | 北京北邮国安技术股份有限公司 | Fiber security signal dual identification method and system |
| CN107689127A (en) * | 2017-08-17 | 2018-02-13 | 北京北邮国安技术股份有限公司 | With the adaptive dual recognition methods of optical fiber security signal for adjusting ginseng function and system |
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Granted publication date: 20100224 Termination date: 20150531 |
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