CN202600875U - Defence-area optical fiber perimeter protection pre-warning system - Google Patents
Defence-area optical fiber perimeter protection pre-warning system Download PDFInfo
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- CN202600875U CN202600875U CN 201220197131 CN201220197131U CN202600875U CN 202600875 U CN202600875 U CN 202600875U CN 201220197131 CN201220197131 CN 201220197131 CN 201220197131 U CN201220197131 U CN 201220197131U CN 202600875 U CN202600875 U CN 202600875U
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Abstract
The utility model relates to a defence-area optical fiber perimeter protection pre-warning system, relating to the field of the technology for measuring mechanical vibration and impact and piping system. A system monitoring host (1) connects each defence-area unit (2) in series through two common transmission optical fibers I (3) and a transmission optical fiber II (4); the length of each defence area is set as 500m, 100m or 200m according to the requirement of safety protection; the number of the defence areas are set randomly and the maximum number of the defence areas is 100; each defence area is formed by four optical fibers; a no.5 optical fiber and a no.6 optical fiber form a sensing arm; a no.7 optical fiber and a no.8 optical fiber form a transmission arm; the no.5 optical fiber and the no.6 optical fiber are connected in parallel, and two ends are respectively connected with an optical fiber coupler I (9) and an optical fiber coupler II (10); the other end of the optical fiber coupler I (9) is connected with the no.8 optical fiber; and the other end of the optical fiber coupler II (10) is connected with the no.7 optical fiber. The defence-area optical fiber perimeter protection pre-warning system has the advantages of having high positioning accuracy, accurately determining the position, being able to be used in short-distance perimeter defence, being simple in construction, and being low in cost.
Description
Technical field
The utility model is that a kind of defence area formula optical fiber perimeter is taken precautions against early warning system.Relate to the measurement of mechanical vibration, the measurement and the piping system technical field of impact.
Background technology
Common security precautions technology has the active infrared correlation, passive infrared detection, digital microwave, vibration wireline, vibration optical cable, intelligent video etc. at present.Through years of development, these technology are mature on the whole, and at target of military importance, bank, museum, high-grade sub-district, occasions such as oil-gas stations field are applied, and have promoted these regional Prevention-Security levels.Because technical merit, cost reach the existence of answering reciprocity problem, these safety method technology basically all adopt the mode in defence area to deploy troops on garrison duty.Each defence area is arrived between the hundreds of rice tens, deploys troops on garrison duty continuously, thus the circumference safety precaution of realization main facilities.
The optical fiber perimeter early warning can be laid by corner owing to use optical cable, is adapted at irregular circumference and lays.The optical fiber perimeter early warning system of using at present both at home and abroad is based on the development of multimode optical fiber intermode interference principle more, and this method all is that the defence area formula is laid usually, only monitors delocalization.And need to divide the defence area to install, lay communication and power cable in addition.The installation cost is higher relatively.
Present pipeline optical fiber early warning technology mainly adopts the Mach-Zehnder interference to carry out, and is fit to long distance monitoring.For station such short distance monitoring, exist cost high, the location is inaccurate.Can't be applied to the perimeter protection of important area.
" optical technology " the 34th the 2nd phase of volume " full optical fiber perimeter security system " discloses a kind of full optical fiber perimeter security system, can carry out the circumference safety precaution in defence area, but can not carry out the circumference safety precaution in many defence areas.
The utility model content
The purpose of the utility model is the defence area formula optical fiber perimeter strick precaution early warning system that a kind of bearing accuracy of design is high, accurately definite position, short distance circumference use in defending, construction is simple, cost is low.
The utility model provides the predispersed fiber alarm system of a kind of defence area formula, can realize the real-time monitoring and the warning of invading to external world.System monitoring main frame 1 is together in series each unit, defence area 2 with Transmission Fibers II4 through two normal transmission optical fiber 3, and is as shown in Figure 1.The length in each defence area can be 50 meters, 100 meters or 200 meters according to the requirement setting of safety precaution.The number in defence area is provided with arbitrarily as required, and maximum can reach 100.
Wherein the implementation method in single defence area is as shown in Figure 2.
Each defence area is made up of 4 optical fiber, and No. 5 optical fiber and No. 6 optical fiber constitute pickup arm, and No. 7 optical fiber and No. 8 optical fiber are transfer arm.No. 5 optical fiber and No. 6 optical fiber parallel connections, two ends respectively meet fiber coupler I9 and fiber coupler II10, No. 8 optical fiber of another termination of fiber coupler I9, No. 7 optical fiber of another termination of fiber coupler II10.The direction of propagation of light is to get into from No. 7 optical fiber, and quilt is propagated in No. 5 optical fiber and No. 6 optical fiber respectively for two-beam at fiber coupler II10 place, is synthesized at fiber coupler I9 and a branch ofly in No. 8 optical fiber, propagates.Wherein fiber coupler I9 and fiber coupler II10 are 1: 1 equal somatotype coupling mechanism of splitting ratio.When external disturbance, the light signal phase place of propagating in No. 5 optical fiber of two pickup arms and No. 6 optical fiber is changed, and through interfering behind the coupling mechanism I9, the light of propagating in No. 8 optical fiber is the light signal after interfering.Can know that according to interference theory the light signal strength that interferes changes, just can judge through monitoring and demodulation intensity variations whether this defence area has disturbance to take place.
The fiber port I16 that when system deploys troops on garrison duty system monitoring main frame 1 is drawn links to each other with Transmission Fibers II4 with Transmission Fibers I3 with fiber port II17.Then through non-fiber coupler I18 and non-No. 7 optical fiber and No. 8 optical fiber welding (see figure 4) mutually of dividing equally fiber coupler II19 with defence area 2 divided equally.
The main machine structure that signal is carried out demodulation is as shown in Figure 3.System is by light source S11, and acousto-optic modulator AOM12 and photoelectric detector D13, modulus converter A/D 14, signal Processing computer PC 15 are formed.
The laser that light source S11 sends is received by acousto-optic modulator 12; Acousto-optic modulator 12 outputs connect fiber port 16; Fiber port I16 meets fiber port II17, and fiber port II17 output is connected in series photoelectric detector D13, modulus converter A/D 14, signal Processing computer PC 15 successively.
The laser that light source S11 sends is modulated into pulsed light through acousto-optic modulator 12, gets into fiber port I16.Pass the light of monitoring host computer 1 back from fiber port II17; After photodetector D13 is converted into electric signal by perception, be converted into the manageable digital signal of computing machine at analog-to-digital conversion device A/D14, signal Processing computer PC 15 is carried out intellectual analysis and processing with the disturbing signal that collects.Judge whether each defence area has the invasion signal, and alarm indication in time.
The utility model is applicable to the security protection of continuous arbitrarily circumference, is particularly suitable for out-of-shape, has occasion explosion-proof, the lightning protection requirement.This equipment can be realized the composite protective of field, pipeline station circumference simultaneously, has ensured the validity of circumference security protection.The application of this utility model will provide a cover economic, easy technological means for the security protection of field, pipeline station, use an optical cable to realize many defence areas, when avoiding the field, station to install, and the secondary excavation during cabling.
The utility model has solved various defence areas formula circumference source of early warning, need lay communication and power cable in addition, accomplishes equipment network, realizes the problem that construction is complicated, cost is high that Centralized Monitoring, concentrated alarm brought.
The utility model has been realized realizing the real-time monitoring in a plurality of defence areas through a cover watch-dog through time division multiplex, has been realized circumference safety precaution cheaply.
It is inaccurate that the utility model has solved traditional fiber early warning technology short distance location, the problem that can't divide the defence area to be provided with.Utilize time-division multiplex technology to use an optical cable to realize the circumference security protection in many defence areas.Solve traditional security and guard technology and need set up the problem of communication, electric power system, effectively reduced the cost of installing and using of equipment.
The utility model adopts full optic cable design, has no electronic component on the circumference, and intrinsic lightning protection, explosion-proof can be applied to oil-gas stations field, oil depot.Efficiently solve the coarse problem in location that exists in the long-distance optical fiber early warning technology application process,, effectively the disturbance location is limited in the defence area through adopting the mode in defence area.This invention is simultaneously carried out sensing based on the optical fiber mode; Realized the security protection of critical facility circumference through a multicore single mode optical cable, signal transmission and sensing are all carried out through optical fiber, need not extra power supply; Wiring is convenient, and having solved traditional perimeter protection equipment need be with ditch communication and electric power system problem.With the anti-invasion compared with techniques of traditional vibration wireline, this technology is installed simple, and maintenance workload is little.Compare with various correlation modes, this method good environmental adaptability does not receive the influence of misty rain and flue dust.
Description of drawings
Fig. 1 defence area formula predispersed fiber alarm system structural drawing
Fig. 2 defence area cell schematics
Fig. 3 monitoring host computer structural drawing
Fig. 4 defence area is connected synoptic diagram with main frame
Unit, 1-monitoring host computer 2-defence area wherein
3-Transmission Fibers I 4-Transmission Fibers II
5-5 optical fiber 6-6 optical fiber
7-7 optical fiber 8-8 optical fiber
9-fiber coupler I 10-fiber coupler II
11-light source S 12-acousto-optic modulator AOM
13-photoelectric detector D 14-modulus converter A/D
15-signal Processing computer PC 16-fiber port I
17-fiber port II 18-fiber coupler I
19-fiber coupler II
Embodiment
Embodiment. this example is taken precautions against early warning system for the test optical fiber perimeter.System monitoring main frame 1 is together in series each unit, defence area 2 through two normal transmission optical fiber I3 and Transmission Fibers II4, and is as shown in Figure 1.The length in each defence area can be set at 50 meters according to the requirement of safety precaution.
In process of the test, light source S11 selects narrow linewidth laser, and AOM12 is modulated to pulsed light through acousto-optic modulator, and the pulsewidth of pulsed light is 10ns, and the recurrent interval is 1s.The light that laser instrument sends gets into Transmission Fibers II4 from fiber port 16, and the place of setting up the defence area at needs is through non-equal branch/coupler and defence area 2 welding mutually.Laser gets into anti-sound zone system from No. 8 optical fiber, gets into optical fiber No. 7 after interfering through No. 5 optical fiber of light channel structure in the defence area and No. 6 optical fiber.No. 7 optical fiber and Transmission Fibers I3 be through non-equal branch/coupler I18 welding mutually, through fiber port II17 the light of Transmission Fibers I3 inserted monitoring host computer 1.In monitoring host computer 1, photodetector D13 converts the light signal that collects into electric signal, is converted into digital signal at modulus converter A/D 14 and sends into signal Processing computer PC 15 and handle.
When the external world had intrusion behavior to take place, the fiber phase of propagating in No. 5 optical fiber in the defence area, No. 6 optical fiber changed.If the length in defence area is 50m, then the signal development of each defence area passback monitoring host computer 1 is about 0.5 * 10 for the time of light propagation 100m
-6S.That is to say that every microsecond receives the pulse signal in two defence areas, the system design sampling rate is 4M, thereby the assurance system can gather the pilot signal of each defence area passback accurately.When the interchange light intensity of certain defence area return path signal changed, system thought that promptly intrusion behavior takes place in this defence area, in time reports to the police.
On deploying troops on garrison duty in the defence area, system adopts 4 core optical cables to constitute, and wherein two cores are as Transmission Fibers, the effect of Transmission Fibers 3 and Transmission Fibers 4 in its synoptic diagram.Other two fibres; 1 * 2 fiber coupler I9 and 1 * 2 fiber coupler II10 that divide equally in per 50 meters uses carry out a welding; Then with 1 end and two non-equal branch/coupler I18, non-equal branch/coupler II19 and two core Transmission Fibers weldings mutually of 1 * 2 coupling mechanism; Here the coupling ratio of lack of balance coupling mechanism is 5%, has only 5% light to get in the defence area.Last defence area directly with Transmission Fibers I3 and Transmission Fibers II4 welding mutually.Because coupling ratio fixes, so the maximum quantity in defence area is about 20, calculates the scope that can protect 1000m approximately according to each defence area 50m.If single anti-section length is 100 meters, then can protect length is 2000m.When single anti-section length was 200m, can protect length was the security protection requirement that 4000m can satisfy large-scale circumference basically.Improve protection length if desired, can be through reducing the mode of coupling ratio, the quantity that improves the defence area realizes.
Claims (3)
1. a defence area formula optical fiber perimeter is taken precautions against early warning system, it is characterized in that system monitoring main frame (1) is together in series each unit, defence area (2) through two normal transmission optical fiber I (3) and Transmission Fibers II (4); The length in each defence area is set at 50 meters, 100 meters or 200 meters according to the requirement of safety precaution; The number in defence area is provided with arbitrarily, and maximum is set to 100;
Wherein each defence area is made up of 4 optical fiber, and No. 5 optical fiber and No. 6 optical fiber constitute pickup arm, and No. 7 optical fiber and No. 8 optical fiber are transfer arm; No. 5 optical fiber and No. 6 optical fiber parallel connections, two ends respectively meet fiber coupler I (9) and fiber coupler II (10), No. 8 optical fiber of another termination of fiber coupler I (9), No. 7 optical fiber of another termination of fiber coupler II (10);
The direction of propagation of light is to get into from No. 7 optical fiber, locates in No. 5 optical fiber and No. 6 optical fiber, to be propagated respectively for two-beam at fiber coupler II (10), is synthesized at fiber coupler I (9) and a branch ofly in No. 8 optical fiber, propagates; Wherein fiber coupler I (9) and fiber coupler II (10) are 1: 1 equal somatotype coupling mechanism of splitting ratio; When external disturbance; The light signal phase place of propagating in No. 5 optical fiber of two pickup arms and No. 6 optical fiber is changed; Through interfering behind the coupling mechanism I (9), the light of propagating in No. 8 optical fiber is the light signal after interfering, and judges through monitoring and demodulation intensity variations whether this defence area has the disturbance generation.
2. a kind of defence area according to claim 1 formula optical fiber perimeter is taken precautions against early warning system, it is characterized in that the fiber port I (16) that when system deploys troops on garrison duty system monitoring main frame (1) is drawn links to each other with Transmission Fibers II (4) with Transmission Fibers I (3) with fiber port II (17); Then through non-fiber coupler I (18) and non-No. 7 optical fiber and No. 8 optical fiber weldings mutually of dividing equally fiber coupler II (19) with defence area (2) divided equally.
3. a kind of defence area according to claim 1 formula optical fiber perimeter is taken precautions against early warning system; The main frame that it is characterized in that the signal demodulation is by light source S (11), and acousto-optic modulator AOM (12) and photoelectric detector D (13), modulus converter A/D (14), signal Processing computer PC (15) are formed;
The laser that light source S (11) sends is received by acousto-optic modulator (12); Acousto-optic modulator (12) output connects fiber port (16); Fiber port I (16) connects fiber port (17), and fiber port (17) output is connected in series photoelectric detector D13, modulus converter A/D 14, signal Processing computer PC 15 successively;
The laser that light source S11 sends is modulated into pulsed light through acousto-optic modulator 12, gets into fiber port 16; Pass the light of monitoring host computer 1 back from fiber port 17; After photodetector D13 is converted into electric signal by perception, be converted into the manageable digital signal of computing machine at analog-to-digital conversion device A/D14, signal Processing computer PC 15 is carried out intellectual analysis and processing with the disturbing signal that collects.
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| CN 201220197131 CN202600875U (en) | 2012-05-04 | 2012-05-04 | Defence-area optical fiber perimeter protection pre-warning system |
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| CN 201220197131 CN202600875U (en) | 2012-05-04 | 2012-05-04 | Defence-area optical fiber perimeter protection pre-warning system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104517375A (en) * | 2014-12-15 | 2015-04-15 | 北京航天易联科技发展有限公司 | Embedded type security device based on two channels |
| CN105021216A (en) * | 2014-04-28 | 2015-11-04 | 中国计量学院 | Optical fiber perimeter sensing device realizing polarization-induced fading resistance |
| CN107399342A (en) * | 2017-06-30 | 2017-11-28 | 北京中智润邦科技有限公司 | A kind of railway circumference, which is artificially invaded, determines method, apparatus and system |
| CN109035656A (en) * | 2018-08-08 | 2018-12-18 | 中国石油化工股份有限公司 | A kind of setting method of coordinated type positioning optical fiber border guard system |
-
2012
- 2012-05-04 CN CN 201220197131 patent/CN202600875U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021216A (en) * | 2014-04-28 | 2015-11-04 | 中国计量学院 | Optical fiber perimeter sensing device realizing polarization-induced fading resistance |
| CN104517375A (en) * | 2014-12-15 | 2015-04-15 | 北京航天易联科技发展有限公司 | Embedded type security device based on two channels |
| CN107399342A (en) * | 2017-06-30 | 2017-11-28 | 北京中智润邦科技有限公司 | A kind of railway circumference, which is artificially invaded, determines method, apparatus and system |
| CN107399342B (en) * | 2017-06-30 | 2019-08-02 | 北京中智润邦科技有限公司 | A kind of railway circumference, which is artificially invaded, determines method, apparatus and system |
| CN109035656A (en) * | 2018-08-08 | 2018-12-18 | 中国石油化工股份有限公司 | A kind of setting method of coordinated type positioning optical fiber border guard system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211118 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PETROCHINA Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |