CN201498073U - Optical path multiplexing system of zone anti-invasion system based on optical fiber interferometer - Google Patents
Optical path multiplexing system of zone anti-invasion system based on optical fiber interferometer Download PDFInfo
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- CN201498073U CN201498073U CN2009201567023U CN200920156702U CN201498073U CN 201498073 U CN201498073 U CN 201498073U CN 2009201567023 U CN2009201567023 U CN 2009201567023U CN 200920156702 U CN200920156702 U CN 200920156702U CN 201498073 U CN201498073 U CN 201498073U
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Abstract
The utility model relates to an optical path multiplexing system of a zone anti-invasion system based on an optical fiber interferometer, which relates to the technical field of measurement of mechanical vibration, measurement of impact and pipeline systems. The optical path multiplexing system adopts a wavelength multiplexing structure, a light source module is further connected to adapters in each defense zone after being connected with a comb-shaped filter, adapters of defensive lines in each defensive zone are respectively connected with two optical fiber interferometers, and optical fiber interferometers with same protective lines in each defensive zone are connected with the adapters and are coupled with the same optical fiber, are connected to a wave solution multiplexing device through a transmission optical path, and is connected with a host machine for processing after de-multiplexing.
Description
Technical field
The utility model is a kind of light path multiplex system of the region anti-intrusion system based on fibre optic interferometer, 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, and these schemes are subjected to environmental impact equally easily, and some false invasion signals that environment causes are thought by mistake invasion and produced false-alarm.And the consumption of optical fiber is also very big, and expense is big.
The utility model content
The purpose of this utility model is a kind of little, light path multiplex system based on the region anti-intrusion system of fibre optic interferometer of saving affected by environment of design.
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.
A kind of light path multiplex system of the region anti-intrusion system based on fibre optic interferometer: native system is to cooperate based on the region anti-intrusion system of the fibre optic interferometer multiplex system to light path.As shown in Figure 2, region anti-intrusion system based on fibre optic interferometer is with different to the accuracy requirement of intrusion alarm positional information according to the protection zone size, lay one or more defence areas by fibre optic interferometer on the border of protection zone, 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; The light that light source 15 sends arrives light path adapter 17 through transmission light path I16, by demultiplexing after 17 beam splitting of light path adapter, corresponds respectively to the sensing light path 20 in a plurality of defence areas, passes light path adapter 17 back by transmission light path II 18 again; 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 one tunnel sensing light path 20; Detect the light signal phase difference value of transmission in each defence area fibre optic interferometer two pickup arm, the suspicious disturbance event feature in border, protection zone is differentiated, the position and the generation of system's judgement vibration signal were reported to the police when signal characteristic met the intrusion behavior feature mode.
For effectively saving the fibre core resource, when adopting single wavelength light source, the light signal in different defence areas, defence line is aliasing mutually, otherwise just can't accurately distinguish the source of disturbing signal, therefore required fibre core quantity can be bigger when defence area quantity is big, limited the application of region anti-intrusion system.In order to overcome this problem, the utility model proposes a kind of system of multiplexing fibre core: as shown in Figure 1, it is that optical fiber of light source 15 usefulness is connected to adapter I, connects the quantity adapter identical with the defence area number behind the adapter I; The adapter in each defence area connects the fibre optic interferometer in each defence line, road in this defence area again, and the output of these fibre optic interferometers connects cable splice closure in the lump, is connected to detector array by optical cable more at last.
Light source 15 is not the way that adopts the transmission in per pass fibre optic interferometer defence line fibre core after sending light, but adopt the scheme of each light sources transmit fibre core in defence area, the light that light source 15 sends arrives each defence area through a beam splitter beam splitting corresponding to defence area quantity again after light path adapter I beam splitting, the adapter in each defence area beam splitting again is a multi-beam, insert each fibre optic interferometer in this defence line respectively, the output of these fibre optic interferometers connects cable splice closure in the lump and pools together, passes processing at last again behind boundling back.
This scheme in a plurality of defence areas has been carried out the multiplexing of light path at the light source output terminal, has saved the fibre core number to a certain extent, has expanded the application of region anti-intrusion system.
From said method as can be seen, light path multiplex system based on the region anti-intrusion system of fibre optic interferometer, not only can be by the border, protection zone being subdivided into the accurate location that intrusion event has been realized in a plurality of defence areas, on the border, protection zone multiple defence line is set, 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 multiplexing system of single fibre core simultaneously, not only saved the consumption of fibre core greatly, have equally highly sensitive, be not subjected to factor affecting such as temperature, weather, the strong advantage of anti-environmental interference ability is with a wide range of applications.
Description of drawings
The multiplexing synoptic diagram of Fig. 1 light source output terminal light path
Fig. 2 region anti-intrusion system theory diagram
Wherein 15-light source 16-transmits light path I
17-light path adapter 18-transmission light path II
19-protection zone 20-sensing light path
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 this example is as shown in Figure 1.
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; 3 defence areas, defence line, 2 road 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.
For effectively saving the fibre core resource, when adopting single wavelength light source, the light signal in different defence areas, defence line is aliasing mutually, otherwise just can't accurately distinguish the source of disturbing signal, and therefore required fibre core quantity can be bigger when defence area quantity is big.In order to overcome this problem, the structure of this routine multiplexing fibre core:
Adopt the light sources transmit fibre core in each defence area, as shown in Figure 1, the structure of its multiplexing fibre core is: light source meets adapter I by optical fiber, adapter I output meets a corresponding defence area quantity adapter II again, adapter III, adapter IV, each adapter connects two fibre optic interferometers in this defence line respectively, fibre optic interferometer I as defence area I, fibre optic interferometer II, the fibre optic interferometer III of defence area II, fibre optic interferometer IV, the fibre optic interferometer V of defence area III, fibre optic interferometer VI, the output of these fibre optic interferometers connects cable splice closure in the lump, is connected to detector array by optical cable more at last.
The light that light source 15 sends during to first defence area, is multi-beam by adapter I beam splitting with an Optical Fiber Transmission, and quantity is identical with the defence area number; When each bundle light arrives corresponding defence area, by adapter again beam splitting be multi-beam, enter each fibre optic interferometer in this defence area respectively, the output of these fibre optic interferometers connects cable splice closure in the lump, is connected to detector array by optical cable more at last.This scheme has been carried out the multiplexing of light path at the light source output terminal and before arriving each defence area, fibre core quantity capable of reducing using.
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 produces and reports to the police when signal characteristic meets the intrusion behavior feature mode; If when signal characteristic did not conform to the intrusion behavior feature mode, system will not report to the police.This system not only realizes the detection of regional intrusion event but also effectively reduces false alarm rate.
This example is through test of many times, by can realizing the detection to any disturbance behavior in border at the borderline vibration sensing fibre optic interferometer of protection zone, and saved the consumption of optical fiber greatly.
Claims (1)
1. the region anti-intrusion system light path multiplex system based on fibre optic interferometer is characterized in that light source (15) is connected to adapter I with an optical fiber, connects the quantity adapter identical with the defence area number behind the adapter I; The adapter in each defence area connects the fibre optic interferometer in each defence line, road in this defence area again, and the output of these fibre optic interferometers connects cable splice closure in the lump, is connected to detector array by optical cable more at last;
The light that light source (15) sends arrives each defence area through an adapter beam splitting corresponding to defence area quantity again behind adapter I beam splitter, the adapter in each defence area beam splitting again is a multi-beam, insert each fibre optic interferometer in this defence line respectively, the output of these fibre optic interferometers connects cable splice closure in the lump and pools together, passes processing at last again behind boundling back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201567023U CN201498073U (en) | 2009-05-31 | 2009-05-31 | Optical path multiplexing system of zone anti-invasion system based on optical fiber interferometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201567023U CN201498073U (en) | 2009-05-31 | 2009-05-31 | Optical path multiplexing system of zone anti-invasion system based on optical fiber interferometer |
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| Publication Number | Publication Date |
|---|---|
| CN201498073U true CN201498073U (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201567023U Expired - Fee Related CN201498073U (en) | 2009-05-31 | 2009-05-31 | Optical path multiplexing system of zone anti-invasion system based on optical fiber interferometer |
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| Country | Link |
|---|---|
| CN (1) | CN201498073U (en) |
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2009
- 2009-05-31 CN CN2009201567023U patent/CN201498073U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20150531 |
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| EXPY | Termination of patent right or utility model |