CN100487510C - Optical fiber safety early warning signal identification system - Google Patents
Optical fiber safety early warning signal identification system Download PDFInfo
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- CN100487510C CN100487510C CNB2006100906007A CN200610090600A CN100487510C CN 100487510 C CN100487510 C CN 100487510C CN B2006100906007 A CNB2006100906007 A CN B2006100906007A CN 200610090600 A CN200610090600 A CN 200610090600A CN 100487510 C CN100487510 C CN 100487510C
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Abstract
The invention is an optic fiber safety prewarning signal identifying system of buried tube, construction or important establishment and area. Output of the optic fiber interferometer is connected with photoelectricity signal process circuit [302], character signal pick-up module [303] connected with the photoelectricity signal process circuit [302] is connected with expert system [304] then connected with the analyzing and judging system [305], the analyzing and judging system [305] is connected with local managing system [110]; output of the photoelectricity signal process circuit [302] is connected with audio processor [306] with audio buffer [307], output of the audio processor [306] is connected with local managing system [110], another output is connected with D/A[309], amplifying circuit [310] to the audio output equipment [311], at the same time the local managing system [110] possesses a output to audio equipment [311]. The invention can detect any soil oscillation signal within 3 meters effectively; judgment for property of event is accurate, stable, and reliable, without leakage.
Description
Technical field
The present invention is the optical fiber safety early warning signal identification system of the safeguard protection early warning in a kind of buried pipeline or structures or critical facility and zone, relates to the measurement of mechanical vibration, the measurement and the piping system technical field of impact.
Background technology
For materials such as oil, rock gas, product oil, coal slurry and water, pipeline transportation is a kind of safe, economic and means of transportation efficiently, in global carrier, bringing into play more and more important effect, especially at oil, finished product oil and gas these have inflammable and explosive and energy substance transportation that transaction value is high in occupy very important position, in our country, annual newly-built several thousand kilometers at least pipeline be we can say, pipeline is the main artery of energy transportation.The oil of pipeline transportation, the existing high transaction value of finished product oil and gas also have inflammable and explosive this characteristic, pipeline is in case leak, combustion explosion very easily takes place in leakage region, not only influence the safety in production of pipeline industry, cause enormous economic loss, and all edge line people's property and life security in serious threat.In addition, the pipeline leakage can't be estimated especially to the harm that peripheral ecologic environment causes.
Since pipeline has been arranged, the destruction that comes from the outside has just been arranged also.Especially in the last few years, rise of the oil price, under the driving of interests, the lawless person is possessed with a lust for gain, drilling hole of oil stolen, robber's gas on pipeline; Capital construction starts in a large number, and pipeline construction site along the line is seen everywhere; In addition, disasteies such as landslide, rubble flow take place again and again, the production safety that these are all constantly threatening pipeline, and wherein drilling hole of oil stolen and illegal construction become the primary factor of threat tube safety in production.
According to incompletely statistics, only China destroys the pipe leakage that causes because of the external world or explode last over thousands of time every year, and direct economic loss reaches several hundred million yuan, and indirect losses such as environmental disruption and social influence can't be estimated especially.For preventing outer bound pair pipeline destroyed, the pipeline transportation industry has dropped into lot of manpower and material resources every year, but still can't effectively prevent and stop destruction.The safety in production form of pipeline transportation industry is very severe, and it is extremely urgent to seek means and the method for guaranteeing the pipeline transportation safety in production.
Along with the development of pipeline transportation industry, various pipeline transportation safety monitoring technologies are also in continuous development, and present existing pipe safety production monitoring technology mainly contains two classes.One: the monitoring technology after the pipe leakage incident takes place, this technology mainly contains " tube fluid mechanical state detection technique and distribution type fiber-optic temperature and stress monitoring technology ".Tube fluid mechanical state detection technique is to gather signals such as the flow of fluid in the pipeline, temperature and pressure in real time, carry out pipeline leakage testing and location, this technology is subjected to the effects limit such as performance of fluid behaviour, delivery technology and testing tool in the pipeline, sensitivity and bearing accuracy to line leakage are lower, and this class technology comprises: pressure gradient method, negative pressure wave method, flow equilibrium method.Distribution type fiber-optic temperature and stress monitoring technology are the positions that the medium that utilizes the nonlinear characteristic of optical fiber (Ramam effect and brillouin effect) to gather pipe leakage is in real time determined leakage point to the temperature effect and the shock stress of optical fiber, and this technology is subjected to the distance limit of the structure of optical cable and optical cable and leakage point and influences monitoring effect.They are two years old, prevention monitoring technology before the pipeline damage incident takes place, pipeline damage early warning technology just, existing such technology mainly is " technology of acoustic wave monitoring " at present, this technology is to utilize sound wave along the pipeline transmission principle, an active sensor is being installed every about 1 kilometer, picking up pipeline voice signal along the line is analyzed, determine event property, and then the incident of destroying pipeline found in advance, but each senser element must be equipped with a cover electric supply installation and a communicator, not only increases the investment and the maintenance cost of equipment, and these facilities are also destroyed easily itself, and device can not normally be moved.
At the problem that existing pipe safety monitoring technology exists, Australia has patent to propose based on Mach-Zehnder (Mach-Zehnder) fibre optic interferometer principle, with the technical scheme of optical fiber sense vibration.This invention is a breakthrough to the line target or the large-area appearance target safe early warning of long distance, but not enough be the light path system instability of this invention, be difficult to effectively work, and in the identification of signal, also owe maturation.
Summary of the invention
The objective of the invention is to invent in the optical fiber safety early-warning system of safeguard protection early warning in a kind of buried pipeline, structures or ground structures, critical facility and zone supporting accurately, optical fiber safety early warning signal identification system reliably.
The problem that the present invention exists according to existing pipe safety monitoring technology, propose a kind of with based on two Mach-Zehnders (Mach-zehnder) fibre optic interferometer principle that adopts phase fading control and polarization decay control technology, formed two-way and interfered laser modulation signal synchronously relative the transmission and supporting blipology in the optical fiber safety early-warning system of the light channel structure that the interferometer both-end picks up on the interferometer with stable phase angle and stable polarized attitude.It is utilize with pipeline laying in one ditch or structures, critical facility and zone on every side the common communications optical fiber in the subterranean cable as the interference arm and the Transmission Fibers of interferometer, and then the soil vibration detecting sensor of formation continuous distribution formula, pick up near the vibration signal of soil along the line of pipeline.On the optical fiber safety early-warning system technical foundation, the present invention is according to pipeline soil flutter failure along the line incident genesis mechanism and characteristics, adopt the signal recognition principle of multiple means comprehensive utilization, identify the character and the classification of the soil flutter failure incident of monitored targeted security productions such as harm pipeline timely and accurately.
Realization principle of the present invention is:
On the optical fiber safety early-warning system technical foundation, the present invention is according to pipeline soil flutter failure along the line incident genesis mechanism and characteristics, employing expert system (or neural network) proposed, artificial audio frequency is intercepted and the artificial vision detects the signal recognition principle of debating three kinds of means comprehensive utilizations, identifies the soil flutter failure incident that the harm pipe safety is produced timely and accurately.One is converted into electric signal to the soil vibration signal of sensor, and it is handled and conversion, extracts and expert system (neural network) through eigenwert, identifies the type and the character of soil vibration signal; Its two, the soil vibration signal of sensor is converted into electric signal, it is carried out Audio Signal Processing, by analyzing, carry out teletransmission or this locality and manually intercept, further confirm the type and the character of soil vibration signal; They are three years old, the locator value of the soil vibration signal that positioning system from optical fiber safety early-warning system is obtained is as an abscissa axis, the frequency number of times that same locator value is occurred is as another coordinate axis, the time that vibration event is continued is as the trend of change color, according to the length of time remaining, color changes according to certain rules, by analyzing, carry out teletransmission or local artificial vision and detect and debate, further confirm the type and the character of soil vibration event.
The present invention not only is applicable to the optical fiber safety early-warning system of pipeline; also be applicable to the optical fiber safety early-warning system of other critical facility and important area, such as: critical facilitys such as communications optical cable, means of transportation, historic reservation, armory, emphasis office and essential industry plant area and regional optical fiber safety early-warning system.
Concrete formation of the present invention as shown in Figure 1, be with the pipeline laying in one ditch or spread on structures under peripherally two optical fiber 1,2 and form on the basis of Mach-Zehnder (Mach-Zehnder) fibre optic interferometer and laser instrument 101 with optical fiber 1,2 by channel join-splitting device 203, channel join-splitting device 204, photoelectric signal processing circuit 302 is connected with fibre optic interferometer, the characteristic signal extraction module 303 that is connected with photoelectric signal processing circuit 302 be connected with analysis judgment system 305 more in the lump after expert system 304 is connected, analysis judgment system 305 is connected with local management control system 110; Photoelectric signal processing circuit 302 outputs are connected to the audio process 306 of audio buffer 307, one output of audio process 306 connects local management system 110, another output connects D/A309, amplifying circuit 310 to audio output apparatus 311, and local management system 110 has an output directly to connect audio output apparatus 311 simultaneously.
More accurate for what event property was judged, another output of photoelectric signal processing circuit 302 connects positioning system 106, the output of positioning system 106 connects vision data analytic system 308,308 1 outputs of vision data analytic system connect local management control system 110, also connect local management control system 110 after another road output connects vision output device 312, the adding artificial vision detects and debates; For incident is given the alarm, also can connect local warning 108 in the output of local management control system 110, carry out this locality and report to the police, maybe can connect communication system 113, teletransmission is reported to the police.
Photoelectric detector is converted into electric signal to vibration signal, and photoelectric signal processing circuit 302 is done technical finesses such as filtering, amplification and conversion to the electric signal that detects.
Characteristic signal extraction module 303 carries out eigenwert to the signal that obtains from photoelectric signal processing circuit 302 and extracts, and give analysis judgment system 305, analysis judgment system 305 is compared the eigenwert of the eigenwert of signal and expert system (or neural network) 304 destruction Signals Data Bases, the comparison result dissmilarity, then abandon and temporary cache in the buffer of expert system (or neural network) 304, similar, then give local management control system 110; In addition, detect with vision that to be identified after debating be destructive insident really if intercepted through artificial audio frequency by the vibration event abandoned, then local management control system 110 notice expert system (or neural networks) 304 deposit the signal characteristic value of this incident in the destructive insident characteristic value data storehouse in, form self-learning ability.
Vision data analytic system 308 according to the locator value of the soil vibration signal that obtains from positioning system 106 as an abscissa axis, the frequency number of times that same locator value is occurred is as another coordinate axis, the time that vibration event is continued is as the trend of change color, length according to time remaining, color changes according to certain rules, by analyzing and processing, and give local management system 110 analysis result
Electric principle of the present invention constitutes as shown in Figure 2, photoelectric signal processing circuit 302 one tunnel outputs connect the input of the characteristic signal processing host 303-1 that comprises characteristic signal value extraction module 303, expert system (or neural network) 304 and analysis judgment system 305, and the output of characteristic signal processing host 303-1 connects the input of local management system 110; One output of local management system 110 connects the input of audio output apparatus 311, and the output that connects the audio process of exporting from photoelectric signal processing circuit 302 306 connects audio output apparatus 311, and an output of local management system 110 directly connects audio process 306.
As mentioned above, more accurate for what event property was judged, the output of flashlight electric treatment circuit 302 also can connect the input of positioning system 106, the output of positioning system 106 connects the input of vision data analytic system 308,308 1 outputs of vision data analytic system connect local management control system 110, also connect local management control system 110 after another road output connects vision output device 312.
It is available that photoelectric signal processing circuit 302, characteristic signal value extraction module 303, expert system (or neural network) 304, analysis judgment system 305, audio processing modules 306, audio buffer 307, vision data analytic system 308, D/A309, amplifying circuit 310, audio output apparatus 311, vision output device 312, positioning system 106, local management system 110, communication system 113 all have general city's pin product in the native system.
Description of drawings
Fig. 1 optical fiber safety early warning signal identification system theory diagram
Fig. 2 optical fiber safety early warning signal identification system electrical schematic diagram
106-positioning system, 110-local management control system wherein
113-communication system, 302-photoelectric signal processing circuit
303-signal characteristic value extraction module, 304-expert system
305-analysis judgment system, 306-audio processing modules
307-audio buffer, 308-vision data analytic system
309-D/A, 310-amplifying circuit
311-audio output apparatus, 312-vision output device
Embodiment
Embodiment. also the present invention is further illustrated with this example the specific embodiment of the present invention to be described.This example is an experimental prototype, and it constitutes as shown in Figure 2.Thick connecting line is an optical fiber among the figure, and thin connecting line is an electric wire.Specifically constitute: photoelectric signal processing circuit 302 one tunnel outputs connect the input of characteristic signal processing host 303-1, and the output of characteristic signal processing host 303-1 connects the input of local management control system 110; Another road output of photoelectric signal processing circuit 302 also can connect the input of positioning system 106, the output of positioning system 106 connects the input of vision data analytic system 308,308 1 outputs of vision data analytic system connect local management control system 110, also connect local management control system 110 after another road output connects vision output device 312; One output of local management control system 110 connects the input of audio output apparatus 311, photoelectric signal processing circuit 302 has output to connect audio process 306, the output of audio process 306 connects audio output apparatus 311, one output of local management system 110 directly connects audio process 306, and an output of local management control system 110 also can be connected communication system 113.Here characteristic signal processing host 303-1 comprises characteristic signal value extraction module 303, expert system (or neural network) 304 and analysis judgment system 305.
Wherein local management system 110: auspicious industrial computer, model: PPC-1201 (T) are ground in choosing; Positioning system 106: select America NI instrument PXI-1042 8-Slot 3U CPU:PXI-8196 P-M760 2.0G 512M I/O:PXI-5124,2-Channel 12-Bit 200MHz; Single-frequency laser 101 selects model: KOHERASADJUSTIK HP E15; Channel join-splitting device 203 and channel join-splitting device 204 models: the WDM-A-2 * 2-1550-1-FC/UPC-3*54 of Lang Guang company; Photoelectric signal processing circuit 302: general two-way symmetry photoamplifier circuit, the light input range :-20～-45dBm, output area :-3V～+ 3V; Characteristic signal processing host 303-1 comprises characteristic signal value extraction module 303, expert system (or neural network) 304 and analysis judgment system 305, this machine model is joined 4CPU 8M buffer memory 32G internal memory, I/O:NI PCI-E6251 1.25M16channel 16bit for the perfectly sound R630 G5 of association; Audio processing modules 306 and audio buffer 307: use be the audio process of ATEIS (Ya Tisi) company, model is UAP88; Vision data analytic system 308: be the PXI-10428-Slot 3U CPU:PXI-8196 P-M760 2.0G 512M I/O:PXI-5124 of NI company, 2-Channel12-Bit 200MHz; D/A309, amplifying circuit 310, audio output apparatus 311: the Hi-Fi sound-box and the earphone that are innovation SB Audigy2ZS Platinum Pro and Ai Defa company; Vision output device 312: be HPMP3135DW; Communication system 113 is used, and what be that HP Proliant DL380 and 3COM switch communication system 113 use is HP Proliant DL380 and 3COM switch.
Behind the incident signal of video signal of the incident sound signal of input port reception audio processing modules 306 outputs of local management system 110, the event property signal of analysis process system 305 outputs and 308 outputs of vision data analytic system, treated, by its delivery outlet I/O respectively outgoing event sound signal and event property signal through D/A309, amplifying circuit 310, audio output apparatus 311, send the indication of incident sound signal and event property, the outgoing event video signal provides the incident image through vision output device 312; The output of local management system 110 can connect local the warning, also can send alerting signal to a distant place through communication system 113 simultaneously.
Native system is equipped with optical fiber safety early warning light path system through on probation and test; the proof native system can effectively detect near the optical cable 3 meters with interior any soil vibration signal; identify the character and the classification of the soil flutter failure incident of crisis pipe safety production timely and accurately, and, no omission stable, reliable to the judgement of event property.
Therefore, the present invention can effectively detect near the optical cable 3 meters with interior any soil vibration signal, and adopt expert system (or neural network), artificial audio frequency to intercept with the artificial vision and detect the signal recognition principle of debating three kinds of means comprehensive utilizations, identify the soil flutter failure incident that the harm pipe safety is produced timely and accurately; And the judgement to event property is accurate, stable, reliable, no omission; Fundamentally solved the signal identification problem of buried pipeline, structures or ground structures, critical facility and the regional optical fiber safety early-warning system of avoiding destroying.
Claims (5)
1. the optical fiber safety early warning signal identification system of the safeguard protection early warning of buried pipeline or structures, comprise with the pipeline laying in one ditch or spread on first optical fiber (1) of structures under peripherally, second optical fiber (2), the 3rd optical fiber (3) reaches by first channel join-splitting device (203), second channel join-splitting device (204) and first optical fiber (1), Mach-Zehnder optical fiber interferometer and laser instrument (101) that second optical fiber (2) is formed, it is characterized in that photoelectric signal processing circuit (302) is connected with Mach-Zehnder optical fiber interferometer, the characteristic signal extraction module (303) that is connected with photoelectric signal processing circuit (302) is with after expert system (304) is connected, characteristic signal extraction module (303), expert system (304) is connected with analysis judgment system (305) respectively again, and analysis judgment system (305) is connected with local management system (110); Photoelectric signal processing circuit (302) output is connected to the audio process (306) of audio buffer (307), one output of audio process (306) connects local management system (110), another output connects D/A (309), amplifying circuit (310) to audio output apparatus (311), and local management system (110) has an output directly to connect audio output apparatus (311) simultaneously.
2. optical fiber safety early warning signal identification system according to claim 1, it is characterized in that photoelectric signal processing circuit (302) one tunnel outputs connect the input of the characteristic signal processing host that comprises characteristic signal extraction module (303), expert system (304) and analysis judgment system (305), the output of characteristic signal processing host connects the input of local management system (110); One output of audio process (306) connects local management system (110), and another output connects D/A (309), amplifying circuit (310) to audio output apparatus (311), and local management system (110) has an output directly to connect audio output apparatus (311) simultaneously.
3. optical fiber safety early warning signal identification system according to claim 1 and 2, it is characterized in that the output of photoelectric signal processing circuit (302) can also connect the input of positioning system (106), the output of positioning system (106) connects the input of vision data analytic system (308), (308) one outputs of vision data analytic system connect local management system (110), also connect local management system (110) after another road output connects vision output device (312).
4. optical fiber safety early warning signal identification system according to claim 1 and 2 is characterized in that the output of local management system (110) is connected to communication system (113).
5. optical fiber safety early warning signal identification system according to claim 1 and 2 is characterized in that the output of local management system (110) is connected to local the warning.
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| CNB2006100906007A CN100487510C (en) | 2006-06-30 | 2006-06-30 | Optical fiber safety early warning signal identification system |
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| CNB2006100906007A CN100487510C (en) | 2006-06-30 | 2006-06-30 | Optical fiber safety early warning signal identification system |
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| CN100487510C true CN100487510C (en) | 2009-05-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108599865B (en) * | 2018-04-13 | 2020-04-28 | 北京邮电大学 | Signal modulation format identification method and device based on photon neural network |
| CN109614926B (en) * | 2018-12-07 | 2021-09-14 | 武汉理工光科股份有限公司 | Distributed optical fiber sensing signal mode identification method and system based on prediction model |
| CN111292510A (en) * | 2020-01-16 | 2020-06-16 | 广州华铭电力科技有限公司 | Recognition early warning method for urban cable damaged by external force |
| CN111397849B (en) * | 2020-04-20 | 2021-08-06 | 深圳市特发信息股份有限公司 | Optical fiber damage monitoring system by analyzing various environment vibration signals |
| CN113537160B (en) * | 2021-09-13 | 2022-01-18 | 天津中新智冠信息技术有限公司 | Ball mill load measuring method, ball mill load measuring device, electronic equipment and medium |
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Effective date of registration: 20170306 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: China National Petroleum Corporation Patentee after: China Petroleum Pipeline Bureau Engineering Co., Ltd. Address before: 100724 Beijing, Xicheng District No. six shop pit No. 6 Patentee before: China National Petroleum Corporation Patentee before: China Petroleum and Natural Gas Pipeline Bureau |
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