CN103983286A - Multi-parameter large-capacity optical fiber passive sensing networking system - Google Patents
Multi-parameter large-capacity optical fiber passive sensing networking system Download PDFInfo
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- CN103983286A CN103983286A CN201410213363.3A CN201410213363A CN103983286A CN 103983286 A CN103983286 A CN 103983286A CN 201410213363 A CN201410213363 A CN 201410213363A CN 103983286 A CN103983286 A CN 103983286A
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Abstract
The invention discloses a multi-parameter large-capacity optical fiber passive sensing networking system, and relates to the field of optical fiber sensing networks. A broadband light source sends out sensing signals, a center control node sends out control signals, the sensing signals and the control signals pass through a work transmitting end and an optical fiber coupler and enter a work optical fiber together after being processed by a wavelength division multiplexer, after being transmitted for a period of time, the sensing signals and the control signals arrive at a sensor node, then the sensing signals and the control signals which are needed by the sensor node are sent to the sensor node through a work end connection optical fiber and the wavelength division multiplexer, and other sensing signals and other control signals continue to be transmitted to the rest N-1 sensor nodes through an optical switch and the optical fiber coupler. According to the multi-parameter large-capacity optical fiber passive sensing networking system, a multi-parameter large-capacity optical fiber passive sensing network is achieved, a discrete-type optical fiber sensing unit and a distributive-type sensing unit are integrated in a passive network, various topology structures are mixed, and efficient and reliable operation of the optical fiber sensing network is guaranteed.
Description
Technical field
The present invention relates to optical fiber sensor network field, relate in particular to a kind of many reference amounts, high-capacity optical fiber passive sensing group network system.
Background technology
Optical fiber sensor network is will to realize in a large number that the Fibre Optical Sensor unit of difference in functionality and demodulating unit are organically combined according to certain topological structure and a kind of information sensing and the demodulation network that form.Fibre Optical Sensor unit and demodulating unit are the core components of optical fiber sensor network, are responsible for realizing effectively obtaining of heat transfer agent; Topological structure reflection be the structural relation of network, it also has very important impact for performance, reliability and the construction of network and handling cost etc.
Optical fiber passive Sensor Network was controlled node by backbone network, sensing subnet, center control nodes and N minute and is formed.Backbone network is comprised of devices such as signal optical source, control light source, fiber coupler, photoswitch, single-mode fibers; Sensing subnet is comprised of devices such as N Fibre Optical Sensor node, demodulation receiver module, photoswitches; Sensing subnet comprises multiple, a plurality of discrete sensing subnets and distributed sensing subnet, and each sensing subnet is by distributing or discrete passive Fibre Optical Sensor cell formation; Center control nodes is comprised of institutes such as node transmitter module, continuous laser, center control chip, photoswitch, PIN pipes; Divide control node to be formed by institutes such as node transmitter module, continuous laser, minute control chip, photoswitch, PIN pipes; Discrete sensing subnet and distributed sensing subnet respectively have relative merits at aspects such as performance, application, should not attempt folk prescription and substitute, and answer reasonable combination to complement one another.
Existing research report is all for discrete and distributed sensing subnet, to study respectively, and mixed networking is conducive to bring into play discrete sensing unit and distributed sensing unit advantage separately, realizes many reference amounts, jumbo optical fiber passive Sensor Network.Many reference amounts, jumbo optical fiber sensor network have also restricted network to various topological structures, fusion discrete and distributed future development conversely.
Summary of the invention
The invention provides a kind of many reference amounts, high-capacity optical fiber passive sensing group network system, the present invention proposes discrete and distributing optical fiber sensing mixed networking, to realize many reference amounts, high-capacity optical fiber passive sensing net, discrete Fibre Optical Sensor unit and distributed sensing unit are merged in passive network, mix various topological structures, guaranteed Fibre Optical Sensor web, high efficiency, reliability service, described below:
Many reference amounts, a high-capacity optical fiber passive sensing group network system, comprising: within wideband light source, center control nodes, wavelength division multiplexer, fiber coupler, photoswitch and N minute, control node,
Described wideband light source sends transducing signal, described center control nodes is sent control signal, and described transducing signal and described control signal together enter in working optical fibre through work transmitting terminal and described fiber coupler after by the processing of described wavelength division multiplexer,
Through one section of transmission, arrive sensor node, the required transducing signal of described sensor node is connected to optical fiber reconciliation wavelength division multiplexer with control signal through working end and sends to sensor node, all the other transducing signals and control signal are continued to propagate to a remaining N-1 sensor node by photoswitch and described fiber coupler.
Optical fiber is controlled between node and is transmitted described center control nodes and described minute, and the wavelength by downgoing control signal 1450nm and uplink control signal 1350nm transmits respectively.
Described system also comprises: alternate channel, standby optical fiber and standby connection optical fiber,
If described work transmitting terminal breaks down, described wideband light source and described center control nodes are switched to described alternate channel, through described standby optical fiber and described standby connection optical fiber, enter into described sensor node successively.
The beneficial effect of technical scheme provided by the invention is:
1, the wavelength used of the sensor node in each sensing node is different, and sensor node self can determine whether modulation signal to be passed back that receiving end is together processed or process modulation signal nearby at sensing node obtains measuredly, and this system does not have concrete class limitations for the Fibre Optical Sensor node of single mode.
2, optical fiber transmits between center control nodes and minute control node, wavelength by downgoing control signal 1450nm and uplink control signal 1350nm transmits respectively, between node module, be passive transmission completely, there are a series of outstanding advantages such as anti-electromagnetic interference (EMI), volume are little, low-loss.
3, take each sensor node line is axis; the device mirror images such as working optical fibre and coupling mechanism photoswitch are gone out to protect optical fiber and interface unit; when there is the damage of fibercuts or device, cause one or several sensor node normally during sensing, can automatically switch to alternate channel make sensing and communication recovery normal.
4, the work that system can be recovered all sensors node when there is a place fault in each child node, recovery rate can reach 100%; If there are two place's faults to occur in same node, consider all contingent fault combinations, ten sensor nodes of take are example, can provide 92% fault signal completely to recover.
Accompanying drawing explanation
Fig. 1 is the structural representation of many reference amounts, high-capacity optical fiber passive sensing group network system;
Fig. 2 is sensor node self-healed protection light path schematic diagram in Fibre Optical Sensor subnet;
Fig. 3 is the interior schematic diagram of the node of working optical fibre fracture in any sensor node;
Fig. 4 is for to be divided into N block by the N of an optical fiber sensor network sensor node, the Sensor Network model schematic diagram of the self-healing ability of Sensor Network when the fault of analyzing based on this varying number kind occurs.
In accompanying drawing, the list of parts of each label representative is as follows:
1: transducing signal and control signal; 2: service aisle transmitting terminal;
3: fiber coupler; 4: working optical fibre;
5: working end connects optical fiber; 6: alternate channel transmitting terminal;
7: standby optical fiber; 8: standby connection optical fiber;
9: sensor node; 10: sensing and control signal receiving end;
11: photoswitch.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below embodiment of the present invention is described further in detail.
Therefore, how research rationally merges discrete Fibre Optical Sensor unit and distributed sensing unit with the problem in same passive network, by mixing various topological structures, set up polymorphic type, many reference amounts, many topologys, jumbo optical fiber passive Sensor Network networking theory and model tool and be of great significance.For this reason, the embodiment of the present invention provides a kind of many reference amounts, high-capacity optical fiber passive sensing group network system, referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, described below:
This system comprises: within wideband light source (not shown), center control nodes (not shown), wavelength division multiplexer (not shown), fiber coupler 3, photoswitch and N minute, control node (not shown),
Wideband light source sends transducing signal, center control nodes is sent control signal, transducing signal and control signal (in Fig. 1, with 1, representing) together enter in working optical fibre 4 through service aisle transmitting terminal 2 and fiber coupler 3 after by the processing of wavelength division multiplexer, through one section of transmission, arrive sensor node 9, the required transducing signal of sensor node 9 is connected to optical fiber 5 reconciliation wavelength division multiplexer (not shown) with control signal through working end and sends to sensor node 9, all the other transducing signals and control signal are continued to propagate to a remaining N-1 sensor node by photoswitch 11 and fiber coupler 3.
Meanwhile; the line of each sensor node 9 of take is axis; the device mirror images such as working optical fibre 4, fiber coupler 3 and photoswitch 11 are gone out to protect optical fiber and interface unit; when there is the damage of fibercuts or device, cause one or several sensor node normally during sensing, can automatically switch to alternate channel make sensing and communication recovery normal.That is,
If service aisle transmitting terminal 2 breaks down, wideband light source and center control nodes are switched to alternate channel transmitting terminal 6, through standby optical fiber 7 and standby connection optical fiber 8, enter into sensor node 9 successively.Whether 9 of sensor nodes pass signal back sensing and control signal receiving end 10 according to self determining.
Referring to Fig. 2, optical fiber self-healing Sensor Network is when normal work, and transducing signal and control signal all transfer to sensor node 9 in working optical fibre 4, as shown in solid arrow in Fig. 2.When having fault to occur, according to concrete failure mode and guilty culprit position, optical fiber self-healing Sensor Network is implemented to switch action to the photoswitch 11 at working optical fibre 4 and standby optical fiber 7 two ends automatically, and fault does not affect the normal operation of each sensor node 9.
Below in conjunction with embodiment, describe working mechanism and the self-healing principle of many reference amounts of the present invention, high-capacity optical fiber self-healing Sensor Network in detail, described below:
This embodiment describes in conjunction with sensor-based systems such as optical fiber measurement pressure, temperature, disturbances locations; when optical fiber sensor network is normally worked; the information such as detection pressure, temperature, disturbances location simultaneously; three sensor-based system wavelength used are different; the control wavelength of simultaneity factor is up 1350nm; descending 1450nm, specifically protection process comprises the following steps:
Transducing signal is connected optical fiber 5 with control signal through work transmitting terminal 2, fiber coupler 3, working optical fibre 4 and working end and transfers to sensor node 9; under non-failure conditions, each sensor-based system all keeps normal operating conditions; when having fault to occur; according to concrete failure mode (being illustrated in figure 3 working optical fibre in node ruptures) and guilty culprit position; Sensor Network implements to switch action to the protection photoswitch at the two ends of working optical fibre 4 and standby optical fiber 7 automatically; as shown in Figure 2, fault does not affect the normal operation of each sensor node 9.
Referring to Fig. 4, sensing and control signal 1 and each sensor node 9 have formed the network topology structure being one another in series, and can analyze fault accordingly.When system has N sensor node 9, can qualitative and quantitative analysis when single-sensor node 9 interior generation one place or two place's faults, or neither when respectively there is a place fault in sensor node, for the self-healing ability of different failure mode optical fiber sensor networks.
Optical fiber transmits between center control nodes and minute control node, wavelength by downgoing control signal 1450nm and uplink control signal 1350nm transmits respectively, between node module, be passive transmission completely, there are a series of outstanding advantages such as anti-electromagnetic interference (EMI), volume are little, low-loss.
Sensor node 9 wavelength used in each sensing node is different, and sensor node 9 self can determine whether modulation signal to be passed back that receiving end is together processed or it is measured at sensing node, modulation signal demodulation to be obtained nearby, and this system does not have concrete class limitations for the sensor node of single mode.
It is example that N the sensor node of take is divided into N child node by Sensor Network, experimental results show that the work that system can be recovered all sensors node when there is a place fault in each child node, and recovery rate can reach 100%; If there are two place's faults to occur in same node, consider all contingent fault combinations, ten sensor nodes of take are example, can provide 92% fault signal completely to recover.
The duty of optical fiber sensor network is all controlled node by main control node and each minute and is controlled, and the working of network and sensor node is uploaded in real time host computer and controls, and operator can carry out various self-healing property operations to system as required.
In sum, compare with existing fiber Sensor Network technology, networking when the present invention can realize many reference amounts, large capacity discrete, distributed fiberoptic sensor, signals transmission is realized omnidistance passive.When network optional position device breaks down, the protection light path that the axial mirror image forming with sensor node produces provides self-healing function automatically, after the artificial reparation of band fault, can return to pre-fault status by host computer.System has well stable row and extensibility, realizes parameter, jumbo optical fiber self-healing Sensor Network.
The embodiment of the present invention to the model of each device except do specified otherwise, the model of other devices does not limit, as long as can complete the device of above-mentioned functions, all can.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. many reference amounts, a high-capacity optical fiber passive sensing group network system, comprising: wideband light source, center control nodes, wavelength division multiplexer, fiber coupler, photoswitch and N is divided control node, it is characterized in that,
Described wideband light source sends transducing signal, described center control nodes is sent control signal, and described transducing signal and described control signal together enter in working optical fibre through work transmitting terminal and described fiber coupler after by the processing of described wavelength division multiplexer,
Through one section of transmission, arrive sensor node, the required transducing signal of described sensor node is connected to optical fiber reconciliation wavelength division multiplexer with control signal through working end and sends to sensor node, all the other transducing signals and control signal are continued to propagate to a remaining N-1 sensor node by photoswitch and described fiber coupler.
2. a kind of many reference amounts according to claim 1, high-capacity optical fiber passive sensing group network system, is characterized in that,
Optical fiber is controlled between node and is transmitted described center control nodes and described minute, and the wavelength by downgoing control signal 1450nm and uplink control signal 1350nm transmits respectively.
3. a kind of many reference amounts according to claim 1, high-capacity optical fiber passive sensing group network system, is characterized in that, described system also comprises: alternate channel, standby optical fiber and standby connection optical fiber,
If described work transmitting terminal breaks down, described wideband light source and described center control nodes are switched to described alternate channel, through described standby optical fiber and described standby connection optical fiber, enter into described sensor node successively.
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Cited By (3)
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| CN105783948A (en) * | 2016-03-25 | 2016-07-20 | 北京信息科技大学 | FBG sensor system based on cooperation of multiple sensing modules |
| CN106154356A (en) * | 2016-08-11 | 2016-11-23 | 范雯杰 | The online fault detection system of automatic weather station and detection method |
| CN106706159A (en) * | 2016-12-06 | 2017-05-24 | 信阳师范学院 | Fiber grating transformer multi-parameter intelligent monitoring system based on multiagent technology |
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| CN106706159A (en) * | 2016-12-06 | 2017-05-24 | 信阳师范学院 | Fiber grating transformer multi-parameter intelligent monitoring system based on multiagent technology |
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Application publication date: 20140813 |