CN107144300A - A kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure - Google Patents
A kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure Download PDFInfo
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- CN107144300A CN107144300A CN201710461939.1A CN201710461939A CN107144300A CN 107144300 A CN107144300 A CN 107144300A CN 201710461939 A CN201710461939 A CN 201710461939A CN 107144300 A CN107144300 A CN 107144300A
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- 239000000835 fiber Substances 0.000 title claims abstract description 48
- 238000004092 self-diagnosis Methods 0.000 title claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 230000035945 sensitivity Effects 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 abstract description 20
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 208000037408 Device failure Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
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- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure, using trigonometric expression topological structure, network node uses fiber coupler, wavelength division multiplexer WDM is connected through between the adjacent fiber coupler of each two will sense optical signal and access and derived fibre optical sensor；Monitoring signal receiving terminal in the topological mechanism of sensing while the incidence end injection monitoring light of system is provided with multiple power detectors.The position of failure point in Sensor Network is derived by analyzing the light intensity variable quantity received by power detector array.The fiber coupler is 3dB fiber couplers.The power detector is high sensitivity photodetector.The trigonometric expression optical-fiber intelligent sensing network structure of the present invention can be under the conditions of the passive low cost using only a small amount of optical fibre device, it is significantly increased the multiplexing quantity of fibre optical sensor, fit structure is simple and hardware system that easily realize completes Intelligent self-diagnosis to sensor network.
Description
Technical field
The present invention relates to a kind of sensing network structure, especially a kind of Large Copacity trigonometric expression passive fiber self diagnosis Sensor Network
Network structure.
Background technology
In recent years, fibre optical sensor plays irreplaceable effect with its unique advantage in many key areas.By
There is bandwidth, transmission low-loss, small volume light weight in optical fiber, impart fibre optical sensor composition Sensor Network and carry out
The ability of large scale measurement.Fibre optical sensor is according to its sensing principle, design feature and certain topological structure formation optical fiber intelligence
Energy Sensor Network, is carried out round-the-clock under conditions of the environment such as Aero-Space, bridge, tunnel, oil storage tank are extremely harsh to measured object
Monitoring in real time.Because optical fiber is more fragile in itself, easily there is the damage of sensor especially when adverse circumstances work, may lead
Cause fault sensor and can not be worked on the other sensors in its same passage, this is accomplished by Sensor Network and possesses self diagnosis
Function, i.e., it is automatic to find the position of optical fiber or sensor degradation point, and alarm.Currently for the research of optical-fiber intelligent sensing net
Also there are some problems, such as kind of sensor is single, sensor multiplexing quantity is few, topological structure is complicated and can not realize sensing
Self diagnosis of device failure etc..Based on this, the Research Significance for carrying out optical-fiber intelligent sensing net theory and key technology is great.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network
Structure.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of Large Copacity trigonometric expression passive fiber
Self diagnosis sensing network structure, using trigonometric expression topological structure, network node uses fiber coupler, the adjacent light of each two
Wavelength division multiplexer WDM is connected through between fine coupler will sense optical signal access and derived fibre optical sensor；In system
Monitoring signal receiving terminal while incidence end injection monitoring light in the topological mechanism of sensing is provided with multiple power detectors.
The fiber coupler is 3dB fiber couplers.
The power detector is high sensitivity photodetector.
The fibre optical sensor is distributed fiberoptic sensor or discrete fibre optical sensor.
The beneficial effects of the invention are as follows：Trigonometric expression optical-fiber intelligent sensing network structure proposed by the present invention can using only
Under the conditions of the passive low cost of a small amount of optical fibre device, the multiplexing quantity of fibre optical sensor is significantly increased, fit structure is simple and easy
The hardware system of realization completes the Intelligent self-diagnosis to sensor network.
Brief description of the drawings
Fig. 1 is a kind of Large Copacity trigonometric expression optical fiber self diagnosis sensing network structure chart.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
As shown in figure 1, the Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure of the present invention, is opened up using trigonometric expression
Structure is flutterred, network node uses between fiber coupler 2, the adjacent fiber coupler 2 of each two and connects through wavelength-division multiplex
Device WDM will sense optical signal access and derived fibre optical sensor 3；Passed while the injection monitoring light of incidence end 1 of system
The monitoring signal receiving terminal of the topological mechanism of sense is provided with multiple power detectors 4.
The fiber coupler 2 is 3dB fiber couplers.
The power detector 4 is high sensitivity photodetector.
The fibre optical sensor 3 is distributed fiberoptic sensor or discrete fibre optical sensor.
The implementation of the Large Copacity trigonometric expression optical fiber self diagnosis sensing network structure of the present invention：First, whole network
The sensitivity of scale and receiving terminal photodetector has together decided on the incident intensity of monitoring signal light, and (Fig. 1 show 7 layer networks
Structure), the number of plies is more, and luminous power is higher.Monitoring light travels through whole topological structure after entering Sensor Network from incidence end, final to import
The photodetector of receiving terminal, and cause each fiber segment in Sensor Network to have power contribution for each detector array of receiving terminal
On uniqueness, be that the structure can realize the theoretical foundation of self diagnosis, by host computer programming realization to detector receive work(
The analysis of rate, so as to draw certain section of optical fiber being specifically broken.In practical operation, because various losses and WDM presence cause respectively
Section optical fiber is variant to the contribution margin of detector power, it is assumed that detector sensitivity is sufficiently high, then detector array can be known
Do not go out the fracture of any section optical fiber.It is pointed out that exist in network it is very a small number of it is several in theory of fiber to detector
The contribution margin of array is identical, in the case where detector sensitivity is not enough, should avoid using this several sections of optical fiber.Except this with
Outside, the luminous power that flows through of other optical fiber is unique for the contribution of detector receiving power.Such a method features simple structure is easy
Row, operating point list, cost are relatively low, can carry out large-scale networking for fibre optical sensor and use.
The present invention uses trigonometric expression topological structure, and network node uses three-dB coupler, the adjacent fiber coupling of each two
Connection optical fiber between device leads to as the sensor fibre of distributed fiberoptic sensor or the loading position of discrete fibre optical sensor
Optical signal access and export will be sensed using WDM i.e. wavelength division multiplexer by crossing.System incidence end injection monitoring light while
The monitoring signal receiving terminal of topological structure is provided with multiple power detectors, and the system can judge to detect in Sensor Network by analysis
Light intensity variable quantity received by device array and derive the position of failure point in Sensor Network, this be control system realize failure from
The foundation of diagnosis.Because each section of optical fiber in net is all unique for the power contribution value for receiving end detector, so when biography
When a certain section of optical fiber or sensor degradation cause control signal can not continue to be transported down to up to correspondence detector in sense net, pass through
Calculate the trouble point that the performance number that accordingly each detector is lost counter can be released in Sensor Network, and automatic alarm.At the same time,
Each fibre optical sensor can utilize wavelength division multiplexer normal work in Sensor Network, be independent of each other.
In summary, present disclosure is not limited in the above embodiments, and the knowledgeable people in same area can
Can propose other embodiments easily within the technological guidance's thought of the present invention, but this embodiment is included in this hair
Within the scope of bright.
Claims (4)
1. a kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure, it is characterised in that using trigonometric expression topology knot
Structure, network node uses between fiber coupler (2), the adjacent fiber coupler of each two (2) and connects through wavelength-division multiplex
Device WDM will sense optical signal access and derived fibre optical sensor (3)；While incidence end (1) the injection monitoring light of system
Multiple power detectors (4) are provided with the monitoring signal receiving terminal of the topological mechanism of sensing.
2. Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure according to claim 1, it is characterised in that described
Fiber coupler (2) is 3dB fiber couplers.
3. Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure according to claim 1, it is characterised in that described
Power detector (4) is high sensitivity photodetector.
4. Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure according to claim 1, it is characterised in that described
Fibre optical sensor (3) is distributed fiberoptic sensor or discrete fibre optical sensor.
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| CN201710461939.1A CN107144300A (en) | 2017-06-19 | 2017-06-19 | A kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116448282A (en) * | 2023-06-16 | 2023-07-18 | 应急管理部沈阳消防研究所 | Fault self-diagnosis method of fluorescent optical fiber temperature measurement sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030072056A1 (en) * | 2001-10-12 | 2003-04-17 | Takeshi Ota | Wavelength division multiplexer and wavelength division multiplexing system |
| CN102291180A (en) * | 2011-06-27 | 2011-12-21 | 天津大学 | Method for designing extensible triangular optical fiber sensing network with high reliability |
| CN206862395U (en) * | 2017-06-19 | 2018-01-09 | 中国石油集团渤海钻探工程有限公司 | A kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure |
-
2017
- 2017-06-19 CN CN201710461939.1A patent/CN107144300A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030072056A1 (en) * | 2001-10-12 | 2003-04-17 | Takeshi Ota | Wavelength division multiplexer and wavelength division multiplexing system |
| CN102291180A (en) * | 2011-06-27 | 2011-12-21 | 天津大学 | Method for designing extensible triangular optical fiber sensing network with high reliability |
| CN206862395U (en) * | 2017-06-19 | 2018-01-09 | 中国石油集团渤海钻探工程有限公司 | A kind of Large Copacity trigonometric expression passive fiber self diagnosis sensing network structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116448282A (en) * | 2023-06-16 | 2023-07-18 | 应急管理部沈阳消防研究所 | Fault self-diagnosis method of fluorescent optical fiber temperature measurement sensor |
| CN116448282B (en) * | 2023-06-16 | 2023-09-01 | 应急管理部沈阳消防研究所 | Fault self-diagnosis method of fluorescent optical fiber temperature measurement sensor |
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