CN207316486U - A kind of Novel optical cable sensor-based system for pipeline leak detection - Google Patents
A kind of Novel optical cable sensor-based system for pipeline leak detection Download PDFInfo
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- CN207316486U CN207316486U CN201721129769.9U CN201721129769U CN207316486U CN 207316486 U CN207316486 U CN 207316486U CN 201721129769 U CN201721129769 U CN 201721129769U CN 207316486 U CN207316486 U CN 207316486U
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- optical cable
- pipeline
- elastic plate
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- leak detection
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Abstract
The utility model discloses a kind of Novel optical cable sensor-based system for pipeline leak detection, belong to monitoring technology field.The utility model is mainly used for the liquid in pipeline or the automatic detection in real time of gas leakage.The pipeline periphery is connected around inductance loop, inductance loop by connect band with the elastic plate below pipeline, laying sensing optical cable on elastic plate.After impact endurance test shock signal caused by liquid or gas leakage is detected by inductance loop, the sensing optical cable on elastic plate is passed to；Vibration signal is passed back the indoor signal analysis of monitoring by optical cable after being modulated to the laser signal in sensing optical cable and identifies computer system in itself, pass through demodulating algorithm, calculate specific location and signal type that leakage occurs, monitoring personnel accurate failure judgement in real time is helped, carries out corresponding repairing in time.Full-automatic detection in real time is realized in leakage of the utility model to long-distance pipe, can effectively substitute traditional manual inspection, simple to operate, high financial profit, and application prospect is wide.
Description
Technical field
The invention belongs to monitoring technology field, and in particular to a kind of Novel optical cable sensor-based system for pipeline leak detection.
Background technology
In general, pipeline be with pipe, pipe connector and valve etc. be connected into be used for convey gas, liquid or band
The device of the fluid of solid particle.In general, fluid through air blower, compressor, pump and boiler etc. supercharging after, at the high pressure of pipeline
Flow at low pressure, pressure or the gravity conveying of fluid itself can also be used.Since pipeline has high antiwear characteristic, high
Impact resistance, corrosion resistance, good self-lubricity, to biological non-toxicity, unique lower temperature resistance, less scaling property, long lifespan,
The characteristics such as simple installation so that having many uses for pipeline is general, is used primarily in feedwater, draining, heat supply, gives gas, long distance delivery
In oil and natural gas, agricultural irrigation, hydraulic engineering and various commercial plants.
Pipeline is due to the problem of leakage losses caused by factor such as burn into destruction are one commonplace, it will usually causes serious
Economic loss.Therefore, pipe detection becomes more and more important, however, traditional method for detecting pipeline mostly be by manually into
The irregular patrol detection of row, it is not only time-consuming and laborious, and also detection efficiency is not high, and artificial careless omission happens occasionally, and adds pipeline
The cost of detection, is difficult sometimes to determine specific pipe leakage position, and the repairing work to pipeline brings inconvenience, from
And cause the unnecessary waste of resource in pipeline.For above-mentioned technical problem, a kind of full automatic liquid or gas length is invented
Apart from pipeline leak detection method, efficiency is greatly improved, application prospect is very wide.
The Distributed Optical Fiber Sensing Techniques occurred in recent years, optical cable tool very sensitive for the vibration signal near optical cable
Have a longer linear monitoring scope, monitoring distance up to tens kilometers, and with registration, high sensitivity, reliability it is high,
The advantages that strong antijamming capability, adaptable, electromagnetism interference, be particularly suitable for monitoring the various abnormal conditions of long distance line.
Transmission mechanism and laser signal modulation-demo-demodulation method are sensed by appropriate pipe leakage, it is possible to achieve full-automatic real-time monitoring tubular
Abnormal conditions of the road in tens kilometers of any one long places.
By taking traditional optics closed circuit interference ring as an example, the light that laser is sent is clockwise and inverse through 2x2 couplers point
Hour hands both direction enters optics closed circuit, senses optical fiber by disturbing signal and 2x2 couplers converge to detector shape again
Into interference signal.Any disturbance is applied on optics closed circuit, can all cause propagate light phase change Φ (t), and this
By disturbance the position on optics closed circuit and the length of optics closed circuit occur for a time difference changed to up to detector
Determine.Time difference is bigger, and the interference curent change that detector detects is bigger
I (t)=I0(2-2cos(ΔΦ(t)+Φ0)),
ΔΦ (t)=Φ (t-t in above formula1)-Φ(t-t2),L is the length of optics closed circuit
Spend, x is the distance that middle disturbance point arrives 2x2 couplers clockwise, and L-x is disturbance point counter clockwise direction in optics closed circuit
The speed propagated in a fiber for light to the distance of 2x2 couplers, c, I0Detector is defeated from one of coupler during for without interference
The light intensity that outlet receives, Φ0It is initial phase difference, 2x2 couplers will bring the difference of π.
Assuming that the disturbance put on during t=0 on sensor fibre is betided at x；Detector will be after disturbance occurs
Time point observes the change of coherent signal, and another detector will beTime point observes the change of coherent signal.Meter
After calculating (t1-t2), the position for disturbing generation can be by x=(L-c (t1-t2))/2 obtain；Meanwhile disturb the signal that position occurs
Feature can obtain I (t) in real time by high-speed data acquisition equipment, then by special signal mode recognizer come into one
Step demodulates the phase place change ΔΦ (t) of disturbing signal.
The content of the invention
It is an object of the invention to using Distributed Optical Fiber Sensing Techniques, there is provided one kind is used for pipeline liquid or gas leak detection
Full-automatic optical cable sensor-based system, to substitute traditional manual inspection mode, to solve the problems mentioned in the above background technology.
Specifically, the technical solution adopted in the present invention is：
1. a kind of Novel optical cable sensor-based system for being used for pipeline liquid or gas leak detection, pipeline periphery Ambience should
Ring, the inductance loop are hung by the elastic plate below connect band and pipeline and connected, the top laying sensing light of the elastic plate
Cable.After impact endurance test shock signal caused by liquid or gas leakage is detected by inductance loop, elastic plate is delivered to by connect band
Afterwards, cause elastic plate to produce special vibration signal, after which is detected by sensing optical cable, to the laser signal in optical fiber into
Row modulation, modulated optical signalling are transferred back to the indoor signal analysis identification host computer system of monitoring by optical cable, passed through in itself
Demodulating algorithm, calculates specific location and signal type that leakage occurs, and produces corresponding alarm signal and remind staff.
2. further characteristic of the invention is：The inductance loop, connect band, elastic plate use waterproof anti-corrosion material
It is made.
3. further characteristic of the invention is：The inductance loop can partly or entirely be covered according to the actual needs of detection
The detected pipeline of lid.
4. further characteristic of the invention is：The sensing optical cable can be with the distributed vibrations optical cable sensing of any type
Device system connects.
5. further characteristic of the invention is：The sensing optical cable is single mode armored optical cable.
6. further characteristic of the invention is：The length of the elastic plate is 1-5 meters.
7. further characteristic of the invention is：Can horizontally or vertically stagger 5-20cm between adjacent elastic plate.
Compared with prior art, the beneficial effects of the invention are as follows：
1. the present invention is by that in the flexible plate of pipeline junction underhung, can pass through the vibrations of inductance loop or elastic plate
To perceive the drop or gas that pipe leakage goes out, and specific leak position is precisely measured, and alarm, for aerial pipeline
Leakage monitoring there is good application prospect.
2. the combination of the invention by inductance loop and elastic plate, realizes monitored pipeline 360 degree of annular and covers,
So vibration signal caused by the leakage in any one direction, can be detected, almost without any dead angle and blind spot.
3. the present invention can by Distributed Optical Fiber Sensing Techniques, 24 it is small when incessantly real-time monitoring tubular road leak feelings
Condition, single system effective monitoring scope can be up to 100 kilometers, and compared with traditional artificial regular visit, system reliability is significantly
Lifting.
4. the present invention can be creeped dynamic by the design in optical fiber alarm system by algorithm for pattern recognition exclusion mouse etc.
Interference of the thing to pipe detection, greatly increases the precision of detection, significantly reduces the rate of false alarm of system.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of the side view of invention.
In figure：1 pipeline, 2 inductance loops, 3 connect bands, 4 elastic plates, 5 sensing optical cables.
Embodiment
Embodiment one：
As shown in Figures 1 and 2, a kind of Novel optical cable sensor-based system for being used for pipeline liquid or gas leak detection, it is characterized in that,
It includes pipeline (1) periphery and passes through the elasticity below connect band (3) and pipeline (1) around inductance loop (2), the inductance loop (2)
Plate (4) suspension connection, the top laying sensing optical cable (5) of the elastic plate (4).Impact caused by liquid or gas leakage
After vibration signal is detected by inductance loop (2), after being delivered to elastic plate (4) by connect band (3), elastic plate (4) is caused to produce
Special vibration signal, after which is detected by sensing optical cable (5), is modulated the laser signal in optical fiber, after modulation
Optical signalling transfer back to monitoring indoor signal analysis identification host computer system in itself by optical cable, pass through demodulating algorithm, calculate
Go out specific location and signal type that leakage occurs, and produce corresponding alarm signal and remind staff.
The inductance loop (2), connect band (3), elastic plate (4) are made of waterproof anti-corrosion material.
The inductance loop (2) is in 360 degree of pipelines (1) that all covering is detected.
The sensing optical cable (5) is single mode armored optical cable.
The length of the elastic plate (4) is 1~5 meter.
The gap of about 10cm or so is left between adjacent elastic plate (4).
Embodiment two：
Embodiment two is slightly different with embodiment one, its main distinction is:
The tops and both sides for the pipeline (1) that the inductance loop (2) is detected in 320 degree coverings, 40 degree immediately below pipeline
Left and right scope alignment elastic plate (4).
The foregoing is merely the embodiment of the present invention, is not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made, is directly or indirectly used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (7)
1. a kind of Novel optical cable sensor-based system for pipeline leak detection, pipeline (1) periphery is around inductance loop (2), the sense
Ying Huan (2) is hung by the elastic plate (4) below connect band (3) and pipeline (1) and connected, and the top of the elastic plate (4) is applied
If sensing optical cable (5), after impact endurance test shock signal caused by liquid or gas leakage is detected by inductance loop (2), pass through connection
After band (3) is delivered to elastic plate (4), elastic plate (4) is caused to produce special vibration signal, which is examined by sensing optical cable (5)
After measuring, the laser signal in optical fiber is modulated, modulated optical signalling is transferred back in monitoring room in itself by optical cable
Signal analysis identification host computer system, by demodulating algorithm, calculate specific location and signal type that leakage occurs, and produce
Corresponding alarm signal reminds staff.
2. a kind of Novel optical cable sensor-based system for pipeline leak detection according to claim 1, it is characterized in that：The sensing
Ring (2), connect band (3), elastic plate (4) are made of waterproof anti-corrosion material.
3. a kind of Novel optical cable sensor-based system for pipeline leak detection according to claim 1, it is characterized in that：The sensing
Ring (2) can be according to the actual needs pipeline (1) that partly or entirely covering is detected of detection.
4. a kind of Novel optical cable sensor-based system for pipeline leak detection according to claim 1, it is characterized in that：The sensing
Optical cable (5) can be connected with the distributed vibrations optical cable sensing system of any type.
5. a kind of Novel optical cable sensor-based system for pipeline leak detection according to claim 1, it is characterized in that：The sensing
Optical cable (5) is single mode armored optical cable.
6. a kind of Novel optical cable sensor-based system for pipeline leak detection according to claim 1, it is characterized in that：The elasticity
The length of plate (4) is 1~5 meter.
7. a kind of Novel optical cable sensor-based system for pipeline leak detection according to claim 1, it is characterized in that：Adjacent bullet
Can horizontally or vertically stagger 5~20cm between property plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721129769.9U CN207316486U (en) | 2017-09-05 | 2017-09-05 | A kind of Novel optical cable sensor-based system for pipeline leak detection |
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| CN201721129769.9U CN207316486U (en) | 2017-09-05 | 2017-09-05 | A kind of Novel optical cable sensor-based system for pipeline leak detection |
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| CN207316486U true CN207316486U (en) | 2018-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486576A (en) * | 2018-05-07 | 2018-09-04 | 北京碧海舟腐蚀防护工业股份有限公司 | flexible anode and detecting system |
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2017
- 2017-09-05 CN CN201721129769.9U patent/CN207316486U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486576A (en) * | 2018-05-07 | 2018-09-04 | 北京碧海舟腐蚀防护工业股份有限公司 | flexible anode and detecting system |
| CN108486576B (en) * | 2018-05-07 | 2023-09-29 | 北京碧海云智新材料技术有限公司 | Flexible anode and detection system |
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