CN106678550A - Water pipe leakage monitoring device and monitoring method based on distributed optical fiber sensing - Google Patents
Water pipe leakage monitoring device and monitoring method based on distributed optical fiber sensing Download PDFInfo
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- CN106678550A CN106678550A CN201611091768.XA CN201611091768A CN106678550A CN 106678550 A CN106678550 A CN 106678550A CN 201611091768 A CN201611091768 A CN 201611091768A CN 106678550 A CN106678550 A CN 106678550A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a water pipe leakage monitoring device and monitoring method based on distributed optical fiber sensing. The water pipe leakage monitoring device comprises a light source module, a wavelength division multiplexing module, a sensing optical fiber, a photoelectric conversion module, a signal processing module and a monitoring module. The light source module is connected with the wavelength division multiplexing module and the signal processing module. One end of the sensing optical fiber is connected with the wavelength division multiplexing module. The two input ends of the photoelectric conversion module are connected with the two output ends of the wavelength division multiplexing module. The two output ends of the photoelectric conversion module are connected with the two input ends of the signal processing module. The output end of the signal processing module is connected with the monitoring module. According to the water pipe leakage monitoring device based on distributed optical fiber sensing and the monitoring method, the sensing optical fiber is laid at the position below a water pipe, the tap water leakage phenomenon can be effectively detected, the leaking location can be positioned in time, the trouble of manual troubleshooting is saved, and losses and damage are reduced.
Description
Technical field
The invention belongs to water pipe monitoring field, more particularly to a kind of pipe leakage monitoring dress based on distributing optical fiber sensing
Put and monitoring method, belong to the pipe leakage monitoring device and the innovative technology of monitoring method based on distributing optical fiber sensing.
Background technology
Global water resources worsening shortages have been undisputable facts, and China's water resource is especially deficient, the saving of water resource with
Using the development for being related to country, the water resource loss that the leakage of feed pipe network is caused is also very serious.China's urban water supply
Pipe network is leaked in addition to causing water resource waste because leakage loss rate is 16.23%. water supply networks, also add output, this
Sample just improves the capital cost and operating cost of water facilities.If leakage point cannot be processed always, also result in
Secondary disaster.Additionally, pipeline network leak produces negative pressure, make outside ring enter pipeline, cause colony to pollute.As can be seen here, supply water
The leakage of pipe network causes the waste of water resource and potentially hazardous, and directly affects the quality of life of resident, increase controlling the water circulation into
This.
At present both at home and abroad widely used leak hunting method is that sound listens detection method, and it is exactly to listen equipment in pipeline using sound that sound listens method
Valve or pipe line other place find leakage and leak source is positioned.This method can only find 80% subsoil water
The leakage point of pipe.Due to the noise of surrounding, pipe material, pore size factor, it is big by the leak sound of listening device
It is little to receive certain interference.Therefore the method is mainly carried out at night.But, water pipe is buried it is deep where, sound listens method
Often cannot get accurate information, a prominent shortcoming of this method is exactly that detection range is little, the cycle is long.
The content of the invention
For above-mentioned the deficiencies in the prior art, the invention provides a kind of pipe leakage based on distributing optical fiber sensing is supervised
Survey device.The present invention can effectively monitor pipe leakage phenomenon, the place of real-time positioning leakage, remove the fiber crops of artificial investigation from
It is tired.And it is positioning precision height, measurement distance length, easy to use.
It is a further object of the present invention to provide a kind of monitoring of the pipe leakage monitoring device based on distributing optical fiber sensing
Method.The present invention can carry out on-line monitoring to water pipe, and monitoring range covers the main trunk road of whole water pipe, effectively saves
Human resourcess.
The technical scheme is that：The pipe leakage monitoring device of the distributing optical fiber sensing of the present invention, including light source
Module, Wavelength division multiplexing module, sensor fibre, photoelectric conversion module, signal processing module and monitoring module, wherein light source module point
It is not connected with Wavelength division multiplexing module and signal processing module, one end connection Wavelength division multiplexing module of sensor fibre, opto-electronic conversion mould
Two inputs of block are connected respectively with two outfans of Wavelength division multiplexing module, two outfans difference of photoelectric conversion module
It is connected with two inputs of signal processing module, the outfan of signal processing module is connected with monitoring module.
The monitoring method of distributed optical fiber sensing monitoring pipe leakage device of the present invention, including having the following steps：
1）Light source module to Wavelength division multiplexing module launches pulsed light, and pulsed light injects sensor fibre, light through Wavelength division multiplexing module
Source module sends out a lock-out pulse light to signal processing module simultaneously；
2）Pulsed light along sensor fibre onwards transmission when, except stokes light, constantly there is anti-Stokes light, wavelength-division multiplex mould
Block is passed to respectively two inputs of photoelectric conversion module by stokes light and anti-Stokes light；
3）Two inputs of photoelectric conversion module gather respectively stokes light and anti-Stokes light, and photoelectric conversion module
Two ways of optical signals is converted into into two path signal；
4）Signal processing module is acquired to the two path signal that photoelectric conversion module is transmitted, using this two path signal
Ratio demodulate temperature information, meanwhile, signal processing module calculate the light source module pulsed light for sending and the photoelectricity for receiving
The speed that the time difference and light of the optical signal that modular converter is transmitted is propagated in sensor fibre, and information transmission to monitoring
Module；
5）Main control server in monitoring module judges whether water pipe leaks according to the signal that signal processing module sends, and leads to
The waveform that display recalls relevant position is crossed, from waveform change the place of pipe leakage is told.
The present invention compared with prior art, with following remarkable advantage：
1）The present invention lays optical fiber on the outside of water pipe, can effectively monitor pipe leakage phenomenon, the place of real-time positioning leakage,
Remove the trouble of artificial investigation from, when pipe leakage is monitored, can be reported to the police in time, reduce loss and endanger.
2）The present invention can carry out on-line monitoring to water pipe, and monitoring range covers the main trunk road of whole water pipe, has
Effect saves human resourcess.
3）The present invention carries out real-time monitoring using sensor fibre to water pipe, exception and alarm occurs, with positioning precision
Height, measurement distance length, advantage easy to use.
Description of the drawings
Fig. 1 is the structural representation of distributed optical fiber sensing monitoring pipe leakage device proposed by the present invention.
Specific embodiment
The structural representation of distributed optical fiber sensing monitoring pipe leakage device of the present invention is as shown in figure 1, including light source
Module, Wavelength division multiplexing module, sensor fibre, photoelectric conversion module, signal processing module and monitoring module, wherein light source module point
It is not connected with Wavelength division multiplexing module and signal processing module, one end connection Wavelength division multiplexing module of sensor fibre, opto-electronic conversion mould
Two inputs of block are connected respectively with two outfans of Wavelength division multiplexing module, two outfans difference of photoelectric conversion module
It is connected with two inputs of signal processing module, the outfan of signal processing module is connected with monitoring module.
In the present embodiment, the sensor fibre is laid in the lower section of water pipe, can be located at the lower outside of water pipe, or positioned at water
The bottom of pipe.
In order to be able to effective protection sensor fibre, prevent sensor fibre to be destroyed, be cased with protecting wire casing on the sensor fibre,
The lower section of water pipe is placed on, the lower outside of water pipe is can be located at, or positioned at the bottom of water pipe.In the present embodiment, the sense light
Fibre adopts distribution type fiber-optic.
In the present embodiment, the monitoring module includes main control server, display screen, and main control server connects with display screen
Connect.
Additionally, the monitoring module is additionally provided with alarm device, main control server is connected with alarm device.By dress of reporting to the police
Put and send alarm, remind staff there are abnormal conditions, so as to reach the effect of monitoring, reduce loss and endanger.
In addition, the sensor fibre outside is packaged with ultra-violet curing acrylic resin coating, further to realize sense light
Fine protection.
The monitoring method of distributed optical fiber sensing monitoring pipe leakage device of the present invention, including having the following steps：
1）Light source module to Wavelength division multiplexing module launches pulsed light, and pulsed light injects sensor fibre, light through Wavelength division multiplexing module
Source module sends out a lock-out pulse light to signal processing module simultaneously；
2）Pulsed light along sensor fibre onwards transmission when, except stokes light, constantly there is anti-Stokes light, wavelength-division multiplex mould
Block is passed to respectively two inputs of photoelectric conversion module by stokes light and anti-Stokes light；
3）Two inputs of photoelectric conversion module gather respectively stokes light and anti-Stokes light, and photoelectric conversion module
Two ways of optical signals is converted into into two path signal；
4）Signal processing module is acquired to the two path signal that photoelectric conversion module is transmitted, using this two path signal
Ratio demodulate temperature information, meanwhile, signal processing module calculate the light source module pulsed light for sending and the photoelectricity for receiving
The speed that the time difference and light of the optical signal that modular converter is transmitted is propagated in sensor fibre, and information transmission to monitoring
Module；
5）Main control server in monitoring module judges whether water pipe leaks according to the signal that signal processing module sends, and leads to
The waveform that display recalls relevant position is crossed, from waveform change the place of pipe leakage is told.And situation is fed back to into user
Terminal, completes the safety monitoring to water pipe.
In the present embodiment, the monitoring module is additionally provided with alarm device, and main control server is connected with alarm device, passes through
Alarm device sends alarm, reminds staff to have abnormal conditions, so as to reach the effect of monitoring, reduces loss and endangers.
The operation principle of the present invention：Light-pulse generator is launched to Wavelength division multiplexing module by light source module, pulsed light is through ripple
Point Multiplexing module injection sensor fibre, pulsed light along sensor fibre onwards transmission while constantly have Raman back-scattered light to believe
Number, information of the Raman scattering optical signal with optical fiber temperature along the line.Scattered light signal is separated two parts by Wavelength division multiplexing module, point
Supplementary biography converts optical signals into the signal of telecommunication to two-way photoelectric conversion module, photoelectric conversion module, by signal processing module to electricity
Signal is acquired, and using the ratio of this two parts signal of telecommunication temperature information is demodulated.While light source sends pulse signal to
Signal processing module sends out a synchronizing signal, sends light pulse by calculating and receives the time difference and light of optical signal in optical fiber
The speed of middle propagation just can be positioned to anomalous event.Final computer judges whether water pipe is let out according to the signal for collecting
Leakage, and situation is fed back to into user terminal, complete the safety monitoring to water pipe.
Detection sensitivity and spatial resolution are a pair amounts for mutually restricting, and they are relevant with the pulsewidth of light signal.It is empty
Between resolution be that wherein c is the speed that light is propagated in a vacuum with the relation of pulsewidth, T is light signal pulsewidth, and n is that light is long and slender
The refractive index of core, L is spatial resolution.For example：The water pipe of monitoring 10km length, when light source is to silica optical fiber injection pulsewidth
During the light pulse of 5ns, theoretical spatial resolution rate is 0.8m.When light source increases to 10ns to silica optical fiber injection pulsewidth,
Because the light impulse length for transmitting in a fiber also increases to therewith 2m by 1m, the light pulse signal in optical fiber and medium molecule phase
Interaction time is elongated, and backscattered luminous power is stronger, and detection sensitivity is also higher, but the at the same time spatial discrimination of system
Rate is also reduced to 1.6m by 0.8m.Optimal light impulse length can be selected by testing in the middle of actual.
Embodiment described above only represents the embodiment of invention, and its description is more concrete and detailed, but is not understood that
For limitation of the scope of the invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the present invention
On the premise of design, some deformations and improvement can also be made, these belong to the scope of the present invention.
Claims (9)
1. a kind of distributed optical fiber sensing monitoring pipe leakage device, it is characterised in that including light source module, Wavelength division multiplexing module,
Sensor fibre, photoelectric conversion module, signal processing module and monitoring module, wherein light source module respectively with Wavelength division multiplexing module and
Signal processing module connects, one end connection Wavelength division multiplexing module of sensor fibre, two inputs difference of photoelectric conversion module
It is connected with two outfans of Wavelength division multiplexing module, two outfans of photoelectric conversion module are respectively with the two of signal processing module
Individual input connection, the outfan of signal processing module is connected with monitoring module.
2. distributed optical fiber sensing monitoring pipe leakage device according to claim 1, it is characterised in that：The sense light
Fibre is laid in the lower section of water pipe.
3. distributed optical fiber sensing monitoring pipe leakage device according to claim 1, it is characterised in that：The sense light
It is cased with protecting wire casing on fibre, is placed on the lower section of water pipe.
4. distributed optical fiber sensing monitoring pipe leakage device according to claim 1, it is characterised in that：The sense light
Fibre adopts distribution type fiber-optic.
5. distributed optical fiber sensing monitoring pipe leakage device according to claim 1, it is characterised in that：The sense light
Fine outside is packaged with ultra-violet curing acrylic resin coating, to realize the protection of sensor fibre.
6. the distributed optical fiber sensing monitoring pipe leakage device according to any one of claim 1 to 5, it is characterised in that：
The monitoring module includes main control server, display screen, and main control server is connected with display screen.
7. distributed optical fiber sensing monitoring pipe leakage device according to claim 6, it is characterised in that：The monitoring mould
Block is additionally provided with alarm device, and main control server is connected with alarm device.
8. a kind of monitoring method of distributed optical fiber sensing monitoring pipe leakage device, it is characterised in that including having the following steps：
1）Light source module to Wavelength division multiplexing module launches pulsed light, and pulsed light injects sensor fibre, light through Wavelength division multiplexing module
Source module sends out a lock-out pulse light to signal processing module simultaneously；
2）Pulsed light along sensor fibre onwards transmission when, except stokes light, constantly there is anti-Stokes light, wavelength-division multiplex mould
Block is passed to respectively two inputs of photoelectric conversion module by stokes light and anti-Stokes light；
3）Two inputs of photoelectric conversion module gather respectively stokes light and anti-Stokes light, and photoelectric conversion module
Two ways of optical signals is converted into into two path signal；
4）Signal processing module is acquired to the two path signal that photoelectric conversion module is transmitted, using this two path signal
Ratio demodulate temperature information, meanwhile, signal processing module calculate the light source module pulsed light for sending and the photoelectricity for receiving
The speed that the time difference and light of the optical signal that modular converter is transmitted is propagated in sensor fibre, and information transmission to monitoring
Module；
5）Main control server in monitoring module judges whether water pipe leaks according to the signal that signal processing module sends, and leads to
The waveform that display recalls relevant position is crossed, from waveform change the place of pipe leakage is told.
9. the monitoring method of distributed optical fiber sensing monitoring pipe leakage device according to claim 8, it is characterised in that：
The monitoring module is additionally provided with alarm device, and main control server is connected with alarm device, and by alarm device alarm is sent, and carries
Awake staff has abnormal conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611091768.XA CN106678550A (en) | 2016-12-01 | 2016-12-01 | Water pipe leakage monitoring device and monitoring method based on distributed optical fiber sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091768.XA CN106678550A (en) | 2016-12-01 | 2016-12-01 | Water pipe leakage monitoring device and monitoring method based on distributed optical fiber sensing |
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| CN106678550A true CN106678550A (en) | 2017-05-17 |
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ID=58867387
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| CN201611091768.XA Pending CN106678550A (en) | 2016-12-01 | 2016-12-01 | Water pipe leakage monitoring device and monitoring method based on distributed optical fiber sensing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108645501A (en) * | 2018-08-09 | 2018-10-12 | 平湖波汇通信科技有限公司 | One kind being based on distributing optical fiber sensing water pipe operation monitoring system |
| CN108980639A (en) * | 2018-08-09 | 2018-12-11 | 平湖波汇通信科技有限公司 | A kind of gas leakage monitoring system based on Distributed Optical Fiber Sensing Techniques |
| CN109764246A (en) * | 2019-03-14 | 2019-05-17 | 广东聚源管业实业有限公司 | A kind of pipe joint monitoring of leakage system and method |
| CN113669635A (en) * | 2021-07-19 | 2021-11-19 | 安徽复盛信息科技有限公司 | DVS optical fiber vibration sensing-based water supply pipeline leakage monitoring method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645501A (en) * | 2018-08-09 | 2018-10-12 | 平湖波汇通信科技有限公司 | One kind being based on distributing optical fiber sensing water pipe operation monitoring system |
| CN108980639A (en) * | 2018-08-09 | 2018-12-11 | 平湖波汇通信科技有限公司 | A kind of gas leakage monitoring system based on Distributed Optical Fiber Sensing Techniques |
| CN109764246A (en) * | 2019-03-14 | 2019-05-17 | 广东聚源管业实业有限公司 | A kind of pipe joint monitoring of leakage system and method |
| CN109764246B (en) * | 2019-03-14 | 2020-09-29 | 广东聚源管业实业有限公司 | Pipeline interface leakage monitoring method |
| CN113669635A (en) * | 2021-07-19 | 2021-11-19 | 安徽复盛信息科技有限公司 | DVS optical fiber vibration sensing-based water supply pipeline leakage monitoring method |
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Application publication date: 20170517 |