CN111089646A - Method for detecting position of pipeline external water entering buried pipeline or hidden culvert by using distributed optical fiber - Google Patents
Method for detecting position of pipeline external water entering buried pipeline or hidden culvert by using distributed optical fiber Download PDFInfo
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- CN111089646A CN111089646A CN201911333573.5A CN201911333573A CN111089646A CN 111089646 A CN111089646 A CN 111089646A CN 201911333573 A CN201911333573 A CN 201911333573A CN 111089646 A CN111089646 A CN 111089646A
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- pipeline
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- culvert
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
Abstract
The invention provides a method for detecting the position of pipeline external water entering a buried pipeline or a dark culvert by using a distributed optical fiber, wherein the front end of the distributed optical fiber is connected with a corresponding analyzer, and the tail end of the distributed optical fiber is fixed on a floater, and the method comprises the following steps: (1) the distributed optical fiber with the tail end fixed with the floater is applied to the inspection well at the upstream of the pipeline or the dark culvert, and the optical fiber is driven by the floater to flow downstream along with water flow in the pipeline or the dark culvert to reach the expected length or reach the preset position; (2) the analyzer measures the temperature or/and vibration of water in the pipeline or the dark culvert at certain intervals; (3) and judging whether the water outside the pipeline enters the position nearby according to the vibration or/and the water temperature of the water at the measuring position, and determining the position of the water outside the pipeline entering the pipeline or the hidden culvert on the ground according to the length of the optical fiber of the position away from the upstream inspection well. The method is simple to operate, and can solve the problem of detecting the position of the pipeline where the outside water enters the buried pipeline or the hidden culvert under the full water state or the extremely poor perspective condition.
Description
Technical Field
The invention relates to a method for detecting the position of underground water outside a pipeline or other pipeline water entering a buried pipeline or a hidden culvert, which is suitable for detecting the entry point and the position of the external water of the buried pipeline when municipal pipelines such as sewage pipes, rainwater pipes, hidden culverts and the like are inspected.
Background
When the urban underground pipeline is damaged or the joint connection is poor, underground water outside the pipeline enters the pipeline and the hidden culvert below the underground water level through the damaged position or the poor connection position; there may also be some other pipes connected to the pipe or culvert, such as a storm sewer connected to a sewer; the two conditions can lead to the increase of sewage treatment capacity, seriously affect the treatment efficiency of a sewage treatment station and are the main purposes of rain and sewage separation of the current municipal drainage pipe network. When urban ecological management and origin correction are carried out, the position of sewer or rainwater outside the pipeline, which enters the pipeline and a dark culvert, must be found out so as to implement pipeline damage plugging or rain and sewage separation construction. At present, a pipeline seepage inspection method generally adopts a pipeline robot (pipeline CCTV) to enter a pipeline or a dark culvert (because personnel cannot enter), whether external water enters or the pipeline is accessed is observed by shooting an image in the pipeline or the dark culvert, and only seepage water and an external water receiving pipe in a space above a water level in the pipeline can be inspected due to extremely poor sewage perspective in a drainage pipeline; when the pipeline is full of water, the pipeline cannot be checked; it is not found when the permeated water is below the water level. The pipeline robot is adopted to inspect the pipeline, so that the efficiency is low, the cost is high, and the pipeline robot is limited by various conditions such as water level in the pipeline and siltation, and can not be effectively inspected frequently.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for detecting the position of the pipeline external water entering the buried pipeline or the dark culvert by using the distributed optical fibers is provided, so as to solve the problem of detecting the position of the pipeline external water entering the buried pipeline or the dark culvert under the full water state or the extremely poor perspective condition. Therefore, the invention adopts the following technical scheme:
a method for detecting the location of water entering a buried pipeline or culvert from outside the pipeline using a distributed optical fiber capable of sensing vibration and/or temperature, the distributed optical fiber having a front end connected to a corresponding analyzer, the analyzer being a vibration analyzer, a temperature analyzer or a vibration and temperature analyzer using Optical Time Domain Reflectometry (OTDR), the distributed optical fiber having a distal end fixed to a float, the method comprising the steps of:
(1) the distributed optical fiber with the tail end fixed with the floater is applied to the inspection well at the upstream of the pipeline or the dark culvert, and the optical fiber is driven by the floater to flow downstream along with water flow in the pipeline or the dark culvert to reach the expected length or reach the preset position;
(2) the analyzer measures the temperature or/and vibration of water in the pipeline or the dark culvert at certain intervals;
(3) and judging whether the water outside the pipeline enters the position nearby according to the vibration or/and the water temperature of the water at the measuring position, and determining the position of the water outside the pipeline entering the pipeline or the hidden culvert on the ground according to the length of the optical fiber of the position away from the upstream inspection well.
When no external water enters the pipeline, the temperature of the water upstream and downstream in the pipeline is basically the same, and the fluctuation (vibration) of the water flow is relatively smooth.
When water outside the pipeline enters a certain position in the pipeline, the water outside the pipeline generates water flow shock waves (vibration), in addition, the water outside the pipeline (underground water or other pipeline water) and the water inside the pipeline are different in source and generally have temperature difference, the water outside the pipeline enters the pipeline to cause water temperature change (the temperature difference exists between two streams of water generally), if the water outside temperature is higher, the water temperature in the pipeline rises, and if the water outside temperature is lower, the water temperature in the pipeline falls. Therefore, the water flow shock wave (vibration) and the water temperature change in the pipeline within a certain pipeline length range are continuously measured, the water flow shock wave (vibration) and the water temperature and the change condition of each measuring point are analyzed, the position where the water flow shock wave (vibration) is large or the water temperature has obvious change can be judged, the position where the water outside the pipeline enters can be determined (the positioning precision is +/-1 m), and the water quantity entering the pipeline can be roughly analyzed according to the water flow shock wave (vibration) strength, the temperature change amplitude and the range.
The distributed optical fiber is connected with a vibration/temperature analyzer, and the shock wave (vibration) and the temperature of the external water entering part are actually measured through the optical fiber and are different from those of the part without the external water entering part. If the flow of the external entering water flow is large, the flow speed is high or the water flows are suspended from the top and the side wall of the pipeline, the water flow shock wave (vibration) is large; when the flow of the water flow entering from the outside is large and the temperature difference is large, the water temperature changes greatly.
The steps of the method are carried out in rainy days or after rains at the optimal time. If necessary, different water inflow time intervals in sunny days and rainy days can be selected for comparison detection, detection results can be mutually verified, and signal noise points are eliminated.
The method can determine the position by only adopting vibration sensing measurement or only adopting temperature sensing measurement, or can determine and verify the position and eliminate the noise of a measurement signal by respectively carrying out vibration sensing measurement and temperature sensing measurement; or the same repeated mode can be adopted, namely repeated vibration sensing measurement or repeated temperature sensing measurement is used for judging and verifying the position and eliminating the noise of the measurement signal; and vibration sensing measurement and temperature sensing measurement can be adopted at the same time, and the position of the pipeline where the outside water enters the buried pipeline or the hidden culvert can be judged in an OR mode or a AND mode according to the characteristics of the signals.
When the optical fiber is discharged, the length of the released optical fiber reaches a preset position (observed from a downstream inspection well) and is fixed according to actual needs, wherein the length of the released optical fiber is tens of meters or even kilometers. The analyzer then measures the temperature or/and vibration of the water in the pipe or culvert at intervals, which may be set to 0.5m, 1m, etc., using Optical Time Domain Reflectometry (OTDR).
Further, the distributed optical fiber can adopt an armored distributed optical fiber to enhance the strength, or can adopt a mode of binding other high-strength ropes in parallel to enhance the strength without influencing the sensing.
The float may be a foam block or other buoyant device. In the middle of the distributed fiber, the buoyant structure can also be bundled or otherwise fixed without affecting sensing.
The invention determines the position of the water flow outside the pipeline or other pipeline water entering the buried pipeline and the hidden culvert by continuously measuring and analyzing the water flow shock wave (vibration) or/and the water temperature in the pipeline with a section of length, solves the problem of detecting the position of the water flow outside the pipeline entering the pipeline under the conditions of full pipe flow, thick siltation and the like in the pipeline, has high detection efficiency (tens of meters to kilometers can be detected at one time), has high detection precision (the positioning precision can reach +/-1 m), and provides a foundation for municipal drainage pipe culvert treatment and rain and sewage separation construction.
Drawings
FIG. 1 is a schematic diagram of the method of detecting the location of water entering the pipeline from outside the pipeline according to the present invention.
Detailed Description
Reference is made to the accompanying drawings. The invention relates to a method for detecting the position of a pipeline where outside water enters a buried pipeline or a dark culvert by using a distributed optical fiber 1 capable of sensing vibration or/and temperature, wherein the optical fiber is an armored distributed optical fiber, the front end of the distributed optical fiber 1 is connected with a corresponding analyzer 2, the analyzer correspondingly adopts a vibration analyzer, a temperature analyzer or a vibration and temperature analyzer according to whether the distributed optical fiber senses vibration or senses temperature or senses vibration, and the tail end of the distributed optical fiber is bound on a foam block 3, and the method comprises the following steps:
(1) the distributed optical fiber 1 with the tail end fixed with the foam block 3 is released in the pipeline 100 or the inspection well 101 at the upstream of the hidden culvert, the optical fiber 1 is driven by the foam block 3 to flow downstream along with water flow in the pipeline 100 or the hidden culvert, and the optical fiber is fixed after the expected length or the preset position is reached.
(2) The analyzer 2 sets a sampling interval (such as 0.5m) according to the highest resolution, and measures the temperature or/and the vibration of water at different positions in a pipeline or a dark culvert;
(3) analyzing the water flow shock wave (vibration) and the water temperature and the change condition of each position in the pipeline, and judging that water outside the pipeline enters at the position where the water flow shock wave (vibration) is large or the water temperature has obvious change.
Determining the length of the optical fiber at the position away from the upstream inspection well 101, and determining the position of the pipeline and the hidden culvert where water outside the pipeline enters the pipeline and the hidden culvert on the ground by combining the position of the upstream inspection well 101 and the extending direction of the pipeline.
According to the water flow shock wave (vibration) intensity, the water temperature change amplitude and the influence range, the quantity of the water inflow outside the pipeline is roughly judged.
The best opportunity for measurement is in rainy days or after rains. If the water inlet quantity outside the pipeline is small, the shock wave (vibration) strength is weak or the water temperature is not changed greatly during the measurement in sunny days, the repeated measurement is carried out in rainy days; comparing and analyzing the two measurement results, and making further judgment.
The above description is only an embodiment of the present invention, and the technical features of the present invention are not limited thereto, and any changes or modifications within the field of the present invention by those skilled in the relevant art are covered by the protection scope of the present invention.
Claims (5)
1. A method for detecting the position of pipeline external water entering a buried pipeline or a hidden culvert by using a distributed optical fiber, which is characterized in that the distributed optical fiber capable of sensing vibration or/and temperature is adopted, the front end of the distributed optical fiber is connected with a corresponding analyzer, the analyzer is a vibration analyzer, a temperature analyzer or a vibration and temperature analyzer, and the tail end of the distributed optical fiber is fixed on a floater, wherein the method comprises the following steps:
(1) the distributed optical fiber with the tail end fixed with the floater is applied to the inspection well at the upstream of the pipeline or the dark culvert, and the optical fiber is driven by the floater to flow downstream along with water flow in the pipeline or the dark culvert to reach the expected length or reach the preset position;
(2) the analyzer measures the temperature or/and vibration of water in the pipeline or the dark culvert at certain intervals;
(3) and judging whether the water outside the pipeline enters the position nearby according to the vibration or/and the water temperature of the water at the measuring position, and determining the position of the water outside the pipeline entering the pipeline or the hidden culvert on the ground according to the length of the optical fiber of the position away from the upstream inspection well.
2. The method of claim 1, wherein the distributed optical fiber is armored distributed optical fiber.
3. A method of detecting the location of the entry of water outside a pipeline into a buried pipeline or culvert using distributed optical fibres as claimed in claim 1 wherein the float is a foam block.
4. A method of detecting the location of water entering a buried pipeline or culvert from outside the pipeline using distributed optical fibre as claimed in claim 1 wherein the analyser measures the temperature or/and vibration of the water in the pipeline or culvert at spaced intervals using Optical Time Domain Reflectometry (OTDR).
5. A method of detecting the location of entry of water outside a pipeline into a buried pipeline or culvert using distributed optical fibres as claimed in claim 1 wherein said steps are performed on or after a rainy day.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810768A (en) * | 2020-06-29 | 2020-10-23 | 武汉理工光科股份有限公司 | Method and device for monitoring running state of pipe cleaner based on distributed optical fiber sensing |
| CN113833989A (en) * | 2021-09-13 | 2021-12-24 | 中建中环工程有限公司 | Device and method for detecting drainage pipeline misconnection or leakage |
| WO2023048580A1 (en) * | 2021-09-27 | 2023-03-30 | Leak Detector As | Flexible elongate members in sewage pipelines or channels |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721484A (en) * | 2012-06-08 | 2012-10-10 | 宁波诺驰光电科技发展有限公司 | Distributed optical fiber sensing device based on brillouin scattering |
| CN104596576A (en) * | 2014-12-26 | 2015-05-06 | 中国石油天然气集团公司 | Optical fiber temperature sensing and vibration sensing collineation fusion system and monitoring method |
| CN106369286A (en) * | 2016-10-28 | 2017-02-01 | 大连理工大学 | Distributed photoelectric integrated active monitoring system and method of long-distance buried pipeline leakage |
| CN107727226A (en) * | 2017-08-31 | 2018-02-23 | 电子科技大学 | The oil-gas pipeline safety detection method perceived based on optical fiber |
| CN207196095U (en) * | 2017-09-15 | 2018-04-06 | 北京为韵科技有限公司 | A kind of distributed optical fiber sensing system for being used for corrosive pipeline and leakage monitoring |
| CN207246799U (en) * | 2017-05-12 | 2018-04-17 | 光蓝科技有限公司 | A kind of pipe leakage fibre-optical temperature sensing monitor |
| CN107917738A (en) * | 2017-12-26 | 2018-04-17 | 南京大学（苏州）高新技术研究院 | A kind of while measurement temperature, strain and the distributed optical fiber sensing system of vibration |
| CN108679457A (en) * | 2018-07-02 | 2018-10-19 | 中国水利水电科学研究院 | The online leak detection apparatus of pressure water pipe and method |
| CN108827445A (en) * | 2018-04-27 | 2018-11-16 | 南京航空航天大学 | A kind of fully distributed fiber vibration sensing method and device |
| CN109210385A (en) * | 2018-06-08 | 2019-01-15 | 张益平 | A kind of distributed optical fiber sensing system and method based on Phase-OTDR |
| CN209296054U (en) * | 2019-01-15 | 2019-08-23 | 广东聚源管业实业有限公司 | A kind of distributed fiber grating detection pipeline and system |
-
2019
- 2019-12-23 CN CN201911333573.5A patent/CN111089646A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721484A (en) * | 2012-06-08 | 2012-10-10 | 宁波诺驰光电科技发展有限公司 | Distributed optical fiber sensing device based on brillouin scattering |
| CN104596576A (en) * | 2014-12-26 | 2015-05-06 | 中国石油天然气集团公司 | Optical fiber temperature sensing and vibration sensing collineation fusion system and monitoring method |
| CN106369286A (en) * | 2016-10-28 | 2017-02-01 | 大连理工大学 | Distributed photoelectric integrated active monitoring system and method of long-distance buried pipeline leakage |
| CN207246799U (en) * | 2017-05-12 | 2018-04-17 | 光蓝科技有限公司 | A kind of pipe leakage fibre-optical temperature sensing monitor |
| CN107727226A (en) * | 2017-08-31 | 2018-02-23 | 电子科技大学 | The oil-gas pipeline safety detection method perceived based on optical fiber |
| CN207196095U (en) * | 2017-09-15 | 2018-04-06 | 北京为韵科技有限公司 | A kind of distributed optical fiber sensing system for being used for corrosive pipeline and leakage monitoring |
| CN107917738A (en) * | 2017-12-26 | 2018-04-17 | 南京大学（苏州）高新技术研究院 | A kind of while measurement temperature, strain and the distributed optical fiber sensing system of vibration |
| CN108827445A (en) * | 2018-04-27 | 2018-11-16 | 南京航空航天大学 | A kind of fully distributed fiber vibration sensing method and device |
| CN109210385A (en) * | 2018-06-08 | 2019-01-15 | 张益平 | A kind of distributed optical fiber sensing system and method based on Phase-OTDR |
| CN108679457A (en) * | 2018-07-02 | 2018-10-19 | 中国水利水电科学研究院 | The online leak detection apparatus of pressure water pipe and method |
| CN209296054U (en) * | 2019-01-15 | 2019-08-23 | 广东聚源管业实业有限公司 | A kind of distributed fiber grating detection pipeline and system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810768A (en) * | 2020-06-29 | 2020-10-23 | 武汉理工光科股份有限公司 | Method and device for monitoring running state of pipe cleaner based on distributed optical fiber sensing |
| CN113833989A (en) * | 2021-09-13 | 2021-12-24 | 中建中环工程有限公司 | Device and method for detecting drainage pipeline misconnection or leakage |
| WO2023048580A1 (en) * | 2021-09-27 | 2023-03-30 | Leak Detector As | Flexible elongate members in sewage pipelines or channels |
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Application publication date: 20200501 |