CN116719138B - Optical fiber laying equipment, underground pipeline positioning method and system - Google Patents
Optical fiber laying equipment, underground pipeline positioning method and system Download PDFInfo
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- CN116719138B CN116719138B CN202310973670.0A CN202310973670A CN116719138B CN 116719138 B CN116719138 B CN 116719138B CN 202310973670 A CN202310973670 A CN 202310973670A CN 116719138 B CN116719138 B CN 116719138B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 392
- 238000000034 method Methods 0.000 title claims abstract description 72
- 230000005284 excitation Effects 0.000 claims abstract description 220
- 238000003860 storage Methods 0.000 claims abstract description 107
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims description 37
- 238000009933 burial Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000005516 engineering process Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000035939 shock Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 14
- 238000005553 drilling Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 230000006378 damage Effects 0.000 description 11
- 238000012545 processing Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
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- 238000004891 communication Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
-
- 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
Abstract
An optical fiber laying device, an underground pipeline positioning method and system, comprising: the optical fiber storage box, the optical fiber positioning box and the optical fiber sensor; one end of the optical fiber sensor is fixed in the optical fiber storage box, and the other end of the optical fiber sensor is fixed on the optical fiber positioning box; the optical fiber laying apparatus has two operating states: when the optical fiber storage box is used for measurement, the optical fiber storage box and the optical fiber positioning box are respectively positioned at the starting point and the end point of the underground pipeline to be measured; the optical fiber sensor is used for receiving excitation signals emitted by excitation sources which are pre-arranged in the underground pipeline to be tested; when the optical fiber storage box is retracted, the optical fiber sensor is arranged in the optical fiber storage box, and the optical fiber storage box is connected with the optical fiber positioning box; the optical fiber sensor in the optical fiber laying equipment can detect excitation signals in underground pipelines with different sizes, different types and different detection requirements, and the limitation of the existing positioning method is effectively solved by combining the positioning method of the underground pipelines, and the positioning precision is improved.
Description
Technical Field
The invention relates to the field of geotechnical engineering underground pipeline detection, in particular to optical fiber layout equipment, an underground pipeline positioning method and an underground pipeline positioning system.
Background
Along with the acceleration of the urban process, the construction and development of underground pipelines are rapid. The urban underground pipe network is a complicated space system consisting of crisscrossed electric power, water supply, water discharge, gas, heat, telecommunication and industrial pipe networks, and is responsible for energy transportation, information transmission and other works, and is a material foundation for survival and development of cities. However, because people grasp the position of the urban underground pipe network inaccurately, pipeline damage accidents occur during construction, and the consequences of power failure, water cut, gas cut, communication interruption and the like are caused, so that the urban development and the normal life of people are seriously affected.
The causes of the damage to the underground pipeline are mainly as follows:
the urban underground pipeline is constructed by adopting non-excavation methods such as horizontal directional drilling and the like when passing through roads, river and building construction, and the construction method needs to control the construction drilling direction by means of a ground direction control device. During construction, an electromagnetic signal is transmitted by a transmitter arranged on a construction drill bit, and after the ground control device receives the signal, the position and the direction of the drill bit can be mastered in real time through interpretation, so that drilling is accurately controlled. However, in a complex urban underground environment, electromagnetic signals emitted by a drill bit are extremely easy to be interfered by structures containing ferromagnetic materials, such as adjacent metal pipelines, cables, steel-concrete structures and the like, in the underground propagation process, so that a ground direction control device cannot effectively receive signals or signal distortion in a part of a section, the construction is in a blind drilling state in the section, and people cannot accurately know the actual arrangement position of the underground pipelines.
After the urban underground pipeline laid in the soft soil area is put into use for a long time or is disturbed by adjacent stratum, the stratum is subjected to creep, sliding and deformation, so that the position of the underground pipeline in the urban underground pipeline is changed and deviates from the original pipeline recording position.
At the present stage, accidents such as investigation drilling, piling, underground non-excavation drilling and the like at the earlier stage of engineering occur when underground pipelines are damaged by nearby construction, and the root cause is that the existing underground pipelines, particularly nonmetallic pipelines, are difficult to accurately position by utilizing the existing method and equipment. The existing common underground pipeline positioning methods include a drilling detection method, an electromagnetic induction method, a geological radar method, an inertial gyroscope method and the like.
In the prior art, a method of detecting the position of an underground pipeline by drilling downwards from the ground is adopted; when in detection, firstly, on-site investigation is carried out on a drag pipe to be detected, and the approximate position and depth of the underground pipeline are preliminarily determined based on original record data; and selecting exploration points near the pipeline, performing drilling detection from far to near, and determining the burial depth and the position of the pipeline through the drilling detection. The determination of the position of an underground pipeline by adopting a drilling method is a relatively direct underground pipeline positioning means. However, the method has the advantages of low detection efficiency, long time consumption, poor economic benefit, difficulty in carrying out full-line continuous positioning on pipelines, low positioning precision and easiness in damaging underground pipelines during drilling.
In the prior art, geological radar is adopted to detect the position of an underground pipeline; the high-frequency short pulse electromagnetic wave is directionally transmitted by the transmitting antenna and propagates underground, and the reflected signal or the transmitted signal of the underground pipeline is detected to detect the pipeline target. The geological radar method has higher detection precision on the metal pipeline. However, on one hand, electromagnetic signals emitted by the geological radar are easily interfered by underground ferromagnetic buildings, and on the other hand, with the large-scale use of the underground pipelines made of nonmetallic materials such as PE pipes, PCCP pipes and the like, the detection precision of the geological radar method on the underground pipelines is greatly reduced. In addition, the geological radar method can measure the limited burial depth of the pipeline, the detection depth is smaller than 3m for the overburden area with the resistivity smaller than 100 Ω & m, and the smaller the pipe diameter of the nonmetallic pipeline is, the weaker the geological radar can detect the pipeline.
However, these methods are affected by electromagnetic interference, burial depth, pipeline materials, pipeline dimensions, etc., and have certain limitations for detecting different types of pipelines in complex environments. If the drilling detection method has the problems of low detection efficiency and poor economic benefit, the pipeline to be detected can be accidentally injured; the electromagnetic induction method has poor anti-interference capability, can only detect metal pipe fittings, and does not play a role on nonmetallic pipelines such as electric drag pipes and the like; although the geological radar method can detect part of nonmetallic pipelines, the detection of the depth of burial is not capable of detecting pipelines carrying liquid such as drain pipes; the inertial gyroscope method has certain requirements on the pipeline size, is not suitable for small-size pipelines, and has the disadvantages of complex process of traversing the pipeline by the gyroscope, large data volume and complex software operation. Therefore, the above means are difficult to fully meet the accurate positioning needs of various pipelines in the underground environment of the complicated city. How to effectively solve the problems of difficult positioning, poor positioning precision and strong limitation of urban underground pipelines, avoid the problems of damage and destruction of the underground pipelines caused by engineering construction and the like, and further reduce the probability of safety accidents.
Disclosure of Invention
In order to solve the problems of difficult positioning, poor positioning precision and strong limitation of the urban underground pipeline in the prior art, the invention provides optical fiber laying equipment, which comprises the following components: the optical fiber storage box, the optical fiber positioning box and the optical fiber sensor; one end of the optical fiber sensor is fixed in the optical fiber storage box, and the other end of the optical fiber sensor is fixed on the optical fiber positioning box;
the optical fiber laying device has two working states:
when the optical fiber storage box is used for measurement, the optical fiber storage box and the optical fiber positioning box are respectively positioned at the starting point and the end point of the underground pipeline to be measured; the optical fiber sensor is used for receiving excitation signals emitted by excitation sources which are pre-arranged in the underground pipeline to be detected;
when the optical fiber sensor is retracted, the optical fiber sensor is arranged in the optical fiber storage box, and the optical fiber storage box is connected with the optical fiber positioning box.
Preferably, the optical fiber storage box includes: a box body fiber roll shaft and electric motor; the optical fiber roll shaft and the electric motor are arranged in the box body;
one end of the optical fiber sensor is connected with the optical fiber roll shaft and is wound on the optical fiber roll shaft; the other end of the optical fiber sensor is connected with the optical fiber positioning box.
Preferably, the optical fiber storage box and the optical fiber positioning box comprise optical fiber retainers inside; the optical fiber fixer is of a sliding structure, and slides downwards when the optical fiber fixer is used for measurement, and is fixed when the optical fiber fixer is retracted; the optical fiber holder includes: positioning saw teeth, optical fiber perforation, a main fixer ruler, positioning buckles and a positioning switch;
the lower part of the main rule of the fixer is provided with a tip structure and is provided with an optical fiber perforation, and the optical fiber sensor passes through the optical fiber perforation;
positioning saw teeth and positioning buckles are arranged on two sides above the main ruler of the fixer, and the positioning saw teeth and the positioning buckles are clamped together;
a positioning switch is arranged above the main rule of the fixer, and when the positioning switch is in a pressed state, the positioning buckle and the positioning saw teeth slide to enable the main rule of the fixer to move up and down; when the positioning switch is in a non-pressed state, the positioning buckle is clamped with the positioning saw tooth so as to fix the main rule of the fixer.
Preferably, the optical fiber positioning box comprises a box body; the optical fiber storage box and the optical fiber positioning box all comprise: the telescopic moving wheel, the fixer, the buckle fixing lock, the buckle male port end and the buckle female port end;
The telescopic moving wheels are arranged at the bottoms of the optical fiber storage box and the optical fiber positioning box;
the fixer is arranged at the outer sides of the bottoms of the optical fiber storage box and the optical fiber positioning box;
the buckle fixing lock is arranged on the outer sides of the bottoms of the optical fiber storage box and the optical fiber positioning box;
the male end of the buckle is arranged outside the optical fiber storage box and the box body of the optical fiber positioning box;
the female mouthful end of buckle set up in the optic fibre storage box with the box outside of optic fibre positioning box, when packing up female mouthful end of buckle with the male mouthful end of buckle links together.
Preferably, the optical fiber laying apparatus includes 1 or more sets; when the optical fiber storage boxes are arranged in multiple sets, the optical fiber storage boxes are sequentially arranged at the starting points of the underground pipelines to be tested, and the optical fiber positioning boxes are sequentially arranged at the ending points of the underground pipelines to be tested.
Preferably, when the optical fiber storage box is a plurality of sets, the box bodies of the optical fiber storage box and the optical fiber positioning box are respectively provided with a scale rope roller shaft and a scale rope;
one end of a scale rope of the optical fiber storage box is connected with a scale rope roll shaft and is wound on the scale rope roll shaft; the other end of the scale rope of the optical fiber storage box is connected with the adjacent optical fiber storage box;
One end of a scale rope of the optical fiber positioning box is connected with a scale rope roll shaft and is wound on the scale rope roll shaft; the other end of the scale rope of the optical fiber positioning box is connected with the adjacent optical fiber positioning box.
Preferably, the arrangement of the excitation source includes: positioning mode and layout scheme;
the positioning mode is determined based on the type of the underground pipeline to be detected;
the layout scheme is determined based on the detection requirements of the underground pipeline to be detected.
Preferably, the positioning method includes: selecting a mode that a vibration device with fixed frequency passes through an underground pipeline to be detected for positioning and a mode that a water flow is cut off for positioning by a shock excitation signal;
the mode of positioning the vibrating device with fixed frequency of the selector through the underground pipeline to be detected is determined based on whether the underground pipeline to be detected is a pipeline which can be penetrated by the excitation source or a standby pipeline which can be penetrated by the excitation source or is determined based on whether the underground pipeline to be detected is a water supply and drainage pipeline;
the mode of generating excitation signals by cutting off water flow to position is determined for the water supply and drainage pipelines based on the underground pipeline to be detected.
Preferably, the layout scheme includes: full-point layout scheme, single-point layout scheme, and skip layout scheme;
The full-point layout scheme is determined based on excitation sources when the underground pipeline to be tested needs global positioning;
the single-point layout scheme is determined based on an excitation source when the underground pipeline to be tested needs to be positioned; the positioning includes any one of the following: global positioning, partial area positioning and positioning of a plurality of discontinuous underground pipelines to be tested;
the jump type layout scheme is determined based on an excitation source when a part of the area of the underground pipeline to be detected needs to be positioned or based on the excitation sources when a plurality of discontinuous underground pipelines to be detected can be detected by the same optical fiber sensor;
the excitation source is connected with the console based on an electric wire.
Preferably, the full-point layout scheme is determined based on excitation sources which are arranged on the traction rope at equal intervals according to a set distance in the underground pipeline to be tested.
Preferably, the single-point layout scheme is determined based on each excitation source which is arranged on the traction rope in a segmented mode according to a set distance in the underground pipeline to be tested.
Preferably, the jump type layout scheme is determined based on a single-point excitation source fixed on the haulage rope in the underground pipeline to be tested.
In still another aspect, the present invention further provides a method for positioning an underground pipeline, including:
optical fiber sensors arranged on two sides of an underground pipeline to be tested detect excitation signals emitted by each excitation source which is arranged in advance by using a distributed optical fiber acoustic wave sensing technology, so that the relative positions of the excitation sources are determined;
Calculating based on the relative positions of the excitation sources and a spatial position calculation method to obtain the spatial coordinates of the excitation sources;
determining the position of the underground pipeline to be tested based on the connection line of the space coordinates of each excitation source;
wherein the optical fiber sensor is arranged by adopting the optical fiber arrangement equipment described in any one of the above.
Preferably, the optical fiber sensors arranged at two sides of the underground pipeline to be tested detect excitation signals emitted by each excitation source arranged in advance by using a distributed optical fiber acoustic wave sensing technology, so as to determine the relative position of each excitation source, and the method comprises the following steps:
the method comprises the steps that excitation signals emitted by all excitation sources and received by an optical fiber sensor are positioned to two points of the optical fiber sensor which are closest to all the excitation sources and are positioned on the same section, and the distance from the excitation sources to the two points is determined;
and determining the relative position of the excitation source based on two points of the optical fiber sensor which is positioned on the same section as the excitation source and the distance from the excitation source to the two points.
Preferably, the calculating based on the relative position of each excitation source and the spatial position calculating method to obtain the spatial coordinates of each excitation source includes:
obtaining coordinate values of a Y axis based on a predetermined space coordinate axis and the relative position of the excitation source;
Calculating the burial depth of the excitation source based on the burial depth relation of the excitation source to obtain a coordinate value of a Z axis;
calculating to obtain a coordinate value of which the distance from the vibration source to the nearest point in the two optical fiber sensor points in the X-axis direction is the X-axis based on the burial depth relation of the vibration source;
obtaining the space coordinates of the excitation source based on the coordinate values of the X axis, the coordinate values of the Y axis and the coordinate values of the Z axis;
the predetermined space coordinate axis takes the layout direction of the optical fiber sensor as the Y-axis direction in the space coordinate axis, the direction perpendicular to the layout direction of the optical fiber sensor as the X-axis direction, and the Z-axis direction is determined according to the right-hand screw rule.
Preferably, the burial depth relation is as follows:
in the method, in the process of the invention,is the burial depth of the excitation source +.>The distance between the excitation source and the No. 2 optical fiber in the X direction; d is the optical fiber spacing; />Is the distance between the excitation source and the No. 1 optical fiber; />Is the distance between the excitation source and the No. 2 optical fiber.
In yet another aspect, the present invention also provides an underground pipe positioning system, including:
the excitation source position determining module is used for detecting excitation signals emitted by each excitation source which is arranged in advance by using a distributed optical fiber acoustic wave sensing technology through optical fiber sensors arranged on two sides of the underground pipeline to be detected, so as to determine the relative position of each excitation source;
The excitation source coordinate determining module is used for calculating based on the relative positions of the excitation sources and a spatial position calculating method to obtain the spatial coordinates of the excitation sources;
the underground pipeline position determining module is used for determining the position of the underground pipeline to be detected based on the connection line of the space coordinates of each excitation source;
wherein the optical fiber sensor is arranged by adopting the optical fiber arrangement equipment described in any one of the above.
In yet another aspect, the present invention also provides a computer device, including:
one or more processors;
a processor for executing one or more programs;
the one or more programs, when executed by the one or more processors, implement a method of locating a subterranean pipe as described above.
In yet another aspect, the present invention provides a computer readable storage medium having a computer program stored thereon, the computer program when executed implementing a method for locating an underground pipe as described above.
Compared with the prior art, the invention has the beneficial effects that:
an optical fiber laying device, an underground pipeline positioning method and system, comprising: the optical fiber storage box, the optical fiber positioning box and the optical fiber sensor; one end of the optical fiber sensor is fixed in the optical fiber storage box, and the other end of the optical fiber sensor is fixed on the optical fiber positioning box; the optical fiber laying device has two working states: when the optical fiber storage box is used for measurement, the optical fiber storage box and the optical fiber positioning box are respectively positioned at the starting point and the end point of the underground pipeline to be measured; the optical fiber sensor is used for receiving excitation signals emitted by excitation sources which are pre-arranged in the underground pipeline to be detected; when the optical fiber storage box is retracted, the optical fiber sensor is arranged in the optical fiber storage box, and the optical fiber storage box is connected with the optical fiber positioning box; the optical fiber sensor in the optical fiber layout equipment can detect excitation signals in underground pipelines with different sizes, different types and different detection requirements, and the limitation of the existing positioning method is effectively solved by combining the distributed optical fiber acoustic wave sensing technology for positioning, and the positioning precision is also improved; the optical fiber sensor is pulled out for layout through the optical fiber layout equipment, so that the optical fiber layout time is greatly shortened, and the working efficiency is further improved;
The invention can also effectively avoid the problem of damage and destruction of the underground pipeline caused by construction, thereby reducing the probability of occurrence of safety accidents.
Drawings
FIG. 1 is a block diagram of an optical fiber routing device according to the present invention;
FIG. 2 is a detailed view of a graduated fiber optic sensor of the present invention;
FIG. 3 is a detailed top view of the fiber optic storage box of the present invention;
FIG. 4 is a detailed left side view of the fiber optic storage box of the present invention;
FIG. 5 is a detail view of the fiber optic holder of the present invention;
FIG. 6 is a top view of the fiber optic positioning box of the present invention;
FIG. 7 is a left side view of the fiber optic positioning box of the present invention;
FIG. 8 is a detailed view of a scale cord of the present invention;
FIG. 9 is a top plan view of the fiber routing apparatus of the present invention in a daily state;
FIG. 10 is a top view of the fiber routing apparatus of the present invention in an operational state;
FIG. 11 is a schematic diagram of a full-dot layout scheme of the present invention;
FIG. 12 is a schematic illustration of the detection of a partial region of the same underground conduit in accordance with the present invention;
FIG. 13 is a schematic illustration of the detection of a plurality of discrete subterranean conduits in accordance with the present invention;
FIG. 14 is a schematic diagram of an optical fiber arrangement of the present invention;
FIG. 15 is a schematic diagram of simultaneous emission signals from excitation sources according to the present invention;
FIG. 16 is a schematic diagram of a excitation source hopping emission signal according to the present invention;
FIG. 17 is a schematic cross-sectional view of a determination of an excitation source based on DAS techniques in accordance with the present invention;
FIG. 18 is a schematic view of a monitoring cross section of the present invention;
FIG. 19 is a schematic illustration of the position determination of an underground utility of the present invention;
FIG. 20 is a schematic workflow diagram of the present invention;
the device comprises a 1-optical fiber storage box, a 2-optical fiber positioning box, a 3-optical fiber storage box, a 4-optical fiber positioning box, a 5-optical fiber sensor, a 6-scale rope, a 7-interrogator, an 8-end cap, a 101-scale rope roll shaft, a 102-telescopic moving wheel, a 103-fixer, a 104-buckle fixed lock, a 105-buckle male end, a 106-optical fiber fixer, a 107-optical fiber roll shaft, a 108-electric motor, a 109-box body, a 1010-buckle female end, a 201-telescopic moving wheel, a 202-buckle female end, a 203-optical fiber fixer, a 204-buckle male end, a 205-scale rope roll shaft, a 206-buckle fixed lock, a 207-fixer, a 208-box body, 2031-positioning saw teeth, a 2032-optical fiber perforation, a 2033-fixer main scale, a 2034-positioning buckle and a 2035-positioning switch.
Detailed Description
The distributed optical fiber acoustic wave sensing technology has the characteristics of strong electromagnetic interference resistance, long-distance dynamic monitoring, high sensitivity, high reliability and the like, and the whole optical fiber in the system can be used as a sensing element to detect signals such as acoustic waves, vibration and the like, so that the distributed optical fiber acoustic wave sensing technology is applied to the fields such as perimeter security and intrusion detection, underground pipeline leakage detection and the like, and good practical effects are obtained; in order to solve the problem of accurate positioning of different types of underground pipelines such as power, communication, water supply and drainage and the like in a complex environment, the invention provides an underground pipeline detection positioning method which is not limited by pipeline materials, types, sizes, burial depths and the like and has the characteristics of high efficiency, accuracy and simplicity and convenience, and develops matched equipment by utilizing the characteristics of high information abundance, strong electromagnetic interference resistance, long-distance dynamic monitoring and accurate sensing of the relative positions of adjacent signals; the distributed optical fibers and the excitation sources are respectively distributed on the ground around the existing pipeline and in the pipeline to be detected, during detection, the excitation sources generate excitation signals, the relative positions of the excitation sources are perceived and determined through the distributed optical fibers, and the spatial coordinates of the excitation sources in the underground pipeline are calculated by further combining a spatial position calculation method, so that the effect of accurately positioning the underground pipeline is achieved. For a better understanding of the present invention, reference is made to the following description, drawings and examples.
Example 1:
an optical fiber routing apparatus, as shown in fig. 1, comprising: an optical fiber storage box 1, an optical fiber positioning box 2 and an optical fiber sensor 5; one end of the optical fiber sensor 5 is fixed in the optical fiber storage box 1, and the other end of the optical fiber sensor is fixed on the optical fiber positioning box 2;
the optical fiber laying device has two working states:
when the optical fiber storage box is used for measurement, the optical fiber storage box 1 and the optical fiber positioning box 2 are respectively positioned at the starting point and the end point of the underground pipeline to be measured; the optical fiber sensor 5 is used for receiving excitation signals emitted by excitation sources which are arranged in advance in the underground pipeline to be detected;
when the optical fiber storage box is retracted, the optical fiber sensor 5 is arranged in the optical fiber storage box 1, and the optical fiber storage box 1 is connected with the optical fiber positioning box 2.
Further, the optical fiber storage box 1 and the optical fiber positioning box 2 are rectangular and made of metal or hard plastic materials. In the present embodiment, the optical fiber sensor 5 is an optical fiber sensor with graduations, as shown in fig. 2; the excitation source signal can be received and sent to the upper computer, the layout length can be determined, and the measurement accuracy is set to be 1cm in the embodiment. The optical fiber storage box 1 is mainly used for placing an optical fiber sensor 5; the optical fiber positioning box 2 is mainly used for pulling out and pulling and positioning the optical fiber sensor 5 to a target place in the field.
The optical fiber storage box 1 includes: a case 109, a fiber roller shaft 107, and an electric motor 108; the fiber roller shaft 107 and the electric motor 108 are disposed in the case 109;
further, the top view of the optical fiber storage box 1 is shown in fig. 3, and the left view is shown in fig. 4; one end of the optical fiber sensor 5 is connected with the optical fiber roller shaft 107 and is wound on the optical fiber roller shaft 107; the other end of the optical fiber sensor 5 is connected with the optical fiber positioning box. When the measurement is completed, the fiber sensor 5 can be recovered on the fiber roll shaft 107 by means of the electric motor 108.
The optical fiber storage box 1 internally comprises an optical fiber fixer 106, the optical fiber positioning box 2 internally comprises an optical fiber fixer 203, the optical fiber fixer 106 and the optical fiber fixer 203 have the same structure and are of sliding structures as shown in fig. 5, when the optical fiber storage box is used for measurement, the optical fiber fixer 106 and the optical fiber fixer 203 slide downwards, and when the optical fiber storage box is retracted, the optical fiber fixer 106 and the optical fiber fixer 203 are fixed; the optical fiber holder 106 and the optical fiber holder 203 each include: positioning saw teeth 2031, optical fiber perforation 2032, a main fixer ruler 2033, positioning buckles 2034 and a positioning switch 2035;
further, when the device is used for measurement, the positioning switch 2035 of the optical fiber holder 106 in the optical fiber storage box 1 is pressed down, the optical fiber holder 203 is pushed down to enable the positioning buckle 2034 to slide with the positioning saw tooth 2031, the tip of the holder main scale 2033 is inserted into the soil body, and at the moment, one end of the optical fiber sensor 5 penetrating through the optical fiber perforation 2032 is stuck to the ground. Similarly, the tip of the optical fiber holder 203 on the optical fiber positioning box 2 is inserted into the soil body, so that the optical fiber ends are all stuck to the ground. For the condition that the underground pipeline area to be measured is longer and the ground is uneven, the ground of a certain section in the middle of the optical fiber is possibly not tightly attached, and the field is leveled as much as possible or a heavy object is covered on the field to enable the optical fiber to be laid as much as possible.
The optical fiber storage box 1 includes: a retractable travel wheel 102, a retainer 103, a snap-fit lock 104, a snap-fit male end 105, and a snap-fit female end 1010; the optical fiber positioning box 2 includes: a telescopic moving wheel 201, a buckle fixing lock 206, a buckle male end 204, a buckle female end 202, a fixer 207 and a box 208;
wherein, the telescopic moving wheel 102 has the same structure as the telescopic moving wheel 201, the fixer 103 has the same structure as the fixer 207, the buckle fixing lock 104 has the same structure as the buckle fixing lock 206, the buckle male end 105 has the same structure as the buckle male end 204, and the buckle female end 1010 has the same structure as the buckle female end 202. The top view of the fiber positioning case 2 is shown in fig. 6, and the right view is shown in fig. 7.
Further, the snap-in lock 104 on the optical fiber storage box 1 and the snap-in lock 206 on the optical fiber positioning box 2 are opened during measurement, so that the optical fiber storage box 1 and the optical fiber positioning box 2 can freely move. The optical fiber storage box 1 is fixed at a preset starting point of one of the optical fibers by a holder 103. The retractable moving wheel 201 on the optical fiber positioning box 2 is opened, so that the optical fiber positioning box 2 can move on the ground. By moving the position of the optical fiber positioning box 2, the optical fiber sensor 5 is pulled out. When the read length of the optical fiber sensor 5 reaches a preset length, the retractable moving wheel 201 is retracted, and the position of the component optical fiber positioning box 2 is fixed by the holder 207.
After the measurement is completed, the rivets on the retainers 103 and 207 are pulled out, the optical fiber retainers 106 and 203 are pulled out and pushed back to the initial positions, the optical fiber sensor 5 is recovered to the optical fiber roller shaft 107 by means of the electric motor 108, the optical fiber storage box 1 and the optical fiber positioning box 2 are combined together by means of the male buckle end 105, the female buckle end 1010, the male buckle end 204 and the female buckle end 202, and the buckle fixing lock 104 and the buckle fixing lock 206 are closed.
The optical fiber laying equipment comprises 1 set or a plurality of sets; when the number of the optical fiber storage boxes is multiple, the optical fiber storage boxes 1 in the multiple sets are sequentially arranged at the starting point of the underground pipeline to be tested, and the optical fiber positioning boxes 2 in the multiple sets are sequentially arranged at the ending point of the underground pipeline to be tested;
when the number of the optical fiber storage boxes is multiple, the box bodies 109 and 208 of the optical fiber storage boxes 1 and the optical fiber positioning boxes 2 are respectively provided with a scale rope roller shaft 101 and a scale rope 6;
one end of a scale rope 6 of the optical fiber storage box 1 is connected with a scale rope roll shaft 101 and is wound on the scale rope roll shaft 101; the other end of the scale rope 6 of the optical fiber storage box 1 is connected with the adjacent optical fiber storage box 3;
one end of the scale rope 6 of the optical fiber positioning box 2 is connected with a scale rope roller shaft 205 and is wound on the scale rope roller shaft 205; the other end of the scale rope 6 of the optical fiber positioning box 2 is connected with the adjacent optical fiber positioning box 4.
The scale rope is mainly used for determining the distance between the optical fiber sensors, and the distance between the two optical fiber storage boxes and the distance between the two optical fiber positioning boxes are adjusted through the scale rope 6, so that the measurement accuracy is set to be 1cm in the embodiment, as shown in fig. 8.
Further, when the optical fiber laying device is provided with two sets, the daily state is shown in fig. 9, and the working state is shown in fig. 10. The optical fiber storage box comprises an optical fiber storage box 1, an optical fiber positioning box 2, an optical fiber storage box 3, an optical fiber positioning box 4, two optical fiber sensors 5 and two scale ropes 6.
According to the scene requirement, a plurality of optical fiber sensors can be adopted to simultaneously position a plurality of underground pipelines; or two optical fiber sensors are arranged outside a plurality of underground pipelines, and excitation sources in each underground pipeline are selected from excitation sources with different frequencies. The optical fibers can be arranged along the same side of the pipeline or perpendicular to the pipeline according to the environment of the region where the pipeline section to be detected is located, the detection length and the like.
The arrangement of the excitation source comprises the following steps: positioning mode and layout scheme;
the positioning mode is determined based on the type of the underground pipeline to be detected;
the layout scheme is determined based on the detection requirements of the underground pipeline to be detected.
The positioning mode comprises the following steps: selecting a mode that a vibrating device with small volume and fixed frequency passes through an underground pipeline to be detected for positioning and a mode that a water flow is cut off for positioning a shock excitation signal;
The mode of positioning the vibration device with small volume and fixed frequency through the underground pipeline to be detected is determined based on whether the underground pipeline to be detected is a pipeline which can be penetrated by an excitation source or a standby pipeline which can be penetrated by the excitation source, such as an electric drawing pipe, a calandria pipe and the like, or is determined based on the underground pipeline to be detected as a water supply and drainage pipeline;
the excitation source may be a high-frequency acoustic wave emitter, for example, which may freely pass through the standby pipe or the pipeline itself.
The mode of generating excitation signals by cutting off water flow to position is determined for the water supply and drainage pipelines based on the underground pipeline to be detected.
The layout scheme comprises the following steps: full-point layout scheme, single-point layout scheme, and skip layout scheme; the full-point layout scheme is suitable for positioning the whole area of the underground pipeline. Referring to the length of the underground pipe, as shown in fig. 11, the pulling rope of the threader can be set to be 0.5-2m at regular intervals, and an excitation source is arranged and numbered sequentially. The distance between the excitation sources can be adjusted according to actual requirements, and the higher the positioning accuracy requirement is, the denser the excitation sources are arranged.
The jump type layout scheme is suitable for underground pipelines which need to be positioned only in partial areas of long distances as shown in fig. 12 or detection of a plurality of discontinuous underground pipelines which can adopt the same optical fiber as shown in fig. 13, and the excitation source is arranged on the traction rope of the threading apparatus in a segmented mode. The distance between the excitation sources is consistent with the scheme, and the number of the excitation sources is determined according to the length of the underground pipeline to be positioned.
The single-point layout scheme is determined based on an excitation source when the underground pipeline to be tested needs to be positioned; the positioning includes any one of the following: global positioning, partial area positioning and positioning of a plurality of discontinuous underground pipelines to be tested.
Furthermore, the single-point arrangement scheme is carried out in a mode that a single-point excitation source moves in a pipeline and emits excitation signals once at certain intervals. The transmission interval of the excitation signals can be adjusted according to the detection precision, and the transmission interval of adjacent excitation signals is not required to be the same.
The excitation source is connected with the console based on an electric wire.
Example 2:
a method of locating an underground pipe, comprising:
step 1, detecting excitation signals emitted by each excitation source which is arranged in advance by using optical fiber sensors arranged on two sides of an underground pipeline to be detected by using a distributed optical fiber acoustic wave sensing technology, and further determining the relative positions of the excitation sources;
step 2, calculating based on the relative positions of the excitation sources and a spatial position calculation method to obtain the spatial coordinates of the excitation sources;
step 3, determining the position of the underground pipeline to be tested based on the connection line of the space coordinates of each excitation source;
wherein the optical fiber sensor is arranged by adopting the optical fiber arranging equipment according to any one of the embodiment 1.
The method also comprises the step of arranging the optical fiber sensor before the step 1, and comprises the following specific contents:
according to different positioning requirements of the underground pipeline, firstly determining the type and the positioning area of the underground pipeline, and further determining the trend of the pipeline to be tested. Two optical fiber sensors are arranged in parallel along the general trend of the pipeline to be tested, as shown in fig. 14. The starting point and the ending point of the optical fiber layout and the sites along the optical fiber layout should be as smooth as possible, and the starting point and the ending point of the optical fiber are ensured to be firmly fixed, so that the optical fiber layout and the signal monitoring are facilitated. In the figure, the optical fiber sensors 5 are required to be arranged on a ground, and the two optical fiber sensors are respectively arranged at the positions of the two sides of the starting point and the end point of the pipeline to be detected. The distance d between the optical fibers is preferably 0.5-5m, and can be adjusted according to specific requirements of the site, one end of the optical fibers is provided with an end cap 8, and the other end of the optical fibers is connected with an interrogator 7. For crossing road section areas, measures such as external sleeves, covered boards and the like are adopted to properly protect the optical fibers, so that damage to the optical fiber sensors caused by rolling of vehicles is avoided. To ensure that the whole area of the underground pipeline can be positioned, the two ends of the optical fiber are preferably 2-5m beyond the starting point and the end point of the underground pipeline to be detected.
In step 1, optical fiber sensors arranged on two sides of an underground pipeline to be tested detect excitation signals emitted by each excitation source which is arranged in advance by using a distributed optical fiber acoustic wave sensing technology, so as to determine the relative positions of each excitation source, and the method specifically comprises the following steps:
If the pipeline itself can be penetrated by the excitation source or a standby pipe is provided, the signal detection process is as follows:
for the full-point layout scheme, after the optical fiber layout is completed, a threading device haulage rope bound with an excitation source is threaded from one end of an underground pipeline to the other end, and is fixed by a fixer. The console is connected with the excitation source through wires to control the emission of excitation signals. The multiple excitation sources can synchronously excite signals as shown in fig. 15, skip emission signals as shown in fig. 16 or sequentially emit signals according to the serial numbers of the excitation sources, and the like, and the excitation sources can be selected according to specific requirements during actual measurement. The emission duration of the excitation signal can be adjusted according to the intensity, stability, definition and the like of the sensing signal of the optical fiber sensor.
The working flow of the excitation source of the jump type layout scheme is consistent with that of the full-point layout scheme.
For a single-point layout scheme, the excitation source is enabled to advance in the pipeline, the excitation signal is emitted uninterruptedly, the advancing speed can be set to be 1m/min, and the specific speed can be adjusted according to the intensity, stability, definition and the like of the sensing signal of the optical fiber sensor.
If the detected underground pipeline belongs to a water supply and drainage pipeline, according to different forms of the generated excitation signals, the signal detection process is as follows:
For the case of detected underground pipes with access openings, the excitation source can be tied above the foam and put into the pipe. The excitation source flows along with the flow of liquid such as water flow and the like from the inlet to the outlet, and continuously generates excitation signals, the optical fiber sensor senses the relative positions of the excitation signals and records the relative positions, if the complete pipeline position information cannot be obtained once, the excitation source can be circularly thrown in for many times;
for the condition that the detected underground pipeline cannot find the inlet and the outlet, a mode of intercepting water flow in the pipeline can be adopted, excitation signals are generated by using water head passing, and the optical fiber sensor senses the signal direction and records. If the excitation signal generated by one-time water cutting can not meet the positioning requirement, repeatedly collecting the signal in a mode of cutting water for multiple times until the optical fiber sensor can clearly sense the excitation signal;
the excitation signals detected along the optical fiber are identified and classified by a data processing and analyzing device in the distributed optical fiber acoustic wave sensing DAS technology, so that the relative position of the excitation signals to the optical fiber sensor is determined.
A high power stationary laser light source in a distributed fiber acoustic wave sensing DAS interrogator unit emits a laser pulse into the sensing fiber that, as it passes along the sensing fiber, produces backward rayleigh scattering at each point of the fiber scatterer in the fiber and is received and analyzed by the interrogator unit.
Then, when disturbance such as vibration, acoustics, deformation or temperature change occurs at a certain point near the sensing optical fiber outside, the intensity and the frequency spectrum of the backward Rayleigh scattering signal at the corresponding position change, namely, the external signal modulates the backward Rayleigh scattering, and the change of the intensity and the frequency spectrum can be accepted and analyzed by the interrogator unit to obtain the characteristics of the external disturbance event.
And then, the accurate time service module in the interrogator unit compares the time difference between the sent laser pulse and the disturbed backward Rayleigh scattering, and inverts the position of the disturbed point in the sensing optical fiber, thereby realizing the positioning of external disturbance.
In step 2, calculating based on the relative position of each excitation source and a spatial position calculation method to obtain the spatial coordinates of each excitation source, which specifically includes:
based on the relative position of the excitation signal, the space coordinate of the excitation source is further calculated, and the specific calculation process is as follows:
and determining a space coordinate axis. The optical fiber laying direction is taken as the y direction, the direction perpendicular to the optical fiber laying direction is taken as the x direction, and the z direction is determined by the right-hand screw rule, as shown in fig. 17.
And determining the relative position of the excitation source. Taking a general case as an example, when an excitation signal is generated at a certain point, two optical fiber sensors on the earth surface can detect the signal azimuth. At this time, the distributed optical fiber acoustic wave sensing DAS technology is positioned to the two optical fiber points which are positioned at the same section with the excitation source and the distance between the two optical fiber points and the excitation source And->As shown in fig. 18. Wherein, the monitoring section is perpendicular to the optical fiber arrangement direction, namely the y direction. That is, the y-axis coordinates of the excitation source can be directly determined by the distributed fiber acoustic sensing DAS technique.
And calculating the space coordinates of the excitation source. Further determining the burial depth of the excitation sourceAnd distance delta between the excitation source and the No. 2 optical fiber in the x directiondThe x-axis and z-axis coordinates of the point can be accurately determined. Due to the perpendicular distance of the excitation source from the optical fiber +.>Andis known to beAnd the relative distance of the fibers is determined. The following relationship is further obtained:
in the method, in the process of the invention,is the burial depth of the excitation source +.>The distance between the excitation source and the No. 2 optical fiber in the X direction; d is the optical fiber spacing; />Is the distance between the excitation source and the No. 1 optical fiber; />Is the distance between the excitation source and the No. 2 optical fiber.
Further simplifying and obtaining:
in the method, in the process of the invention,the distance between the excitation source and the No. 2 optical fiber in the X direction; />Is the distance between the excitation source and the No. 1 optical fiber;is the distance between the excitation source and the No. 2 optical fiber; d is the optical fiber spacing; />Is the burial depth of the excitation source.
In the process of obtaining the burial depth of the excitation sourceAnd distance of the excitation source from fiber No. 2 in the X direction +.>After the values of the excitation source points are combined with the positions of the optical fibers, the spatial coordinates of the excitation source points positioned inside the pipeline can be determined.
In step 3, determining the position of the underground pipeline to be measured based on the connection line of the space coordinates of the excitation sources specifically includes:
after the locations of all the excitation sources within the underground pipe are determined, the specific locations of the underground pipe can be further determined by lining up the points, as shown in fig. 19.
Based on the above description, the specific working flow of the present invention is shown in fig. 20, and the main steps include optical fiber arrangement, excitation source arrangement, signal detection and position determination.
The invention improves the precision of the investigation of the underground pipeline in the early stage of engineering, reduces the construction risk, not only protects the existing underground pipeline from construction damage, but also effectively avoids accidents such as power failure and the like caused by the rupture and damage of the underground pipeline, and has good practical value and achievement transformation prospect; the method has the capability of efficiently and accurately detecting the underground pipelines of different types such as electric power, communication, water supply and drainage and the like, can effectively solve the problems of damage and destruction to the underground pipelines caused by construction due to insufficient detection precision or insufficient detection capability in the prior art, reduces construction safety risks, protects the existing pipelines, has higher economic benefit and practical value, can convert achievements after the related technology is mature, and provides technical support for safe operation of an electric power system.
Example 3:
an underground pipe positioning system, comprising:
the excitation source position determining module is used for detecting excitation signals emitted by each excitation source which is arranged in advance by using a distributed optical fiber acoustic wave sensing technology through optical fiber sensors arranged on two sides of the underground pipeline to be detected, so as to determine the relative position of each excitation source;
the excitation source coordinate determining module is used for calculating based on the relative positions of the excitation sources and a spatial position calculating method to obtain the spatial coordinates of the excitation sources;
the underground pipeline position determining module is used for determining the position of the underground pipeline to be detected based on the connection line of the space coordinates of each excitation source;
wherein the optical fiber sensor is arranged by adopting the optical fiber arranging equipment according to any one of the embodiment 1.
The excitation source position determining module is specifically configured to:
the method comprises the steps that excitation signals emitted by all excitation sources and received by an optical fiber sensor are positioned to two points of the optical fiber sensor which are closest to all the excitation sources and are positioned on the same section, and the distance from the excitation sources to the two points is determined;
and determining the relative position of the excitation source based on two points of the optical fiber sensor which is positioned on the same section as the excitation source and the distance from the excitation source to the two points.
The excitation source coordinate determining module is specifically configured to:
obtaining coordinate values of a Y axis based on a predetermined space coordinate axis and the relative position of the excitation source;
calculating the burial depth of the excitation source based on the burial depth relation of the excitation source to obtain a coordinate value of a Z axis;
calculating to obtain a coordinate value of which the distance from the vibration source to the nearest point in the two optical fiber sensor points in the X-axis direction is the X-axis based on the burial depth relation of the vibration source;
obtaining the space coordinates of the excitation source based on the coordinate values of the X axis, the coordinate values of the Y axis and the coordinate values of the Z axis;
the predetermined space coordinate axis takes the layout direction of the optical fiber sensor as the Y-axis direction in the space coordinate axis, the direction perpendicular to the layout direction of the optical fiber sensor as the X-axis direction, and the Z-axis direction is determined according to the right-hand screw rule.
The relation of the burial depth in the excitation source coordinate determining module is as follows:
/>
in the method, in the process of the invention,is the burial depth of the excitation source +.>The distance between the excitation source and the No. 2 optical fiber in the X direction; d is the optical fiber spacing; />Is the distance between the excitation source and the No. 1 optical fiber; />Is the distance between the excitation source and the No. 2 optical fiber.
Example 4:
in a further embodiment of the present invention, a computer device is provided, which includes a processor and a memory, where the memory is configured to store a computer program, the computer program includes program instructions, and the processor is configured to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (ApplicationSpecific Integrated Circuit, ASIC), off-the-shelf Programmable gate arrays (FPGAs) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which are the computational core and control core of the terminal adapted to implement one or more instructions, in particular adapted to load and execute one or more instructions within a computer storage medium to implement the corresponding method flow or corresponding functions; the processor of the embodiments of the present invention may be used to perform the steps of a method for locating an underground pipe.
Example 5:
in still another embodiment of the present invention, based on the same inventive concept, the present invention further provides a storage medium, in particular, a computer readable storage medium (Memory), which is a Memory device in a computer device, for storing programs and data. It is understood that the computer readable storage medium herein may include both built-in storage media in a computer device and extended storage media supported by the computer device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), adapted to be loaded and executed by the processor. The computer readable storage medium herein may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. One or more instructions stored in a computer-readable storage medium may be loaded and executed by a processor to implement the corresponding steps of a method for locating an underground pipe in the above-described embodiments.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather as providing for the use of additional embodiments within the spirit and scope of the present invention.
Claims (18)
1. An optical fiber laying apparatus, comprising: the optical fiber storage box, the optical fiber positioning box and the optical fiber sensor; one end of the optical fiber sensor is fixed in the optical fiber storage box, and the other end of the optical fiber sensor is fixed on the optical fiber positioning box;
The optical fiber laying device has two working states:
when the optical fiber storage box is used for measurement, the optical fiber storage box and the optical fiber positioning box are respectively positioned at the starting point and the end point of the underground pipeline to be measured; the optical fiber sensor is used for receiving excitation signals emitted by excitation sources which are pre-arranged in the underground pipeline to be detected;
when the optical fiber storage box is retracted, the optical fiber sensor is arranged in the optical fiber storage box, and the optical fiber storage box is connected with the optical fiber positioning box;
the optical fiber storage box and the optical fiber positioning box comprise optical fiber fixtures; the optical fiber fixer is of a sliding structure, and slides downwards when the optical fiber fixer is used for measurement, and is fixed when the optical fiber fixer is retracted; the optical fiber holder includes: positioning saw teeth, optical fiber perforation, a main fixer ruler, positioning buckles and a positioning switch;
the lower part of the main rule of the fixer is provided with a tip structure and is provided with an optical fiber perforation, and the optical fiber sensor passes through the optical fiber perforation;
positioning saw teeth and positioning buckles are arranged on two sides above the main ruler of the fixer, and the positioning saw teeth and the positioning buckles are clamped together;
a positioning switch is arranged above the main rule of the fixer, and when the positioning switch is in a pressed state, the positioning buckle and the positioning saw teeth slide to enable the main rule of the fixer to move up and down; when the positioning switch is in a non-pressed state, the positioning buckle is clamped with the positioning saw tooth so as to fix the main rule of the fixer.
2. The fiber routing apparatus of claim 1, wherein the fiber storage box comprises: a box body fiber roll shaft and electric motor; the optical fiber roll shaft and the electric motor are arranged in the box body;
one end of the optical fiber sensor is connected with the optical fiber roll shaft and is wound on the optical fiber roll shaft; the other end of the optical fiber sensor is connected with the optical fiber positioning box.
3. The fiber routing apparatus of claim 1, wherein the fiber positioning box comprises a box body; the optical fiber storage box and the optical fiber positioning box all comprise: the telescopic moving wheel, the fixer, the buckle fixing lock, the buckle male port end and the buckle female port end;
the telescopic moving wheels are arranged at the bottoms of the optical fiber storage box and the optical fiber positioning box;
the fixer is arranged at the outer sides of the bottoms of the optical fiber storage box and the optical fiber positioning box;
the buckle fixing lock is arranged on the outer sides of the bottoms of the optical fiber storage box and the optical fiber positioning box;
the male end of the buckle is arranged outside the optical fiber storage box and the box body of the optical fiber positioning box;
the female mouthful end of buckle set up in the optic fibre storage box with the box outside of optic fibre positioning box, when packing up female mouthful end of buckle with the male mouthful end of buckle links together.
4. The fiber routing apparatus of claim 1, wherein the fiber routing apparatus comprises 1 or more sets; when the optical fiber storage boxes are arranged in multiple sets, the optical fiber storage boxes are sequentially arranged at the starting points of the underground pipelines to be tested, and the optical fiber positioning boxes are sequentially arranged at the ending points of the underground pipelines to be tested.
5. The optical fiber laying apparatus according to claim 1, wherein when there are a plurality of sets, scale rope roller shafts and scale ropes are provided in the cases of the optical fiber storage case and the optical fiber positioning case;
one end of a scale rope of the optical fiber storage box is connected with a scale rope roll shaft and is wound on the scale rope roll shaft; the other end of the scale rope of the optical fiber storage box is connected with the adjacent optical fiber storage box;
one end of a scale rope of the optical fiber positioning box is connected with a scale rope roll shaft and is wound on the scale rope roll shaft; the other end of the scale rope of the optical fiber positioning box is connected with the adjacent optical fiber positioning box.
6. The optical fiber arrangement apparatus according to claim 1, wherein the arrangement of the excitation source includes: positioning mode and layout scheme;
the positioning mode is determined based on the type of the underground pipeline to be detected;
The layout scheme is determined based on the detection requirements of the underground pipeline to be detected.
7. The fiber routing apparatus of claim 6, wherein the positioning means comprises: selecting a mode that a vibration device with fixed frequency passes through an underground pipeline to be detected for positioning and a mode that a water flow is cut off for positioning by a shock excitation signal;
the mode of positioning the vibration device with fixed selection frequency through the underground pipeline to be detected is determined based on whether the underground pipeline to be detected is a pipeline which can be penetrated by an excitation source or a standby pipeline which can be penetrated by the excitation source or is determined based on whether the underground pipeline to be detected is a water supply and drainage pipeline;
the mode of generating excitation signals by cutting off water flow to position is determined for the water supply and drainage pipelines based on the underground pipeline to be detected.
8. The fiber routing apparatus of claim 6, wherein the routing scheme comprises: full-point layout scheme, single-point layout scheme, and skip layout scheme;
the full-point layout scheme is determined based on excitation sources when the underground pipeline to be tested needs global positioning;
the single-point layout scheme is determined based on an excitation source when the underground pipeline to be tested needs to be positioned; the positioning includes any one of the following: global positioning, partial area positioning and positioning of a plurality of discontinuous underground pipelines to be tested;
The jump type layout scheme is determined based on an excitation source when a part of the area of the underground pipeline to be detected needs to be positioned or based on the excitation sources when a plurality of discontinuous underground pipelines to be detected can be detected by the same optical fiber sensor;
the excitation source is connected with the console based on an electric wire.
9. The fiber routing apparatus of claim 8, wherein the full-point routing scheme is determined based on excitation sources within the underground pipe under test that are equally spaced apart by a set distance on the haulage rope.
10. The optical fiber arrangement device according to claim 8, wherein the single-point arrangement scheme is determined based on excitation sources arranged on the haulage rope in segments at set distances in the underground pipeline to be measured.
11. The fiber routing apparatus of claim 8, wherein the jump routing scheme is determined based on a single point excitation source fixed to a haulage rope within the underground pipe under test.
12. A method of locating an underground pipe, comprising:
optical fiber sensors arranged on two sides of an underground pipeline to be tested detect excitation signals emitted by each excitation source which is arranged in advance by using a distributed optical fiber acoustic wave sensing technology, so that the relative positions of the excitation sources are determined;
Calculating based on the relative positions of the excitation sources and a spatial position calculation method to obtain the spatial coordinates of the excitation sources;
determining the position of the underground pipeline to be tested based on the connection line of the space coordinates of each excitation source;
wherein the optical fiber sensor is laid using an optical fiber laying apparatus as claimed in any one of claims 1 to 11.
13. The method for positioning an underground pipeline according to claim 12, wherein the detecting excitation signals emitted by each excitation source arranged in advance by the optical fiber sensors arranged at two sides of the underground pipeline to be tested by using a distributed optical fiber acoustic wave sensing technology, so as to determine the relative positions of each excitation source, comprises:
the method comprises the steps that excitation signals emitted by all excitation sources and received by an optical fiber sensor are positioned to two points of the optical fiber sensor which are closest to all the excitation sources and are positioned on the same section, and the distance from the excitation sources to the two points is determined;
and determining the relative position of the excitation source based on two points of the optical fiber sensor which is positioned on the same section as the excitation source and the distance from the excitation source to the two points.
14. The method for positioning an underground pipeline according to claim 12, wherein the calculating based on the relative positions of the excitation sources and the spatial position calculation method to obtain the spatial coordinates of the excitation sources comprises:
Obtaining coordinate values of a Y axis based on a predetermined space coordinate axis and the relative position of the excitation source;
calculating the burial depth of the excitation source based on the burial depth relation of the excitation source to obtain a coordinate value of a Z axis;
calculating to obtain a coordinate value of which the distance from the vibration source to the nearest point in the two optical fiber sensor points in the X-axis direction is the X-axis based on the burial depth relation of the vibration source;
obtaining the space coordinates of the excitation source based on the coordinate values of the X axis, the coordinate values of the Y axis and the coordinate values of the Z axis;
the predetermined space coordinate axis takes the layout direction of the optical fiber sensor as the Y-axis direction in the space coordinate axis, the direction perpendicular to the layout direction of the optical fiber sensor as the X-axis direction, and the Z-axis direction is determined according to the right-hand screw rule.
15. The method of claim 14, wherein the burial depth relationship is as follows:
in the method, in the process of the invention,is the burial depth of the excitation source +.>The distance between the excitation source and the No. 2 optical fiber in the X direction; />Is the optical fiber spacing; />Is the distance between the excitation source and the No. 1 optical fiber; />Is the distance between the excitation source and the No. 2 optical fiber.
16. An underground pipe positioning system, comprising:
The excitation source position determining module is used for detecting excitation signals emitted by each excitation source which is arranged in advance by using a distributed optical fiber acoustic wave sensing technology through optical fiber sensors arranged on two sides of the underground pipeline to be detected, so as to determine the relative position of each excitation source;
the excitation source coordinate determining module is used for calculating based on the relative positions of the excitation sources and a spatial position calculating method to obtain the spatial coordinates of the excitation sources;
the underground pipeline position determining module is used for determining the position of the underground pipeline to be detected based on the connection line of the space coordinates of each excitation source;
wherein the optical fiber sensor is laid using an optical fiber laying apparatus as claimed in any one of claims 1 to 11.
17. A computer device, comprising:
one or more processors;
a processor for executing one or more programs;
a method of locating an underground pipeline as claimed in any one of claims 12 to 15 when the one or more programs are executed by the one or more processors.
18. A computer readable storage medium, having stored thereon a computer program which, when executed, implements a method of locating an underground pipe according to any one of claims 12 to 15.
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