CN106569283B - A kind of detection of buried irony pipeline and accurate positioning method based on magnetizing field indirect detection - Google Patents
A kind of detection of buried irony pipeline and accurate positioning method based on magnetizing field indirect detection Download PDFInfo
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- CN106569283B CN106569283B CN201610993338.0A CN201610993338A CN106569283B CN 106569283 B CN106569283 B CN 106569283B CN 201610993338 A CN201610993338 A CN 201610993338A CN 106569283 B CN106569283 B CN 106569283B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/081—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices the magnetic field is produced by the objects or geological structures
Abstract
The invention belongs to Electromagnetic Survey of Underground Pipelines fields, and in particular to a kind of pipeline detection and localization method based on buried irony pipeline magnetizing field indirect detection.Concrete methods of realizing is in line detection array using triaxial magnetic field sensor group, in detected region adjacent ground surface magnetic induction intensity spatial abnormal feature is detected along straight line detective path, minimum detection magnetic field three-component remotely is influenced as background magnetic field by magnetic anomaly apart from magnetic induction intensity anomaly peak point using on detective path, vector size is sought after detection magnetic field three-component on each measuring point is subtracted background magnetic field three-component as magnetizing field, and underground utilities horizontal distribution is positioned using the peak value line for calculating gained magnetizing field per probe detection all the way.Pipeline detection accurate positioning of the present invention, equipment cost and use cost are cheap, and instrumentation is easy.
Description
Technical field
The invention belongs to Electromagnetic Survey of Underground Pipelines fields, and in particular to a kind of buried irony pipe based on magnetizing field indirect detection
Line detects and accurate positioning method.
Background technology
Due to being changed etc. history, humanity and geology so that underground utilities distributed intelligence is unknown, so as to cause pipeline plus
Leakage is played during close laying, road construction excavation, engineering investigation and construction piling or is occurred often the phenomenon that digging disconnected underground utilities,
The safety accidents such as oil gas leakage, water power interruption are caused, industrial or agricultural normally production and people's daily life are seriously affected.Therefore, work
Before journey construction, verifies the presence or absence of construction area underground utilities and determine that pipeline horizontal distribution is of crucial importance.
Underground utilities category of piping materials is various, and embedded situation is varied, and the mode thousand detected for different pipelines is poor
Ten thousand are not.Cast iron pipe, galvanized iron conduit, stainless steel tube, stainless steel composite pipe and PCCP pipes are made of steel and other pipeline materials, this
The pipeline of a little types may be collectively referred to as iron pipe.Currently, the water supply heating of most oil-gas gathering and transferring pipeline, the overwhelming majority
Pipeline and part common trench, rain dirt flowing line are iron pipe, and it is mostly to cast especially to be laid with older underground utilities
Iron pipe material.Since the magnetic susceptibility characteristics of underground irony pipeline and the susceptibility difference of surrounding soil are larger, the magnetization in earth's magnetic field
Under will produce obviously magnetic anomaly, therefore, can by detect ground magnetic anomaly distribution come Underground irony pipeline
Distribution.
Currently, underground irony pipeline magnetic anomaly detection is mainly to detect based on total magnetic anomaly, based on total intensity of magnetic anomaly point
Cloth can effectively judge the presence or absence of underground irony pipeline, but be unable to judge accurately underground utilities based on total intensity of magnetic anomaly distribution
Horizontal position.Bus magnetic anomaly caused by the irony pipeline of underground is distributed by earth magnetism distribution characteristics, pipeline rout, pipe
The influence of road remanent magnetism, total magnetic anomaly detection tracing pattern perpendicular to pipeline trend can change therewith, whether Curve Maximization, also
It is that predetermined characteristic point all can not accurately indicate the horizontal position of underground irony pipeline axis on Curve Maximization line.In addition to
Pipeline horizontal position is accurately positioned for instructing excavation and piling construction, to avoid accident in the presence or absence of Underground irony pipeline
Seem even more important.
Invention content
The purpose of the present invention is be directed to the total magnetic anomaly detection positioning of buried irony pipeline at present there are the problem of, one kind is provided
Buried irony pipeline detection based on magnetizing field indirect detection and accurate positioning method.
Total magnetic anomaly is underground irony pipeline by between the earth's magnetic field magnetization pipeline magnetic anomaly generated and earth magnetism ambient field
Vector sum, since the total magnetic anomaly tracing pattern of survey line is influenced by pipeline azimuth, magnetic dip angle, magnetic declination and pipeline remanent magnetism distribution,
Therefore total magnetic anomaly curve maximum or minimum value can not accurately indicate the horizontal position of conduit axis；The magnetic generated after pipeline magnetization
The calculated curve of field vector modulus value be axially symmetric structure, only exist peak-peak and without minimum valley, pipeline magnetizing field peak
Value indicates that conduit axis horizontal position is much higher compared with the pipe level positional accuracy that total magnetic anomaly is most worth instruction is detected；Based on this
Premise, the present invention propose it is a kind of based on magnetizing field indirect detection buried irony pipeline detection and accurate positioning method, the party
The realization of method includes the following steps：
Step 1 is mounted on group in moveable detection device by multiple high-precision triaxial magnetic field sensors and is in line detection
Array；
Step 2, in detected region, earth's surface delimit a plurality of straight line as preliminary survey detective path, the preliminary survey detective path
Length covering is detected region；
Step 3, along the preliminary survey detective path of delimitation, using straight line detection array perpendicular to preliminary survey detective path close
On Earth surface plane, preliminary survey measuring point magnetic field three-component is detected successively according to the distance of setting；
Step 4, in different directions chosen distance as a reference point with the corresponding sensing point of magnetic induction intensity maximum value
Reference point is three-component average compared with multiple measuring point magnetic fields of quiet region not less than 16 meters of fixed range, magnetic induction intensity fluctuation
Value is used as background magnetic field three-component, after location survey measuring point magnetic field three-component is subtracted background magnetic field three-component, calculates pipeline magnetizing field
Magnetic induction intensity, specific formula for calculation is as follows：
In above formula,For measuring pointMagnetizing field magnetic induction intensity,For measuring pointMagnetic fieldAxial component,
For measuring pointMagnetic fieldAxial component,For measuring pointMagnetic fieldAxial component,For background magnetic fieldAxial component,For
Background magnetic fieldAxial component,For background magnetic fieldAxial component；
Step 5 calculates the pipeline magnetizing field magnetic induction intensity of each measuring point of search coverage, it is strong to draw corresponding magnetic induction
EDS maps of writing music can judge that there are underground irony pipes if detection calculates magnetizing field strength distribution there are the distribution of apparent strip
Line.The substantially trend for irony pipeline of being sunken cord using the positioning of magnetizing field maximum of points, the more of search coverage can be covered by delimiting again
Parallel lines is as location survey detective path, and the angle that the location survey detective path is substantially moved towards with aforementioned buried irony pipeline is not
Less than 10 °, every one section of equal distance measurement location survey measuring point magnetic field three-component on location survey detective path；
Step 6 is drawn the magnetic induction intensity curved surface distribution of all location survey regions magnetizing field, is passed using each three-axle magnetic field
Magnetizing field curve maximum point that the probe detection of sensor the is calculated coordinate in detection plane indicates minute of underground utilities
Cloth.
To the further supplement of the above, fixed range described in the step 4 is 20 meters, the basis in practical operation
Magnetic anomaly size caused by pipeline determines the numerical value of fixed range.
To the further supplement of the above, it is bent to draw corresponding magnetic induction intensity for the magnetic induction intensity as obtained by calculating
EDS maps, magnetic induction intensity fluctuate tranquiler region and can determine in corresponding position without buried irony pipeline, conversely, then existing
Corresponding positions are equipped with buried irony pipeline, at this point, the substantially trend for irony pipeline of being sunken cord using the positioning of magnetizing field maximum of points, in order to
Reach preferable Detection location effect, exist in the determining irony pipeline of sunkening cord of preliminary detection and substantially walk backward, delimit and visit again
It surveys path and covers search coverage, detective path moves towards angle minimum with the conduit axis primarily determined and is not less than 10 °, with 90 ° of sides
To best.
To the further supplement of the above, the background magnetic field for reference comes from detected region and is surveyed with Primary field
Measure data.
To the further supplement of the above, when triaxial magnetic field sensor is installed, three axial directions are consistent, and measuring point is located at same
On one straight line；When magnetizing field detection calculates, the centrally located magnetic field sensor of straight line detection array is located at detective path
The surface of line, detection array is perpendicular to detective path.
The present invention has the following advantages compared with prior art：
（1）The present invention is using the presence or absence of pipeline magnetizing field Underground irony pipeline, for total magnetic anomaly detection,
It can more accurately judge the existence of underground utilities；
（2）The present invention positioningly descends the horizontal position of irony pipeline using the peak value of pipeline magnetizing field detection calculated curve,
It is not influenced by the distribution of pipeline remanent magnetism；
（3）The present invention positioningly descends the horizontal position of irony pipeline using the peak value of pipeline magnetizing field detection calculated curve,
Influenced very little in earth magnetism feature by pipeline rout, when encountering extreme terrain in detection process, can not with detective path with just
When the determining conduit axis of step moves towards 90 ° of implementation of angle, is positioned, fitted using peak value as long as the angle is more than 10 °
It is wider with range；
（4）The present invention can be based on existing total buried irony pipeline survey meter of magnetic anomaly, use method proposed by the present invention
Carrying out magnetic data processing and analysis can drop for having the user of total buried irony pipeline survey meter of magnetic anomaly
It is low to use input cost, improve detection accuracy.
Description of the drawings
Fig. 1 different buried depth irony pipeline magnetizing field peak levels position schematic diagram.
Fig. 2 is the flow chart of buried irony pipeline detection and accurate positioning method based on magnetizing field indirect detection.
Wherein,For measuring pointMagnetizing field magnetic induction intensity,For buried depth of pipeline,For measuring point on survey lineIt is horizontal
Coordinate.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with analog result, to this hair
Bright specific implementation mode is described in further details；It should be appreciated that specific embodiment described herein is only explaining this hair
It is bright, it is not intended to limit the present invention.
Embodiment
Such as the operating process that Fig. 2 is buried irony pipeline detection and accurate positioning method based on magnetizing field indirect detection
Figure, in the present embodiment, operation detailed process is：By 9 precision be 1nT small-sized triaxial magnetic field sensor with every between 10cm
Every on aluminum detection holder, 9 triaxial magnetic field sensor measuring points are located along the same line, three axial directions of sensor
It corresponds to respectively identical；Adjustment instrument makes the magnetic-field measurement numerical value difference of different sensors same axial in uniform magnetic field small as possible
In 1nT.
The preliminary survey detective path survey calculation for the use of the length that straight line detection array delimited along search coverage being 20m magnetizes
The magnetic induction intensity spatial abnormal feature of field, tentatively judges the presence or absence of underground irony pipeline and substantially moves towards；If preliminary judge exist
Underground irony pipeline, it is determined that pipeline tentatively moves towards；According to detected region topographic features, selection one is as possible perpendicular to pipeline
30 parallel lines delimited as location survey detective path in the direction of trend, and 1m is divided between adjacent path；Magnetic induction intensity is visited extremely
When survey, the neutral magnetic field sensor of straight line detection array is located at the surface of location survey detective path line, and detection array is perpendicular to fixed
Survey detective path.
The magnetizing field strength distribution core for the underground irony pipeline that detection is calculated is at curved surface, by magnetizing field strength point
Cloth curved surface further determines that the presence or absence of underground irony pipeline；The peak value of magnetizing field curve obtained by every detective path positions pipeline
Horizontal position of the axis on test surface；It is as shown in Figure 1 outer diameter 50cm, thickness 5mm, magnetic susceptibility 200SI, pipeline is with respect to earth magnetism
When arctic azimuth is 30 °, different buried depth of pipelineUnder the conditions of pipeline magnetize curvature of field line chart, in figure different magnetizing field curves by
Caused by the corresponding buried irony pipeline of identical line style, buried depth of pipeline is deeper, and magnetizing field peak value is smaller, i.e.,Numerical value is bigger, survey line
The magnetic induction intensity of the corresponding magnetizing field of upper measuring point abscissa positionsPeak value is smaller.
The symmetry of pipeline magnetic field curve is preferable under the conditions of Fig. 1 display different buried depths, and peak level position error is opposite
It can ignore for curve survey line length, simulation is calculation shows that peak level positioning is no more than relative to the error maximum of buried depth
4.5%。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (6)
1. a kind of detection of buried irony pipeline and accurate positioning method based on magnetizing field indirect detection, which is characterized in that including
Following steps：
Step 1 is in line mounted on group in moveable detection device by multiple high-precision triaxial magnetic field sensors and detects battle array
Row；
Step 2, in detected region, earth's surface delimit a plurality of straight line as preliminary survey detective path, the preliminary survey detective path length
Covering is detected region；
Step 3, along the preliminary survey detective path of delimitation, using straight line detection array perpendicular to preliminary survey detective path near surface
In plane, preliminary survey measuring point magnetic field three-component is detected successively according to the distance of setting；
Step 4, as a reference point with the corresponding sensing point of magnetic induction intensity maximum value, chosen distance refers in different directions
Point is made not less than 16 meters of fixed range, magnetic induction intensity fluctuation compared with the three-component average value in multiple measuring point magnetic fields of quiet region
For background magnetic field three-component, after location survey measuring point magnetic field three-component is subtracted background magnetic field three-component, the magnetic of pipeline magnetizing field is calculated
Induction, specific formula for calculation are as follows：
In above formula,For measuring pointMagnetizing field magnetic induction intensity,For measuring pointMagnetic fieldAxial component,To survey
PointMagnetic fieldAxial component,For measuring pointMagnetic fieldAxial component,For background magnetic fieldAxial component,For background
Magnetic fieldAxial component,For background magnetic fieldAxial component；
Step 5 calculates the pipeline magnetizing field magnetic induction intensity of each measuring point of search coverage, and it is bent to draw corresponding magnetic induction intensity
EDS maps can judge, there are underground irony pipeline, to make if detection calculates magnetizing field strength distribution there are the distribution of apparent strip
The substantially trend for irony pipeline of being sunken cord with the positioning of magnetizing field maximum of points, a plurality of parallel of search coverage can be covered by delimiting again
As location survey detective path, the angle that the location survey detective path is substantially moved towards with aforementioned buried irony pipeline is not less than straight line
10 °, every one section of equal distance measurement location survey measuring point magnetic field three-component on location survey detective path；
Step 6 draws the magnetic induction intensity curved surface distribution of location survey region magnetizing field, uses the spy of each triaxial magnetic field sensor
The head detection magnetizing field curve maximum point that the is calculated coordinate in detection plane indicates the distribution of underground utilities.
2. a kind of detection of buried irony pipeline and the side of being accurately positioned based on magnetizing field indirect detection according to claim 1
Method, which is characterized in that fixed range described in the step 4 is 20 meters.
3. a kind of detection of buried irony pipeline and the side of being accurately positioned based on magnetizing field indirect detection according to claim 1
Method, which is characterized in that in the step 5, the magnetizing field magnetic induction intensity as obtained by calculating draws corresponding magnetic induction intensity
Curved surface is distributed, and magnetic induction intensity fluctuates tranquiler region and can determine in corresponding position without buried irony pipeline, conversely, then
It is equipped with buried irony pipeline or other magnetic source chaff interferents in corresponding positions, at this point, positioning irony of sunkening cord using magnetizing field maximum of points
The horizontal position of pipeline.
4. a kind of detection of buried irony pipeline and the side of being accurately positioned based on magnetizing field indirect detection according to claim 1
Method, which is characterized in that the angle that the location survey detective path is substantially moved towards with aforementioned buried irony pipeline is 90 °, being capable of basis
Actual landform situation accordingly adjusts.
5. a kind of detection of buried irony pipeline and the side of being accurately positioned based on magnetizing field indirect detection according to claim 1
Method, which is characterized in that the background magnetic field for reference comes from detected region with a magnetic-field measurement data.
6. a kind of detection of buried irony pipeline and the side of being accurately positioned based on magnetizing field indirect detection according to claim 1
Method, which is characterized in that when triaxial magnetic field sensor is installed, three axial directions are consistent, and measuring point is located along the same line.
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| CN111025408A (en) * | 2018-10-10 | 2020-04-17 | 中央大学 | Artificial object structure scanning device and scanning method thereof |
| CN111158058B (en) * | 2018-11-08 | 2024-03-22 | 中国石油化工股份有限公司 | Method for detecting metal abandoned well based on geomagnetic memory |
| CN109883450B (en) * | 2019-04-11 | 2021-08-24 | 中国石油化工股份有限公司 | Method for positioning magnetic marker of detector in buried steel pipeline |
| CN110260044B (en) * | 2019-06-06 | 2020-12-04 | 天津大学 | Submarine pipeline positioning method |
| CN110531430A (en) * | 2019-08-29 | 2019-12-03 | 中国石油天然气集团公司 | Processing method, device and the electronic equipment of submarine pipeline magnetic survey data |
| CN111239838B (en) * | 2020-01-16 | 2022-04-12 | 哈尔滨工业大学 | Detection method for magnetic detection precision |
| CN111221046B (en) * | 2020-01-21 | 2021-01-22 | 清华大学 | Three-dimensional tracking method and device for in-pipeline detector |
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| US6868922B2 (en) * | 2000-11-10 | 2005-03-22 | Kddi Corporation | Method for measuring digging positions |
| CN2591646Y (en) * | 2002-06-28 | 2003-12-10 | 清华大学 | Underground ferromagnetic pipe detecting instrument |
| CN2842449Y (en) * | 2005-05-25 | 2006-11-29 | 淄博威特电气有限公司 | Digital metal pipeline path tracing identifying device |
| JP6359846B2 (en) * | 2014-03-17 | 2018-07-18 | 大阪瓦斯株式会社 | Method and apparatus for detecting buried metal |
| CN104020495B (en) * | 2014-06-24 | 2015-05-06 | 中国矿业大学(北京) | Automatic underground pipeline parameter recognizing method on basis of ground penetrating radar |
| CN104076404B (en) * | 2014-07-02 | 2016-10-19 | 中国科学院电子学研究所 | Use multichannel to be concerned with and suppress the magnetic anomaly detection method of earth magnetism background noise |
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