CN109917448A - A kind of detection of nonmetal pipeline and localization method - Google Patents
A kind of detection of nonmetal pipeline and localization method Download PDFInfo
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- CN109917448A CN109917448A CN201910268713.9A CN201910268713A CN109917448A CN 109917448 A CN109917448 A CN 109917448A CN 201910268713 A CN201910268713 A CN 201910268713A CN 109917448 A CN109917448 A CN 109917448A
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Abstract
The invention discloses a kind of detection of nonmetal pipeline and localization methods, comprising the following steps: a, the position basic point for determining nonmetal pipeline；B, ultrasonic transmitter is installed；C, detection position is determined: according to the duct section of base position in step a, judge the substantially trend of pipeline, and be placed equidistant with several detection lines along pipeline paving set direction, detection line is vertical with pipeline paving set direction, detection line both ends are located at the two sides that pipeline substantially moves towards, and determine detection position；D, the determination of test point pipeline location；E, the determination of section pipeline rout；F, position correction；G, pipeline track is drawn.Beneficial effect is: acoustic signals are emitted by fixed position to nonmetal pipeline, after detection to acoustic signals, line, the as trend of nonmetal pipeline are carried out by choosing the maximum point of amplitude, to realize the detection and positioning of nonmetal pipeline position.
Description
Technical field
The present invention relates to buried pipeline detection technique fields, and in particular to a kind of detection of nonmetal pipeline and positioning side
Method.
Background technique
Existing buried pipeline detection technique can only detect metallic conduit, can not detect nonmetal pipeline position.
When detecting metallic conduit, using the electric conductivity of metallic conduit, an electromagnetic signal is given to metallic conduit using signal projector,
It is detected, is detected according to the electromagnetic signal power that receives and positioning metal pipeline along metallic conduit using receiver.Therefore exist
In the prior art, in order to mark the position of nonmetal pipeline, it usually needs metal tracing line is set above nonmetal pipeline, with
Convenient for carrying out the determination of pipeline location using electromagnetic technique.But due to needing to be embedded to ground when pipeline is laid in tracing line,
It increases pipeline and is laid to this, increase the construction period, and tracing line is thinner, tracer effect is difficult to ensure.
Summary of the invention
The object of the invention is that providing detection and the positioning side of a kind of nonmetal pipeline to solve the above-mentioned problems
Method, include can be by applying sound wave to nonmetal pipeline for preferred technical solution in many technical solutions provided by the invention
Signal determines pipeline rout by the amplitude detection to the acoustic signals, realizes and imitates to the technology of nonmetal pipeline position detection
Fruit, elaboration as detailed below.
To achieve the above object, the present invention provides following technical schemes:
A kind of detection of nonmetal pipeline provided by the invention and localization method, comprising the following steps: a, determine it is nonmetallic
The position basic point of pipeline: nonmetal pipeline is connected into the nonmetal pipeline in the interface or tubular service well of other pipelines
Duan Zuowei nonmetal pipeline basic point；
B, install ultrasonic transmitter: the basic point in the step a installs ultrasonic transmitter；
C, it determines detection position: according to the duct section of base position in step a, judging the substantially trend of pipeline, and along pipe
Road laying direction is placed equidistant with several detection lines, and detection line is vertical with pipeline paving set direction, and detection line both ends are located at pipe
The two sides that road substantially moves towards determine detection position；
D, the determination of test point pipeline location: ultrasonic transmitter is opened, in hand-held ultrasound signal inductor detecting step c
The ultrasonic signal intensity of each position corresponding ground in detection line, and determine the strongest point of signal strength, as pipeline rout point；
E, the determination of section pipeline rout: according to the method in the step d to the ultrasound of other detection line corresponding positions
Signal is detected, and the number of winning the confidence point of maximum intensity is connected and moved towards a little in every detection line, as pipeline is walked as pipeline rout point
To corresponding position；
F, position correction: determine that nonmetal pipeline is walked backward according to the operation order in step a- step e, in pipeline rout
Tail end end point sonic generator, the then detecting step in repeating said steps c- step e, to walking in step e are set
It is checked to point, judges the trend of pipeline；
G, it draws pipeline track: step e being connected with detection in step f with compound line alignment point, is formed nonmetallic
Pipeline moves towards figure.
Preferably, the arc-shaped seat of pipeline outer wall is close in setting on ultrasonic transmitter in the step b, arc-shaped seat is tight
The pipeline outer wall at basic point is pasted, and is bound ultrasonic transmitter on pipeline outer wall by rope.
Preferably, detection line is across pipeline, and the both ends of detection line are located at the two sides of pipeline in the step c,
Detection line length is 2m-3m, and is divided into four sections, to determine 5 test points in every detection line.
Preferably, respectively 5 test points are carried out with the signal strength detection of single-point, takes signal strength in the step d
Maximum point just moves towards a little as pipeline, and moves towards point two sides 0.2m at progress signal repetition measurement, the number of winning the confidence maximum intensity point at this
As pipeline rout point, the i.e. surface of nonmetal pipeline.
Preferably, when point is moved towards in connection, a little interval connection will be moved towards in the step e, pipeline is moved towards to carry out just
Grade amendment.
Preferably, by review point interval connection, forming secondary modified pipeline rout scribing line in the step f.
Preferably, by the way that primary modified pipeline rout scribing line and secondary modified scribing line are superimposed amendment, it is as non-
Metallic conduit moves towards figure.
To sum up, the beneficial effects of the present invention are: acoustic signals are emitted by fixed position to nonmetal pipeline, it is rear right
The detection of acoustic signals carries out line, the as trend of nonmetal pipeline by choosing the maximum point of amplitude, to realize non-gold
The detection and positioning of metal conduit position.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
The present invention provides a kind of detection of nonmetal pipeline and localization methods, comprising the following steps: a, determine it is nonmetallic
The position basic point of pipeline: nonmetal pipeline is connected into the nonmetal pipeline in the interface or tubular service well of other pipelines
Duan Zuowei nonmetal pipeline basic point, by the section as basic point of the duct section in tubular service well, it is ensured that pipeline is completely exposed, is convenient for
The installation and fixation of ultrasonic transmitter, to improve the conduction efficiency of ultrasonic transmitter transmitting ultrasonic wave；
B, install ultrasonic transmitter: the basic point in the step a installs ultrasonic transmitter, and ultrasonic transmitter is used
In to nonmetal pipeline internal emission ultrasonic wave, ultrasonic wave is, to pipeline loss, formation can chase after along pipeline conductive process
The ultrasonic signal of track after ultrasonic sensing device receives the ultrasonic signal, can judge according to the power of ultrasonic signal away from non-
The distance of metallic conduit, signal point of maximum intensity be pipeline away from ground most nearby, the as surface of pipeline, connection away from basic point not
The point of the signal of same distance most strength, as pipeline judge the trend of nonmetal pipeline with this in the projection of floor surface；
C, it determines detection position: according to the duct section of base position in step a, judging the substantially trend of pipeline, and along pipe
Road laying direction is placed equidistant with several detection lines, and detection line is vertical with pipeline paving set direction, and detection line both ends are located at pipe
The two sides that road substantially moves towards determine detection position, determine that substantially walking for pipeline draws detection line backward, to determine away from basic point difference
The detection position of distance；
D, the determination of test point pipeline location: ultrasonic transmitter is opened, in hand-held ultrasound signal inductor detecting step c
The ultrasonic signal intensity of each position corresponding ground in detection line, and determine the strongest point of signal strength, as pipeline rout point, lead to
The ultrasonic signal intensity detection to difference in detection line is crossed, the signal point of maximum intensity in detection line can be obtained, if the point is located at inspection
On survey line, then the point is subpoint of the pipeline on ground, if signal point of maximum intensity is located at the end of detection line, need to be prolonged at the end
Long detection line, until detecting then to take the signal point of maximum intensity on extension compared with the weaker test point in end, the throwing as pipeline
Shadow point；
E, the determination of section pipeline rout: according to the method in the step d to the ultrasound of other detection line corresponding positions
Signal is detected, and the number of winning the confidence point of maximum intensity is connected and moved towards a little in every detection line, as pipeline is walked as pipeline rout point
To corresponding position, connect every detection line on pipeline subpoint, that is, can determine whether the trend of pipeline；
F, position correction: determine that nonmetal pipeline is walked backward according to the operation order in step a- step e, in pipeline rout
Tail end end point sonic generator, the then detecting step in repeating said steps c- step e, to walking in step e are set
It is checked to point, judges the trend of pipeline, subpoint of the inverse detection pipeline in detection line, to eliminate the survey of single detection
Error is measured, while rejecting discrete biggish subpoint, if discrete point is more, the emissive porwer of ultrasonic transmitter should be adjusted,
Carry out the detection again of pipeline location；
G, it draws pipeline track: step e being connected with detection in step f with compound line alignment point, is formed nonmetallic
Pipeline moves towards figure, will reject it is discrete it is biggish move towards a little, then connect the coincidence point detected twice, the as strike line of pipeline
Road.
As optional embodiment, in the step b, the arc of pipeline outer wall is close in setting on ultrasonic transmitter
Seat, arc-shaped seat is close to the pipeline outer wall at basic point, and is bound ultrasonic transmitter on pipeline outer wall by rope, passes through arc
The contact area of ultrasonic transmitter and pipeline outer wall can be improved in shape seat, improves the efficiency of transmission of ultrasonic transmitter；
In the step c, detection line is across pipeline, and the both ends of detection line are located at the two sides of pipeline, detects wire length
Degree is 2m-3m, and is divided into four sections, to determine 5 test points in every detection line, is carried out respectively to 5 test points single
After only signal measurement, a measurement can be taken again in the middle part of the strongest point of signal strength, move towards point with guarantee to obtain as detection
Signal point of maximum intensity on line, to improve the position detection accuracy of pipeline distribution；
Or in the step d, respectively 5 test points are carried out with the signal strength detection of single-point, the number of winning the confidence maximum intensity
Point just moved towards a little as pipeline, and move towards point two sides 0.2m at progress signal repetition measurement, the number of winning the confidence maximum intensity point conduct at this
Pipeline rout point, the i.e. surface of nonmetal pipeline；
In the step e, when point is moved towards in connection, a little interval connection will be moved towards, moves towards to carry out primary amendment to pipeline, it will
Move towards a little interval connection, can mark it is discrete it is biggish move towards a little progress repetition measurement, to determine detection accuracy, if repetition measurement is as the result is shown
The point is still pipeline rout point, then should be included in moving towards in route for pipeline；
In the step f, by review point interval connection, secondary modified pipeline rout scribing line is formed, will move towards a little to be spaced
Connection, can mark it is discrete it is biggish move towards a little progress repetition measurement, to determine detection accuracy, if the point is still repetition measurement as the result is shown
Pipeline rout point should be then included in moving towards in route for pipeline；
By the way that primary modified pipeline rout scribing line and secondary modified scribing line superposition are corrected, as nonmetal pipeline
Figure is moved towards, after two lines road is spliced, filters out and carries out repetition measurement away from the discrete biggish point of composite line, with the trend that determination is final
Point, after being included in composite line, nonmetal pipeline can be obtained moves towards layout line map.
Emit acoustic signals by fixed position to nonmetal pipeline, after detection to acoustic signals, pass through and choose vibration
Maximum point carries out line, the as trend of nonmetal pipeline, to realize the detection and positioning of nonmetal pipeline position.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. detection and the localization method of a kind of nonmetal pipeline, which comprises the following steps:
A, it determines the position basic point of nonmetal pipeline: nonmetal pipeline is connected to the interface or tubular service of other pipelines
Nonmetal pipeline section in well is as nonmetal pipeline basic point；
B, install ultrasonic transmitter: the basic point in the step a installs ultrasonic transmitter；
C, it determines detection position: according to the duct section of base position in step a, judging the substantially trend of pipeline, and along pipeline paving
Set direction is placed equidistant with several detection lines, and detection line is vertical with pipeline paving set direction, and it is big that detection line both ends are located at pipeline
The two sides of trend are caused, determine detection position；
D, the determination of test point pipeline location: ultrasonic transmitter is opened, is detected in hand-held ultrasound signal inductor detecting step c
The ultrasonic signal intensity of each position corresponding ground on line, and determine the strongest point of signal strength, as pipeline rout point；
E, the determination of section pipeline rout: according to the method in the step d to the ultrasonic signal of other detection line corresponding positions
It is detected, the number of winning the confidence point of maximum intensity connected and moved towards a little in every detection line as pipeline rout point, as pipeline rout
Corresponding position；
F, position correction: determine that nonmetal pipeline is walked backward according to the operation order in step a- step e, in the tail of pipeline rout
Hold end point that sonic generator is set, then the detecting step in repeating said steps c- step e, to moving towards a little in step e
It is checked, judges the trend of pipeline；
G, it draws pipeline track: step e being connected with detection in step f with compound line alignment point, forms nonmetal pipeline
Move towards figure.
2. a kind of detection of nonmetal pipeline and localization method according to claim 1, it is characterised in that: in the step b,
The arc-shaped seat of pipeline outer wall is close in setting on ultrasonic transmitter, and arc-shaped seat is close to the pipeline outer wall at basic point, and passes through rope
By ultrasonic transmitter binding on pipeline outer wall.
3. a kind of detection of nonmetal pipeline and localization method according to claim 1, it is characterised in that: in the step c,
Detection line is across pipeline, and the both ends of detection line are located at the two sides of pipeline, and detection line length is 2m-3m, and is divided into four
Section, to determine 5 test points in every detection line.
4. a kind of detection of nonmetal pipeline and localization method according to claim 3, it is characterised in that: in the step d,
Respectively 5 test points are carried out with the signal strength detection of single-point, the point of the number of winning the confidence maximum intensity just moves towards a little as pipeline, and
This moves towards to carry out signal repetition measurement at point two sides 0.2m, and the number of winning the confidence maximum intensity point is as pipeline rout point, i.e. nonmetal pipeline
Surface.
5. a kind of detection of nonmetal pipeline and localization method according to claim 1, it is characterised in that: in the step e,
When point is moved towards in connection, a little interval connection will be moved towards, moves towards to carry out primary amendment to pipeline.
6. a kind of detection of nonmetal pipeline and localization method according to claim 5, it is characterised in that: in the step f,
By review point interval connection, secondary modified pipeline rout scribing line is formed.
7. a kind of detection of nonmetal pipeline and localization method according to claim 6, it is characterised in that: by repairing primary
Positive pipeline rout scribing line and secondary modified scribing line superposition correct, and as nonmetal pipeline moves towards figure.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111522014A (en) * | 2020-06-05 | 2020-08-11 | 西南石油大学 | High-precision underground PE pipe detection device and method with self-adaptive capacity |
| WO2020258341A1 (en) * | 2019-06-24 | 2020-12-30 | 太仓华淏信息科技有限公司 | Underground pipeline positioning device |
| CN115793035A (en) * | 2022-11-11 | 2023-03-14 | 北京信息科技大学 | Underground nonmetal pipeline detection system and method based on sound wave active excitation |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036981A (en) * | 1983-08-08 | 1985-02-26 | Showa Electric Wire & Cable Co Ltd | Detection of pipeline position |
| JPS60238779A (en) * | 1984-05-12 | 1985-11-27 | Mitsutoshi Endo | Soil nature detecting method |
| GB9703596D0 (en) * | 1996-02-27 | 1997-04-09 | Thames Water Utilities | Pipework position and connection determining apparatus |
| JPH10197240A (en) * | 1997-01-14 | 1998-07-31 | Kuraimu:Kk | Method for exploring underground buried pipe |
| CN102508287A (en) * | 2011-10-17 | 2012-06-20 | 大连海事大学 | Underwater object detection device |
| CN102830436A (en) * | 2012-09-26 | 2012-12-19 | 上海海事大学 | Underground non-metal pipeline distribution probing device and method based on ultrasonic sensor |
| CN102841370A (en) * | 2012-09-25 | 2012-12-26 | 上海海事大学 | Underground pipeline detection device and method based on reflection-type ultrasonic sensor |
| CN104777510A (en) * | 2015-04-13 | 2015-07-15 | 梁步阁 | Autonomous multi-mode composite pipe positioning and exploration system and implementing method thereof |
| CN105909980A (en) * | 2016-04-20 | 2016-08-31 | 韩山师范学院 | Underground pipeline leakage point positioning method based on combination of amplitude fading and correlative detection |
| CN106249305A (en) * | 2016-08-27 | 2016-12-21 | 上海煤气第二管线工程有限公司 | A kind of underground non-metal line detection device and using method thereof |
| CN107064995A (en) * | 2017-04-18 | 2017-08-18 | 江苏莘翔机电有限公司 | A kind of acoustics method for positioning underground pipeline based on DSP |
| CN206531981U (en) * | 2016-08-27 | 2017-09-29 | 上海煤气第二管线工程有限公司 | A kind of underground non-metal line detection device |
| CN107907906A (en) * | 2017-11-20 | 2018-04-13 | 上海新奥新能源技术有限公司 | A kind of Electromagnetic Survey of Underground Pipelines device |
| RU2650747C1 (en) * | 2017-02-09 | 2018-04-17 | Общество с ограниченной ответственностью "ТЕХНОАС-СК" | Method and device for determining the location of the pipeline passage |
| CN108333623A (en) * | 2018-01-29 | 2018-07-27 | 中国科学院声学研究所 | A kind of buried pipeline detection device and method based on sound wave reflection |
-
2019
- 2019-04-04 CN CN201910268713.9A patent/CN109917448A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036981A (en) * | 1983-08-08 | 1985-02-26 | Showa Electric Wire & Cable Co Ltd | Detection of pipeline position |
| JPS60238779A (en) * | 1984-05-12 | 1985-11-27 | Mitsutoshi Endo | Soil nature detecting method |
| GB9703596D0 (en) * | 1996-02-27 | 1997-04-09 | Thames Water Utilities | Pipework position and connection determining apparatus |
| JPH10197240A (en) * | 1997-01-14 | 1998-07-31 | Kuraimu:Kk | Method for exploring underground buried pipe |
| CN102508287A (en) * | 2011-10-17 | 2012-06-20 | 大连海事大学 | Underwater object detection device |
| CN102841370A (en) * | 2012-09-25 | 2012-12-26 | 上海海事大学 | Underground pipeline detection device and method based on reflection-type ultrasonic sensor |
| CN102830436A (en) * | 2012-09-26 | 2012-12-19 | 上海海事大学 | Underground non-metal pipeline distribution probing device and method based on ultrasonic sensor |
| CN104777510A (en) * | 2015-04-13 | 2015-07-15 | 梁步阁 | Autonomous multi-mode composite pipe positioning and exploration system and implementing method thereof |
| CN105909980A (en) * | 2016-04-20 | 2016-08-31 | 韩山师范学院 | Underground pipeline leakage point positioning method based on combination of amplitude fading and correlative detection |
| CN106249305A (en) * | 2016-08-27 | 2016-12-21 | 上海煤气第二管线工程有限公司 | A kind of underground non-metal line detection device and using method thereof |
| CN206531981U (en) * | 2016-08-27 | 2017-09-29 | 上海煤气第二管线工程有限公司 | A kind of underground non-metal line detection device |
| RU2650747C1 (en) * | 2017-02-09 | 2018-04-17 | Общество с ограниченной ответственностью "ТЕХНОАС-СК" | Method and device for determining the location of the pipeline passage |
| CN107064995A (en) * | 2017-04-18 | 2017-08-18 | 江苏莘翔机电有限公司 | A kind of acoustics method for positioning underground pipeline based on DSP |
| CN107907906A (en) * | 2017-11-20 | 2018-04-13 | 上海新奥新能源技术有限公司 | A kind of Electromagnetic Survey of Underground Pipelines device |
| CN108333623A (en) * | 2018-01-29 | 2018-07-27 | 中国科学院声学研究所 | A kind of buried pipeline detection device and method based on sound wave reflection |
Non-Patent Citations (3)
| Title |
|---|
| 曾岳梅 等: "埋地PE管道声学定位探测技术应用研究", 《煤气与热力》 * |
| 王龙 等: "浅谈GPPL在燃气PE管道定位中的应用", 《百度文科》 * |
| 耿旭兴 等: "基于超声波的非金属管道测量仪的设计", 《智富时代》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020258341A1 (en) * | 2019-06-24 | 2020-12-30 | 太仓华淏信息科技有限公司 | Underground pipeline positioning device |
| CN111522014A (en) * | 2020-06-05 | 2020-08-11 | 西南石油大学 | High-precision underground PE pipe detection device and method with self-adaptive capacity |
| CN115793035A (en) * | 2022-11-11 | 2023-03-14 | 北京信息科技大学 | Underground nonmetal pipeline detection system and method based on sound wave active excitation |
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Application publication date: 20190621 |