CN109681785A - A kind of Non-contact Magnetic stress mornitoring system and application method - Google Patents
A kind of Non-contact Magnetic stress mornitoring system and application method Download PDFInfo
- Publication number
- CN109681785A CN109681785A CN201910047386.4A CN201910047386A CN109681785A CN 109681785 A CN109681785 A CN 109681785A CN 201910047386 A CN201910047386 A CN 201910047386A CN 109681785 A CN109681785 A CN 109681785A
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- Prior art keywords
- pipeline
- magnetic
- magnetic field
- stress
- measurement
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/85—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using magnetographic methods
Abstract
The invention discloses a kind of Non-contact Magnetic stress mornitoring system and application methods, comprising the following steps: S1 carries out preliminary analysis to Awaiting Overhaul pipeline；S3 detects pipeline；S4 is carried out carrying out data processing and signal is analyzed to recording detection data；S5 determines the pipe section coordinate of magnetic anomaly according to composite index, and analyzes the defect danger classes for obtaining pipeline at the coordinate, and make analysis to pipeline overall stress situation；S6, the processing of data result.Measurement data is accurate in the present invention, and the preparation before measurement makes side face process time saving and energy saving, improve measurement efficiency and measurement it is accurate；Meanwhile, it is capable to which progress checks detection data according to the positioning to magnetic field abnormal area and record afterwards, to find out the deficiency of measurement method, to avoid in measurement next time, and then reduce error.
Description
Technical field
The present invention relates to Non-contact Magnetic stress mornitoring field more particularly to a kind of Non-contact Magnetic stress mornitoring system and
Application method.
Background technique
Pipeline largely uses and its important in city, is called the blood vessel in city.
At present to the common detection means of pipeline tube body mainly divide it is interior detection and outer detection two parts, it is interior detection mainly for
Long defeated main pipeline effect is best.But testing cost is high, needs receiving ball tube device, and inconvenience carries out complicated branch line or yard inspection
It surveys.Outer detection mainly has conventional lossless outer detection and ultrasonic guided wave detecting etc., and conventional lossless outer detection includes conventional Ultrasound, magnetic powder
The methods of with infiltration, it can detect the wall thickness and the defect inside corrosion default and weld seam etc. of pipeline, be suitable for after screening to specific
The reinspection at position.It need to excavate and strip erosion resistant coating and contact tube wall, and be only limited to detect excavation point.Ultrasonic guided wave detecting can
To detect to an excavation point two sides certain distance, it is suitable for complicated technology pipeline or yard.But by buried corrosion-resistant medium
It influences, usual detecting distance and detection accuracy are lower, multi-purpose to do screening.
Often there is the pipeline section for being largely not easy to implement interior detection in Practical Project, excavating detection cannot accomplish to cover completely again
Lid whole tube section, therefore there is an urgent need to a kind of pipeline tube body detection techniques of no-dig technique, thus mitigate the work difficulty of pipe detection,
Reduce pipe detection expense.
Summary of the invention
To solve technical problem present in background technique, the present invention propose a kind of Non-contact Magnetic stress mornitoring system and
Application method, measurement accuracy is high, and measurement efficiency is high, and easy to use, process is simple and at low cost.
A kind of Non-contact Magnetic stress mornitoring system proposed by the present invention and application method, comprising the following steps:
S1 carries out preliminary analysis to Awaiting Overhaul pipeline；The pipe arrangement orientation in region to be measured is analyzed, preliminary judgement may
The position of defect of pipeline, and record pipe arrangement environment occurs；
S2 clears up path where pipe under test, detects pipeline path by pipeline path searcher, and utilize
GPS positioning system determines path detection zero point；The axis of pipeline is marked, on the ground to make a mark to path；
S3 detects pipeline；Operator holds magnetic stress detection device, the axis direction of the pipeline marked along S2
It advances and detects；The magnetic parameter of magnetic flux leakage is detected above pipeline section to be detected using sensor probe and records testing number
According to；Wherein, magnetic field abnormal area is positioned and is recorded；
S4 is carried out carrying out data processing and signal is analyzed to recording detection data；Magnetic field stress value knot on pipeline path
Exceptions area is closed along the relationship of conduit axis direction magnetic field distribution density, determines the composite index of each test point；
S5 determines the pipe section coordinate of magnetic anomaly according to composite index, and analyzes the defect for obtaining pipeline at the coordinate
Danger classes, and analysis is made to pipeline overall stress situation；Wherein, it is determined by experiment accordingly according to the pipeline of different situations
Magnetic field gradient thresholds, if detect magnetic field value sign reversing and magnetic field gradient variation be more than thresholds, it can judgement
There are stress concentration phenomenons for tube body at this；
S6, the processing of data result；Label need to excavate the position in verification hole and be excavated on pipeline path, verify
Carry out additional tube contacts formula non-destructive testing with conventional method in hole, according to the actual conditions in verification hole and composite index and
Magnetic anomaly grade is compared, and last modification is made to danger classes and diagnostic result, finally submits final diagnosis testing result
Preferably, to correlativity existing for the pipeline magnetic field signal of non-cpntact measurement and local landforms, buried depth of pipeline,
And cable staggered with pipeline, power transmission line, metal object are influenced caused by magnetic-field measurement, before S4, compensate external interference
Influence, associated magnetic field data are corrected.
Preferably, it in pipeline path searcher, using encoder as range sensor, is recorded when for along pipeline scanning
Position.
Preferably, in S2, using the working form or time recording working form for counting long unit, by sensor probe from
The distance that 200-300 millimeters of earth's surface right above pipeline along pipeline advance, using magnetic field sensor record changes of magnetic field come
Examine the information for releasing pipeline conditions；Operator advances simultaneously, needs to keep the variation in magnetic field on observation instrument panel；Recording magnetic field is different
Normal feature, and present position is described.
Preferably, in S3, magnetic field signal curve and gradient curve are analyzed, so that it is determined that magnetic field abnormal area.
Preferably, excavation verifying is carried out to magnetic field abnormal area, with visual inspection or uses contact magnetic stress detection side
Stress concentration region or defective locations are found out on the surface of method pipeline；Stress concentration region, weld seam and neighbouring position make ultrasonic inspection,
Thickness measuring, EDDY CURRENT etc. are to determine defect severity.
In the present invention, measurement data is accurate, and the preparation before measurement makes side face process time saving and energy saving, improves measurement
Efficiency and measurement it is accurate；Meanwhile, it is capable to be carried out according to the positioning to magnetic field abnormal area and record afterwards to detection data
It is checked, to find out the deficiency of measurement method, to avoid in measurement next time, and then reduces error.
In the present invention, Non-contact Magnetic stress mornitoring system and application method are accurately detected in measurand with stress collection
The hazardous components and position that middle area is characterized；In detection process, using self-magnetization phenomenon of the equipment in earth's magnetic field without
Special magnetizing equipment is not necessary to carry out the surface of examined workpiece cleaning or other pretreatments, the influence very little of Lift-off effect, if
Standby light, operation rapid and convenient, high sensitivity, repeatability and good reliability, can quick identified sign concentrated area, be suitable for big
The generaI investigation of area.
Specific embodiment
A kind of Non-contact Magnetic stress mornitoring system proposed by the present invention and application method, comprising the following steps:
S1 carries out preliminary analysis to Awaiting Overhaul pipeline；The pipe arrangement orientation in region to be measured is analyzed, preliminary judgement may
The position of defect of pipeline, and record pipe arrangement environment occurs；It is convenient that pipe under test is detected in work, it is convenient for
The follow-up work of staff finds pipe-line convenient for staff.
S2 clears up path where pipe under test, detects pipeline path by pipeline path searcher, and utilize
GPS positioning system determines path detection zero point；The axis of pipeline is marked, on the ground to make a mark to path；Wherein, it uses
Encoder is as range sensor, record position when for along pipeline scanning；In work, encoder be convenient for the data of record into
Row number is checked convenient for staff；Meanwhile on the ground by the axis markers of pipeline, in order to the subsequent number of staff
According to measurement, convenient for improving working efficiency, raising DATA REASONING is accurate, improves work quality.
Correlativity, Ji Yuguan existing for pipeline magnetic field signal and local landforms, buried depth of pipeline to non-cpntact measurement
The staggered cable in road, power transmission line, metal object are influenced caused by magnetic-field measurement, before S4, compensate the influence of external interference,
Associated magnetic field data are corrected；In work, interference is corrected, to avoid error, improves the accurate of measurement data
Degree improves work quality.
In specific embodiment, using the working form or time recording working form for counting long unit, by sensor probe
It advances right above pipeline along pipeline with a distance from 200-300 millimeters of earth's surface, records changes of magnetic field using magnetic field sensor
To examine the information for releasing pipeline conditions；Operator advances simultaneously, needs to keep the variation in magnetic field on observation instrument panel；Recording magnetic field
Abnormal feature, and present position is described；In work, by the above measurement method, the accuracy of measurement is improved, is guaranteed
What is measured is accurate.
S3 detects pipeline；Operator holds magnetic stress detection device, the axis direction of the pipeline marked along S2
It advances and detects；The magnetic parameter of magnetic flux leakage is detected above pipeline section to be detected using sensor probe and records testing number
According to；Wherein, magnetic field abnormal area is positioned and is recorded；Meanwhile magnetic field signal curve and gradient curve are analyzed, from
And determine magnetic field abnormal area.
In work, operator advances along the axis direction of pipeline and detects, easy to operate, time saving and energy saving；Wherein, to magnetic field
Abnormal area is positioned and is recorded, and convenient for checking detection data afterwards, the deficiency of measurement method is found out, thus under
It is avoided in secondary measurement, and then reduces error.
S4 is carried out carrying out data processing and signal is analyzed to recording detection data；Magnetic field stress value knot on pipeline path
Exceptions area is closed along the relationship of conduit axis direction magnetic field distribution density, determines the composite index of each test point；
S5 determines the pipe section coordinate of magnetic anomaly according to composite index, and analyzes the defect for obtaining pipeline at the coordinate
Danger classes, and analysis is made to pipeline overall stress situation；Wherein, it is determined by experiment accordingly according to the pipeline of different situations
Magnetic field gradient thresholds, if detect magnetic field value sign reversing and magnetic field gradient variation be more than thresholds, it can judgement
There are stress concentration phenomenons for tube body at this；
S6, the processing of data result；Label need to excavate the position in verification hole and be excavated on pipeline path, verify
Carry out additional tube contacts formula non-destructive testing with conventional method in hole, according to the actual conditions in verification hole and composite index and
Magnetic anomaly grade is compared, and last modification is made to danger classes and diagnostic result, finally submits final diagnosis testing result.
In specific embodiment, excavation verifying is carried out to magnetic field abnormal area, is answered with visual inspection or using contact magnetic
Stress concentration region or defective locations are found out on the surface of power detection method pipeline；Make in stress concentration region, weld seam and neighbouring position
Ultrasonic inspection, thickness measuring, EDDY CURRENT etc. are to determine defect severity
To sum up, in the present embodiment, measurement data is accurate, and the preparation before measurement makes side face process time saving and energy saving, mentions
The efficiency of high measurement and measurement it is accurate；Meanwhile, it is capable to which it is subsequent right to carry out according to the positioning to magnetic field abnormal area and record
Detection data is checked, to find out the deficiency of measurement method, to avoid in measurement next time, and then reduces error.
In the present embodiment, Non-contact Magnetic stress mornitoring system and application method are accurately detected in measurand with stress
The hazardous components and position that concentration zones are characterized；In detection process, using self-magnetization phenomenon of the equipment in earth's magnetic field without
Special magnetizing equipment is wanted, is not necessary to carry out the surface of examined workpiece cleaning or other pretreatments, the influence very little of Lift-off effect,
Equipment is light, operation rapid and convenient, high sensitivity, repeatability and good reliability, can quick identified sign concentrated area, be suitable for
The generaI investigation of large area.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of Non-contact Magnetic stress mornitoring system and application method, which comprises the following steps:
S1 carries out preliminary analysis to Awaiting Overhaul pipeline；The pipe arrangement orientation in region to be measured is analyzed, preliminary judgement may occur
The position of defect of pipeline, and record pipe arrangement environment；
S2 clears up path where pipe under test, detects pipeline path by pipeline path searcher, and fixed using GPS
Position system determines path detection zero point；The axis of pipeline is marked, on the ground to make a mark to path；
S3 detects pipeline；Operator holds magnetic stress detection device, and the axis direction of the pipeline marked along S2 is advanced
Detection；Detect simultaneously recording detection data to the magnetic parameter of magnetic flux leakage above pipeline section to be detected using sensor probe；
Wherein, magnetic field abnormal area is positioned and is recorded；
S4 is carried out carrying out data processing and signal is analyzed to recording detection data；Magnetic field stress value on pipeline path combines different
Normal area determines the composite index of each test point along the relationship of conduit axis direction magnetic field distribution density；
S5 determines the pipe section coordinate of magnetic anomaly according to composite index, and analyzes and show that the defect of pipeline at the coordinate is dangerous
Grade, and analysis is made to pipeline overall stress situation；Wherein, corresponding magnetic is determined by experiment according to the pipeline of different situations
The thresholds of field gradient, if detecting that magnetic field value sign reversing and magnetic field gradient variation have been more than thresholds, it can judge at this
There are stress concentration phenomenons for tube body；
S6, the processing of data result；Label need to excavate the position in verification hole and be excavated on pipeline path, in verification hole
Additional tube contacts formula non-destructive testing is carried out with conventional method, according to the actual conditions and composite index and magnetic anomaly in verification hole
Normal grade is compared, and last modification is made to danger classes and diagnostic result, finally submits final diagnosis testing result.
2. Non-contact Magnetic stress mornitoring system according to claim 1 and application method, which is characterized in that non-contact
Correlativity and cable staggered with pipeline, transmission of electricity existing for the pipeline magnetic field signal of measurement and local landforms, buried depth of pipeline
Line, metal object are influenced caused by magnetic-field measurement, before S4, compensate the influence of external interference, to associated magnetic field data into
Row correction.
3. Non-contact Magnetic stress mornitoring system according to claim 1 and application method, which is characterized in that pipeline path
In searcher, using encoder as range sensor, record position when for along pipeline scanning.
4. Non-contact Magnetic stress mornitoring system according to claim 1 and application method, which is characterized in that in S2,
Using the working form or time recording working form for counting long unit, by sensor probe with a distance from 200-300 millimeters of earth's surface
It advances right above pipeline along pipeline, records changes of magnetic field using magnetic field sensor to examine the information for releasing pipeline conditions；Behaviour
Make personnel to advance simultaneously, needs to keep the variation in magnetic field on observation instrument panel；The feature of recording magnetic field exception, and to present position
It is described.
5. Non-contact Magnetic stress mornitoring system according to claim 1 and application method, which is characterized in that in S3,
Magnetic field signal curve and gradient curve are analyzed, so that it is determined that magnetic field abnormal area.
6. Non-contact Magnetic stress mornitoring system according to claim 1 and application method, which is characterized in that different to magnetic field
Normal region carries out excavation verifying, finds out stress collection in visual inspection or the surface using contact magnetic stress detection method pipeline
Middle area or defective locations；Make ultrasonic inspection, thickness measuring, EDDY CURRENT etc. in stress concentration region, weld seam and neighbouring position to lack to determine
Fall into severity.
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Cited By (5)
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| CN110823995A (en) * | 2019-11-27 | 2020-02-21 | 陕西泰诺特检测技术有限公司 | Oxide skin detection method and imaging device |
| CN111307031A (en) * | 2020-03-16 | 2020-06-19 | 西南石油大学 | Buried pipeline safety state monitoring and early warning method |
| CN113218541A (en) * | 2021-05-08 | 2021-08-06 | 西南石油大学 | Stress detection method for large-caliber high-steel-grade mountain pipeline |
| CN114413884A (en) * | 2022-03-29 | 2022-04-29 | 西南民族大学 | Positioning method and device based on magnetic gradiometer array and storage medium |
| CN114544043A (en) * | 2022-01-29 | 2022-05-27 | 中国石油大学(北京) | Multi-steel stress detection device and method |
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