CN109973827A - A kind of submarine pipeline detection device based on isomery field - Google Patents
A kind of submarine pipeline detection device based on isomery field Download PDFInfo
- Publication number
- CN109973827A CN109973827A CN201910249648.5A CN201910249648A CN109973827A CN 109973827 A CN109973827 A CN 109973827A CN 201910249648 A CN201910249648 A CN 201910249648A CN 109973827 A CN109973827 A CN 109973827A
- Authority
- CN
- China
- Prior art keywords
- coil
- detection device
- submarine pipeline
- device based
- permanent magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention belongs to non-destructive testing technology technical fields, disclose a kind of submarine pipeline detection device based on isomery field, it is characterized in that, including yoke, permanent magnet, coil and Hall sensor, the bottom at the yoke both ends picks permanent magnet respectively, and oppositely arranged above and below the magnetic pole of two block permanent magnets, the bottom of two block permanent magnets is respectively fixed with coil, Hall sensor is set to testee upper surface, is electrically connected with leakage magnetic detection device；The invention proposes a kind of novel detection devices, submarine pipeline defect can quickly be detected, driving source is used as using coil and permanent magnet simultaneously, leakage field, vortex and ultrasound detection are carried out simultaneously to testee, to realize the whole detection of pipeline, the complete acquisition of the defective data to the defect and outer wall of inner wall of the pipe is realized.
Description
Technical field
The invention belongs to non-destructive testing technology technical fields, and in particular to a kind of submarine pipeline detection dress based on isomery field
It sets.
Background technique
Oil-gas pipeline is chronically under complex environment and works, and inner and outer walls of pipeline can be due to wearing or corroding generation defect.Mesh
Preceding pipeline is largely made of ferrimagnet, and common detection method is Magnetic Flux Leakage Inspecting or EDDY CURRENT.Wherein leakage field is examined
Survey is widely used in the defects detection of pipeline now, and the magnetic flux distribution of ferrimagnet is utilized to examine in principle
Changes of magnetic field caused by surveying due to defect variation.EDDY CURRENT is commonly available to the outer surface of testee, due to testee
It is ferrimagnet, therefore the skin depth being vortexed is very low, by being vortexed the calculation formula of skin depth it is found that it is much smaller than pipe
Wall thickness, the accuracy gone out for defects detection on the outside of tube wall are very low.Electromagnetic acoustic is a kind of newer lossless detection method,
Advantage be can with testee Poul Dorset Sheep, but be easy by environmental factor interfere.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of submarine pipeline detection device based on isomery field, technical solutions
It is as follows:
A kind of submarine pipeline detection device based on isomery field, which is characterized in that including yoke, permanent magnet, coil and suddenly
Your sensor, the bottom at the yoke both ends pick permanent magnet respectively, oppositely arranged above and below the magnetic pole of two block permanent magnets, and two pieces
The bottom of permanent magnet is respectively fixed with coil, and Hall sensor is set to testee upper surface, is electrically connected with leakage magnetic detection device
It connects.
The magnetic pole area of the permanent magnet is greater than the area coverage of coil.
The coil is the coil scribed based on PCB, and permanent magnet bottom is fixed on by way of in bonding.
The coil is spiral shape, single layer concentric structure.
The coil is copper conductor coils, and outer diameter is 22~28mm, and the line footpath of copper conductor is 0.15~0.25mm, coil
The number of turns is 80~120 circles.
The permanent magnet is cylindrical magnet iron, a diameter of 25~35mm.
Compared with prior art, the beneficial effects of the present invention are:
The invention proposes a kind of novel detection devices, submarine pipeline defect can be quickly detected, using coil and permanent magnetism
Iron is used as driving source simultaneously, carries out leakage field, vortex and ultrasound detection simultaneously to testee, to realize the whole inspection of pipeline
It surveys, realizes the complete acquisition of the defective data to the defect and outer wall of inner wall of the pipe.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic diagram of Magnetic Flux Leakage Inspecting method of the present invention；
Fig. 3 is the schematic diagram of detection method of eddy of the present invention；
Fig. 4 is the schematic diagram of supersonic testing method of the present invention.
Wherein: yoke 1；Permanent magnet 2；Coil 3, testee 4；Hall sensor 5.
Specific embodiment
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
As shown in Figure 1, the present invention provides a kind of submarine pipeline detection device based on isomery field, including yoke 1, permanent magnetism
Iron 2 and coil 3 and Hall sensor 5, the bottom at 1 both ends of yoke pick permanent magnet 2, the magnetic of two block permanent magnets 2 respectively
Extremely oppositely arranged up and down, the bottom of two block permanent magnets 2 is respectively fixed with coil 3, and Hall sensor is set to table on testee
Face is electrically connected with leakage magnetic detection device.
Specifically, leakage magnetic detection device device used in existing Magnetic Flux Leakage Inspecting technology is identical.
The magnetic pole area of the permanent magnet 2 is greater than the area coverage of coil 3, to reach higher ultrasonic transduction efficiency.
The coil 3 is the coil 3 scribed based on PCB, and 2 bottom of permanent magnet is fixed on by way of in bonding.
The coil 3 is spiral shape, single layer concentric structure.
The coil 3 is copper conductor coils, and outer diameter is 22~28mm, and the line footpath of copper conductor is 0.15~0.25mm, line
Enclosing 3 the number of turns is 80~120 circles.
The permanent magnet 2 is cylindrical magnet iron, a diameter of 25~35mm.
Working principle of the present invention is as follows:
1, Magnetic Flux Leakage Inspecting method principle
When permanent magnet 2 is used alone as driving source, working principle is as shown in Figure 2.
Dotted arrow is magnetic flux density line in figure, and after pipeline is magnetized by externally-applied magnetic field, and its structure is continuous, material is equal
Even, internal unstressed effect, and when magnetized spot reaches magnetic saturation state or approximate magnetic saturation state, the then magnetic of externally-applied magnetic field
Sense line can be bound in inside ferrimagnet, and the magnetic induction line inside magnetic permeable material is parallel with the surface of material, at this time
Only a small amount of magnetic induction line is present in the outer surface of material.When test specimen within the scope of magnetized spot there are a defect, according to
Magnetic circuit theory obtains magnetic resistance
Wherein, RmFor magnetic resistance, μ is magnetic conductivity, and S is 4 cross-sectional area of testee, and l is length.
Due to the presence of defect, then sectional area S is reduced, and causes the region magnetic resistance to increase, magnetic induction line will divide again herein
Cloth, and in view of approximate saturation caused by magnetization, therefore compared to area free from defect, it is existing which leakage field will obviously occurs
As.Since the line of magnetic induction is one group of closure not cross curve, the line of magnetic induction can leave in advance material in soon contact deficiency
Expect surface, flow through material outer medium and reenter material internal after bypassing defect, passes through and detect 4 near surface magnetic of testee
Induction, and can detecte out at this with the flux density magnitude comparison at zero defect with the presence or absence of defect.
2, detection method of eddy principle
When coil 3 is used alone as detection driving source, eddy current detection method, testing principle such as Fig. 3 may be implemented
It is shown.
When coil 3 passes to the alternating current I of frequency f and is near pipeline inner tubal wall, one will be generated near coil 3
Alternating magnetic field, and inner surface of pipeline is acted on, vortex field I is induced in the pipe walle, wherein vortex density can be by first calculating
Its curl is asked to calculate after magnetic field strength, magnetic field strength calculates equation
Wherein, μ is magnetic conductivity, and γ is the conductivity of unit length, and H is magnetic field strength.
The vortex of generation will form new alternating magnetic field, and influence former magnetic field, and primary coil 3 is used as detection coil 3, sense simultaneously
Magnetic field is answered to influence voltage and the impedance generation variation of coil 3.When tube wall existing defects, change the Distribution of Magnetic Field and intensity in space,
The voltage change for causing detection coil 3 passes through the defect information of the available conductive surface of the characteristic variations of detection coil 3, tool
Body, the device of 3 characteristic variations of detection coil is identical as device used in existing eddy detection technology.
3, ultrasound detection principle
When coil 3 and permanent magnet 2 are used as driving source simultaneously, electromagnetic acoustic detection, principle such as Fig. 4 institute may be implemented
Show.
Its main transducing process is the bias magnetic field effect that magnetic field is converted to vortex field and is provided by permanent magnet 2, finally
Realize the conversion of sound field.Concrete operating principle: when coil 3 passes to the alternating current I of frequency f and near pipeline inner tubal wall
When, an alternating magnetic field will be generated near coil 3, and act on inner surface of pipeline, induce vortex field I in the pipe walle, this
When coil 3 and permanent magnet 2 collectively form ultrasonic transducer, complete excitation and receive ultrasound process.Excitation process is to realize electricity
Magnetic field sound field conversion process, permanent magnet 2 provide constant bias magnetic field H, alternating current I are passed through in excitation coil 3, and electric current face is close
Degree is J, forms alternating magnetic field H on 4 surface of testeed, alternating magnetic field can be in surface generation vortex field Je,
Je=▽ × H
Wherein, it is a function about coordinate and time that H, which is the magnetic field strength of spatial distribution, and vortex is in magnetic fields
Under can generate Lorentz force Fl
FL=μ Je×H
Surface is generated strain by Lorentz force, forms elastic wave and transmits to direction as shown in Figure 4.Due to leakage field
Tube wall is magnetized to saturation state in detection method, therefore Lorentz force plays a major role to the excitation of elastic wave.According to elasticity
Mechanics, in the uniform material of isotropic, ignoring physical exertion Time Migration of Elastic Wave Equation is
Wherein, G and λ is respectively the elastic constant of material, and u is the displacement vector of particle.
Receive process are then the inverse process of excitation, and reception device of the coil 3 as magnetic field realizes that sound field and electromagnetic field turn
It changes, near elastic wave propagation to permanent magnet 2, elastic wave leads to 4 surface vibration of testee and produces again under magnetic fields
Raw new vortex fieldNew vortex field will generate new magnetic flux densityThe magnetic field is incuded by coil 3 to realize sound field
To the transducing process of final signal.As shown in 4 figures, elastic wave is excited and is passed by 4 inner surface of testee elastic wave direction of transfer
It is handed to tested external surface to reflect, thus signal can obtain the depth information of pipeline, the specific dress for receiving elastic wave
It sets identical as existing supersonic detection device receiving portion.
The present invention can carry out simultaneously leakage field, vortex and ultrasound detection to testee 4.
Wherein Magnetic Flux Leakage Inspecting is not related to stimulus part, and driving source is permanent magnet 2, and reception device is hall sensing
The upper surface of testee is arranged in device 5.
For vortex and ultrasound detection, the present invention includes excitation module and receiving module, excitation module by signal generator,
The big amplifier of power, match circuit and probe coil 3 form.Power amplifier output HIGH voltage pulse excitation coil 3 is popped one's head in, and is made
Surface induction goes out to be vortexed, while generating ultrasonic wave under permanent magnet effect.
The magnetic signal that coil 3 receives is sent into ultrasound detection module and EDDY CURRENT module, the place of two kinds of detection signals
Reason mode is different, and ultrasonic signal needs multistage amplification, and received magnetic signal is amplified foot by the amplifier of difference channel composition
Enough multiples are obtained 4 thickness information of testee and then are obtained tube wall External Defect information by bandpass filtering treatment.Specific implementation
The signal interval twice received for coil 3 is T0, the spread speed of ultrasonic wave in the duct is v, then passes through formula
D=T0·v
Wherein, d is pipe thickness information measured by electromagnetic acoustic detection method.
Eddy current testing signal analysis, obtains tube wall near surface information by mutual inductance, frequency domain and impedance analysis method.
It should be noted that the principle and equipment therefor of above-mentioned three kinds of detection methods belong to the prior art, of the invention is excellent
Place is that the present invention is used as driving source using coil and permanent magnet simultaneously, and leakage field, vortex can be carried out simultaneously to testee 4
And ultrasound detection is realized to realize the whole detection of pipeline to the complete of the defective data of the defect and outer wall of inner wall of the pipe
Acquisition.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair
The present invention is described in detail, and the those of ordinary skill in field is it is understood that still can be to specific embodiment party of the invention
Formula is modified or replaced equivalently, and without departing from any modification of spirit and scope of the invention or equivalent replacement, it should all
Cover in present claims range.
Claims (6)
1. a kind of submarine pipeline detection device based on isomery field, which is characterized in that including yoke, permanent magnet, coil and Hall
Sensor, the bottom at the yoke both ends pick permanent magnet respectively, and oppositely arranged above and below the magnetic pole of two block permanent magnets, two pieces forever
The bottom of magnet is respectively fixed with coil, and Hall sensor is set to testee upper surface, is electrically connected with leakage magnetic detection device.
2. a kind of submarine pipeline detection device based on isomery field according to claim 1, which is characterized in that the permanent magnetism
The magnetic pole area of iron is greater than the area coverage of coil.
3. a kind of submarine pipeline detection device based on isomery field according to claim 1, which is characterized in that the coil
For the coil scribed based on PCB, permanent magnet bottom is fixed on by way of in bonding.
4. a kind of submarine pipeline detection device based on isomery field according to claim 1, which is characterized in that the coil
For spiral shape, single layer concentric structure.
5. a kind of submarine pipeline detection device based on isomery field according to claim 1, which is characterized in that the coil
For copper conductor coils, outer diameter is 22~28mm, and the line footpath of copper conductor is 0.15~0.25mm, and coil turn is 80~120 circles.
6. a kind of submarine pipeline detection device based on isomery field according to claim 1, which is characterized in that the permanent magnetism
Iron is cylindrical magnet iron, a diameter of 25~35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910249648.5A CN109973827A (en) | 2019-03-29 | 2019-03-29 | A kind of submarine pipeline detection device based on isomery field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910249648.5A CN109973827A (en) | 2019-03-29 | 2019-03-29 | A kind of submarine pipeline detection device based on isomery field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109973827A true CN109973827A (en) | 2019-07-05 |
Family
ID=67081667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910249648.5A Pending CN109973827A (en) | 2019-03-29 | 2019-03-29 | A kind of submarine pipeline detection device based on isomery field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109973827A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226277A (en) * | 2017-12-28 | 2018-06-29 | 哈尔滨工业大学 | The outer detection probe of a kind of leakage field, electromagnetic acoustic and vortex composite pipeline |
-
2019
- 2019-03-29 CN CN201910249648.5A patent/CN109973827A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226277A (en) * | 2017-12-28 | 2018-06-29 | 哈尔滨工业大学 | The outer detection probe of a kind of leakage field, electromagnetic acoustic and vortex composite pipeline |
Non-Patent Citations (1)
| Title |
|---|
| 夏纪真: "《工业无损检测技术 超声检测》", 31 January 2017 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102894974B (en) | Magneto-acoustic-electric imaging system and imaging method | |
| CN107064289B (en) | Method, device and system for multi-mode electromagnetic ultrasonic and magnetic leakage detection and sensor | |
| CN109507282A (en) | A kind of pipe surface defect inspection method of electromagnetic acoustic monitoring sensor installation point | |
| KR100561215B1 (en) | Magnetostrictive Transducer for Generating and Sensing Elastic Ultrasonic waves, and Apparatus for Structural Diagnosis Using It | |
| CN102706966B (en) | Horizontal-shearing electromagnetic ultrasonic probe | |
| CN102854365B (en) | Magnetic, acoustic and electric current measuring device | |
| CN109444270A (en) | A kind of electromagnetic acoustic and impulse eddy current compound detection sensor | |
| Rieger et al. | Noncontact reception of ultrasound from soft magnetic mild steel with zero applied bias field EMATs | |
| CN105380645B (en) | A kind of detection method and device of lung magnetic chart | |
| CN108020155A (en) | A kind of dual coil electromagnetic ultrasonic transducer based on Halbach principles | |
| CN103207239B (en) | A kind of integrated adjustable magnetostriction longitudinal wave guide probe | |
| CN109973827A (en) | A kind of submarine pipeline detection device based on isomery field | |
| US7395715B2 (en) | Electromagnetic ultrasound probe | |
| CN114441641B (en) | Longitudinal wave type electromagnetic ultrasonic probe and detection method | |
| CN103217481A (en) | Magnetoacoustic tomography-with-magnetic-induction probe applying magnetostriction | |
| Chen et al. | Oil-tank weld detection using EMAT | |
| CN206223733U (en) | From the magnetic striction wave guide detection means for perceiving operating point | |
| JP3608423B2 (en) | Electromagnetic ultrasonic measurement method and apparatus | |
| Pelkner et al. | MR-based eddy current probe design for hidden defects | |
| Tu et al. | A new magnetic configuration for a fast electromagnetic acoustic transducer applied to online steel pipe wall thickness measurements | |
| Bing | Application of electromagnetic acoustic in steel pipe inspection | |
| CN114858106B (en) | Longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe | |
| RU2243550C1 (en) | Electromagnetic-acoustic transducer | |
| Yu et al. | Defect Detection Method of Small-Diameter Ferromagnetism Pipeline Based on Uniform Electromagnetic Field | |
| CN118258898A (en) | Electromagnetic acoustic sensor for integrated surface wave polarization measurement and polarization measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190705 |