CN110043810A - Detection method, the packaging method of sensor and sensor of defect of pipeline - Google Patents
Detection method, the packaging method of sensor and sensor of defect of pipeline Download PDFInfo
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- CN110043810A CN110043810A CN201910435402.7A CN201910435402A CN110043810A CN 110043810 A CN110043810 A CN 110043810A CN 201910435402 A CN201910435402 A CN 201910435402A CN 110043810 A CN110043810 A CN 110043810A
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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
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention provides a kind of detection method of defect of pipeline, the packaging method of sensor and sensor.The detection method includes: to be arranged in first sensor and second sensor on the corresponding position of pipeline along preset direction, and the region between the first sensor and second sensor of the pipeline is effective detection zone；Pumping signal is provided for the first sensor, so that the first sensor generates ultrasonic signal, the ultrasonic signal can be propagated along the preset direction；It detects whether the second sensor receives the ultrasonic signal, obtains testing result；It is determined in effective detection zone according to the testing result with the presence or absence of defect.The detection method realizes effective detection defect of pipeline by ultrasound examination defect.
Description
Technical field
The present invention relates to detection technique fields, in particular to the detection method of defect of pipeline, sensor and sensor
Packaging method.
Background technique
For pipeline as a kind of means of transport, working environment is more severe, is easy to happen corrosion and fatigue and destroys or make pipe
Latent defect is expanded into crackle inside road, and the leakage of toxic and harmful gas and combustion gas oil pipeline all will normally give birth to the mankind
The living and security of the lives and property causes huge threat.It therefore, is critically important to trommel, defect and crack detection.
Currently, common defect inspection method has EDDY CURRENT, Magnetic Flux Leakage Inspecting etc..In common detection method, such as whirlpool
Coil does not need directly to contact with measured object when stream detection, is not suitable for complex-shaped part, testing result is also susceptible to
The interference of material itself and other factors.
As it can be seen that common defect inspection method is not suitable for the defects detection of pipeline, defect of pipeline cannot be effectively detected.
Summary of the invention
The application is to provide a kind of detection method of defect of pipeline, the packaging method of sensor and sensor, to solve
The technical issues of defect of pipeline cannot effectively be detected.
Embodiments herein is accomplished in that
In a first aspect, the present invention provides a kind of detection method of defect of pipeline, which comprises
First sensor and second sensor are arranged on the corresponding position of pipeline along preset direction, the position of the pipeline
Region between the first sensor and second sensor is effective detection zone；Excitation is provided for the first sensor
Signal, so that the first sensor generates ultrasonic signal, the ultrasonic signal can be propagated along the preset direction；Inspection
It surveys whether the second sensor receives the ultrasonic signal, obtains testing result；Institute is determined according to the testing result
It states in effective detection zone with the presence or absence of defect.
Further, the first sensor and the second sensor include shell and are arranged intracorporal in the shell
First sensor and second sensor are being arranged in the corresponding position of pipeline along preset direction by PCB coil and multiple permanent magnets
Before upper, the method also includes:
The multiple permanent magnet is arranged according to the preset direction above the PCB coil；Test the PCB coil with
The lift off for needing to meet between pipe surface；According to the lift off by the PCB coil and the multiple permanent magnet
Be encapsulated in the shell and obtain the first sensor and the second sensor so that the PCB coil be encapsulated in it is described
Preset space after in shell is less than the lift off, wherein the preset space characterizes the PCB coil apart from the shell
The distance close to the pipe surface end of body.
Further, testing the lift off for needing to meet between PCB coil and pipe surface includes:
Change the distance between the PCB coil and pipe surface；Test the signal for the signal that the PCB coil receives
Intensity and signal-to-noise ratio；The lift off is determined according to the signal strength and the signal-to-noise ratio.
Further, the PCB coil and the multiple permanent magnet are encapsulated in by the shell according to the lift off
It inside obtains the first sensor and the second sensor includes:
The PCB coil and the multiple permanent magnet are encapsulated in shell by encapsulation medium；Wherein, close to the pipe
The encapsulation shape of road endmost surface is matched with the shape of the pipe surface, so that the preset space is less than the lift off.
Further, before being encapsulated in the PCB coil and the multiple permanent magnet in shell by encapsulation medium,
The method also includes:
One layer of wear-resistant material is pasted on the PCB coil surface, to guarantee institute after the PCB coil is encapsulated in the shell
Preset space is stated less than the lift off.
Further, first sensor and second sensor are arranged on the corresponding position of pipeline along preset direction and are wrapped
It includes:
First sensor and second sensor along the axial direction of the pipeline or are arranged circumferentially in the corresponding position of pipeline
On.
Further, it is determined in effective detection zone according to the testing result and includes: with the presence or absence of defect
If ultrasonic signal described in the testing result is decayed, determine in effective detection zone in the presence of scarce
It falls into, the size of the attenuation degree characterization defect of the ultrasonic signal.
Second aspect, the present invention also provides a kind of sensors, comprising: shell and setting are in the intracorporal PCB coil of the shell
With multiple permanent magnets；The multiple permanent magnet is arranged in the PCB coil according to preset direction；The PCB coil is encapsulated in
The intracorporal preset space of shell is less than the lift off of prediction, and the preset space characterizes the PCB coil apart from the shell
The distance of the close pipe under test endmost surface of body.
The third aspect, the present invention also provides a kind of packaging method of sensor, the sensor includes that shell and setting exist
The intracorporal PCB coil of shell and multiple permanent magnets, which comprises
The multiple permanent magnet is arranged according to preset direction above the PCB coil；Test the PCB coil with it is to be measured
The lift off for needing to meet between pipe surface；According to the lift off by the PCB coil and the multiple permanent magnet
It is encapsulated in the shell and obtains the sensor, so that the preset space after the PCB coil is encapsulated in the shell is small
In the lift off, wherein the preset space characterizes the PCB coil apart from the shell close to the pipe surface
The distance at end.
Further, the PCB coil and the multiple permanent magnet are encapsulated in by the shell according to the lift off
Inside obtaining the sensor includes:
The PCB coil and the multiple permanent magnet are encapsulated in shell by encapsulation medium；Wherein, close to the pipe
The encapsulation shape of road endmost surface is matched with the shape of the pipe surface, so that the preset space is less than the lift off.
The detection method of defect of pipeline provided by the invention, by the way that the first sensor and second sensing is arranged
Device, detects whether the second sensor receives ultrasonic signal, is determined in effective detection zone according to testing result
With the presence or absence of defect.The detection zone for determining the pipeline by ultrasonic signal effectively detects pipeline with the presence or absence of defect
Defect.
It is small in the intracorporal preset space of the shell to be encapsulated in the intracorporal PCB coil of the shell for sensor provided by the invention
In the lift off of prediction, meet the lift off requirement of the sensor, is lacked so that the sensor be made to can be used in pipeline
Fall into detection.
The packaging method of sensor provided by the invention, by testing lift off, according to the lift off
Sensor is effectively encapsulated, so as to meet requirement of the sensor for pipeline defect detection.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, the embodiment of the present invention is cited below particularly, and match
Appended attached drawing is closed, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is sensor structure schematic diagram provided in an embodiment of the present invention；
Fig. 2 is sensor internal structural schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the packaging method flow chart of sensor provided in an embodiment of the present invention；
Fig. 4 is lift off test case figure provided in an embodiment of the present invention；
Fig. 5 is the sensor structure schematic diagram that encapsulation provided in an embodiment of the present invention is completed；
Fig. 6 is the detection method flow chart of defect of pipeline provided in an embodiment of the present invention；
Fig. 7 is axial sensor arrangement exemplary diagram provided in an embodiment of the present invention；
Fig. 8 is circumferential sensor arrangement exemplary diagram provided in an embodiment of the present invention；
Fig. 9 is fixed rack structure schematic diagram provided in an embodiment of the present invention；
Figure 10 is axial testing result exemplary diagram provided in an embodiment of the present invention；
Figure 11 is circumferential testing result exemplary diagram provided in an embodiment of the present invention；
Figure 12 is existing defects testing result exemplary diagram provided in an embodiment of the present invention.
Icon: 100- sensor；101- shell；102-PCB coil；The more a permanent magnets of 103-；500- fixed frame；501- is solid
Determine frame ontology；502- adjusting nut；503- idler wheel.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " in ", "upper", "lower", "horizontal", "inner", "outside" etc. refer to
The orientation or positional relationship shown is to be based on the orientation or positional relationship shown in the drawings or when invention product use usually puts
The orientation or positional relationship put, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.In addition, term " first ", " second " etc. are only used for distinguishing description, it is not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " setting ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected.It can
To be mechanical connection, it is also possible to be electrically connected.It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the present invention.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Fig. 1 is please referred to, is a kind of sensor 100 provided in an embodiment of the present invention, the sensor 100 is arranged in pipeline and waits for
When surveying on surface, it can be used for the detection of defect of pipeline.The sensor 100 includes shell 101, PCB (Printed
Circuit Board, printed circuit board) coil 102, multiple permanent magnets 103.The PCB coil 202 and the multiple permanent magnet
103 are arranged in the shell 101.The PCB coil 102 is encapsulated in the preset space in the shell 101 and is less than prediction
Lift off, the preset space characterize the close pipe surface end of the PCB coil 102 apart from the shell 101
Distance.
It referring to figure 2., is a kind of internal structure chart of the sensor 100, it can be seen that the PCB coil 102 can be with
Using racetrack-type rotor coil, it is also possible to the coil of other shapes.The production of the corresponding PCB coil 102, can be using double-deck soft
The form of plate, line width can be 0.2mm.When working sensor, need to apply in coil the alternating current of high frequency.For described more
A permanent magnet 103 can use different spread patterns, biserial periodic arrangement as shown in Figure 2: adjacent magnets the same face
Polarity it is opposite.The straight line portion width of the PCB coil 102 can match with the length of the permanent magnet, to described
After PCB coil 102 applies pumping signal, the ultrasonic wave motivated is propagated along the direction that the multiple permanent magnet 103 arranges.
For the shell 101, the shell 101 can be the stainless steel of nonferromagnetic, by 102 He of PCB coil
The multiple permanent magnet 103 is encapsulated in the shell 101.In order to allow the sensor 100 to carry out ultrasonic signal
Excitation and reception, for the detection of defect of pipeline, distance of the PCB coil apart from pipe under test surface is to require
, therefore the sensor 100 is specifically encapsulated, to realize to the fast of different-diameter pipeline either internally or externally defect
Fast effective detection.
It referring to figure 3., is a kind of packaging method of sensor provided by the invention, the packaging method is applied to above-mentioned institute
The encapsulation for the sensor 100 stated, the packaging method include:
Step 301: arranging the multiple permanent magnet according to preset direction above the PCB coil.
Step 302: testing the lift off for needing to meet between the PCB coil and pipe under test surface.
Step 303: the PCB coil and the multiple permanent magnet being encapsulated in the shell according to the lift off
Obtain the sensor.So that the preset space after the PCB coil is encapsulated in the shell is less than the lift off,
In, the preset space characterizes distance close to the pipe surface end of the PCB coil apart from the shell.
The packaging method is described in detail below.
In step 301, it needs the multiple permanent magnet 103 being arranged in the PCB coil 102 according to preset direction
On.For the preset direction, the direction of propagation for the excitation ultrasonic wave that the PCB coil 102 generates is characterized.
In a step 102, need to test the lift-off that needs to meet between the PCB coil 102 and surface pipeline to be measured away from
From.Test for the lift off, be in order to guarantee that the sensor 100 is arranged on the pipe surface after, it is described
Sensor 100 can receive the ultrasonic signal by the pipe transmmision, could detect the pipeline with the presence or absence of defect.
And for specific test process, the embodiment of the present invention provides a kind of optional embodiment, therefore the step
102 include: to change the distance between the PCB coil and pipe surface；Test the signal for the signal that the PCB coil receives
Intensity and signal-to-noise ratio；The lift off is determined according to the signal strength and the signal-to-noise ratio.
In specific implement, before changing distance, two groups can be placed described in PCB coil 102 and it is the multiple forever
Magnet 103, one group is used as excitation group, and one group is used as reception group.Then apply pumping signal for the pumping signal group, change two
The distance between group and pipe surface, while testing the signal strength and noise of the signal in PCB coil 102 described in this two groups
Than.As shown in figure 4, for obtained test result instance graph, it can be seen that with the increase of the lift off of distance, signal is strong
Degree and signal-to-noise ratio reduce, and when lift off is 1mm, signal can also be just received, thus may determine that described
Lift off is 1mm.That is when lift off is greater than 1mm, signal cannot be received in the PCB coil 102.
After obtaining the lift off, step 103 can be executed, is packaged according to the lift off, to obtain
It can be ultimately used for the sensor 100 of detection defect.During encapsulation, because the PCB coil 102 is in the shell
One section of preset space, that is, the close pipe surface of the PCB coil 102 apart from the shell 101 are had in body 101
The distance at end, it is all that the preset space to be made to be less than the lift off when packaged, the sensor 100 can just arranged
After on the pipeline, signal can be still received.
For guaranteeing the embodiment of the lift off, before executing step 103, the packaging method can also be wrapped
It includes: one layer of wear-resistant material is pasted on 102 surface of PCB coil, to guarantee that the PCB coil 102 is encapsulated in the shell 101
The preset space is less than the lift off afterwards.
For the wear-resistant material, the thickness of the wear-resistant material should be small as far as possible, and the wear-resistant material can guarantee
The PCB coil 102 is protected while lift off.
When executing step 303, step 303 may include: to pass through the PCB coil 102 and the multiple permanent magnet 103
Encapsulation medium is encapsulated in shell；Wherein, close to the encapsulation shape at the pipe surface end and the shape of the pipe surface
Match, so that the preset space is less than the lift off.
Referring to figure 5., the exemplary diagram for the sensor completed for encapsulation.Wherein, the encapsulation medium can be epoxy resin
Or the PCB coil 102 for posting wear-resistant material is put into the shell in specific encapsulation by other resinae encapsulation mediums
It is potted in body 101, notices that the wear-resistant material finally will be in the shell 101 close to the pipe surface end.If
The sensor 100 that encapsulation is completed is detection for pipeline external, and the encapsulation shape close to the pipe surface end can be with
It is directly plane；If the sensor 100 that encapsulation is completed is for detection inside pipeline, close to the pipe surface end
Encapsulation shape needs for curved surface, and the subsequent corrosion at the end and internal diameter of the pipeline detected are adapted.By taking curved surface as an example, encapsulating
Specific implementation process may is that be made to be bent to fix accordingly to be put into the shell 101 to be formed after curved surface by PCB soft board, complete
At the shell 101 close to the closure at the pipe surface end, then it is potted with epoxy resin, after epoxy resin cure
Remove bottom surface closure.
The packaging method of sensor provided by the invention, by testing lift off, according to the lift off
Sensor is effectively encapsulated, so as to meet requirement of the sensor for pipeline defect detection.
Fig. 6 is please referred to, is a kind of detection method of defect of pipeline provided by the invention, the detection method utilizes above-mentioned envelope
The sensor 100 installed detects defect of pipeline, and the detection method includes:
Step 401: first sensor and second sensor are arranged on the corresponding position of pipeline along preset direction.Its
In, the region between the first sensor and second sensor of the pipeline is effective detection zone.
Step 402: pumping signal is provided for the first sensor, so that the first sensor generates ultrasonic wave letter
Number, the ultrasonic signal can be propagated along the preset direction.
Step 403: detecting whether the second sensor receives the ultrasonic signal, obtain testing result.
Step 404: being determined in effective detection zone according to the testing result with the presence or absence of defect.
Whether the detection method detects the second sensor by the first sensor and the second sensor
Ultrasonic signal is received, is determined in effective detection zone according to testing result with the presence or absence of defect.Believed by ultrasonic wave
It number determines that the detection zone of the pipeline whether there is defect, effectively detects defect of pipeline.
The implementing procedure of step 401- step 404 is described in detail below.
In the detection method, for the ultrasonic signal that the first sensor generates, carried out on the pipeline
When propagation, referred to as electromagnetical ultrasonic SH wave (horizonntlly polarized S waves).The pipeline is equivalent to as a kind of solid propagation medium, in order to
It realizes the excitation and reception of electromagnetical ultrasonic SH wave in pipeline, to meet the coherent detection of the defect of pipeline, is passed for described first
Sensor and the second sensor need to meet the condition for being used for pipe detection.
The sensor 100 can be used as the first sensor and the second sensor, be arranged in the pipeline pair
On the position answered, it is to be understood that the first sensor and the second sensor itself are identical, an only use
In excitation ultrasonic signal, one is used for received ultrasonic signal.
It should be noted that the packaging method of the sensor 100 can individually be implemented, it also may include in the detection
In method, completed before executing step 401.
The step 401 may include: the axial direction or circumferential direction by first sensor and second sensor along the pipeline
It is arranged on the corresponding position of pipeline.
Please refer to Fig. 7 and Fig. 8, respectively the arrangement exemplary diagram of axial and circumferential.The pipeline is located at described the
Region between one sensor and second sensor is effective detection zone.For effective detection zone, can set respectively
It sets multiple groups first sensor and second sensor forms multiple effective detection zones, being detected in multiple effective detection zones respectively is
No existing defects.The first sensor and the second sensor can also be moved, makes effective detection zone with biography
The movement of sensor and correspond to change.Under this embodiment of movable sensor, by the first sensor and described second
Sensor arrangement can be that the first sensor and second sensor setting can at corresponding position on the pipeline
Mobile fixed frame.
Fig. 9 is please referred to, the embodiment of the present invention provides a kind of optional fixed frame 500, and the fixed frame 500 includes fixed frame
Ontology 501, adjusting nut 502 and idler wheel 503.The sensor 200 is fixed on the fixed frame ontology 501, the idler wheel
503 while supporting entire fixed frame ontology 501, can be realized the sensor 100 along duct wall according to detection demand
It is mobile；The adjusting nut 502 is thick according to tested surface for adjusting the distance between the sensor 100 and measured surface
The difference of rugosity keeps lesser gap as far as possible, while can make pipeline of the sensor 100 suitable for different-diameter.It needs
It should be noted that when the sensor 100 to be fixed on the fixed frame 500, according to the thickness of wear-resistant material layer when encapsulation
Degree should ensure that the sensor 100 and the gap on tested pipeline surface subtract the wear-resistant material layer no more than lift off
Thickness value, such as lift off value are 1, and the wear-resistant material layer is 0.2mm, then should ensure that the sensor 100 and be tested
The gap of pipe surface is no more than 0.8mm.
After executing the step 401, step 402 can be executed, pumping signal is provided for the first sensor, so that described
First sensor generates ultrasonic signal, and the ultrasonic signal can be propagated along the preset direction.
Wherein, the pumping signal can be with high-frequency alternating current, the width of the frequency of the high-frequency alternating current and the permanent magnet
Degree corresponds to, and under normal circumstances, the width of the permanent magnet is excitation ultrasonic wave.For the detection of pipeline, when driving frequency is
When 500kHZ, the width of selected permanent magnet is 3mm.
After providing pumping signal, the first sensor generates ultrasonic signal, and the ultrasonic signal is described in
Preset direction is propagated, and can be executed step 403 at this time: be detected whether the second sensor receives the ultrasonic signal,
Obtain testing result.
Then it executes step 404: being determined in effective detection zone according to the testing result with the presence or absence of defect.
Figure 10 and Figure 11 are please referred to, is two kinds of testing results provided in an embodiment of the present invention, both testing results difference
For the testing result of axial and circumferential, it can be seen that the signal received in the second sensor is relatively good, has described in determination
Imitate zero defect in detection zone.
Figure 12 is please referred to, for another testing result provided in an embodiment of the present invention, in this testing result, described the
Two sensors can receive ultrasonic signal, but the ultrasonic signal is decayed, and determine effective detection zone
Interior existing defects, and the size of the attenuation degree characterization defect of the ultrasonic signal.It is understood that effective detection
Existing defect is bigger in region, and the attenuation degree of the ultrasonic signal is bigger.
It therefore,, need to be according to institute if having detected ultrasonic signal in the second sensor for the testing result
It states ultrasonic signal to be judged, if ultrasonic signal is undamped, determines zero defect in effective detection zone；If super
Acoustic signals are decayed, existing defects in effective detection zone, and the attenuation degree characterization of the ultrasonic signal lacks
Sunken size.In addition, if ultrasonic signal is not detected in the second sensor, or determine effective detection zone
Interior existing defects, because the attenuation degree of the ultrasonic signal is bigger, or even disappears in the case where defect compares serious situation
It loses, so being also judged as existing defects, and defect is bigger when ultrasonic signal is not detected.
The detection method provided by the invention detects institute by the way that the first sensor and the second sensor is arranged
It states whether second sensor receives ultrasonic signal, is determined in effective detection zone according to testing result with the presence or absence of scarce
It falls into.The detection zone for determining the pipeline by ultrasonic signal effectively detects defect of pipeline with the presence or absence of defect.
In embodiment provided herein, it should be understood that disclosed device and method, it can also be by other
Mode realize.The apparatus embodiments described above are merely exemplary, for example, the flow chart and block diagram in attached drawing are shown
Device, the architectural framework in the cards of method and computer program product, function of multiple embodiments according to the present invention
And operation.In this regard, each box in flowchart or block diagram can represent one of a module, section or code
Point, a part of the module, section or code includes one or more for implementing the specified logical function executable
Instruction.It should also be noted that function marked in the box can also be attached to be different from some implementations as replacement
The sequence marked in figure occurs.For example, two continuous boxes can actually be basically executed in parallel, they sometimes may be used
To execute in the opposite order, this depends on the function involved.It is also noted that each of block diagram and or flow chart
The combination of box in box and block diagram and or flow chart can be based on the defined function of execution or the dedicated of movement
The system of hardware is realized, or can be realized using a combination of dedicated hardware and computer instructions.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of detection method of defect of pipeline characterized by comprising
First sensor and second sensor are arranged on the corresponding position of pipeline along preset direction, the pipeline is located at institute
Stating the region between first sensor and second sensor is effective detection zone；
Pumping signal is provided for the first sensor, so that the first sensor generates ultrasonic signal, the ultrasonic wave
Signal can be propagated along the preset direction；
It detects whether the second sensor receives the ultrasonic signal, obtains testing result；
It is determined in effective detection zone according to the testing result with the presence or absence of defect.
2. detection method according to claim 1, which is characterized in that the first sensor and the second sensor are equal
Including shell and setting in the intracorporal PCB coil of the shell and multiple permanent magnets, by first sensor and second sensor edge
Before preset direction is arranged on the corresponding position of pipeline, the method also includes:
The multiple permanent magnet is arranged according to the preset direction above the PCB coil；
Test the lift off for needing to meet between the PCB coil and pipe surface；
The PCB coil and the multiple permanent magnet are encapsulated in the shell according to the lift off and obtain described first
Sensor and the second sensor, so that the preset space after the PCB coil is encapsulated in the shell is less than described mention
Separation from, wherein the preset space characterize the PCB coil apart from the shell close to the pipe surface end away from
From.
3. according to the method described in claim 2, it is characterized in that, needing to meet between test PCB coil and pipe surface
Lift off includes:
Change the distance between the PCB coil and pipe surface；
Test the signal strength and signal-to-noise ratio of the signal that the PCB coil receives；
The lift off is determined according to the signal strength and the signal-to-noise ratio.
4. detection method according to claim 2, which is characterized in that according to the lift off by the PCB coil and
The multiple permanent magnet, which is encapsulated in the shell, obtains the first sensor and the second sensor includes:
The PCB coil and the multiple permanent magnet are encapsulated in shell by encapsulation medium；
Wherein, matched close to the encapsulation shape at the pipe surface end with the shape of the pipe surface so that it is described reserve away from
From less than the lift off.
5. according to the method described in claim 4, it is characterized in that, passing through by the PCB coil and the multiple permanent magnet
Before encapsulation medium is encapsulated in shell, the method also includes:
One layer of wear-resistant material is pasted on the PCB coil surface, to guarantee that the PCB coil is described pre- after being encapsulated in the shell
Distance is stayed to be less than the lift off.
6. detection method according to claim 1, which is characterized in that by first sensor and second sensor along default side
Include: to being arranged on the corresponding position of pipeline
First sensor and second sensor along the axial direction of the pipeline or are arranged circumferentially on the corresponding position of pipeline.
7. detection method according to claim 1, which is characterized in that determine effective detection according to the testing result
Include: with the presence or absence of defect in region
If ultrasonic signal described in the testing result is decayed, existing defects in effective detection zone, institute are determined
State the size of the attenuation degree characterization defect of ultrasonic signal.
8. a kind of sensor characterized by comprising shell and setting are in the intracorporal PCB coil of the shell and multiple permanent magnets；
The multiple permanent magnet is arranged in the PCB coil according to preset direction；It is intracorporal pre- that the PCB coil is encapsulated in the shell
Distance is stayed to be less than the lift off of prediction, the preset space characterizes the PCB coil apart from the shell close to test tube
The distance of road endmost surface.
9. a kind of packaging method of sensor, which is characterized in that the sensor includes shell and is arranged intracorporal in the shell
PCB coil and multiple permanent magnets, which comprises
The multiple permanent magnet is arranged according to preset direction above the PCB coil；
Test the lift off for needing to meet between the PCB coil and pipe under test surface；
The PCB coil and the multiple permanent magnet are encapsulated in the shell according to the lift off and obtain the sensing
Device, so that the preset space after the PCB coil is encapsulated in the shell is less than the lift off, wherein described reserved
Distance characterizes distance close to the pipe surface end of the PCB coil apart from the shell.
10. according to the method described in claim 9, it is characterized in that, according to the lift off by the PCB coil and described
Multiple permanent magnets, which are encapsulated in the shell, to be obtained the sensor and includes:
The PCB coil and the multiple permanent magnet are encapsulated in shell by encapsulation medium；
Wherein, matched close to the encapsulation shape at the pipe surface end with the shape of the pipe surface so that it is described reserve away from
From less than the lift off.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066272A (en) * | 2020-09-17 | 2020-12-11 | 昆明理工大学 | Gas pipeline leakage detection device and detection method based on infrasonic waves |
| CN117233263A (en) * | 2023-11-15 | 2023-12-15 | 中北大学 | Narrow-sound-beam electromagnetic ultrasonic sensor and device for detecting defects in axial direction of pipeline |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358688A (en) * | 2008-09-12 | 2009-02-04 | 大庆石油学院 | Magnetic leakage detector out of diameter-variable pipe driven by DC generator |
| CN202305485U (en) * | 2011-10-24 | 2012-07-04 | 南通天华和睿科技创业有限公司 | Electromagnetic ultrasonic detection probe |
| CN102590326A (en) * | 2011-10-31 | 2012-07-18 | 北京理工大学 | Magnetic memory/magnetic leakage integrated multi-probe detection device for tube and shaft type parts |
| CN103292160A (en) * | 2013-06-27 | 2013-09-11 | 陕西师范大学 | Ultrasonic detection device and method for pipeline leakage |
| CN105806429A (en) * | 2016-04-20 | 2016-07-27 | 哈尔滨圣昌科技开发有限公司 | Pipeline leak and pipe burst detection method of ultrasonic water meter |
| CN106694346A (en) * | 2016-12-28 | 2017-05-24 | 南京航空航天大学 | Low-noise transmitting and receiving integrated electromagnetic acoustic transducer and working method thereof |
| CN107923683A (en) * | 2015-11-11 | 2018-04-17 | 株式会社难波 | Refrigerant leakage detecting device in kind of refrigeration cycle |
| CN108088907A (en) * | 2017-12-14 | 2018-05-29 | 哈尔滨零声科技有限公司 | A kind of high temperature pipe hurt on-line monitoring system based on electromagnetic acoustic |
| CN208721620U (en) * | 2018-08-27 | 2019-04-09 | 中南大学 | A kind of electromagnetic acoustic shear wave transducer resistant to high temperatures, wear-resisting |
-
2019
- 2019-05-23 CN CN201910435402.7A patent/CN110043810A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358688A (en) * | 2008-09-12 | 2009-02-04 | 大庆石油学院 | Magnetic leakage detector out of diameter-variable pipe driven by DC generator |
| CN202305485U (en) * | 2011-10-24 | 2012-07-04 | 南通天华和睿科技创业有限公司 | Electromagnetic ultrasonic detection probe |
| CN102590326A (en) * | 2011-10-31 | 2012-07-18 | 北京理工大学 | Magnetic memory/magnetic leakage integrated multi-probe detection device for tube and shaft type parts |
| CN103292160A (en) * | 2013-06-27 | 2013-09-11 | 陕西师范大学 | Ultrasonic detection device and method for pipeline leakage |
| CN107923683A (en) * | 2015-11-11 | 2018-04-17 | 株式会社难波 | Refrigerant leakage detecting device in kind of refrigeration cycle |
| CN105806429A (en) * | 2016-04-20 | 2016-07-27 | 哈尔滨圣昌科技开发有限公司 | Pipeline leak and pipe burst detection method of ultrasonic water meter |
| CN106694346A (en) * | 2016-12-28 | 2017-05-24 | 南京航空航天大学 | Low-noise transmitting and receiving integrated electromagnetic acoustic transducer and working method thereof |
| CN108088907A (en) * | 2017-12-14 | 2018-05-29 | 哈尔滨零声科技有限公司 | A kind of high temperature pipe hurt on-line monitoring system based on electromagnetic acoustic |
| CN208721620U (en) * | 2018-08-27 | 2019-04-09 | 中南大学 | A kind of electromagnetic acoustic shear wave transducer resistant to high temperatures, wear-resisting |
Non-Patent Citations (3)
| Title |
|---|
| 何健鹏，等: "基于宽频兰姆波的钢板缺陷检测", 《仪表技术与传感器》 * |
| 刘冉，武新军: "基于洛伦兹力机理的电磁超声周向导波传感器研制", 《传感器与微***》 * |
| 陈建伟，等: "An Electromagnetic Ultrasonic SH Wave", 《声学与振动》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066272A (en) * | 2020-09-17 | 2020-12-11 | 昆明理工大学 | Gas pipeline leakage detection device and detection method based on infrasonic waves |
| CN117233263A (en) * | 2023-11-15 | 2023-12-15 | 中北大学 | Narrow-sound-beam electromagnetic ultrasonic sensor and device for detecting defects in axial direction of pipeline |
| CN117233263B (en) * | 2023-11-15 | 2024-02-06 | 中北大学 | Narrow-sound-beam electromagnetic ultrasonic sensor and device for detecting defects in axial direction of pipeline |
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