CN206489114U - The sensor and system of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting - Google Patents
The sensor and system of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting Download PDFInfo
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- CN206489114U CN206489114U CN201720068030.5U CN201720068030U CN206489114U CN 206489114 U CN206489114 U CN 206489114U CN 201720068030 U CN201720068030 U CN 201720068030U CN 206489114 U CN206489114 U CN 206489114U
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Abstract
The utility model discloses the sensor and system of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting.Wherein, the sensor includes：U-shaped yoke, the material for magnetizing object to be measured, and produce magnetic field signal in the inside of object to be measured；Leakage field receiving unit, positioned at the medium position of U-shaped yoke, for detecting that the outside of object to be measured whether there is magnetic field signal；First electromagnetic acoustic coil, below the N poles of U-shaped yoke；Second electromagnetic acoustic coil, below the S poles of U-shaped yoke.The utility model, which solves prior art, to be realized using multiple sensors of discrete and causes that system complexity is high, ineffective technical problem to ferromagnetic metal material burn into face crack and internal injury detection.
Description
Technical field
The utility model is related to technical field of industrial nondestructive inspection, in particular to a kind of type multimode electromagnetic ultrasound with
The sensor and system of Magnetic Flux Leakage Inspecting.
Background technology
In this area, Non-Destructive Testing is the essential link of industrial development, and Non-Destructive Testing can not damaged or not
On the premise of influenceing detected object performance, the defect or inhomogeneities of detection measurand surface or inside.
Generally, during Non-Destructive Testing, the Magnetic Flux Leakage Inspecting technology and electromagnetic acoustic detection technique that mainly use (including：
Ultrasonic bulk wave detection, Guided waves and rayleigh waves inspection), wherein, Magnetic Flux Leakage Inspecting technology can use Magnetic Flux Leakage Inspecting technology for detection
The corrosivity monitor of ferrimagnet (for example, steel plate or pipeline)；Electromagnetic acoustic detection technique is by producing ultrasonic bulk wave, surface
Ripple and supersonic guide-wave to carry out Non-Destructive Testing to measurand, with without abrasive material surface, without couplant, noncontact inspection
The many merits such as survey, are particularly suitable for use in automatic ultrasonic testing equipment.
But, due to always detecting goal tasks, it is necessary to detect tested based on multiple in actual engineering Non-Destructive Testing
The number of drawbacks of object, acquisition defect information as much as possible, in addition it is also necessary to rapidly and efficiently.For example, large-scale storage tank wallboard and bottom plate
Detection, not only need carry out thickness measuring realize Corrosion monitoring, in addition it is also necessary to detect crackle, at the same be also desirable that differentiation defect be present in by
The inner or outer side of object is surveyed, fast checking defect area position is additionally expected to have, it is then accurate again to detect the efficient of defect
Inspection policies.To realize that above-mentioned detection target generally requires a variety of detection skills such as leakage field, ultrasonic bulk wave, surface wave, supersonic guide-wave
Art is used in combination.
And the sensor that prior art is used to carry out the detections such as leakage field, ultrasonic bulk wave, surface wave, supersonic guide-wave is all independent
Sensor, if to realize above-mentioned detection target, generally require a variety of instrument such as leakage field, ultrasonic bulk wave, surface wave, supersonic guide-wave
Device and sensor are common or merge using carrying out perform detection.Measurand is entered using multiple independent sensors using existing
The scheme of row detection, adds the complexity and cost of detecting system, and detection efficiency is not also high.
Realized for above-mentioned prior art using multiple sensors of discrete and ferromagnetic metal material burn into surface is split
The problem of line and internal injury detection cause high system complexity, operating efficiency, not yet proposes effective solution at present.
Utility model content
The utility model embodiment provides the sensor and system of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting, with
Prior art is at least solved to realize to ferromagnetic metal material burn into face crack and inside using multiple sensors of discrete
Damage check causes that system complexity is high, ineffective technical problem.
According to the one side of the utility model embodiment, there is provided the biography of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting
Sensor, including：U-shaped yoke, the material for magnetizing object to be measured, and produce magnetic field signal in the inside of object to be measured；Leakage field
Receiving unit, positioned at the medium position of U-shaped yoke, for detecting that the outside of object to be measured whether there is magnetic field signal；First electricity
Magnetic ultrasound coil, below the N poles of U-shaped yoke, is used in combination, for producing or receiving as follows with the N poles lower end of U-shaped yoke
Any one or more detection ripple：Ultrasonic bulk wave, supersonic guide-wave and surface wave；Second electromagnetic acoustic coil, positioned at U-shaped yoke
Below S poles, it is used in combination with the S poles lower end of U-shaped yoke, for producing or receiving any one or more following detection ripple：It is super
Acoustic bulk wave, supersonic guide-wave and surface wave.
According to the other side of the utility model embodiment, there is provided a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting
System, including：The sensor of above-mentioned type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting；Signal generator, for producing to the first electromagnetism
The pumping signal of ultrasonic coil and the second electromagnetic acoustic coil；Power amplifier, for being amplified to pumping signal.
In the utility model embodiment, there is provided one kind by the way of electromagnetic ultrasonic wave and the detection of leakage field integral type
The integral type sensing being made up of U-shaped yoke, leakage field receiving unit, the first electromagnetic acoustic coil and the second electromagnetic acoustic coil
Device, including：U-shaped yoke, the material for magnetizing object to be measured, and produce magnetic field signal in the inside of object to be measured；Leakage field connects
Component is received, positioned at the medium position of U-shaped yoke, for detecting that the outside of object to be measured whether there is magnetic field signal；First electromagnetism
Ultrasonic coil, below the N poles of U-shaped yoke, is used in combination with the N poles lower end of U-shaped yoke, for producing or receiving following appoint
The one or more detection ripples of meaning：Ultrasonic bulk wave, supersonic guide-wave and surface wave；Second electromagnetic acoustic coil, positioned at the S of U-shaped yoke
Below pole, it is used in combination with the S poles lower end of U-shaped yoke, for producing or receiving any one or more following detection ripple：Ultrasound
Bulk wave, supersonic guide-wave and surface wave, have reached simplified detecting system complexity, and can the corruption of quick detection ferromagnetic metal material
Erosion, face crack and the purpose for detecting internal injury, and then it is real using multiple sensors of discrete to solve prior art
Now cause system complexity high, ineffective ferromagnetic metal material burn into face crack and internal injury detection
Technical problem.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not constitute to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is the sensor schematic of the type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting according to the utility model embodiment；
Fig. 2 is the work of a kind of optional electromagnetic acoustic according to the utility model embodiment and leakage field integral sensor
Principle schematic；
Fig. 3 is a kind of preferred type multimode electromagnetic ultrasound and leakage field integral sensor according to the utility model embodiment
Size design schematic diagram；
Fig. 4 is that a kind of preferred type multimode electromagnetic ultrasound implemented according to the utility model detects sensing with leakage field integral type
Device schematic diagram；And
Fig. 5 is illustrated according to the system architecture of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting of the utility model embodiment
Figure.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
201st, object to be measured；203rd, U-shaped yoke；205th, magneto sensor (leakage field receiving unit)；207th, the first electromagnetic acoustic
Coil；209th, the second electromagnetic acoustic coil；10th, magnetized area；20th, shear wave；30th, guided wave；40th, surface wave；60th, vortex (vortex
)；1st, internal defect；2nd, cosmetic bug；11st, signal generator；12nd, power amplifier；13rd, duplexer；14th, electromagnetic acoustic is believed
Number conditioning unit；15th, magnetic leakage signal conditioning unit；16th, electromagnetic ultrasonic guide wave signal condition unit；17th, multi-channel signal acquiring
Device；18th, host computer；05th, U-shaped yoke；02nd, excitation coil；08th, receiving coil；01st, leakage field receiving unit (magneto sensor)；06、
Leakage field receiving unit mounting seat；03rd, roller；04th, shell；07th, junction block.
Embodiment
In order that those skilled in the art more fully understand the utility model scheme, it is real below in conjunction with the utility model
The accompanying drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all should
When the scope for belonging to the utility model protection.
Embodiment 1
Fig. 1 is the sensor schematic of the type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting according to the utility model embodiment, such as
Shown in Fig. 1, icon 201 show object to be measured, and the sensor includes：U-shaped yoke 203, the material for magnetizing object to be measured,
And produce magnetic field signal in the inside of object to be measured；Leakage field receiving unit 205, positioned at the medium position of U-shaped yoke, for detecting
The outside of object to be measured whether there is stray field signal；First electromagnetic acoustic coil 207, below the N poles of U-shaped yoke, with U
The N poles lower end of type yoke is used in combination, for producing or receiving any one or more following detection ripple：Ultrasonic bulk wave, ultrasound
Guided wave and surface wave；Second electromagnetic acoustic coil 209, below the S poles of U-shaped yoke, is combined with the S poles lower end of U-shaped yoke
Use, for producing or receiving any one or more following detection ripple：Ultrasonic bulk wave, supersonic guide-wave and surface wave.
Alternatively, above-mentioned U-shaped yoke 203 can be permanent magnet, or electromagnet, for producing encouraging for Magnetic Flux Leakage Inspecting
Magnetic magnetic field and the bias magnetic field of electromagnetic acoustic detection；If yoke is permanent magnet, the yoke may be used to provide one and continue
Magnetic field；If yoke is electromagnet (can be the yoke for being wound with coil), need by the way of break-make direct current come
Produce magnetic field.
It should be noted that above-mentioned U-shaped yoke can also replace with shape of a hoof yoke, or that obtained by assembling is in U
The yoke of shape, as long as can realize that the yoke of U-shaped yoke function belongs to the scope of the application protection.
In a kind of optional implementation, above-mentioned leakage field receiving unit 205 can be magneto sensor, measurable magnetic field size and side
To for gathering Analysis of Magnetic Flux Leakage Testing Signals.
The integral sensor of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting that the application is provided, it is possible to achieve pass through a biography
Sensor realizes that Magnetic Flux Leakage Inspecting is detected with electromagnetic acoustic simultaneously, wherein, electromagnetic acoustic detection at least includes：Ultrasonic bulk wave thickness measuring with it is straight
Incident carrying out flaw detection, ultrasonic guided wave detecting function and rayleigh waves inspection.
Specifically, any one coil in above-mentioned first electromagnetic acoustic coil 207 or the second electromagnetic acoustic coil 209 with
U-shaped yoke combination, may make up electromagnetic ultrasonic transducer.Preferably, the first electromagnetic acoustic coil 207 and the second electromagnetic acoustic coil
209 coils in a ring, respectively below the N poles of U-shaped yoke and below S poles, bias magnetic field is provided using U-shaped yoke, when adopting
Inputted with the pumping signal of different driving frequencies to above-mentioned first electromagnetic acoustic coil 207 or the second electromagnetic acoustic coil 209,
First electromagnetic acoustic coil 207 and/or the second electromagnetic acoustic coil 209 can be used for producing and receive ultrasonic bulk wave, surface wave and
Supersonic guide-wave.
As an alternative embodiment, be may be constructed by U-shaped yoke and magneto sensor for carrying out Magnetic Flux Leakage Inspecting
Magnetic Flux Leakage Inspecting sensor, by the use of U-shaped yoke as excitation unit, magneto sensor is as detection of magnetic field device, by exchange or forever
The U-shaped yoke of magnetic-type magnetizes ferrimagnet, if material surface or the defective presence of sub-surface, it will make the magnetic strength in material
Line is distorted, and stray field is produced at the material surface above defect, this stray field is detected using detection of magnetic field device, you can
Realize to ferrimagnet surface or come the detection of surface defect.Have larger in terms of tank floor inspection, pipeline detection
Application prospect.
, can be with structure by the N poles or S poles lower end of U-shaped yoke and electromagnetic acoustic coil as another optional embodiment
Into the electromagnetic acoustic detection sensor for carrying out electromagnetic acoustic detection, by producing ultrasonic bulk wave, surface wave and supersonic guide-wave
Non-Destructive Testing is carried out, with without abrasive material surface, without many merits such as couplant, non-contact detectings, is particularly suitable for use in
Automatic ultrasonic testing equipment.Ultrasonic bulk wave is generally used for pulse echo formula thickness measuring or flaw detection (being a kind of point detection formula technology),
Surface wave is generally used for detecting structural surface defects, and it (is a kind of face detection that supersonic guide-wave, which is generally used for thin-wall construction defects detection,
Technology).The robot that the straight incident sensor of electromagnetic acoustic carries out pulse echo thickness measuring has been carried at present, is usually used in Large Steel knot
Structure wall thickness is surveyed and Corrosion monitoring.Robot is detected compared to piezoelectric supersonic, electromagnetic acoustic detection robot need not be equipped with sander
Structure and water spray coupling mechanism, save machine element part, control module, space, weight and cable etc., with huge superior
Property.
From the foregoing, it will be observed that in the present embodiment, by the way of electromagnetic ultrasonic wave and the detection of leakage field integral type, passing through U-shaped magnetic
Yoke, leakage field receiving unit, the first electromagnetic acoustic coil and the second electromagnetic acoustic coil are combined, obtain a kind of type multimode electromagnetic
The sensor of ultrasound and Magnetic Flux Leakage Inspecting, wherein, U-shaped yoke, the material of the object to be measured for magnetizing object to be measured, and to be measured
The inside of object produces magnetic field；Leakage field receiving unit, positioned at the medium position of U-shaped yoke, the outside for detecting object to be measured
With the presence or absence of magnetic field signal；First electromagnetic acoustic coil, below the N poles of U-shaped yoke, is constituted with the N poles lower end of U-shaped yoke
Electromagnetic ultrasonic transducer；Second electromagnetic acoustic coil, below the S poles of U-shaped yoke, electricity is constituted with the S poles lower end of U-shaped yoke
Magnetic sonac, has reached simplified system element, and can quick detection ferromagnetic metal material burn into face crack
And the purpose of detection internal injury, and then prior art is solved using multiple sensors realization of discrete to ferromagnetism gold
Category material corrosion, face crack and internal injury detection cause that system complexity is high, ineffective technical problem.
It should be noted that due to electromagnetic acoustic and unique structure of leakage field integral type detection sensor, above-mentioned sensing
Device can be realized but be not limited to several detection functions：Magnetic Flux Leakage Inspecting function, ultrasonic bulk wave thickness measuring and straight incident flaw detection function, ultrasound
Guided waves function and rayleigh waves inspection function.
Illustrate above-mentioned several detection functions with reference to Fig. 2.Fig. 2 is according to a kind of optional of the utility model embodiment
Electromagnetic acoustic and leakage field integral sensor operation principle schematic diagram, as shown in Fig. 2 icon 201 show object to be measured
(ferromagnetism is detected component), icon 203 show U-shaped yoke, and icon 205 show magneto sensor.
The first detection function, i.e. Magnetic Flux Leakage Inspecting., will using U-shaped yoke 203 based on the integral sensor shown in Fig. 2
After object (ferromagnetism is detected component) magnetization to be measured, magnetic field signal is produced inside object to be measured, magnetized area 20 is formed, by Fig. 2
As can be seen that a closed magnetic circuit is constituted by U-shaped yoke 203 and object to be measured (tested component) 201, when tested component surface
Or during near surface existing defects (for example, cosmetic bug in Fig. 2 shown in icon 2), magnetic circuit is distorted, and a part of magnetic induction line enters
Enter air, leak into the outside of tested component, stray field is formed, so as to be detected by magneto sensor 205, by believing stray field
Number analyzed, it may be determined that whether there is defect on tested component.
Second of detection function, ultrasonic bulk wave thickness measuring and straight incident carrying out flaw detection function.Passed based on the integral type shown in Fig. 2
Sensor, by the N poles of yoke (for example, U-shaped yoke) or S extremely under either end and coil below, electromagnetic acoustic can be constituted
Sensor.Specifically, the excitation process of ultrasonic wave is illustrated by taking Fig. 2 as an example：When coil (the first electromagnetic acoustic coil 207 or the
Two electromagnetic acoustic coils 209) in when passing to bulk wave response frequency signal f1, usually centre frequency is several megahertzs of narrow-band
Transient pulse signal, ferromagnetic conductor is detected in material and generates vortex 60, from the general principle of electromagnetic induction, this vortex
Field almost may be considered the mirror image of loop coil, and vortex direction is with the sense of current in coil on the contrary, in a certain magnetic pole of U-shaped yoke
Under the vertical magnetic field effect that (N poles or S poles) is provided, vortex field 60 is caused under coil by Lorentz force action, these active forces
The particle of side produces the mechanical oscillation with electric current same frequency in coil.In addition, the wire of coil can also produce the magnetic of dynamic change
, this moving field causes the ferrimagnet below every a line element to produce magnetizing force and magnetostrictive force, these active forces
The particle below coil can be caused to produce the mechanical oscillation with electric current same frequency in coil.In the common work of above-mentioned three kinds of active forces
Under, coupling produces the shear wave 20 of vertical incidence in ferromagnetism waveguide materials, and this shear wave 20 can be used for immediately below coil
The thickness measuring in region or straight incident flaw detection.After ultrasonic bulk wave runs into the bottom surface of object to be measured, back wave is produced, back wave is traveled to
During material surface, cause the material surface particle vibration in magnetic field, produce the electromagnetic wave radiated to surrounding space, and by line
Circle is detected.
The third detection function, ultrasonic guided wave detecting function.Based on the integral sensor shown in Fig. 2, by yoke
Toroidal coil sensors (only needing to one as excitation) below the N poles of (U-shaped yoke) or the extremely a certain poles of S can be realized
Ultrasonic guided wave detecting.From above-mentioned loop coil electromagnetic acoustic operation principle, each coil can be in ferrimagnet surface loop
Shape mirror areas produces vibration source.For certain material, certain thickness structure, in some of low frequency (50kHz~500kHz)
Frequency band (working frequency), can encourage and produce in more single S0 mode guided waves, a kind of optional embodiment, the guided wave of generation
It can be used for detecting the defect in object whole thickness to be measured as indicated at 30 in figure 2, it is internal as shown in icon b in Fig. 2
Defect.Guided wave working frequency is usually narrow frequency range, when excitation produces single S0 mode guided wave, need to use narrow frequency modulation conduct
Detect signal.Due to the symmetry of loop coil, this guided wave is centered on loop coil, and 360 ° of homogeneous radiations are propagated.Guided wave energy
Amount is distributed in thickness direction, therefore can detect the defect in material whole thickness, such as the institute of icon 30 in Fig. 2
Guided wave is shown as, icon 1 show internal defect.
4th kind of detection function, rayleigh waves inspection.Based on the integral sensor shown in Fig. 2, it is placed in by the N of U-shaped yoke
Pole or S extremely under loop coil, from above-mentioned loop coil electromagnetic acoustic operation principle, each coil can be in ferromagnetism material
Expect that the annular mirror areas in surface produces vibration source.Fig. 3 shows a kind of schematic diagram of sensor shape size design, such as Fig. 3 institutes
Show, D is the outermost coil diameter of coil in Fig. 3.In a kind of optional embodiment, the first electromagnetic acoustic coil and the second electricity
The size of magnetic ultrasound coil meets equation below：
A=λRAnd
Wherein, λRFor surface wave wavelength, a is adjacent line source distance, and d is the coil diameter of coil most inner side, and N is just whole
Number, i.e., when adjacent line source distance is equal to the wavelength of surface wave, excitation or a length of λ of received waveRSurface wave.A kind of optional implementation
In example, the surface wave of formation can be used for the surface defect 2 for detecting object to be measured as shown in icon 40 in Fig. 4.
In a kind of optional embodiment, understand that each coil can ferromagnetism material by loop coil electromagnetic acoustic operation principle
Expect that the annular mirror areas in surface produces vibration source.When being detected by above formula to surface wave, there are following two detection patterns：
Pattern one：One, which swashs one, receives detection pattern, and for instance in the coil below N poles as actuated sensor, excitation is produced
Surface wave, coil below S poles as receiving sensor, receiving surface ripple (conversely, the coil below N poles is as reception,
Sensor below S poles is as excitation, and reason is same).When U-shaped yoke N poles to S extremely in the middle of tested material area (i.e.
Rayleigh waves inspection region) when there is cosmetic bug, receive energy when sensor receives surface wave energy relative to zero defect and subtract
It is small, you can to judge to whether there is defect in this region, the amount reduced by energy can assess the size of defect.
Pattern two：Self excitation and self receiving and one swashs one and receives pattern, for instance in the coil below N poles both as actuated sensor or
As sensor is received, the coil below S poles is used as reception sensor, receiving surface ripple.If now rayleigh waves inspection
When region has cosmetic bug, propagated forward signal and reflection are broadcast signal and can connect by the coil below the coil below S poles and N poles
Receive.The size of defect can more accurately be assessed by transmission coefficient and reflectance factor.
It should be noted that in each above-mentioned embodiment, the first electromagnetic acoustic coil and the second electromagnetic acoustic coil tool
There is equivalence, i.e., under independent working mode, when such as self excitation and self receiving electromagnetic ultrasonic thickness measuring, Guided waves, rayleigh waves inspection, can adopt
With the first electromagnetic acoustic coil or the second electromagnetic acoustic coil as transducer, also can both of which use, at this moment require instrument
Electromagnetic acoustic excitation passage is for binary channels or with time-sharing exciting function；Swash one one to receive under cooperative work mode, such as surface wave
When detection, Guided waves, any one in the first electromagnetic acoustic coil or the second electromagnetic acoustic coil is and another as excitation coil
One is used as receiving coil.In detection pattern description below, main body is used as by the first electromagnetic acoustic coil during self excitation and self receiving
Action sensor；One swashs a time receiving, makees sensor as excitation by the first electromagnetic acoustic coil, the second electromagnetic acoustic coil is as sharp
Encourage sensor.Other situations, can be easy to analogy by example below and come out.
Optionally, leakage field receiving unit is magneto sensor, it is preferable that the magneto sensor is Hall chip.
Optionally, sensor also includes：Leakage field receiving unit mounting seat and shell, wherein, leakage field receiving unit mounting seat
For installing leakage field receiving unit, spring is provided between leakage field receiving unit mounting seat and shell, leakage field receiving unit is installed
Certain slip is produced between seat and shell.
In a kind of preferred embodiment, Fig. 4 is that a kind of preferred type multimode electromagnetic implemented according to the utility model surpasses
The sensor schematic of sound and Magnetic Flux Leakage Inspecting；As shown in figure 4, the sensor includes：U-shaped yoke 05, excitation coil 02, reception line
Circle 08, leakage field receiving unit (magneto sensor) 01, leakage field receiving unit mounting seat 06, do not mark in spring schematic diagram, roller 03,
Shell 04, outer casing upper cover (not marked in schematic diagram), junction block 07 are constituted.U-shaped yoke 05 is installed on enclosure, excitation coil
02 and receiving coil 08 respectively be located at U-shaped 05 liang of leg bottom surface of yoke, leakage field receiving unit 01 be installed on leakage field receiving unit installation
On seat 06, leakage field receiving unit mounting seat 06 is installed on shell 04 and positioned at the medium position of U-shaped yoke 05, leakage field receiving unit
Spring is provided between mounting seat 06 and shell 04, leakage field receiving unit mounting seat 06 is produced certain cunning between shell 04
It is dynamic, make leakage field receiving unit 01 can good contact in unit under test, junction block 07 is located at sensor side, excitation coil 02, connects
Take-up circle 08, all wiring of leakage field receiving unit 01 are all connected with junction block 07, and roller 03 is located at sensor base, and it makes biography
Sensor can well be moved on tested surface, and lid keeps matching with shell 04 on shell 04, for after all component is installed
Seal sensor.
Preferably, the geomery of loop coil can be in the sensor：D=18.2mm, d=6.2mm, a=
0.4mm.55 × 40 × 20mm of appearance and size of U-shaped yoke 05, the magnetic field intensity about 5000Gs at coil, magneto sensor can be
Hall chip.
Embodiment 2
According to the utility model embodiment, there is provided the system embodiment of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting.
Fig. 5 is illustrated according to the system architecture of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting of the utility model embodiment
Figure, is examined as shown in figure 5, the system includes the optional or preferred type multimode electromagnetic ultrasound of any one in embodiment 1 with leakage field
The sensor of survey, and signal generator 11 and power amplifier 12.Wherein, signal generator is used to produce and the first electromagnetism is surpassed
The pumping signal of sound coil and the second electromagnetic acoustic coil, power amplifier is used to be amplified pumping signal.
Wherein, electromagnetic acoustic driving source is constituted by signal generator and power amplifier.Electromagnetic acoustic driving source frequency band
Wide scope need to include supersonic guide-wave and ultrasound examination frequency, typically in the range of 10kHz~20MHz.Can during excitation
Control has the narrow-band signal of specific dominant frequency, by entering the first electromagnetic acoustic in integral sensor after duplexer
In coil.
From the foregoing, it will be observed that in the present embodiment, by the way of electromagnetic ultrasonic wave and the detection of leakage field integral type, being sent out by signal
The system that raw device and power amplifier constitute a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting, wherein, signal generator is used to produce
The raw pumping signal to the first electromagnetic acoustic coil and the second electromagnetic acoustic coil, power amplifier is used to carry out pumping signal
Amplification, has reached simplified system element, and can quick detection ferromagnetic metal material burn into face crack and detection
The purpose of internal injury, and then it is rotten to ferromagnetic metal material using multiple sensors realization of discrete to solve prior art
Erosion, face crack and internal injury detection cause that system complexity is high, ineffective technical problem.
Optionally, as shown in figure 5, said system also includes：Duplexer 13, for by the pumping signal input the after amplification
One electromagnetic acoustic coil and the second electromagnetic acoustic coil, and receive the first electromagnetic acoustic coil and the detection of the second electromagnetic acoustic coil
The echo-signal arrived.
In a kind of optional embodiment, duplexer allows high-power pumping signal to enter stimulus sensor, limits big work(
Rate pumping signal enters electromagnetic ultrasonic signal conditioning unit 14, only allows small-signal (the electromagnetic acoustic reception less than a certain voltage
Signal) enter electromagnetic ultrasonic signal conditioning unit 14.
Optionally, as shown in figure 5, said system also includes：Multi-channel signal acquiring device 17, surpasses for receiving the first electromagnetism
The stray field that the echo-signal and leakage field receiving unit that the electromagnetic acoustic coil 209 of sound coil 207 and second is detected are detected
Signal.
In a kind of optional embodiment, multi-channel signal acquiring utensil has to electromagnetic ultrasonic transducer, magneto sensor, electricity
Magnetic sonac receives signal, through electromagnetic acoustic and guided wave signals conditioning unit, magnetic leakage signal conditioning unit 15, electromagnetic acoustic
After the processing of guided wave signals conditioning unit 16, the function of digital-to-analogue conversion sampling is carried out.
Optionally, as shown in figure 5, said system also includes：Host computer 18, for what is uploaded to multi-channel signal acquiring device
Echo-signal and/or magnetic field signal are analyzed, and determine that object to be measured whether there is defect according to analysis result.
In a kind of optional embodiment, host computer 18 is used to be controlled detecting system, mainly has at control system
In under different mode of operations, the specific detection signal of control output, record detection signal and carry out signal transacting, display with it is defeated
Go out.
In a kind of optional embodiment, electromagnetic acoustic and guided wave signals conditioning unit have to the electromagnetic acoustic of reception and
The function that electromagnetic ultrasonic guide wave signal is amplified, can include analog filtering function.
Magnetic leakage signal conditioning unit 15 has to be amplified and filter function to the magnetic leakage signal of reception.
Electromagnetic ultrasonic guide wave signal condition unit 16 has the function being amplified to the guided wave and surface wave signal of reception,
Analog filtering function can be included.
It should be noted that being needed in multiple target Non-Destructive Testing using leakage field, ultrasonic bulk wave, surface wave and a variety of skills of guided wave
During art means, existing isolated sensor and system cause following subject matter：(1) Magnetic Flux Leakage Inspecting, ultrasonic bulk wave thickness measuring and inspection
Survey, the sensor that rayleigh waves inspection and ultrasonic guided wave detecting are used and instrument system are often discrete, or a few persons machine
Tool is combined, and causes number of sensors many or extremely complex, instrument system is more.(2) in perform detection, the sensor of discrete and
System, generally requires substep and carries out multiplicating detection, cause program step many, detection process is numerous and diverse, time-consuming for detection time.
(3) in the occasion detected using robot, a variety of detection sensors or the multiple robots of needs are detected, even if using machinery
The sensor of combined type, instrument system is also difficult to merge, and can cause robot volume increase, weightening etc. of bearing a heavy burden.Especially for
Wall detection machine and pipeline detection robot (pipeline pig) are climbed, extreme influence can be caused, a robot is sometimes integrated into
On be impossible.
And pass through technical scheme disclosed in each above-mentioned embodiment of the utility model, it is possible to achieve following technique effect：(1)
Type multimode electromagnetic ultrasound and the leakage field integral sensor of offer, producing shear wave, surface wave, supersonic guide-wave, (guided wave or SH are led
Ripple), it is to avoid existing detection technique need to be fitted together what is caused using multiple sensors or mechanically several sensor groups
Repeat the shortcoming of detection or sensor complex；(2) type multimode electromagnetic ultrasound and the leakage field integral sensor provided, volume is basic
Do not change the size of sensor in existing each Magnetic Flux Leakage Testing System, kind of a various detection robots can be conveniently used with, such as stored up
Tank bottom, wallboard Corrosion monitoring robot, pipeline detection robot (pipeline pig) etc.；(3) the detecting instrument system provided, is adopted
Ultrasonic thickness measurement and detection, ultrasonic guided wave detecting, rayleigh waves inspection and Magnetic Flux Leakage Inspecting can be realized simultaneously with same instrument system, kept away
Lacking for many set instrument systems need to need to be carried using a variety of instrument systems repetition detection or detection means by having exempted from existing detection technique
Point；(4) detecting instrument provided, with integrated level height, small volume, lightweight feature, can easily be carried to various inspections
Survey in robot system；(5) the type multimode electromagnetic ultrasound provided and Magnetic Flux Leakage Inspecting integral sensor and instrument can synchronously realize
Ultrasonic thickness measurement and detection, ultrasonic guided wave detecting, rayleigh waves inspection and Magnetic Flux Leakage Inspecting, set so as to realize to ferromagnetic metal material
The synchronous detection of standby burn into face crack and internal injury, comprehensively, detection efficiency is high for detection type of impairment.
Above-mentioned the utility model embodiment sequence number is for illustration only, and the quality of embodiment is not represented.
In above-described embodiment of the present utility model, the description to each embodiment all emphasizes particularly on different fields, in some embodiment
The part not being described in detail, may refer to the associated description of other embodiment.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (10)
1. the sensor of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting, it is characterised in that including：
U-shaped yoke (203), the material for magnetizing object to be measured, and produce magnetic field signal in the inside of the object to be measured；
Leakage field receiving unit (205), positioned at the medium position of the U-shaped yoke (203), for detecting the outer of the object to be measured
Portion whether there is stray field signal；
First electromagnetic acoustic coil (207), below the N poles of the U-shaped yoke (203), the N with the U-shaped yoke (203)
Pole lower end is used in combination, for producing or receiving any one or more following detection ripple：Ultrasonic bulk wave, supersonic guide-wave and surface
Ripple；
Second electromagnetic acoustic coil (209), below the S poles of the U-shaped yoke (203), the S with the U-shaped yoke (203)
Pole lower end is used in combination, for producing or receiving any one or more following detection ripple：Ultrasonic bulk wave, supersonic guide-wave and surface
Ripple.
2. sensor according to claim 1, it is characterised in that the first electromagnetic acoustic coil (207) and described
The size of two electromagnetic acoustic coils (209) meets equation below：
A=λRAnd
Wherein, λRFor surface wave wavelength, a is adjacent line source distance, and d is the coil diameter of coil most inner side.
3. sensor according to claim 1, it is characterised in that the leakage field receiving unit (205) is magneto sensor.
4. sensor according to claim 3, it is characterised in that the magneto sensor is Hall chip.
5. sensor according to claim 1, it is characterised in that the sensor also includes：Leakage field receiving unit is installed
Seat and shell, wherein, the leakage field receiving unit mounting seat is used to install the leakage field receiving unit, the leakage field receiving unit
Spring is provided between mounting seat and the shell, makes to produce necessarily between the leakage field receiving unit mounting seat and the shell
Slide.
6. the system of a kind of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting, it is characterised in that including：Claim 1 is to claim 5
Sensor described in middle any one.
7. system according to claim 6, it is characterised in that the system also includes：
Signal generator, for producing the letter of the excitation to the first electromagnetic acoustic coil and the second electromagnetic acoustic coil
Number；
Power amplifier, is connected with the signal generator, for being amplified to the pumping signal.
8. system according to claim 7, it is characterised in that the system also includes：
Duplexer, is connected with the power amplifier, surpasses for the pumping signal after the amplification to be inputted into first electromagnetism
Sound coil and/or the second electromagnetic acoustic coil, and it is super to receive the first electromagnetic acoustic coil and/or second electromagnetism
The echo-signal that sound coil is detected.
9. system according to claim 8, it is characterised in that the system also includes：
Multi-channel signal acquiring device, is connected with the duplexer, for receiving any one or more following signal：Described first
Electromagnetic acoustic Coil Detector to echo-signal, the second electromagnetic acoustic Coil Detector to echo-signal, the leakage field connects
Receive the stray field signal that component detection is arrived.
10. system according to claim 9, it is characterised in that the system also includes：
Host computer, is connected with the multi-channel signal acquiring device, for receiving the signal that the multi-channel signal acquiring device is uploaded,
And the signal is analyzed, determine that the object to be measured whether there is defect according to analysis result.
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