CN110045020A - A kind of electromagnet ultrasonic changer and test macro - Google Patents
A kind of electromagnet ultrasonic changer and test macro Download PDFInfo
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- CN110045020A CN110045020A CN201910400599.0A CN201910400599A CN110045020A CN 110045020 A CN110045020 A CN 110045020A CN 201910400599 A CN201910400599 A CN 201910400599A CN 110045020 A CN110045020 A CN 110045020A
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- 229910001172 neodymium magnet Inorganic materials 0.000 description 4
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Classifications
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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
- G01N29/24—Probes
- G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
-
- 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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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of electromagnet ultrasonic changer and test macros, belong to technical field of nondestructive testing.The electromagnet ultrasonic changer includes: shell and is set to the intracorporal amplifying device of shell, R-T unit and magnet.First face of shell offers leakage field window, non-metallic plates are provided at leakage field window to close leakage field window, R-T unit is located at leakage field window, magnet is between amplifying device and R-T unit, amplifying device is bonded to each other with magnet, amplifying device is connect with R-T unit, and the second face of shell offers outlet hole, apopore and inlet opening, and amplifying device is connect with the signal wire drawn through outlet hole.Test specimen is tested, recirculated cooling water is injected to enclosure interior using apopore and inlet opening, and then maintains the temperature of enclosure interior, solves the problems, such as the High-temperature cooling that metal material detects under red heat state, guarantee that magnets magnetic fields effectively exist, guarantees the sensitivity and accuracy that receive flaw indication.
Description
Technical field
The invention belongs to technical field of nondestructive testing, and in particular to a kind of electromagnet ultrasonic changer and test macro.
Background technique
Equipment in process industrial is to run under the complex environments such as high temperature, high pressure, multimedium, therefore how to ensure this kind of
The reliable long-term operation of equipment safety is one of current concern.By means of modern strength theory, non-destructive testing and break
Split mechanical technology, under normal temperature environment, equipment safety test problems have been basically solved, but it is bad with medium (crude oil) in recent years
The general of interior media burn into corrosion under insulation and high temperature Material degradation occurs for matter, the complication of process, equipment
Rate is higher and higher, and the failure accidents of this respect also repeatedly occur.Currently, having at normal temperature to Steel material defects detection higher
The method of detection accuracy has conventional ultrasound method and eddy current method, but conventional ultrasound method needs couplant, and EDDY CURRENT exists
Sensitivity is not high under high temperature, it is difficult to thousands of degrees Celsius of material tests are reached as high as applied to surface temperature.In addition, in high temperature ring
Under border, magnet (permanent magnet) can lose magnetism, such as neodymium iron boron (Nd2Fe14B) magnet of common trade mark N35 is being more than now
It just loses magnetism after 80 DEG C, loses magnetic field, induction coil just can not work normally.
Summary of the invention
In consideration of it, the purpose of the present invention is to provide a kind of electromagnet ultrasonic changer and test macro, to effectively improve
The above problem.
The embodiment of the present invention is achieved in that
The embodiment of the invention provides a kind of electromagnet ultrasonic changers, comprising: shell and is set to that the shell is intracorporal to be put
Big device, R-T unit and magnet.First face of the shell offers leakage field window, is provided at the leakage field window nonmetallic
Plate of material is to close the leakage field window, and the R-T unit is located at the leakage field window, and the magnet is located at the amplifying device
Between the R-T unit, the amplifying device is bonded to each other with the magnet, the amplifying device and the R-T unit
Connection, the second face of the shell offer outlet hole, apopore and inlet opening, and the apopore and the inlet opening are and institute
Enclosure interior connection is stated, to inject recirculated water to the enclosure interior through the apopore and the inlet opening, and then is maintained
The temperature of the enclosure interior, the amplifying device are connect with the signal wire drawn through the outlet hole.The amplifying device is used
The R-T unit is transferred to after the ac-excited signal amplification for transmitting the signal wire, and by the R-T unit sense
It is transferred out after the electromagnetic signal amplification that should be arrived through the signal wire.
In optional embodiment of the present invention, be mounted on water nozzle at the apopore and the inlet opening, it is described go out
Casing and the casing nut cap with outlet are provided at string holes, the casing nut cap is set on the casing, the signal wire
It is drawn through the casing nut cap.
In optional embodiment of the present invention, the shell includes first shell and second shell, the first shell and
The second shell is sealed in the joint place of the first shell and the second shell using sealing element with respect to shelling, described
Leakage field window is opened in the first shell, and the outlet hole, the apopore and the inlet opening are opened in described
On two shells.
In optional embodiment of the present invention, the amplifying device includes: shielding case and is placed in double in the shielding case
Preamplifier is filled with filled layer, the two-way preposition amplification between the shielding case and the two-way preamplifier
Device is connect with the signal wire and the R-T unit, and the shielding case is bonded to each other with the magnet.
In optional embodiment of the present invention, the filled layer is high temperature encapsulating glue-line.
In optional embodiment of the present invention, the R-T unit includes: circuit board and is set on the circuit board
Coil, the pad on the circuit board uses the encapsulating of high temperature casting glue, achievees the effect that insulative water-proof.
In optional embodiment of the present invention, SiC ceramic plate is provided on the outside of the leakage field window.
In optional embodiment of the present invention, SiO is provided on the inside of the leakage field window2Ceramic wafer.
In optional embodiment of the present invention, further includes: carbonyl iron dust plate, the carbonyl iron dust plate are set to the transmitting-receiving
Between device and the magnet.
The embodiment of the invention also provides a kind of test macros, comprising: host computer, impedance matching module and above-mentioned electromagnetism
Ultrasonic transducer；The host computer is connect with the impedance matching module, the impedance matching module and the electromagnetic acoustic transducer
It can device connection.
Electromagnet ultrasonic changer provided in an embodiment of the present invention, comprising: shell and be set to the intracorporal amplifying device of shell, receipts
Transmitting apparatus and magnet.First face of shell offers leakage field window, is provided with non-metallic plates at leakage field window to close leakage field
Window, R-T unit are located at leakage field window, and between amplifying device and R-T unit, amplifying device mutually pastes magnet with magnet
Close, amplifying device connect with R-T unit, and the second face of shell offers outlet hole, apopore and inlet opening, amplifying device and
The signal wire connection drawn through outlet hole.When being tested using the electromagnet ultrasonic changer test specimen, through apopore and
Recirculated cooling water is injected to enclosure interior in inlet opening, and then maintains the temperature of enclosure interior, ensure that under high temperature environment, transmitting-receiving
Device can sense the ultrasonic signal in test specimen, solve the problems, such as the High-temperature cooling that metal material detects under red heat state,
Guarantee that magnets magnetic fields effectively exist, guarantees the sensitivity and accuracy that receive flaw indication.Meanwhile using contactless flaw detection,
It is not limited by tested material geometry and surface roughness.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that being understood by implementing the embodiment of the present invention.The objectives and other advantages of the invention can be by written
Specifically noted structure is achieved and obtained in specification, claims and attached drawing.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.By the way that shown in attached drawing, above and other purpose of the invention, feature and advantage will be more clear.In whole
Identical appended drawing reference indicates identical part in attached drawing.Attached drawing, emphasis deliberately are not drawn by actual size equal proportion scaling
It is to show the gist of the present invention.
Fig. 1 shows a kind of structural representation of the electromagnet ultrasonic changer provided in an embodiment of the present invention under the first visual angle
Figure.
Fig. 2 shows a kind of structural representation of the electromagnet ultrasonic changer provided in an embodiment of the present invention under the second visual angle
Figure.
Fig. 3 shows the structural schematic diagram of coil provided in an embodiment of the present invention.
Fig. 4 shows electromagnet ultrasonic changer operation principle schematic diagram provided in an embodiment of the present invention.
Fig. 5 shows a kind of structural schematic diagram of test macro provided in an embodiment of the present invention.
Icon: 100- electromagnet ultrasonic changer；110- shell；111- leakage field window；112- outlet hole；113- water outlet
Hole；The inlet opening 114-；115- casing；116- casing nut cap；117- signal wire；120- amplifying device；130- transmitting-receiving dress
It sets；140- magnet；150-SiC ceramic wafer；160-SiO2Ceramic wafer；170- carbonyl iron dust plate；200- test macro；
210- host computer；220- impedance matching module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The test specimen of example 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 embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
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 " center ", "upper", "lower", "left", "right", "inner",
The orientation or positional relationship of the instructions such as "outside" be based on the orientation or positional relationship shown in the drawings or the invention product use
When the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.In addition, term " first ", " second " etc. are only used for distinguishing description, it is not understood to indicate or imply opposite
Importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Currently, the method for having higher detection accuracy to Steel material defects detection at normal temperature has conventional ultrasound method and whirlpool
Stream method, but conventional ultrasound method needs couplant, sensitivity is not high at high temperature for EDDY CURRENT, it is difficult to be applied to surface temperature
Degree reaches as high as thousands of degrees Celsius of material tests.In addition, under high temperature environment, magnet (permanent magnet) can lose magnetism, such as
Neodymium iron boron (Nd2Fe14B) magnet of common trade mark N35 just loses magnetism after more than 80 DEG C now, loses magnetic field, induction
Coil just can not work normally.
For defect present in above scheme, be inventor being obtained after practicing and carefully studying as a result,
Therefore, the discovery procedure of the above problem and the solution that hereinafter embodiment of the present invention is proposed regarding to the issue above, all
It should be the contribution that inventor makes the present invention in process of the present invention.
In consideration of it, please referring to Fig. 1 and Fig. 2 the embodiment of the invention provides a kind of electromagnet ultrasonic changer 100.The electromagnetism
Ultrasonic transducer 100 includes: shell 110 and the amplifying device 120, R-T unit 130 and the magnet that are set in the shell 110
140。
It is hollow structure inside the shell 110, optionally, the shape of the shell 110 is cuboid.In the shell
110 the first face offers leakage field window 111, is provided with non-metallic plates at the leakage field window 111 to close the leakage field
Window 111.The non-metallic plates can be the inside for being set to leakage field window 111, be also possible to be set to outside or inside and outside two
Side is respectively provided with.As a kind of optional embodiment, the outside of the leakage field window 111 is provided with SiC ceramic plate 150, described
The inside of leakage field window 111 is provided with SiO2Ceramic wafer 160.
Second face of the shell 110 offers outlet hole 112, apopore 113 and inlet opening 114.The apopore 113
Be connected to inside the shell 110 with the inlet opening 114, so as to through the apopore 113 and the inlet opening 114 to institute
It states and injects cooling circulating water inside shell 110, and then maintain the temperature inside the shell 110, solve metal under red heat state
The High-temperature cooling problem of material tests guarantees that magnets magnetic fields effectively exist, and guarantees the sensitivity and accuracy that receive flaw indication.
Wherein, which is made of first shell and second shell, and the first shell and the second shell are opposite
Shelling is sealed in the joint place of the first shell and the second shell using sealing element (such as graphite packing), the leakage field
Window 111 is opened in the first shell, and the outlet hole 112, the apopore 113 and the inlet opening 114 open up
In in the second shell.
Wherein, optionally, the first face and the second face are opposite face.
Wherein, which is made of stainless steel, i.e., first shell and second shell are that stainless steel is made.
Wherein, in setting, SiC ceramic plate 150 is adhered to the outside of leakage field window 111 using high-temp glue, by SiO2Pottery
Porcelain plate 160 is adhered to the inside of leakage field window 111.Since the electromagnet ultrasonic changer 100 is to high temperature test specimen polarity test
When, which is directly bonded with the high-temperature continuous casting blank of red heat state, and has good thermal conductivity, is unfavorable for shell
The effect of 110 internal water coolings circulation, therefore, in the SiO that good in insulation effect is arranged on the inside of leakage field window 1112Ceramic wafer
160,110 inside cooling circulating water of shell can be made to reach a good result.
Wherein, above-mentioned SiO2Ceramic wafer 160, which uses, refers to the molding SiO of the lesser isostatic sintering of thermal coefficient2Ceramic wafer
160(SiO260 tons of powder, with the molding of first-class static pressure suppression, are put into sintering furnace and are sintered preparation).
Wherein, which can be opened in any position in the first face, as an alternative embodiment, should
Leakage field window 111 is opened in the middle position in the first face.
Wherein, it is mounted on water nozzle at the apopore 113 and the inlet opening 114, in order to the cooling system with outside
System connection.Casing 115 and the casing nut cap 116 with outlet, the casing nut cap 116 are provided at the outlet hole 112
It is set on the casing 115, the signal wire 117 is drawn through the casing nut cap 116.The signal wire 117 is fixed on casing
In 115, the stability of connection is influenced because of shaking to avoid line.Wherein, the signal wire 117 is by multicore plug and multi-core cable
It constitutes, there is multi-core cable waterproof insulation to protect skin.
Wherein, it is additionally provided with sealing element (such as rubber ring) in the joint place of casing 115 and casing nut cap 116, to avoid leakage
Water.
Wherein, it should be noted that water inside injection shell 110 can through the casing 115 and casing nut cap 116 out
Mouth is drawn；Can also the outlet through the casing 115 and casing nut cap 116 to injecting cooling water inside shell 110.Optionally, exist
The exit of casing nut cap 116 is additionally provided with water nozzle.
The R-T unit 130 is also connect with amplifying device 120, and the R-T unit 130 is located at leakage field window 111, with
Just by the ac-excited signal received through 111 directive test specimen of leakage field window, which swashs in test specimen
Electromagnetic acoustic is issued, and is sensed by R-T unit 130, and then be transferred to amplifying device 120.
Wherein, which includes: circuit board and the coil that is set on the circuit board, optionally, the line
Circle is made of shear wave dispatch coil and R wave dispatch coil, is made by FPCB (flexible circuit board).Wherein, the circuit
Plate is PCB (printed circuit board) plate, and the pad on the circuit board uses the encapsulating of high temperature casting glue, to reach insulative water-proof
Effect.
Wherein, as shown in figure 3, shear wave dispatch coil and R wave dispatch coil are matched using double-deck " butterfly " design structure
Closing signal enhancement algorithm can make signal amplitude increase about 3 times.Coil uses four layers of FPCB structure making sheet, wherein in order to reduce
The circuit noise that coil generates, double-deck " butterfly " design structure of coil proposed adoption, while between shielded coil and tested material
Electromagnetic noise caused by " parasitic capacitance " formed, respectively designs one layer of squelch circuit in the upper and lower surface of double-layer coil.
Magnet 140 is between amplifying device 120 and R-T unit 130, for providing a stable magnetic field environment.It can
Selection of land, the magnet 140 are permanent magnet.
The amplifying device 120 is bonded to each other with the magnet 140, the amplifying device 120 and the R-T unit 130
Connection, the amplifying device 120 are connect with the signal wire 117 drawn through the outlet hole 112.The amplifying device 120 is used for
It is transferred to the R-T unit 130 after the ac-excited signal that the signal wire 117 transmits is amplified, and the transmitting-receiving is filled
It is transferred out after setting the electromagnetic signal amplification that 130 sense through the signal wire 117.
Wherein, the amplifying device 120 includes: shielding case and the two-way preamplifier that is placed in the shielding case, institute
It states between shielding case and the two-way preamplifier filled with filled layer, the two-way preamplifier and the signal wire
117 and the R-T unit 130 connect, the shielding case is bonded to each other with the magnet 140.
The filled layer can be foam grain, be also possible to other, for example, high temperature encapsulating glue-line, i.e., after high-temp glue solidification
In its surface covering high-temperature casting glue, so that high-temp glue is totally immersed in high temperature casting glue after solidification, and then forms high temperature and fill
Adhesive layer.The high-temp glue is resistance to 1300 DEG C of HR-8787 one pack system high-temp glue, and the high temperature casting glue is that Ao Sibang 190 is high
Warm casting glue.
In addition, as an alternative embodiment, electromagnet ultrasonic changer 100 further include: carbonyl iron dust plate 170, institute
Carbonyl iron dust plate 170 is stated to be set between the R-T unit 130 and the magnet 140.The carbonyl iron dust plate 170 is for enhancing
Magnetic field.
Wherein, it should be noted that electromagnet ultrasonic changer 100 is the basic principle based on electromagnetic acoustic detection to tested
What test specimen was detected.The transmitting and reception of electromagnetic ultrasonic signal are based on mutual between electromagnetism physical field and mechanical wave field
It converts, is linked together between two physical fields by the field of force.There are three types of mechanism: Lorentz force for the transmitting and reception of electromagnetic acoustic
Mechanism, magnetostrictive force mechanism and magnetizing force mechanism.In the detection process of nonferromugnetic material, Lorentz force plays main make
With also suffering from the effect of magnetostrictive force and electromagnetic force in the detection process of ferrimagnet.In most cases, electric
The absolute value of magnetic force is more much smaller than the above two absolute value.Three can be divided into according to the composition of electromagnetic acoustic mutually to interconnect
The part of system: magnet 140, coil and test specimen, the reception and transmitting of electromagnetic acoustic can be regarded as between these three parts
Interaction, mechanism is as shown in Figure 4.Magnet 140 provides stabilizing magnetic field, transmitting coil and reception line for test specimen
Circle is inducted in test specimen and is received vortex by the law of electromagnetic induction.Test specimen is the main body of field action, 140 He of magnet
The induced field of coil interacts in test specimen, electromagnetic sound is inspired in test specimen, and using electromagnetic sound to test specimen
It carries out non-destructive testing, test specimen is both test object, can also be counted as the sound source of electromagnetic acoustic.
The embodiment of the invention also provides a kind of test macros 200, as shown in Figure 5.The test macro 200 includes: upper
Machine 210, impedance matching module 220 and above-mentioned electromagnet ultrasonic changer 100.The host computer 210 and the impedance matching mould
Block 220 connects, and the impedance matching module 220 is connect with the electromagnet ultrasonic changer 100.
When detecting, host computer 210 sends ac-excited signal to impedance matching module 220, the ac-excited signal warp
R-T unit 130 is acted on after the amplifying device 120 in impedance matching module 220 amplifies after impedance matching module 220, is exchanged
Pumping signal generates vortex in tested metalwork by transmitting coil, total by two kinds of mechanism of Lorentz force and magnetostrictive force
Same-action motivates ultrasonic signal (electromagnetic signal), and ultrasonic wave reflects after meeting defect, be received it is coil-induced, through putting
It is transferred to impedance matching module 220 through signal wire 117 after the big amplification of device 120, then returns to the progress of host computer 210 defect and sentences
Not.Wherein, need to illustrate when, in the detection process to nonferromugnetic material, Lorentz force plays a major role, to ferromagnetic
In the detection process of property material, the effect of magnetostrictive force and electromagnetic force is also suffered from.
Wherein, in test, electromagnet ultrasonic changer 100 is fixed on to the top of tested metalwork by fixing piece, adjusted
The distance between whole electromagnet ultrasonic changer 100 and tested metalwork are to 5mm or so.
Wherein, test when, which also connect with cooling system, by the cooling system to this
Recirculated cooling water is injected inside shell 110, to maintain the temperature inside the shell 110.
Wherein, cooling system specifically includes that water tank, water pump and aqueduct.Water tank passes through water for storing cooling water
It pumps and cooling water is injected or extracted out into shell 110.
In conclusion electromagnet ultrasonic changer provided in an embodiment of the present invention includes shell (by first shell and second shell
Body is constituted) and it is set to the intracorporal amplifying device of the shell, R-T unit, carbonyl iron dust plate (for enhancing magnetic field) and magnet
(for providing stable magnetic field environment).First face of the shell offers leakage field window, and in the leakage field, side is provided with outside window
SiC ceramic plate, inside are provided with SiO2Ceramic wafer, to close the leakage field window.The R-T unit is located at the leakage field window,
The magnet between the amplifying device and the R-T unit, the carbonyl iron dust plate be set to the R-T unit with
Between the magnet, the amplifying device is bonded to each other with the magnet, and the amplifying device is connect with the R-T unit.Institute
The second face for stating shell offers outlet hole, apopore and inlet opening, the apopore and the inlet opening with the shell
Inside connection to inject recirculated water to the enclosure interior through the apopore and the inlet opening, and then maintains the shell
The temperature in internal portion, the amplifying device are connect with the signal wire drawn through the outlet hole.Use the electromagnet ultrasonic changer
When testing test specimen, recirculated cooling water is injected to enclosure interior through apopore and inlet opening, and then maintain in shell
The temperature in portion ensure that under high temperature environment R-T unit can sense the ultrasonic signal in test specimen, solve red heat shape
The High-temperature cooling problem that metal material detects under state guarantees that magnets magnetic fields effectively exist, and guarantees the sensitivity for receiving flaw indication
And accuracy.Meanwhile using contactless flaw detection, do not limited by tested material geometry and surface roughness.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electromagnet ultrasonic changer characterized by comprising shell and be set to the intracorporal amplifying device of the shell, receipts
Transmitting apparatus and magnet；First face of the shell offers leakage field window, be provided at the leakage field window non-metallic plates with
The leakage field window is closed, the R-T unit is located at the leakage field window, and the magnet is located at the amplifying device and the receipts
Between transmitting apparatus, the amplifying device is bonded to each other with the magnet, and the amplifying device is connect with the R-T unit, described
Second face of shell offers outlet hole, apopore and inlet opening, and the apopore and the inlet opening are and in the shell
Portion's connection to inject recirculated water to the enclosure interior through the apopore and the inlet opening, and then maintains the shell
Internal temperature, the amplifying device are connect with the signal wire drawn through the outlet hole；
The amplifying device is used to be transferred to the R-T unit after amplifying the ac-excited signal that the signal wire transmits, with
And it is transferred out after amplifying the electromagnetic signal that the R-T unit senses through the signal wire.
2. electromagnet ultrasonic changer according to claim 1, which is characterized in that equal at the apopore and the inlet opening
Water nozzle is installed, casing and the casing nut cap with outlet are provided at the outlet hole, the casing nut cap is set in institute
It states on casing, the signal wire is drawn through the casing nut cap.
3. electromagnet ultrasonic changer according to claim 1, which is characterized in that the shell includes first shell and second
Shell, the first shell and the second shell are with respect to shelling, in the joint place of the first shell and the second shell
Sealed using sealing element, the leakage field window is opened in the first shell, the outlet hole, the apopore and it is described into
Water hole is opened in the second shell.
4. electromagnet ultrasonic changer according to claim 1, which is characterized in that the amplifying device include: shielding case and
The two-way preamplifier being placed in the shielding case, filled with filling between the shielding case and the two-way preamplifier
Layer, the two-way preamplifier are connect with the signal wire and the R-T unit, and the shielding case and the magnet are mutual
Fitting.
5. electromagnet ultrasonic changer according to claim 4, which is characterized in that the filled layer is high temperature encapsulating glue-line.
6. electromagnet ultrasonic changer according to claim 1, which is characterized in that the R-T unit include: circuit board with
And it is set to the coil on the circuit board, the pad on the circuit board uses the encapsulating of high temperature casting glue, and it is anti-to reach insulation
The effect of water.
7. electromagnet ultrasonic changer according to claim 1, which is characterized in that be provided on the outside of the leakage field window
SiC ceramic plate.
8. electromagnet ultrasonic changer according to claim 7, which is characterized in that be provided on the inside of the leakage field window
SiO2Ceramic wafer.
9. electromagnet ultrasonic changer according to claim 1-8, which is characterized in that further include: carbonyl iron dust
Plate, the carbonyl iron dust plate are set between the R-T unit and the magnet.
10. a kind of test macro characterized by comprising host computer, impedance matching module and any one of such as claim 1-9
The electromagnet ultrasonic changer；The host computer is connect with the impedance matching module, the impedance matching module with it is described
Electromagnet ultrasonic changer connection.
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