CN107085042A - A kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating - Google Patents
A kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating Download PDFInfo
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- CN107085042A CN107085042A CN201611167811.6A CN201611167811A CN107085042A CN 107085042 A CN107085042 A CN 107085042A CN 201611167811 A CN201611167811 A CN 201611167811A CN 107085042 A CN107085042 A CN 107085042A
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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
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
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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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
Abstract
The present invention relates to a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating.Including shell 1, wearing layer 5, period 1 property permanent magnet 6, Secondary periodicity permanent magnet 8, racetrack AC coil 7；Focus on control stick 2 to be connected by revolute pair with shell 1, the upper end gear of work shape gear 3 is fixed in the gear focused on control stick 2 and is meshed；Angular wheel 12 is connected by revolute pair and work shape gear 3, and the lower end gear of work shape gear 3 is meshed with roller gear 9；Roller gear 9 is connected by revolute pair with angular wheel 12, and angular wheel 12 is connected by revolute pair with focusing on control stick 2, and reversing maneuver bar 4 is connected by gear pair with angular wheel 12；Shell 1 is connected by revolute pair with reversing maneuver bar 4.The present invention realizes that SH ripples are focused on by changing the angle between PPM pairs and below 7 two sections of straight conductors of racetrack AC coil, and racetrack AC coil realizes the commutation of SH ripples by PPM pairs of integral-rotation and below, so as to realize fan sweeping of the SH ripples in certain angle.
Description
Technical field
The invention belongs to technical field of nondestructive testing, and in particular to a kind of SH ripple electromagnetic acoustic transducings for focusing on and commutating
Device, it is adaptable to the electromagnetic supersonic flaw detecting detection of non-ferromagnetic metal.
Background technology
Ultrasonic transducer is a kind of device that can realize that energy is converted between mechanical energy and acoustic energy.Based on different excitations
And record principle, current field of non destructive testing mainly has two kinds of ultrasonic transducers：A kind of is that the piezoelectricity based on piezo-electric effect is changed
Energy device (Piezoelectric Transducer, abbreviation PZT), another is based on Lorentz force and magnetostrictive force mechanism
Electromagnet ultrasonic changer (Electromagnetic Acoustic Transducer, abbreviation EMAT).
Electromagnetic acoustic is a kind of emerging technology of field of non destructive testing, compared with traditional piezoelectric supersonic detection technique, tool
Have non-contact measurement, without couplant, a variety of guided wave modals can be encouraged the features such as, can both realize the various inspections of conventional Ultrasound
Brake, can apply to the special occasions such as hot environment and the detection of the test specimen with clad again.Because its detection speed is fast,
Environmental suitability is strong, thus receives more and more attention.
Electromagnet ultrasonic changer can be not only used for encouraging body by adjusting the space arrangement of bias magnet and AC coil
Ripple, it can also be used to encourage guided wave.Wherein, guided wave can be broadly divided into Lamb wave and tube wave, and Lamb wave mainly includes Rayleigh (Rayleigh)
Ripple, blue nurse (Lamb) ripple and horizontal shear (Shear horizontal, abbreviation SH) ripple, tube wave mainly includes vertical
(Longitudinal) ripple, torsion (Torsional) ripple and bending (Flexural) ripple.
SH ripples are a kind of shearing waves being present in plate class waveguide, and its particle displacement is oriented parallel to the surface of plate.SH ripples
There are two kinds of symmetrical mode (Symmetric mode) and antisymmetry mode (Anti-symmetric mode), its phase velocity and group
Speed depends on the velocity of wave of frequency and sample thickness and body shearing wave.In equal thickness plate, SH0Mode is symmetrical non-frequency dispersion
Mode, and its velocity of wave is equal to the velocity of wave of body shearing wave in medium.
Periodicity permanent magnet electromagnet ultrasonic changer (Periodic Permanent Magnet EMAT, abbreviation PPM
EMAT) SH ripples can be motivated in non-ferromagnetic metal plate (e.g., aluminium sheet etc.), it is mainly by the PPM that is arranged in parallel to, runway
Type AC coil, shell, interface and impedance matching system etc. are constituted.
There is provided in the magnetic field of detection sample surface, racetrack AC coil for opposite polarity between PPM adjacent cells
Be passed through after alternating current, vortex flow can be induced in detection sample surface, vortex flow in the case where the vertical magnetic field that PPM is provided is acted on,
Specific direction periodic vibration is produced, so as to motivate SH ripples in detection sample.
The PPM EMAT of conventional driver SH ripples, its PPM pairs with two sections of straight wire portions of racetrack AC coil below
Generally parallel arrangement, with the symmetry in structure, thus can motivate SH ripples respectively along two opposite directions simultaneously, i.e., real
Two-way the exciting of existing SH ripples, thus it is easily introduced the interference of end reflections echo；In addition PPM is in parallel arrangement, it is impossible to real
Acoustic energy focusing in present regional area, and two semicircular conductor parts of racetrack AC coil are also readily incorporated non-SH
The interference of mode guided wave, causing the signal to noise ratio of transducer reduces, and influences the identification and explanation of flaw indication.
The SH ripples that traditional PPM EMAT are motivated along waveguide detect test specimen through thickness internal vibration propagate when, with propagation
The increase of distance, the energy of SH ripples can be because of the constantly decay such as scattering, transmission and absorption so that the energy density drop in detection zone
It is low, so as to influence its defects detection and recognition capability, reduce the valid analysing range of SH ripple single activations.
The PPM EMAT of conventional driver SH ripples, it is difficult to change PPM pairs and the below sensing of AC coil, thus be difficult to reality
Existing sector scan of the SH ripples in certain detection range.
The content of the invention
It is contemplated that at least solving one of above-mentioned technical problem to a certain extent；Therefore, the present invention proposes that one kind can
The SH ripple electromagnet ultrasonic changers for focusing on and commutating, make it have more preferable practicality and flexibility in actually detected.
The SH ripple electromagnet ultrasonic changers for focusing on and commutating according to embodiments of the present invention, including shell, the shell
Bottom be connected with wearing layer；Period 1 property permanent magnet, Secondary periodicity permanent magnet, the period 1 property permanent magnet,
Arrange in pairs two cycles permanent magnet opposite polarity, constitute PPM pairs；Racetrack AC coil, the racetrack AC coil
Formed by a wire coiling, including two sections of straight wire portions and two sections of semicircular conductor parts, two sections of straight conductors
Fixation is bonded in period 1 property permanent magnet, the bottom of Secondary periodicity permanent magnet respectively for part；The SH ripples that can be focused on and commutate
Electromagnet ultrasonic changer also includes：Focus on control stick, roller gear, angular wheel, reversing maneuver bar.
The focusing control stick is arranged in the middle of the top of shell, is connected, is not deposited between the two by revolute pair with shell
Slided axially opposing；The upper end gear of the work shape gear by gear pair be fixed in focus on control stick on gear mutually nibble
Close；The angular wheel is connected by revolute pair and work shape gear, is slided between the two in the absence of axially opposing；The work shape tooth
The lower end gear of wheel is meshed with roller gear；Roller gear is connected by revolute pair with angular wheel, is not deposited between the two
Slided axially opposing；The angular wheel is connected by revolute pair with focusing on control stick, between the two in the absence of axial phase
To sliding；The reversing maneuver bar is arranged on the side wall of shell, is connected with shell by revolute pair, between the two in the absence of axle
To relative slip；The reversing maneuver bar is connected by gear pair with angular wheel；The period 1 property permanent magnet is affixed
In the bottom of work shape gear lower end gear；The Secondary periodicity permanent magnet is fixed in the bottom of roller gear.
The focusing control stick, work shape gear, roller gear and angular wheel constitute SH ripple focusing systems, the commutation behaviour
Vertical pole and angular wheel constitute SH ripple exchange systems.
The major function of the SH ripples focusing system is change cyclic array magnet pair and racetrack AC line below
The angle enclosed between two sections of straight conductors；The major function of SH ripple exchange systems be ensure PPM pairs exchanged with racetrack below
Under conditions of angle is constant between two sections of straight conductors of coil, make PPM pairs and below racetrack AC coil integral-rotation one
Angle.
The SH ripple electromagnet ultrasonic changers for focusing on and commutating according to embodiments of the present invention, by changing PPM pairs and its
Angle between two sections of straight wire portions of lower section racetrack AC coil, makes that one end of magnet is close, and the other end is remote, and close
The guided wave at end is gradually focused on, and the guided wave away from end gradually dissipates, and so as to realize that the unidirectional of guided wave excites, effectively suppresses end
The interference of reflection echo；By using angular wheel as travel(l)ing rest, do not changing PPM pairs and below racetrack AC coil
Between two sections of straight wire portions in the case of angle, PPM pairs and below AC coil integral-rotation are driven, so as to change SH
Excitation orientation, conveniently and efficiently realizes the sector scan of SH ripples.
In addition, the SH ripple electromagnet ultrasonic changers for focusing on and commutating according to embodiments of the present invention, can also have such as
Under additional technical feature.
According to one embodiment of present invention, the upper end gear and lower end gear of the work shape gear are fixed by jackshaft and connected
It is connected together, the reference radius of lower end gear is equal to twice of the reference radius of upper end gear.
According to one embodiment of present invention, the number of teeth and reference radius for focusing on control stick gear are fixed in, respectively
It is equal with the number of teeth and reference radius of work shape gear upper end gear.
According to one embodiment of present invention, the number of teeth and reference radius of work shape gear lower end gear, respectively with cylinder
The number of teeth and reference radius of gear are equal.
According to one embodiment of present invention, the enclosure cavity is in cylinder.
According to one embodiment of present invention, the racetrack AC coil is formed by flexible material printing, and the two of coil
Section semicircular conductor part is lifted on the bottom of angular wheel by spring respectively.
According to one embodiment of present invention, in addition to BNC connector, crossed beam trunking is carved with shell, from racetrack exchange
The wire drawn on coil is connected by crossed beam trunking with BNC connector；BNC connector is fixed on the side wall of shell.
According to one embodiment of present invention, it is described focusing control stick, work shape gear, reversing maneuver bar, roller gear and
Angular wheel is made by non-magnet material.
The period 1 property permanent magnet, Secondary periodicity permanent magnet are elongated, and magnet polarity interlocks along its length
Arrangement.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the front view structure sketch of electromagnet ultrasonic changer.
Fig. 2 is the side view structure diagram of electromagnet ultrasonic changer.
Fig. 3 is electromagnet ultrasonic changer focusing task schematic diagram.
Fig. 4 is electromagnet ultrasonic changer commutation work schematic diagram.
Fig. 5 is the schematic diagram of cyclic array magnet pair and racetrack AC coil.
Fig. 6 is the two-dimensional simulation figure of SH wave excitations when electromagnet ultrasonic changer is in focus state.
Fig. 7 is the two-dimensional simulation figure of SH wave excitations when electromagnet ultrasonic changer is in non-focusing state.
Fig. 8 is that electromagnet ultrasonic changer is in the SH ripples displacement amplitude normalization polar diagram motivated under focus state.
In figure：1st, shell；2nd, control stick is focused on；3rd, work shape gear；4th, reversing maneuver bar；5th, wearing layer；6th, the period 1
Property permanent magnet；7th, racetrack AC coil；8th, Secondary periodicity permanent magnet；9th, roller gear；10th, wire；11st, BNC connector；
12nd, angular wheel.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
A kind of SH ripple electromagnetic acoustic transducings for focusing on and commutating according to embodiments of the present invention are described below in conjunction with the accompanying drawings
Device.
As shown in figure 1, a kind of SH ripples electromagnet ultrasonic changer for focusing on and commutating includes mechanical system and electrical system.
The mechanical system of transducer includes shell 1, wearing layer 5, SH ripples focusing system and SH ripple exchange systems；SH ripples are focused on
System is made up of focusing control stick 2, work shape gear 3, roller gear 9 and angular wheel 12, and SH ripple exchange systems are by reversing maneuver
Bar 4 and angular wheel 12 are constituted.
Electrical system includes period 1 property permanent magnet 6, racetrack AC coil 7, Secondary periodicity permanent magnet 8, wire
10 and BNC connector 11.
The assembly relation of mechanical system is to focus on control stick 2 to be connected by revolute pair with shell 1, is not present between the two
It is axially opposing to slide；The upper end gear of work shape gear 3 is meshed by gear pair with the gear being fixed on focusing control stick 2；
Angular wheel 12 is connected by revolute pair and work shape gear 3, is slided between the two in the absence of axially opposing；Under work shape gear 3
End tooth wheel is meshed with roller gear 9；Roller gear 9 is connected by revolute pair with angular wheel 12, is not present between the two
It is axially opposing to slide；Angular wheel 12 is connected by revolute pair with focusing on control stick 2, between the two in the absence of axially opposing cunning
It is dynamic；Reversing maneuver bar 4 is connected by gear pair with angular wheel 12；Shell 1 is connected by revolute pair with reversing maneuver bar 4
Connect, slided between the two in the absence of axially opposing；Wearing layer 5 is fixed in the bottom of shell 1.
The assembly relation of electrical system is that period 1 property permanent magnet 6 is elongated, and magnet unit polarity is along its length
Interlaced arrangement；Secondary periodicity permanent magnet 8 is elongated, magnet unit polarity interlaced arrangement along its length；Period 1 property
Permanent magnet 6 is fixed in the bottom of the lower end gear of work shape gear 3；Secondary periodicity permanent magnet 8 is fixed in the bottom of roller gear 9；The
One periodicity permanent magnet 6 and the opposite polarity of Secondary periodicity permanent magnet 8 ground arrangement in pairs.Racetrack AC coil 7 is led by one
Line coiling is formed, including two sections of straight wire portions and two sections of semicircular conductor parts, and two sections of straight wire portions are fixed respectively
The bottom of Secondary periodicity permanent magnet 8 and period 1 property permanent magnet 6 is bonded in, two sections of semicircular conductor parts pass through bullet respectively
Spring is lifted on the bottom of angular wheel 12；Crossed beam trunking is carved with shell 1, the wire drawn from racetrack AC coil 7 leads to
Crossed beam trunking is crossed to be connected with BNC connector 11；BNC connector 11 is fixed on the side wall of shell 1.
Size relationship between each part is to be fixed in the number of teeth and reference radius that focus on the gear of control stick 2, respectively
Equal to the number of teeth and reference radius of the upper end gear of work shape gear 3；The number of teeth and reference radius of the lower end gear of work shape gear 3,
The respectively equal to number of teeth and reference radius of roller gear 9, and the reference radius of the lower end gear of work shape gear 3 is equal to work shape tooth
Take turns 3 upper end gear compound graduation radius of circles twice；Enclosure cavity facilitates the rotation of each moving component in cylinder.
As shown in Fig. 2 racetrack AC coil 7 is formed by flexible material printing, four parts, i.e., two sections can be divided into and put down
Straight wire part and two sections of semicircular conductor parts, two sections of semicircular conductor parts of coil are lifted on taper by spring respectively
The bottom of gear 12；The relative motion that may be either the lower end gear of work shape gear 3 and roller gear 9 provides certain deflection yoke,
Also the lift-off between two sections of semicircular conductor parts and detection sample can be increased, suppress the generation of non-SH mode guided wave.
As shown in figure 3, a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating proposed by the present invention, SH ripples focus on system
The operation principle of system is, in the case where not rotating reversing maneuver bar 4, and angular wheel 12 is connected equivalent to shell 1, therefore nothing
Method is around the place center axis thereof of control stick 2 is focused on, and now rotary-focusing control stick 2, then can drive and be fixed in focusing control stick 2
On center axis thereof of the gear where control stick 2 is focused on, being fixed in the gear focused on control stick 2 can also be by gear
Subband start building shape gear 3 upper end gear around own axes produce reverse rotation.Upper end gear and lower end due to work shape gear 3
Gear is fixedly connected by jackshaft, thus the lower end gear of work shape gear 3 can be around own axes generation and end tooth on work shape gear 3
The rotating Vortex of wheel, the lower end gear of work shape gear 3 then can by gear pair, drive roller gear 9 around own axes produce with
The reverse rotation of the lower end gear of work shape gear 3.
Its SH ripple focusing principle is, in the case where not rotating reversing maneuver bar 4, rotary-focusing control stick 2 so that work shape
The lower end gear and roller gear 9 of gear 3 are reversely rotated, and change the cyclic array magnet (He of period 1 property permanent magnet 6
Secondary periodicity permanent magnet 8) pair and the angle between 7 two sections of straight wire portions of racetrack AC coil below, make its one end
Close, the other end is remote.Close to holding excited SH ripples gradually to focus on, then can gradually it be dissipated away from the excited SH ripples in end,
So as to realize that SH ripples to a certain extent unidirectional excites and a range of acoustic energy focusing.
As shown in figure 4, a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating proposed by the present invention, SH ripples commutation system
The operation principle of system is, in the case of not rotary-focusing control stick 2, due to the friction between gear pair much larger than revolute pair it
Between friction, therefore be fixed in focus on control stick 2 on gear and the upper end gear of work shape gear 3 between gear pair, relative to
It is equivalent to and is fixedly connected for revolute pair between focusing control stick 2 and shell 1, thus focuses on control stick 2, the and of work shape gear 3
Roller gear 9 is fixedly installed on angular wheel 12 equivalent to overall.There is revolute pair due to focusing between control stick 2 and shell
Connection, thus angular wheel 12 can be around the travel(l)ing rest for focusing on the place central axis rotation of control stick 2 equivalent to one.Rotation
Reversing maneuver bar 4, you can drive angular wheel 12 to be rotated around the place central axis of control stick 2 is focused on, and then drive focusing to manipulate
Bar 2, work shape gear 3 and roller gear 9 are around the focusing place central axis integral-rotation of control stick 2.
SH ripple reversing principles are, in the case of not rotary-focusing control stick 2, rotation reversing maneuver bar 4 so that focus on behaviour
Vertical pole 2, work shape gear 3 and roller gear 9 are under the drive of angular wheel 12, and around focusing on, the place central axis of control stick 2 is overall
Rotation, so do not change cyclic array magnet (period 1 property permanent magnet 6 and Secondary periodicity permanent magnet 8) with below
Between 7 two sections of straight wire portions of racetrack AC coil in the case of angle, the SH ripple direction of the launch is set to change, so that real
Existing fan sweeping of the SH ripples in the range of certain angle.
Size between a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating proposed by the present invention, its all parts
Relation is to be fixed in the number of teeth and reference radius that focus on the gear of control stick 2, respectively equal to work shape gear 3 upper end gear
The number of teeth and reference radius；The number of teeth of the lower end gear of work shape gear 3 and the number of teeth of reference radius, respectively equal to roller gear 9
And reference radius；And the reference radius of the lower end gear of work shape gear 3 is equal to the upper end gear compound graduation radius of circle of work shape gear 3
Twice.
As shown in figure 5, racetrack AC coil 7 is formed by flexible material printing, four parts, i.e., two sections can be divided into and put down
Straight wire part and two sections of semicircular conductor parts, two sections of straight wire portions of coil are respectively and fixedly connected with cyclic array magnet
To lower section.
Figure, 6, which show electromagnet ultrasonic changer, is in focus state, i.e. cyclic array magnet (period 1 property permanent magnetism
Iron 6 and Secondary periodicity permanent magnet 8) with 7 two sections of straight wire portions of racetrack AC coil arrangement in a certain angle below
When, the two-dimensional simulation figure of SH wave excitations.As can be seen from Figure 6, the displacement amplitude of right side guided wave is significantly greater than left side guided wave, and left side is led
There is substantially diverging in ripple, thus diffusive attenuation is serious in communication process, it is believed that proposed by the present invention to focus on and commutate
SH ripples electromagnet ultrasonic changer can suppress the interference of end face reflection echo to a certain extent, realize that the unidirectional of guided wave swashs
Hair.
It is illustrated in figure 7 electromagnet ultrasonic changer and is in non-focusing state, be i.e. cyclic array magnet is to (period 1 property
Permanent magnet 6 and Secondary periodicity permanent magnet 8) when being arranged in parallel with 7 two sections of straight wire portions of racetrack AC coil below,
The two-dimensional simulation figure of SH wave excitations.Energisation mode shown in Fig. 7 is equal to traditional SH ripple PPM EMAT energisation mode.By scheming
7 understand that the displacement amplitude of left and right sides guided wave is essentially identical, and transducer has clearly bi-directional exciting phenomena.Carried out with reference to Fig. 6
Contrast is it can be found that the displacement amplitude of right side guided wave, therefore can be with apparently higher than the displacement amplitude of right side guided wave in Fig. 7 in Fig. 6
Think, the SH ripples electromagnet ultrasonic changer proposed by the present invention for focusing on and commutating can realize the poly- of guided wave to a certain extent
Acoustic density in Jiao, increase detection model, improves the signal to noise ratio of detection signal, increases the effective detection face of SH ripple single activations
Product.
It is illustrated in figure 8 electromagnet ultrasonic changer and is in focus state, i.e. cyclic array magnet to (period 1 property is forever
Magnet 6 and Secondary periodicity permanent magnet 8) with 7 two sections of straight wire portions cloth in a certain angle of racetrack AC coil below
The SH ripples displacement amplitude normalization polar diagram motivated when putting.It is apparent that from Fig. 8, electromagnetism proposed by the invention
The SH ripples that ultrasonic transducer is motivated have obvious one way propagation characteristic and good directive property.
In the description of the invention, it is to be understood that the orientation or position of the instruction such as term " on ", " under ", " axial direction "
Relation is, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplify description, without referring to
Show or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration and operation, therefore can not manage
Solve as limitation of the present invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.
In the present invention, unless otherwise clearly defined and limited, term " affixed ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine
Tool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not direct contact but by it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are directly over second feature and oblique upper, or be merely representative of
Fisrt feature level height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Claims (9)
1. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating, including
Shell (1), the bottom of the shell (1) is connected with wearing layer (5)；
Period 1 property permanent magnet (6), Secondary periodicity permanent magnet (8), the period 1 property permanent magnet (6), second round
Property permanent magnet (8) opposite polarity in pairs arrangement, constitute PPM pairs；
Racetrack AC coil (7), the racetrack AC coil (7) is formed by a wire coiling, including two sections straight are led
Line part and two sections of semicircular conductor parts, fixation is bonded in period 1 property permanent magnet to two sections of straight wire portions respectively
(6), the bottom of Secondary periodicity permanent magnet (8), it is characterised in that also include：Focus on control stick (2), roller gear (9), taper
Gear (12), reversing maneuver bar (4)；
The focusing control stick (2) is arranged in the middle of the top of shell (1), is connected with shell (1) by revolute pair, between the two
Slided in the absence of axially opposing；
The upper end gear of the work shape gear (3) is meshed by gear pair with the gear being fixed on focusing control stick (2)；
The angular wheel (12) is connected by revolute pair and work shape gear (3), is slided between the two in the absence of axially opposing；
The lower end gear of the work shape gear (3) is meshed with roller gear (9)；Roller gear (9) passes through revolute pair and taper
Gear (12) is connected, and is slided between the two in the absence of axially opposing；
The angular wheel (12) is connected by revolute pair with focusing on control stick (2), between the two in the absence of axially opposing cunning
It is dynamic；
The reversing maneuver bar (4) is arranged on the side wall of shell (1), is connected with shell (1) by revolute pair, between the two not
There is axially opposing slip；
The reversing maneuver bar (4) is connected by gear pair with angular wheel (12)；
The period 1 property permanent magnet (6) is fixed in the bottom of work shape gear (3) lower end gear；
The Secondary periodicity permanent magnet (8) is fixed in the bottom of roller gear (9)；
The focusing control stick (2), work shape gear (3), roller gear (9) and angular wheel (12) constitute SH ripple focusing systems,
The reversing maneuver bar (4) and angular wheel (12) constitute SH ripple exchange systems.
2. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 1, it is characterised in that described
The upper end gear and lower end gear of work shape gear (3) are fixed together by jackshaft, reference radius of lower end gear etc.
In twice of the reference radius of upper end gear.
3. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 2, it is characterised in that affixed
In the number of teeth and reference radius that focus on control stick (2) gear, the respectively number of teeth with work shape gear (3) upper end gear and indexing
Radius of circle is equal.
4. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 2, it is characterised in that work shape
The number of teeth and reference radius of gear (3) lower end gear are equal with the number of teeth and reference radius of roller gear (9) respectively.
5. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 1, it is characterised in that described
Shell (1) internal cavities are in cylinder.
6. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 1, it is characterised in that described
Racetrack AC coil (7) is formed by flexible material printing, and two sections of semicircular conductor parts of coil are lifted by spring respectively
Bottom in angular wheel (12).
7. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 1, it is characterised in that also wrap
BNC connector (11) is included, crossed beam trunking is carved with shell (1), the wire (10) drawn from racetrack AC coil (7) is by mistake
Wire casing is connected with BNC connector (11)；BNC connector (11) is fixed on the side wall of shell (1).
8. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 1, it is characterised in that described
Control stick (2), work shape gear (3), reversing maneuver bar (4), roller gear (9) and angular wheel (12) are focused on by non-magnetic material
Material is made.
9. a kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating according to claim 1, it is characterised in that described
Period 1 property permanent magnet (6), Secondary periodicity permanent magnet (8) are elongated, magnet polarity interlaced arrangement along its length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611167811.6A CN107085042B (en) | 2016-12-16 | 2016-12-16 | A kind of SH wave electromagnet ultrasonic changers for focusing and commutating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611167811.6A CN107085042B (en) | 2016-12-16 | 2016-12-16 | A kind of SH wave electromagnet ultrasonic changers for focusing and commutating |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456256A (en) * | 1993-11-04 | 1995-10-10 | Ultra-Scan Corporation | High resolution ultrasonic imaging apparatus and method |
| JP2003319493A (en) * | 2002-04-26 | 2003-11-07 | Toyota Motor Corp | Electromagnetic acoustic transducer |
| CN101005717A (en) * | 2006-12-19 | 2007-07-25 | 刘铮 | Circular center focusing high power supersonic transducer |
| CN202393743U (en) * | 2011-08-30 | 2012-08-22 | 中国科学院金属研究所 | Integral transceiving switch type SH (shear horizontal) guide wave electromagnetic ultrasonic probe |
| CN103831227A (en) * | 2014-03-05 | 2014-06-04 | 北京工业大学 | Variable-wavelength low-order shear-horizontal-wave electromagnetic acoustic transducer |
| CN105510449A (en) * | 2016-01-22 | 2016-04-20 | 清华大学 | Electromagnetic ultrasonic transducer with variable emission angle range |
-
2016
- 2016-12-16 CN CN201611167811.6A patent/CN107085042B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456256A (en) * | 1993-11-04 | 1995-10-10 | Ultra-Scan Corporation | High resolution ultrasonic imaging apparatus and method |
| JP2003319493A (en) * | 2002-04-26 | 2003-11-07 | Toyota Motor Corp | Electromagnetic acoustic transducer |
| CN101005717A (en) * | 2006-12-19 | 2007-07-25 | 刘铮 | Circular center focusing high power supersonic transducer |
| CN202393743U (en) * | 2011-08-30 | 2012-08-22 | 中国科学院金属研究所 | Integral transceiving switch type SH (shear horizontal) guide wave electromagnetic ultrasonic probe |
| CN103831227A (en) * | 2014-03-05 | 2014-06-04 | 北京工业大学 | Variable-wavelength low-order shear-horizontal-wave electromagnetic acoustic transducer |
| CN105510449A (en) * | 2016-01-22 | 2016-04-20 | 清华大学 | Electromagnetic ultrasonic transducer with variable emission angle range |
Non-Patent Citations (4)
| Title |
|---|
| 《IEEE ULTRASONICS SYMPOSLUM》 * |
| 《INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS》 * |
| 《仪表技术与传感器》 * |
| 《测控技术》 * |
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