CN108593783A - A kind of double-frequency confocal ultrasonic transducer - Google Patents
A kind of double-frequency confocal ultrasonic transducer Download PDFInfo
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- CN108593783A CN108593783A CN201711134044.3A CN201711134044A CN108593783A CN 108593783 A CN108593783 A CN 108593783A CN 201711134044 A CN201711134044 A CN 201711134044A CN 108593783 A CN108593783 A CN 108593783A
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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
- 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
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Abstract
The invention discloses a kind of double-frequency confocal ultrasonic transducers, levied surely suitable for biological tissue, the regulation and control of organizational project mechanical property, the fields such as Ultrasonic NDT.Specifically include piezoelectric element, the back sheet with fluted column face, radio frequency pedestal and shell.Specifically there are following characteristics：(1) there are three independent piezoelectric element and corresponding radio frequency pedestals for tool；(2) piezoelectric element is piezoelectric membrane made of piezoelectric polymer polymer；(3) positive electrode is covered in piezoelectric membrane upper surface, and negative electrode is covered in lower surface；(4) piezoelectric membrane is fitted tightly on the fluted column face of back sheet；(5) positive electrode of piezoelectric membrane is connected by contact conductor with the anode of corresponding radio frequency pedestal, and the negative electrode of piezoelectric membrane is connected by contact conductor with the cathode of corresponding radio frequency pedestal.The present invention can generate the ultrasonic wave of two different frequencies, can realize the mechanical characteristic assessment to biological tissue, can also realize the anisotropic analysis to material.
Description
Technical field
The present invention relates to a kind of ultrasonic transducers, and in particular to a kind of double-frequency confocal ultrasonic transducer.The present invention is suitable for
The fields such as biological tissue levies surely, the regulation and control of organizational project mechanical property, Ultrasonic NDT.
Background technology
Low intensity ultrasound is as a kind of biophysics form, other than with mechanical effect, can also generate fuel factor
With unique cavity effect.Energy in ultrasound can generate the compressional wave of alternately variation in propagation medium, and molecular motion is made to increase
Add, causes the vibration of molecule and collision to increase, generate fuel factor.It is low strong since some enzymes are very sensitive to the minor change of temperature
The subtle fuel factor that degree ultrasound generates can still influence the activity of some enzymes.As a kind of pressure wave of alternately variation, ultrasonic wave can
To generate the tuftlet in stable lacuna and transmission tissue.The ultrasound for the treatment of intensity may generate shearing force on cell membrane, and
This effect may be directly changed gene expression by influencing cytoskeleton, they can also be logical by the cross-film on cell membrane
Road makes the transport of transmembrane ion and subsequent cell response change.These characteristics make the mechanical characteristic in organizational project
Ultrasound regulation and control are possibly realized.
Recent studies have shown that low-intensity ultrasonic is by accelerating Subchondral drilling and endochondral ossification, and then can be effective
Promote union.Animal experiment study also confirms that low intensity pulsed ultrasound, which has, promotes joint bone-cartilage defect repair
Effect.In addition, low intensity pulsed ultrasound can maintain the high-level table of II Collagen Type VIs and proteoglycans mRNA in cartilage cell
It reaches, and postpones the expression of X-type collagen mrna, can also be obviously promoted the expression of transforming growth factor TGF-β with protein product
Increase.
It is limited to existing ultrasonic transducer, the ultrasound regulation and control experiment of organizational project is only capable of using single-frequency ultrasound simultaneously
Wave or burst pulse ultrasonic wave carry out ultrasound stimulation, can not load the acoustic stimulation of multiple frequencies simultaneously.On the other hand, existing
Ultrasound regulation and control experiment cannot achieve to implementing targetedly to quantify acoustic stimulation on certain depth, specific direction.Therefore, having must
A kind of ultrasonic transducer is developed, the double frequency alternation ultrasonic radiation field of force of space directivity can be provided with.
In repair of cartilage field, migration process requires the engineered cartilage of in vitro culture to have certain mechanical strength.Finland
Lyyra et al. has developed the device assessed for cartilage mechanical characteristic.The device makes cartilage generate fixed shape by coining head
Become, the stress of coining head is measured by foil gauge, and then analyzes the stress response of cartilage to measure the hardness of cartilage.But it detects
The contact force of process and deformation will result in the damage of contact surface cartilage cell and withered.Therefore, it is also desirable to which one kind is suitable for soft
Mechanical characteristics nondestructive evaluation means during bone tissue culture, and ultrasound is closely bound up with mechanical characteristic, is considered as most probable
Technology Ways.
The present invention passes through the innovations such as three independent piezoelectric membranes and corresponding fluted column face back sheet towards the demand
Design, develops a kind of double-frequency confocal ultrasonic transducer.There is the acoustic radiation field of force of directive property to training by what the energy converter generated
Tissue special area implementation targetedly regulates and controls, to realize the tune to engineered tissue partial structurtes or Micromechanics characteristic
Control.
Invention content
The purpose of the present invention is the ultrasonic quantitatives for organizational project to regulate and control, the mechanical characteristic in cartilaginous tissue incubation
The occasions such as evaluation quantity design a kind of double frequency alternation being capable of providing space directivity to the application demand of particular ultrasound transducer
The double-frequency confocal ultrasonic transducer in the ultrasonic radiation field of force.The energy converter has multiple-working mode simultaneously, and it is soft can to complete engineering
The organization mechanics characteristic-nondestructive of bone is assessed.
In order to achieve the above objectives, the present invention, which adopts the following technical scheme that, is resolved：
A kind of double-frequency confocal ultrasonic transducer, including piezoelectric element, back sheet, preposition matching layer, radio frequency pedestal, electrode draw
Line, shell and packing material specifically have following feature：
1. piezoelectric element is piezoelectric membrane made of piezoelectric polymer polymer；
2. there are three independent piezoelectric membrane, three independent back sheets and three independent radio frequency pedestals for tool；Three
Independent back sheet has fluted column face, and fluted column face cylindrical radius having the same；Three independent piezoelectric membranes are close
It is fitted on the fluted column face of corresponding back sheet；Any one piezoelectric membrane and its corresponding back sheet and radio frequency pedestal composition are independent
Ultrasound emission module, independent ultrasonic sound field can be generated, and the ultrasonic sound field generated is line focus sound field；
3. positive electrode is covered in piezoelectric membrane upper surface, negative electrode is covered in lower surface；The positive electrode of piezoelectric membrane passes through electrode
Lead and the anode of corresponding radio frequency pedestal are connected, the cathode that the negative electrode of piezoelectric membrane passes through contact conductor and corresponding radio frequency pedestal
It is connected.
4. enclosure interior remaining space is filled using packing material.
The piezoelectric membrane includes the copolymer p (VDF- of polyvinylidene fluoride PVDF piezoelectric membranes, PVDF and trifluoro-ethylene
TrFE) copolymer p (VDF-TeFE) piezoelectric membrane of piezoelectric membrane, PVDF and tetrafluoroethene.
The angle of two back sheet structures having the same, fluted column face is less than 90 degree；The knot of a remaining back sheet
Center line of the structure along cylindrical surface is symmetrical, and the angle in fluted column face is less than 90 degree；The sum of the angle in three back sheet fluted column faces
Less than 180 degree.
Three independent back sheets are spatially arranged symmetrically, and two there is mutually isostructural back sheet to be arranged symmetrically in residue
The left and right sides of one back sheet, and ensure the cylinder axis in three fluted column faces point-blank.
The length of piezoelectric membrane is consistent with the length in corresponding back sheet fluted column face, the width of piezoelectric membrane and corresponding backing
The arc length in layer fluted column face is consistent.
The acoustic impedance of preposition matching layer material and the acoustic impedance of piezoelectric membrane are close；The thickness of preposition matching layer is equal to ultrasound
The a quarter of ultrasonic wavelength under basic frequency.
Preposition matching layer is film made of polymer composite, and selected polymer composite includes：Polyethylene,
Polypropylene, polytetrafluoroethylene (PTFE), makrolon, polyester.
There is the energy converter ultrasonic excitation sound emission, internal loopback, one receipts of a hair, double hairs one to receive four kinds of operating modes.
The ultrasonic excitation sound emission pattern is realized as follows：Intermediate piezoelectric element tranmitting frequency is the ultrasonic wave of f, two
The piezoelectric element tranmitting frequency of side is the ultrasonic wave of f+ Δs f, and the ultrasonic wave of two kinds of different frequencies inspires frequency in focal position
For the sound wave of Δ f, sensor or other acoustic transducer arrangements is listened to acquire the sound wave using water；Based on the sound wave, analysis waits for test sample
The material property of product.
The internal loopback operating mode is realized as follows：Any one piezoelectric element can be used as transmitter, to piezoelectricity
Element applies a pulse excitation, can emit a pulse ultrasonic wave outward；The pulse ultrasonic wave emitted is through sample to be tested
After transmitting, received by the piezoelectric element；Based on reflecting ultrasonic wave, the material property of sample to be tested is analyzed.
The described hair one knock off operation mode realize it is as follows：Piezoelectric element at left and right sides of use, side as transmitter,
The other side is as receiver；One pulse excitation is applied to transmitter, emits a pulse ultrasonic wave outward；The pulse emitted
Ultrasonic wave is received after sample to be tested emits by receiver；Based on reflecting ultrasonic wave for receiver capture, sample to be tested is analyzed
Material property；Double hairs one knock off operation mode realize it is as follows：Piezoelectric element at left and right sides of using is intermediate as transmitter
Piezoelectric element as receiver.
The present invention having the beneficial effect that compared with the existing technology：
First, the present invention can provide the double frequency alternation ultrasonic radiation field of force with space directivity, change previous tissue
The case where ultrasound regulation and control experiment is only capable of using single-frequency ultrasonic wave or pulse ultrasonic wave in engineering；Second, it is provided by the invention
Double-frequency confocal ultrasonic transducer has multiple-working mode, both can be used for mechanical property regulation and control, and can be used for mechanical property
Nondestructive evaluation, can significant increase tissue culture device quality control capability.
Description of the drawings
Fig. 1 is the ultrasonic transducer structures schematic diagram of the embodiment of the present invention；
Fig. 2 is the application framework figure of the ultrasonic excitation sound emission operating mode of the embodiment of the present invention；
Fig. 3 is the application method figure of the internal loopback operating mode of the embodiment of the present invention；
Fig. 4 is the application method figure that a hair one of the embodiment of the present invention knocks off operation mode；
Fig. 5 is that double hairs one of the embodiment of the present invention are knocked off the application method figure of operation mode.
Specific implementation mode
The present invention is illustrated with reference to the accompanying drawings and examples.
As shown in Figs. 1-5, the embodiment of the present invention is related to a kind of double-frequency confocal ultrasonic transducer, has ultrasonic excitation sound hair
Penetrate, internal loopback, one hair one receive, it is double hair one receive etc. four kinds of operating modes, can be used for biological tissue levy surely, organizational project mechanical property
The fields such as energy regulation and control, Ultrasonic NDT.
As shown in Figure 1, a kind of structure of double-frequency confocal ultrasonic transducer, including piezoelectric element, back sheet, preposition matching
Layer, radio frequency pedestal, contact conductor, shell and packing material.
In the present embodiment, shell 101 is made of electrically non-conductive material, is the length of a length, width and height 24mm × 20mm × 20mm
Cube, up and down, wall thickness 1.5mm is furnished with shell cover to short transverse.The lower section of shell 101 is processed as cylindrical surface along its length,
Cylindrical radius is 15mm, and the angle of circular arc is 65 degree.
In the present embodiment, there are three independent piezoelectric elements, i.e. right side PVDF pressures for the double-frequency confocal ultrasonic transducer tool
Conductive film 102, centre PVDF piezoelectric membranes 104, left side PVDF piezoelectric membranes 106.It is covered with aluminium electrode above PVDF piezoelectric membranes
Film (anode), lower section are covered with aluminium electrode films (cathode).There are three independent backings for the double-frequency confocal ultrasonic transducer tool
Layer, i.e. right side backing block 103, intermediate backing block 105, left dorsal pad 107.Right side backing block 103 and left dorsal pad 107 have
There are identical structure, bottom to be machined with fluted column face, arc angle is 16 degree.The bottom of intermediate backing block 105 is machined with symmetrically
Fluted column face, arc angle be 20 degree.Right side backing block 103, intermediate backing block 105 and 107 bottom of left dorsal pad it is recessed
The cylindrical radius on cylindrical surface is identical, is 16mm.
The procedure of processing of right side backing block 103, intermediate backing block 105 and left dorsal pad 107 is：Process a length, width and height
Be the square of 16mm, bottom process an arc angle be 60 degree, the fluted column face that cylindrical radius is 16mm, use cutting
Equipment is cut into three backing blocks for meeting angle requirement.
Right side PVDF piezoelectric membranes 102 are fitted tightly over right side backing block 103 using epoxy resin hybrid conductive elargol
Fluted column face on.Likewise, intermediate PVDF piezoelectric membranes 104 are fitted tightly on the fluted column face of intermediate backing block 105,
Left side PVDF piezoelectric membranes 104 are fitted tightly on the fluted column face of left dorsal pad 105.Epoxy resin hybrid conductive elargol
Coating layer thickness control PVDF piezoelectric membrane thickness half or so.The length of PVDF piezoelectric membranes and corresponding backing block
Length it is identical, be 16mm.The width of PVDF piezoelectric membranes is slightly longer than the border width of corresponding backing block bottom.The present embodiment
In, the width of intermediate PVDF piezoelectric membranes 104 is 7mm, right side PVDF piezoelectric membranes 102 and left side PVDF piezoelectric membranes 106
Width is 8mm.
The left side of right side PVDF piezoelectric membranes 102 is flushed with the left side of right side backing block 103.Right side PVDF piezoelectric membranes
102 be more than that the part of the right side edge of right side backing block 103 is fitted in using conductive silver glue in the right wall of right side backing block 103.
A conductive path is smeared out in the right wall of right side backing block 103 and upper surface using conductive silver glue, and passes through right side positive wire
116 are connected with the anode of right side radio frequency pedestal 108.Using adhesive copper foil and conductive silver glue by right side PVDF piezoelectric membranes
102 aluminium electrode films (cathode) are bonded with right side negative wire 117, and the position of bonding is on the right side of right side backing block 103
On wall.Right side negative wire 117 is connected with the cathode of right side radio frequency pedestal 108.Identical method, by left side piezoelectric membrane
The positive phase that 106 aluminium electrode films (anode) pass through conductive silver glue and left side positive wire 120 and left side radio frequency pedestal 110
Even, the aluminium electrode films (cathode) of left side piezoelectric membrane 106 are passed through into conductive silver glue and left side positive wire 121 and left side radio frequency
The cathode of pedestal 110 is connected.The aluminium electrode films (anode) of intermediate piezoelectric membrane 104 are passed through conductive silver glue by identical method
It is connected with intermediate positive wire 118 with the anode of intermediate RF pedestal 109, the aluminium electrode films of intermediate piezoelectric membrane 104 are (negative
Pole) it is connected with the cathode of intermediate RF pedestal 109 with intermediate positive wire 119 by conductive silver glue.
Preposition matching layer 112 is fitted in using quick glue on three independent piezoelectric membranes 102,104 and 106.This
In embodiment, using 40 microns of thick films made of polyester material as preposition matching layer.
The remaining space of enclosure is filled using packing material 122, and preferred packing material is ethylene-in the present embodiment
Acetate ethylene copolymer.It is fixed by left side sunk screw 115 and right side sunk screw 114 between shell and shell cover.Institute
It has the gap and is smeared using water-proof silica-gel, to ensure that probe can use in water.
Fig. 2 shows double-frequency confocal ultrasonic transducer that the present embodiment is provided in ultrasonic excitation sound emission operating mode
Application framework.Under this pattern, intermediate piezoelectric element tranmitting frequency is the continuous ultrasonic of f, the piezoelectric element hair of the left and right sides
Radio frequency rate is the continuous ultrasonic of f+ Δs f, and the ultrasonic wave of two kinds of different frequencies inspires the sound that frequency is Δ f in focal position
Wave listens sensor to acquire the sound wave using water.Based on the operating mode, the double frequency alternation ultrasonic radiation field of force can be generated.
Whole system is responsible for master control by a computer 207.Double-frequency confocal ultrasonic transducer 201 is fixed by fixture 211
On XYZ triaxial movement platforms 212, and can under the control of motion controller 206 around, upper inferior direction carries out
The movement of micron accuracy.Signal controller 204 is responsible for signal transmitting action and the frequency of control signal source 202 and signal source 203.
Signal source 202 is connected by intermediate RF pedestal 109 with double-frequency confocal ultrasonic transducer 201, and it is the continuous super of f to generate frequency
Sound wave.Signal source 203 passes through left side radio frequency pedestal 110 and right side radio frequency pedestal 108 and 201 phase of double-frequency confocal ultrasonic transducer
Even, and the continuous ultrasonic that frequency is f+ Δs f is generated.Sample 209 to be regulated and controled is placed in a rule container 210.Emitted
Ultrasonic wave generates acoustic emission phenomenon in the corresponding position of sample 209 to be regulated and controled, and radiation frequency is the sound wave of Δ f outward.It is sent out
The frequency penetrated is captured by the sound wave of Δ f by hydrophone 208, and is converted into digital quantity by AD samplers 205 and is entered computer
207。
Fig. 3 shows that the double-frequency confocal ultrasonic transducer 201 that the present embodiment is provided makes in internal loopback operating mode
Use method.A piezoelectric element is used only in this mode can be used as transmitter, apply a pulse excitation, Ke Yixiang to it
One pulse ultrasonic wave of outer transmitting.The pulse ultrasonic wave emitted is received after sample to be tested emits by the piezoelectric element.It is based on
It reflects ultrasonic wave, analyzes the material property of sample to be tested.Preferable scheme is that using intermediate piezoelectric element as transmitter, signal
Emitter 301 is connected by intermediate RF pedestal 109 with double-frequency confocal ultrasonic transducer 201, and applies pulse excitation.Double frequency is total
The pulse ultrasonic wave that burnt ultrasonic transducer 201 generates reflects on the surface of sample to be tested 209 or internal generate, the ultrasonic wave of reflection
It is received by intermediate piezoelectric element, and is obtained by computer by signal receiver 302.
Fig. 4 shows that double-frequency confocal ultrasonic transducer that the present embodiment is provided is knocked off the user of operation mode in a hair one
Method.In the present embodiment, signal emitter 301 is connected by left side radio frequency pedestal 110 with double-frequency confocal ultrasonic transducer 201,
Signal receiver 302 is connected by right side radio frequency pedestal 108 with double-frequency confocal ultrasonic transducer 201.Signal emitter 301 applies
Pulse excitation, pulse ultrasonic wave 401 caused by left piezoelectric element the surface of sample to be tested 209 or it is internal generate reflection,
The ultrasonic wave 402 of reflection is received by the piezoelectric element on right side, and is obtained by computer by signal receiver 302.
Double hairs one are knocked off operation mode, it is characterised in that：Piezoelectric element at left and right sides of using as transmitter, in
Between piezoelectric element as receiver.
Fig. 5 shows that double-frequency confocal ultrasonic transducer that the present embodiment is provided is knocked off the user of operation mode in double hairs one
Method.In the present embodiment, double one operation modes of knocking off of hair also will produce acoustic emission phenomenon.Signal receiver 301 passes through intermediate RF base
Seat 109 is connected with double-frequency confocal ultrasonic transducer 201.Signal source 203 is changed by left side radio frequency pedestal with double-frequency confocal ultrasound
Energy device 201 is connected, and controls left piezoelectric element and generate the continuous ultrasonic 501 that frequency is f+ Δs f.Signal source 202 passes through the right side
Side radio frequency pedestal is connected with double-frequency confocal ultrasonic transducer 201, and controls right side piezoelectric element and generate the continuous ultrasound that frequency is f
Wave 502.The ultrasonic wave 501 and 502 emitted generates acoustic emission phenomenon in the corresponding position of sample to be tested 209, and to external radiation
Frequency is the sound wave 503 of Δ f.The sound wave 503 radiated is captured by intermediate piezoelectric element, and passes through 301 quilt of signal receiver
Computer obtains.Other configurations under the operating mode are identical as in Fig. 2.
Above-mentioned embodiment is only a preferred solution of the present invention, so it is not intended to limiting the invention.Have
The those of ordinary skill for closing technical field can also make various changes without departing from the spirit and scope of the present invention
Change and modification.Therefore all technical solutions for taking the mode of equivalent substitution or equivalent transformation to be obtained all fall within the guarantor of the present invention
It protects in range.
Claims (10)
1. a kind of double-frequency confocal ultrasonic transducer, including piezoelectric element, back sheet, preposition matching layer, radio frequency pedestal, electrode draw
Line, shell and packing material, it is characterised in that：
1. piezoelectric element is piezoelectric membrane made of piezoelectric polymer polymer；
2. there are three independent piezoelectric membrane, three independent back sheets and three independent radio frequency pedestals for tool；Three independences
Back sheet there is fluted column face, and fluted column face cylindrical radius having the same；Three independent piezoelectric membranes fit closely
On the fluted column face of corresponding back sheet；Any one piezoelectric membrane and its corresponding back sheet and radio frequency pedestal composition are independent super
Sound emission module can generate independent ultrasonic sound field, and the ultrasonic sound field generated is line focus sound field；
3. positive electrode is covered in piezoelectric membrane upper surface, negative electrode is covered in lower surface；The positive electrode of piezoelectric membrane passes through contact conductor
It is connected with the anode of corresponding radio frequency pedestal, the cathode phase that the negative electrode of piezoelectric membrane passes through contact conductor and corresponding radio frequency pedestal
Even；
4. enclosure interior remaining space is filled using packing material.
2. double-frequency confocal ultrasonic transducer as described in claim 1, it is characterised in that：The piezoelectric membrane includes gathering inclined difluoro
Copolymer p (VDF-TrFE) piezoelectric membrane of ethylene PVDF piezoelectric membranes, PVDF and trifluoro-ethylene, PVDF and tetrafluoroethene are total to
Polymers P (VDF-TeFE) piezoelectric membrane.
3. double-frequency confocal ultrasonic transducer as described in claim 1, it is characterised in that：Two back sheet knots having the same
The angle of structure, fluted column face is less than 90 degree；Center line of the structure of a remaining back sheet along cylindrical surface is symmetrical, fluted column
The angle in face is less than 90 degree；The sum of the angle in three back sheet fluted column faces is less than 180 degree.
4. double-frequency confocal ultrasonic transducer as claimed in claim 3, it is characterised in that：Three independent back sheets are spatially right
Claim arrangement, two are arranged symmetrically in the left and right sides of a remaining back sheet with mutually isostructural back sheet, and ensure three
The cylinder axis in fluted column face is point-blank.
5. double-frequency confocal ultrasonic transducer as described in claim 1, it is characterised in that：The length of piezoelectric membrane and corresponding backing
The length in layer fluted column face is consistent, and the width of piezoelectric membrane is consistent with the arc length in corresponding back sheet fluted column face.
6. double-frequency confocal ultrasonic transducer as described in claim 1, it is characterised in that：It is preposition matching layer material acoustic impedance with
The acoustic impedance of piezoelectric membrane is close；The thickness of preposition matching layer is equal to a quarter of ultrasonic wavelength under ultrasonic basic frequency；Before
It is film made of polymer composite to set matching layer, and selected polymer composite includes：Polyethylene, gathers polypropylene
Tetrafluoroethene, makrolon, polyester.
7. double-frequency confocal ultrasonic transducer as described in claim 1, it is characterised in that：The energy converter is sent out with ultrasonic excitation sound
It penetrates, internal loopback, a hair one are received, double hairs one receive four kinds of operating modes.
8. double-frequency confocal ultrasonic transducer as claimed in claim 7, it is characterised in that the ultrasonic excitation sound emission pattern
It realizes as follows：Intermediate piezoelectric element tranmitting frequency is the ultrasonic wave of f, and the piezoelectric element tranmitting frequency of both sides is the super of f+ Δs f
Sound wave, the ultrasonic waves of two kinds of different frequencies inspire the sound wave that frequency is Δ f in focal position, using water listen sensor or other
Acoustic transducer arrangement acquires the sound wave；Based on the sound wave, the material property of sample to be tested is analyzed.
9. double-frequency confocal ultrasonic transducer as claimed in claim 7, it is characterised in that the internal loopback operating mode is real
It is now as follows：Any one piezoelectric element can be used as transmitter, apply a pulse excitation to piezoelectric element, can emit outward
One pulse ultrasonic wave；The pulse ultrasonic wave emitted is received after sample to be tested emits by the piezoelectric element；It is super based on reflection
Sound wave analyzes the material property of sample to be tested.
10. double-frequency confocal ultrasonic transducer as claimed in claim 7, it is characterised in that the described hair one is knocked off operation mode reality
It is now as follows：Piezoelectric element at left and right sides of use, side is as transmitter, and the other side is as receiver；One is applied to transmitter
A pulse excitation emits a pulse ultrasonic wave outward；The pulse ultrasonic wave emitted is after sample to be tested emits, by receiver
It receives；Based on reflecting ultrasonic wave for receiver capture, the material property of sample to be tested is analyzed；Double hairs one are knocked off operation mode
It realizes as follows：Piezoelectric element at left and right sides of using is as transmitter, and intermediate piezoelectric element is as receiver.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044618A (en) * | 2019-12-05 | 2020-04-21 | 西安理工大学 | Piezoelectric sensor for detecting acoustic emission signals and preparation method of piezoelectric film |
| CN112414601A (en) * | 2020-11-18 | 2021-02-26 | 北京理工大学 | Wide frequency ultrasonic transducer |
| CN114129189A (en) * | 2021-11-30 | 2022-03-04 | 深圳先进技术研究院 | Dual-frequency intravascular ultrasonic transducer, and method and device for calculating Young modulus of vascular wall |
| CN114587417A (en) * | 2021-11-26 | 2022-06-07 | 深圳先进技术研究院 | Catheter sheath and imaging device |
| WO2022228044A1 (en) * | 2021-04-30 | 2022-11-03 | 微创视神医疗科技(上海)有限公司 | Ultrasonic emulsifier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034982Y (en) * | 2007-04-27 | 2008-03-12 | 北京工业大学 | Double-layer PVDF piezoelectric thin film line focusing ultrasound probe |
| US20120267986A1 (en) * | 2009-06-19 | 2012-10-25 | Sonovia Holdings Llc | Dual-frequency ultrasound transducer |
| CN103041978A (en) * | 2013-01-23 | 2013-04-17 | 中国科学院上海硅酸盐研究所 | Focusing ultrasonic transducer and producing method thereof |
| CN104225810A (en) * | 2014-09-09 | 2014-12-24 | 西安交通大学 | Ultrasonic mechanical damage and thermal coagulation device and method based on double-frequency con-focal ultrasonic time-sharing excitation |
| CN105903667A (en) * | 2016-05-10 | 2016-08-31 | 广州佰奥廷电子科技有限公司 | Dual-frequency hollow focused ultrasonic detector |
-
2017
- 2017-11-16 CN CN201711134044.3A patent/CN108593783B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034982Y (en) * | 2007-04-27 | 2008-03-12 | 北京工业大学 | Double-layer PVDF piezoelectric thin film line focusing ultrasound probe |
| US20120267986A1 (en) * | 2009-06-19 | 2012-10-25 | Sonovia Holdings Llc | Dual-frequency ultrasound transducer |
| CN103041978A (en) * | 2013-01-23 | 2013-04-17 | 中国科学院上海硅酸盐研究所 | Focusing ultrasonic transducer and producing method thereof |
| CN104225810A (en) * | 2014-09-09 | 2014-12-24 | 西安交通大学 | Ultrasonic mechanical damage and thermal coagulation device and method based on double-frequency con-focal ultrasonic time-sharing excitation |
| CN105903667A (en) * | 2016-05-10 | 2016-08-31 | 广州佰奥廷电子科技有限公司 | Dual-frequency hollow focused ultrasonic detector |
Non-Patent Citations (1)
| Title |
|---|
| 何培忠: "生物组织中的超声激发声发射（USAE）及其医学应用研究", 《中国优秀博硕士学位论文全文数据库（博士） 医药卫生科技辑（月刊）》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044618A (en) * | 2019-12-05 | 2020-04-21 | 西安理工大学 | Piezoelectric sensor for detecting acoustic emission signals and preparation method of piezoelectric film |
| CN112414601A (en) * | 2020-11-18 | 2021-02-26 | 北京理工大学 | Wide frequency ultrasonic transducer |
| WO2022228044A1 (en) * | 2021-04-30 | 2022-11-03 | 微创视神医疗科技(上海)有限公司 | Ultrasonic emulsifier |
| CN114587417A (en) * | 2021-11-26 | 2022-06-07 | 深圳先进技术研究院 | Catheter sheath and imaging device |
| CN114129189A (en) * | 2021-11-30 | 2022-03-04 | 深圳先进技术研究院 | Dual-frequency intravascular ultrasonic transducer, and method and device for calculating Young modulus of vascular wall |
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