CN107716258B - Amplitude regulates and controls uniform field ring battle array ultrasonic transducer - Google Patents
Amplitude regulates and controls uniform field ring battle array ultrasonic transducer Download PDFInfo
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- CN107716258B CN107716258B CN201711177891.8A CN201711177891A CN107716258B CN 107716258 B CN107716258 B CN 107716258B CN 201711177891 A CN201711177891 A CN 201711177891A CN 107716258 B CN107716258 B CN 107716258B
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- 229920005989 resin Polymers 0.000 claims abstract description 4
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- 238000002604 ultrasonography Methods 0.000 abstract description 8
- 230000033228 biological regulation Effects 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000002560 therapeutic procedure Methods 0.000 description 4
- 238000002512 chemotherapy Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013098 chemical test method Methods 0.000 description 1
- 238000011281 clinical therapy Methods 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000554 physical therapy Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
- B06B1/0625—Annular array
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/76—Medical, dental
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
Amplitude regulates and controls uniform sound field ring battle array ultrasonic transducer, belongs to ultrasound transducer design technical field.The present invention is to influence Experimental Ultrasonic result in order to which the sound field intensity for solving the problem of ultrasonic transducer near field is uneven.It includes a burst of member of N number of ring and N-1 adjustable resistance, and N number of a burst of member of ring passes sequentially through resin from inside to outside and is socketed to form a disk；The a burst of first ecto-entad of N number of ring is successively ordered as 0,1,2 ... ..., N-1, wherein the 1st, 2,3 ... ..., a burst of member of N-1 ring adjustable resistance of connecting respectively is connect after a burst of member parallel connection of N number of ring with single channel driving power；Regulate and control the amplitude of a burst of member of respective rings by adjusting the resistance value of each adjustable resistance, to adjust the sound field intensity distribution of energy converter near-field region.The present invention can eliminate the uneven field strength spatial distribution state in energy converter near field.
Description
Technical field
The present invention relates to amplitudes to regulate and control uniform sound field ring battle array ultrasonic transducer, belongs to ultrasound transducer design technical field.
Background technique
Ultrasonic wave is widely used in biology, medical domain and chemical synthesis, especially in medical clinic applications and
In treatment, due to the non-invasive of it, high-resolution and advantage that is cheap, and having other methods matchless.Ultrasound is changed
Energy device (also referred to as ultrasonic probe) is electroacoustic signal switching device, can issue sound wave under electric signal driving, then the sound received
Signal is converted into electric signal.
The surface of emission of general cell ultrasonic probe is mostly circular flat, and the sound field of sending can be divided into three regions along axial:
Near field, focus and far field.The position L of focus are as follows: L=d2/ 4 λ, wherein d is probe surface of emission diameter, and λ is that sound wave is propagating matchmaker
Wavelength in Jie.When frequency is fixed, the diameter of energy converter is bigger, then focus is remoter.Fig. 3 is that general circular flat emits transducing
The sound field spatial distribution two-dimensional representation of device, its actual three-dimensional sound field are the rotation figures using center as axle center.As shown in Figure 7,
Region between the energy converter surface of emission and focus is referred to as near field, in general, the more area in the energy converter of large area then near field
Domain is bigger, and the field strength distribution of sound wave is extremely uneven in near-field region.As it can be seen that its near field is in a mess, along axial acoustic pressure with space
Variation is very big, and overall distribution is very uneven.Since cell ware has certain scale, energy converter is needed to have certain area,
So general cell Experimental Ultrasonic be all energy converter near field, and the inhomogeneities near field result in it is many using super at present
The biomedicine experiment data of sound are unreliable, and repetitive rate is low.For example, external sound dynamic experiment result cell mortality is less than
40%, and reinforcing ultrasound intensity can not all kill cell.This is because being in different spaces in cell ware under near field
The cell of position ultrasound intensity obtained differs greatly from, some places may not experience the sound intensity completely, causes total
Effect is undesirable.Reach the intensity of sound field in a certain range of space uniformly, be one can directly affect it is super
The critical issue of sound experimental result.
Summary of the invention
It is uneven the invention aims to solve the sound field intensity in ultrasonic transducer near field, influence Experimental Ultrasonic result
Problem provides a kind of amplitude regulation uniform field ring battle array ultrasonic transducer.
Amplitude of the present invention regulation uniform field ring battle array ultrasonic transducer includes a burst of member of N number of ring and N-1 adjustable resistance,
N number of a burst of member of ring passes sequentially through resin from inside to outside and is socketed to form a disk；The a burst of first ecto-entad of N number of ring is successively sorted
It is 0,1,2 ... ..., N-1, wherein the 1st, 2,3 ... ..., a burst of member of N-1 ring is connected an adjustable resistance respectively, by N number of ring battle array
After array element is in parallel, it is connect with single channel driving power；Regulate and control a burst of member of respective rings by adjusting the resistance value of each adjustable resistance
Amplitude, thus adjust energy converter near-field region sound field intensity distribution.
Advantages of the present invention: the present invention eliminates energy converter near field by the amplitude of regulation surface of ultrasonic transducer to reach
The uneven field strength spatial distribution of extreme situation, it connects a burst of member of ring with adjustable resistance, is then parallel to a single channel
Driving power on, keep the phase of all array elements identical but amplitude is different, the Strength Space distribution of generated sound field is basic
The difference of near field and focus is eliminated, more uniform sound can be generated in the certain space region near energy converter emitting surface
?.
The present invention can generate equally distributed transmitting sound field, and this uniform sound field is all non-in biomedical and chemical field
It is often important, it is directly related to the reliability of experimental result.Especially in all kinds of methods for carrying out clinical medicine treatment with ultrasound
In, such as sound dynamic therapy, ultrasonic therapy, ultrasonic physical therapy and ultrasonic wave added chemotherapy, therapeutic effect can be directly influenced.
Uniform near field ring array transducer of the invention can also be used in the In vitroandin vivotrial of biology, medicine and chemical field.
Detailed description of the invention
Fig. 1 is the driving circuit structure schematic diagram of amplitude regulation uniform field ring battle array ultrasonic transducer of the present invention；
Fig. 2 is a burst of first arrangement schematic diagram of ring of amplitude regulation uniform field ring battle array ultrasonic transducer；
Fig. 3 is the sound field spatial distribution two dimension that the conventional ultrasonic transducer of existing circular flat issues under equal voltages driving
Schematic diagram；
Fig. 4 is the transducer acoustic field spatial distribution two-dimensional representation that amplitude is regulated and controled by cosine function mode；
Fig. 5 is the transducer acoustic field spatial distribution two-dimensional representation that amplitude is regulated and controled by Gaussian function mode；
Fig. 6 is the transducer acoustic field spatial distribution two-dimensional representation that amplitude is regulated and controled by linear function mode；
Fig. 7 is the transducer acoustic field spatial distribution two-dimensional representation that amplitude is regulated and controled by radical sign function fashion；Fig. 3 into Fig. 7,
The legend on figure right side is the explanation of field strength.
Specific embodiment
Present embodiment is illustrated below with reference to Fig. 1, Fig. 2, Fig. 4 to Fig. 7, the regulation of amplitude described in present embodiment is uniform
Ring battle array ultrasonic transducer, it include a burst of member a of N number of ring and N-1 adjustable resistance b, N number of a burst of member a of ring from inside to outside successively
It is socketed to form a disk by resin；The a burst of member a ecto-entad of N number of ring is successively ordered as 0,1,2 ... ..., N-1, wherein
The a burst of member a of 1st, 2,3 ... ..., N-1 rings connects an adjustable resistance b respectively, by a burst of member a of N number of ring it is in parallel after, with single-pass
The connection of road driving power；Regulate and control the amplitude of a burst of member of respective rings by adjusting the resistance value of each adjustable resistance b, is changed to adjust
The sound field intensity distribution of energy device near-field region.
In present embodiment, it is connect after N number of a burst of member a of ring is in parallel with the same driving power；It is each adjustable by adjusting
The resistance value of resistance b regulates and controls the concrete form of the amplitude of a burst of member a of respective rings, can be the uniform vibration with conventional ultrasound transducer
The different diversified forms of width form.As long as being made by the amplitude of regulation energy converter sound generating surface in near-field region a certain range
It is interior that the amplitude control methods of relatively uniform sound field are provided, it is all satisfied the requirement of the disclosure.
In the disclosure, it is grounded after the side of a burst of member a of N number of ring being connect with the other side of the 0th a burst of member of ring, the
Another side surface of a burst of member a of 1,2,3 ... ..., N-1 rings is separately connected the sliding end of an adjustable resistance b, all adjustable electrics
One end ground connection of b is hindered, the other end of all adjustable resistance b connects the anode of driving power simultaneously.
The a burst of member a of ring is made out of a piezoelectric material, and such as can be PZT piezoelectric ceramics or monocrystalline piezoelectric material, ring is a burst of
The upper and lower surface of first a is electrode surface, and epoxy resin is filled between two neighboring array element to guarantee to insulate.
For example, a burst of first ecto-entad of N number of ring can sequentially be sorted, shown in Fig. 1 and Fig. 2 wherein the 0th a burst of member of ring
It can not be connect with adjustable resistance b, other a burst of members of ring respectively connect an adjustable resistance b.Its circuit structure is single channel driving
Circuit.N number of a burst of member of ring sequentially can also sort and number from inside to outside, then the N-1 a burst of member of ring does not connect with adjustable resistance b
It connects.
The amplitude regulative mode of a burst of member of ring, which may is that, successively regulates and controls a burst of member of each ring according to the form of cosine function
Amplitude, and keep the amplitude of the N-1 a burst of member of ring maximum.The concrete form of cosine function cosine is Acos (r pi/2 R), wherein
A is amplitude, and r is distance of a burst of member of ring apart from energy converter center, the surface radius of R energy converter entirety.
The amplitude regulative mode of a burst of member of ring, which may also is that, successively regulates and controls a burst of member of each ring according to the form of Gaussian function
Amplitude, and keep the amplitude of the N-1 a burst of member of ring maximum.The concrete form of Gaussian function is Aexp (r2/c2), wherein c is one
Given constant.
The amplitude regulative mode of a burst of member of ring may also is that successively to regulate and control each ring according to the form of power exponential function a burst of
The amplitude of member, and keep the amplitude of the N-1 a burst of member of ring maximum.The concrete form of power exponential function is A ((r-R)/R)α, α is
Score, 0 < α < 1.
The amplitude regulative mode of a burst of member of ring, which may also is that, successively regulates and controls each ring battle array according to the form of linear decline function
The amplitude of array element, and keep the amplitude of the N-1 a burst of member of ring maximum.The concrete form of linear decline function is A (R-r)/R.
In actual use, it is not limited to the above-mentioned function enumerated, selects suitable amplitude regulation side according to specific needs
Formula.The amplitude for making the N-1 a burst of member of ring is maximum, as makes the amplitude of a burst of member of ring in disc centre maximum.
In the disclosure, do not change the phase of each array element, only its amplitude is regulated and controled, the number of array element is more, more
The function type distribution of amplitudes of design can be represented, but array element is excessive, will increase the preparation difficulty of ring battle array, so in actual design
In, need to consider that cost and performance optimizes.
The number of a burst of member of ring can choose as more than or equal to 3, i.e. N > 2, and N is integer, that is to say, that
The minimum value of N is 3.Such as N=8 may be selected, as depicted in figs. 1 and 2.
Fig. 4 is into Fig. 7, by taking the design of 8 a burst of members of ring as an example, gives and carries out amplitude by functional form described in the disclosure
The sound-filed simulation figure of regulation.
In Fig. 4, the sound field that amplitude is regulated and controled by cosine function is illustrated, the inhomogeneities near field substantially eliminates, especially
Sound field close to transducer face becomes very uniformly along axial direction, intermediate stronger, and radially gentle decline.Its actual three dimensional sound
Field is the rotation figure using center as axle center.
In Fig. 5, the sound field that amplitude is regulated and controled by Gaussian function is illustrated, near-field effect completely eliminates, and field strength becomes along axial
Must be very uniform, gentle decline is radially presented, near field does not have big ups and downs.Its actual three-dimensional sound field is using center as axle center
Rotation figure.
In Fig. 6, the sound field that amplitude is regulated and controled by linear function is illustrated, the inhomogeneities near field substantially eliminates, close to change
The sound field on energy device surface becomes very uniformly along axial direction, not clear focus, has very long one section of sound field all very uniformly along axial direction.In fact
The three-dimensional sound field on border is the rotation figure using center as axle center.
In Fig. 7, the sound field that amplitude is regulated and controled by radical sign function is illustrated, near-field effect weakens, without specific focus,
Originally focus area, field strength are becoming relatively uniform along axial direction, and gentle decline is radially presented, and available sound field is in original
Near focal point, and not near field；This design is suitable for having the case where certain distance, such as cancer apart from transducer face to target spot
Disease interior therapeutic.Its actual three-dimensional sound field is the rotation figure using center as axle center.
After all array elements are regulated in the present invention, the uneven amplitude of certain rule is formed.
It is different with the principle of traditional ring battle array phased array that amplitude mentioned by the disclosure regulates and controls ring battle array.Traditional phased array needs
Multichannel power drives are wanted, as soon as that is, each array element needs an individual channel, how many array element needs how many channel, and its
Driving method is that the amplitude of each array element is identical and phase is different, and the purpose of phased array is to regulate and control focus by regulation phase
Spatial position, sound-filed simulation are still near field-focus-far field form.
And the driving principle of the disclosure is each array element phase invariant, each array element is connected an adjustable resistance, by can
It adjusts resistance to regulate and control the amplitude of each array element, consumes the amplitude of power supply on corresponding resistance, finally formed in array element
Desired distribution of amplitudes.All array elements are all parallel in a single channel driving power, it is therefore an objective to change sound field spatial distribution feelings
Condition eliminates the inhomogeneities near field, to generate sound field distributed relatively uniformly in local space.
Application field of the invention includes Bioexperiment relevant to ultrasound, medical experiment harmony chemical testing apparatus, body
The internal animal of the experimental provision of outer cell sound dynamic therapy and ultrasonic wave added chemotherapy, sound dynamic therapy and ultrasonic wave added chemotherapy is tried
Test equipment therefor；Ultrasonic modality；The ultrasonic device for the treatment of of animals and human clinical therapy.
Claims (6)
1. a kind of amplitude regulates and controls uniform field ring battle array ultrasonic transducer, which is characterized in that it includes a burst of member of N number of ring and N-1 can
Resistance is adjusted, N number of a burst of member of ring passes sequentially through resin from inside to outside and is socketed to form a disk；By a burst of first ecto-entad of N number of ring
Successively it is ordered as 0,1,2 ... ..., N-1, wherein the 1st, 2,3 ... ..., a burst of member of N-1 ring is connected an adjustable resistance respectively,
After a burst of member parallel connection of N number of ring, it is connect with single channel driving power；
Regulate and control the amplitude of a burst of member of respective rings by adjusting the resistance value of each adjustable resistance, to adjust energy converter near-field region
Sound field intensity distribution；
The side of a burst of member of N number of ring is grounded after connecting with the other side of the 0th a burst of member of ring, the the 1st, 2,3 ... ..., N-1
Another side surface of a a burst of member of ring is separately connected the sliding end of an adjustable resistance, one end ground connection of all adjustable resistances, institute
There is the other end of adjustable resistance while connecting the anode of driving power.
2. amplitude according to claim 1 regulates and controls uniform field ring battle array ultrasonic transducer, which is characterized in that according to cosine function
Form successively regulate and control the amplitude of a burst of member of each ring, and keep the amplitude of the N-1 a burst of member of ring maximum.
3. amplitude according to claim 1 regulates and controls uniform field ring battle array ultrasonic transducer, which is characterized in that according to Gaussian function
Form successively regulate and control the amplitude of a burst of member of each ring, and keep the amplitude of the N-1 a burst of member of ring maximum.
4. amplitude according to claim 1 regulates and controls uniform field ring battle array ultrasonic transducer, which is characterized in that according to power exponent letter
Several forms successively regulates and controls the amplitude of a burst of member of each ring, and keeps the amplitude of the N-1 a burst of member of ring maximum.
5. amplitude according to claim 1 regulates and controls uniform field ring battle array ultrasonic transducer, which is characterized in that according to linear decline
The form of function successively regulates and controls the amplitude of a burst of member of each ring, and keeps the amplitude of the N-1 a burst of member of ring maximum.
6. amplitude according to claim 1 regulates and controls uniform field ring battle array ultrasonic transducer, which is characterized in that the N is greater than 2
Integer.
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| CN110301938A (en) * | 2019-07-15 | 2019-10-08 | 无锡海斯凯尔医学技术有限公司 | Probe and tissue elasticity detection system |
| CN110479569B (en) * | 2019-08-27 | 2021-03-12 | 哈尔滨工业大学 | Adjustable columnar uniform near-field ultrasonic transducer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379901A (en) * | 1965-01-08 | 1968-04-23 | James R. Richards | Fetal heart transducer and method of manufacture |
| CN102450035A (en) * | 2010-03-29 | 2012-05-09 | 松下电器产业株式会社 | Piezoelectric sound converter |
| CN104013420A (en) * | 2013-02-28 | 2014-09-03 | 精工爱普生株式会社 | Ultrasonic transducer device, head unit, probe, and ultrasonic imaging apparatus |
| CN105147337A (en) * | 2015-10-28 | 2015-12-16 | 上海爱声生物医疗科技有限公司 | Ultrasonic transducer with improved sound field performance and improving method thereof |
| CN204992728U (en) * | 2015-10-13 | 2016-01-20 | 盐城工学院 | Ultrasonic wave wireless charging device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8811636B2 (en) * | 2011-11-29 | 2014-08-19 | Qualcomm Mems Technologies, Inc. | Microspeaker with piezoelectric, metal and dielectric membrane |
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- 2017-11-23 CN CN201711177891.8A patent/CN107716258B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379901A (en) * | 1965-01-08 | 1968-04-23 | James R. Richards | Fetal heart transducer and method of manufacture |
| CN102450035A (en) * | 2010-03-29 | 2012-05-09 | 松下电器产业株式会社 | Piezoelectric sound converter |
| CN104013420A (en) * | 2013-02-28 | 2014-09-03 | 精工爱普生株式会社 | Ultrasonic transducer device, head unit, probe, and ultrasonic imaging apparatus |
| CN204992728U (en) * | 2015-10-13 | 2016-01-20 | 盐城工学院 | Ultrasonic wave wireless charging device |
| CN105147337A (en) * | 2015-10-28 | 2015-12-16 | 上海爱声生物医疗科技有限公司 | Ultrasonic transducer with improved sound field performance and improving method thereof |
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Effective date of registration: 20220110 Address after: 215500 No.5, research institute road, Changshu Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou International acoustic industry technology innovation center Address before: 150001 No. 92 West straight street, Nangang District, Heilongjiang, Harbin Patentee before: HARBIN INSTITUTE OF TECHNOLOGY |