CN214318872U

CN214318872U - Surface focusing ultrasonic transducer array and transducer thereof

Info

Publication number: CN214318872U
Application number: CN202021623625.0U
Authority: CN
Inventors: 郭甲; 王祥达; 何建方; 滕世国; 李建霖; 李萍
Original assignee: Shaoguan East Sunshine Automation Equipment Co Ltd
Current assignee: Shaoguan East Sunshine Automation Equipment Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-10-01
Anticipated expiration: 2030-08-06

Abstract

The utility model relates to the technical field of transducers, in particular to a surface focusing ultrasonic transducer array and a transducer thereof, which comprises a plurality of array elements; each array element comprises a frame and a crystal layer fixedly arranged on the frame, and the crystal layer is a concave arc surface structure which is concave towards the frame and can be focused linearly; the array element structure also comprises a control device electrically connected with the crystal layer of each array element, and the control device controls each array element to work independently. The utility model forms a transducer array by arranging a plurality of hollow semi-cylindrical transducers which can be focused by lines, and forms a planar focusing area by combination, thereby increasing the focusing volume and reducing the treatment time; in addition, each array element is controlled to work independently through the control device, so that part of the array elements can work and part of the array elements are closed to form a required focusing volume and a required focusing shape, and human tissues which do not need to be treated are avoided.

Description

Surface focusing ultrasonic transducer array and transducer thereof

Technical Field

The utility model relates to a transducer technical field, more specifically relate to a face focus ultrasonic transducer array and transducer thereof.

Background

The existing focusing ultrasonic transducer generally consists of a single spherical transducer, the focusing is directly carried out on a geometric focus of the spherical transducer, the position is relatively fixed, the position of the focus can be changed only in a mechanical movement mode, and the flexibility is poor; or a phased array consisting of a plurality of ultrasonic transducer array elements, and the phase and amplitude of each array element are regulated and controlled, so that the focal length and the focal position are electronically regulated, but the regulation mode is not flexible enough for a complicated human body structure.

Chinese patent CN105228699A discloses a line focus ultrasonic transducer and a high-intensity line focus ultrasonic generator including the same, comprising: a piezoelectric element for treatment, which is in a hollow semi-cylindrical shape; a 1 st electrode unit provided on an inner surface of the piezoelectric element for therapy; and a 2 nd electrode part which is provided on the outer surface of the piezoelectric element for treatment corresponding to the 1 st electrode part. It can only perform line focusing, and the overall structure of the transducer is complex, and also requires cumbersome mechanical movements to change the focal position.

Chinese patent CN209421976U discloses a flexible ultrasonic transducer array and a focusing transducer, which includes a flexible substrate with characteristics of easy deformation and bending, and a plurality of vibration elements embedded on the flexible substrate, wherein the first end and the second end of the vibration elements respectively protrude out of the upper surface and the lower surface of the vibration elements, so that the provided flexible ultrasonic transducer array will also have the characteristics of easy deformation and bending. Therefore, when the flexible ultrasonic transducer array is applied to the field of medical treatment, the shape of the flexible ultrasonic transducer array can be changed according to the shape of the surface of a human body, namely for the surfaces of the human bodies with different shapes, the same flexible ultrasonic transducer array can be adopted to carry out ultrasonic imaging or ultrasonic treatment on the surfaces of the human bodies, and the flexible ultrasonic transducer array is flexible.

Although the flexible substrate can make the shape of the transducer array change according to the requirement of the human body structure, the focal volume is small in a line focusing or point focusing mode, and when a tumor with a large focal volume is treated, a long treatment time is required, which causes great pain and inconvenience to doctors and patients.

In addition, chinese patent CN201482706U discloses a cylindrical ultrasonic transducer, which can obtain a high-intensity cylindrical focusing ultrasonic field in the vicinity of the hollow threaded tube axis of the composite ultrasonic tube, but it can only form a single cylindrical focusing, and is not flexible enough, and its structure is complex, and the intensity of the generated ultrasonic field is too high, and it is not suitable for being applied to medical instruments.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome among the above-mentioned prior art not enough that transducer focus mode is single, the focus is small, the structure is complicated, provide a simple structure, the focus mode is various, the bulky face focus ultrasonic transducer array of focus and transducer.

In the technical scheme, the surface focusing ultrasonic transducer array comprises a plurality of array elements; each array element comprises a frame and a crystal layer fixedly arranged on the frame, and the crystal layer is a concave arc surface structure which is concave towards the frame and can be focused linearly; the array element structure also comprises a control device electrically connected with the crystal layer of each array element, and the control device controls each array element to work independently.

The utility model discloses in through setting up a plurality of array elements that can focus on the line, every array element focus on the line combination and form a planar focus area, make focus area can increase along with the number of array element, but not punctiform or linear focusing, greatly shortened the tumour treatment time of big focus volume, alleviateed patient's misery; in addition, each array element is connected to the control device, so that doctors can conveniently and individually control the array elements on the transducer array, the array elements form a required focusing volume and a focusing shape, the focusing mode is diversified, and specific human tissues can be avoided.

Preferably, the control device is a multi-channel controller, the multi-channel controller has independent channels with the number greater than or equal to a plurality of array elements, and each independent channel correspondingly controls each array element. The setting is so in order to make controlling means can be to every array element independent control, and the crystal layer transmission ultrasonic wave of every array element is encouraged alone, can control some array element work transmission ultrasonic wave on the transducer array through controlling means like this, forms required focus volume and shape, avoids causing too much influence to the human body, has also reduced the waste of the energy simultaneously.

Preferably, the crystal layer includes a first electrode layer, a piezoelectric element, and a second electrode layer connected in sequence, the first electrode layer is close to the frame, the first electrode layer and the second electrode layer are both electrically connected to the control device, and the piezoelectric element is driven to vibrate according to an excitation signal of the control device.

Preferably, the orthographic projection of the crystal layer on the frame is rectangular, and the arrangement is to make each array element have the same regular structure, so that the area focused when each array element is arranged in various arrays is conveniently controlled.

Preferably, the frame is a hollow structure, and the frame and the crystal layer are fixedly connected in a sealing manner to form a hollow semi-cylindrical structure, which is arranged to realize the acoustic matching function of the transducer.

Preferably, the array is one or combination of a plurality of rectangular arrays, circular arrays, spherical arrays, arc arrays and irregular arrays, and different focal areas can be formed into different focal planes in different array forms, so that the work of medical workers is greatly facilitated.

Preferably, the piezoelectric element is made of one of piezoelectric ceramics, piezoelectric crystals and composite piezoelectric substances, and has a piezoelectric effect, and can convert an electric signal into an acoustic signal or convert the acoustic signal into the electric signal; the piezoelectric element generates high-frequency vibration to emit ultrasonic waves after being electrically excited by the first electrode layer and the second electrode layer, and the ultrasonic waves are focused at corresponding positions.

The technical scheme also provides a surface focusing ultrasonic transducer which comprises the surface focusing ultrasonic transducer array.

Preferably, the surface-focusing ultrasonic transducer further comprises a backing, and one surface of the frame, which is far away from the concave arc surface of the crystal layer, is fixedly arranged on the backing so as to position each array element and fix the array form formed by the array elements.

Preferably, the backing is one of a plane structure, a cambered surface structure, a spherical surface structure and an irregular structure, so that each array element can be fixed on the backing to form various arrays, and medical workers can conveniently select a proper transducer for treatment according to the size of a lesion position and the like.

Compared with the prior art, the beneficial effects are:

the utility model discloses in through setting up the array element that a plurality of cavity semicylindrical can focus on the line, the array element can be arranged and form multiple array form, the crystal layer of every array element focuses on or focuses on crossing position in the parallel direction, the combination forms a planar focus area for the focus volume can increase along with the number of array element, and is not punctiform or linear focus, very big tumour treatment time who has shortened the large focus volume, has alleviateed patient's misery; in addition, each array element is connected to the multi-channel controller and is controlled by one independent channel, so that independent work of each array element is realized, a doctor can conveniently realize independent control on the array elements on the transducer array, partial array elements can work and be closed to form a required focusing volume and a required focusing shape, and human tissues which do not need to be treated are avoided; the hollow semi-cylindrical array elements capable of being line-focused are arranged on the back lining, and the structure is simpler.

Drawings

Fig. 1 is a schematic view of the overall structure of a surface-focused ultrasound transducer array according to embodiment 1 of the present invention;

fig. 2 is an overall schematic diagram of an array element structure of a surface-focused ultrasound transducer array according to embodiment 1 of the present invention;

fig. 3 is a top view of an array element of a surface-focused ultrasound transducer array according to embodiment 1 of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view of part A of FIG. 4;

fig. 6 is a schematic view of the overall structure of a surface-focused ultrasonic transducer according to embodiment 1 of the present invention;

FIG. 7 is a graph showing the results of the focus simulation of FIG. 2;

FIG. 8 is a diagram illustrating the results of the focus simulation of FIG. 6;

fig. 9 is a schematic control diagram of a control device of a surface-focused ultrasound transducer array according to embodiment 1 of the present invention;

fig. 10 is a schematic view of the overall structure of a surface-focused ultrasound transducer according to embodiment 2 of the present invention;

FIG. 11 is a graph showing the results of the focus simulation of FIG. 10;

fig. 12 is a control schematic diagram of a control device according to embodiment 3 of the present invention.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limiting the present patent, and those skilled in the art will understand the specific meaning of the terms according to their specific circumstances.

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example 1

Fig. 1 to 9 show an embodiment of an area-focused ultrasound transducer array, which includes 64 array elements 1; each array element 1 comprises a frame 2 and a crystal layer 3 fixedly arranged on the frame 2, and the crystal layer 3 is a concave arc surface structure which is concave towards the frame 2 and can be linearly focused; the array element structure further comprises a control device electrically connected with the crystal layer 3 of each array element 1, and the control device controls each array element 1 to work independently.

As shown in fig. 9, the control device in this embodiment is a multi-channel controller, the multi-channel controller has independent channels with the number greater than or equal to 64, and each independent channel controls each array element 1 correspondingly. The setting is so in order to make controlling means can be to every array element 1 independent control, and the crystal layer 3 transmission ultrasonic wave of every array element 1 of individual excitation can form required focus volume and shape through the ultrasonic wave of some array element 1 work transmission on controlling means control transducer array like this, avoids causing too much influence to the human body, has also reduced the waste of the energy simultaneously. It should be noted that the control device in this embodiment is a multi-channel controller, which is only a preferred form, and is not a limitation to this embodiment, and it is needless to say that a plurality of control devices may be adopted, and each control device is connected to each array element 1 to realize independent control.

As shown in fig. 5, the crystal layer 3 in this embodiment includes a first electrode layer 31, a piezoelectric element 32, and a second electrode layer 33 connected in this order, the first electrode layer 31 is close to the frame 2, both the first electrode layer 31 and the second electrode layer 33 are electrically connected to a control device, and the piezoelectric element 32 is driven to vibrate according to an excitation signal of the control device.

As shown in fig. 3, the orthographic projection of the crystal layer 3 on the frame 2 in this embodiment is rectangular, and this is set so that each array element 1 has the same regular structure, and it is convenient to control the focusing region when each array element 1 performs various array arrangements.

As shown in fig. 2 and 4, the frame 2 in this embodiment is a hollow structure, and the frame 2 and the crystal layer 3 are fixedly connected in a sealing manner to form a hollow semi-cylindrical structure, which is configured to implement the acoustic matching function of the transducer. It should be noted that the dimensions of the hollow semi-cylindrical structure and the crystal layer are not limited in this embodiment, and crystal layers 3 and frames 2 matching the same with different dimensions can be selected according to the needs.

The array in this embodiment is an 8 × 8 rectangular array, which can form a regular rectangular focal plane. It should be noted that, 64 array elements are used to form an 8 × 8 rectangular array, which is only one implementation manner referred to in this embodiment, and is not to be understood as a limitation to this solution, the number and the array form of the array elements 1 are not limited thereto, and other numbers of array elements 1 may be used to form one or a combination of another rectangular array, a circular array, a spherical array, an arc array, and an irregular array according to needs.

The piezoelectric element 32 in this embodiment is made of one of piezoelectric ceramics, piezoelectric crystals, and composite piezoelectric materials, and has a piezoelectric effect, and can convert an electrical signal into an acoustic signal, or convert an acoustic signal into an electrical signal; the piezoelectric element 32 generates high-frequency vibration and emits ultrasonic waves when electrically excited by the first electrode layer 31 and the second electrode layer 33, and the ultrasonic waves are focused at corresponding positions. The material of the piezoelectric element 32 is not limited to the above-described material, as long as it can generate high-frequency vibration and emit ultrasonic waves by electric excitation; in addition, the thickness and material of the piezoelectric element 32 determine the frequency of the ultrasonic waves generated by the piezoelectric element, which is not limited in this embodiment, and includes all frequencies that can be used in ultrasonic therapy.

As shown in fig. 6, the surface-focused ultrasonic transducer comprises the transducer array and the planar rectangular backing 4, wherein one surface of the frame 2, which is far away from the concave arc surface of the crystal layer 3, is fixedly arranged on the backing 4 so as to position each array element 1 and fix the planar rectangular array formed by the array elements.

Example 2

Fig. 10 and fig. 11 show an embodiment of an area focusing ultrasonic transducer array.

This embodiment is different from embodiment 1 only in the array form of the array element 1.

As shown in fig. 10, the array form of the array element 1 in the present embodiment is a hollow rectangular array.

Example 3

Fig. 12 shows an embodiment of an area focusing ultrasonic transducer array.

The present embodiment is different from embodiment 1 or embodiment 2 only in the control device.

As shown in fig. 12, the control device in this embodiment is a plurality of independent controllers, and each controller is connected to each array element 1, so as to realize independent control of the array element 1.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An area focusing ultrasonic transducer array is characterized by comprising a plurality of array elements (1); each array element (1) comprises a frame (2) and a crystal layer (3) fixedly arranged on the frame (2), wherein the crystal layer (3) is a concave arc surface structure which is concave towards the frame (2) and can be focused linearly; the array element structure is characterized by further comprising a control device electrically connected with the crystal layer (3) of each array element (1), and the control device controls each array element (1) to work independently.

2. The area-focusing ultrasonic transducer array according to claim 1, wherein said control device is a multi-channel controller, said multi-channel controller has a number of independent channels greater than or equal to said number of array elements (1), and each independent channel controls each array element (1) correspondingly.

3. The area-focusing ultrasonic transducer array according to claim 2, wherein the crystal layer (3) comprises a first electrode layer (31), a piezoelectric element (32) and a second electrode layer (33) which are connected in sequence, the first electrode layer (31) is close to the frame (2), the first electrode layer (31) and the second electrode layer (33) are both electrically connected with the control device, and the piezoelectric element (32) is driven to vibrate according to an excitation signal of the control device.

4. An area focused ultrasound transducer array according to claim 3, characterized in that the orthographic projection of the crystal layer (3) on the frame (2) is rectangular.

5. The area-focusing ultrasonic transducer array according to claim 4, wherein said frame (2) is a hollow structure, and said frame (2) and said crystal layer (3) are fixedly connected in a sealing manner to form a hollow semi-cylindrical structure.

6. The area focus ultrasonic transducer array of claim 1, wherein the array is one or a combination of a rectangular array, a circular array, a spherical array and an arc array.

7. The area-focusing ultrasonic transducer array according to claim 5, wherein the piezoelectric element (32) is made of one of piezoelectric ceramics, piezoelectric crystals and composite piezoelectric substances.

8. An area focus ultrasonic transducer comprising an area focus ultrasonic transducer array according to claim 7.

9. An area focused ultrasound transducer according to claim 8, characterized by further comprising a backing (4), wherein the side of the frame (2) facing away from the concave arc of the crystal layer (3) is fixedly arranged on the backing (4).

10. An area focused ultrasound transducer according to claim 9, characterized in that the backing (4) is one of a planar structure, a cambered structure and a spherical structure.