Ultrasonic transducer and ultrasonic catheter comprising same
By designing a double-sided imaging ultrasonic transducer in an ultrasonic catheter, double-sided imaging is achieved using piezoelectric ceramic layer and matching layer, and independently controlling each array element through the switching device, the inconvenience and trauma of traditional ultrasonic catheter is solved, and the problems of inconvenience and trauma of traditional ultrasonic catheter are improved. Operational efficiency and safety.
Patent Information
- Application Number
- CN202420477039.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-12
AI Technical Summary
Traditional interventional ultrasound medical devices such as ultrasound catheters use one-dimensional ultrasound transducers, which are inconvenient to operate and easily lead to patient trauma. The operator needs to skillfully control the ultrasound catheters to image in multiple directions, which increases the risk of surgery and difficulty of operation. .
Design an ultrasonic transducer, by providing piezoelectric ceramic layers and matching layers on both sides of the backing layer, enables it to radiate sound waves outward in two opposite directions, realizes double-sided imaging, and passes through switching devices and electrodes Lines independently control each array element to reduce the operator's rotation and movement needs.
It reduces the movement amplitude and intervention time of the ultrasonic transducer in the patient's body, reduces the risk of trauma to the patient, simplifies the difficulty of operation, and improves the operator's judgment ability and scanning efficiency.
Smart Images
Figure CN222237707U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ultrasonic equipment, in particular to an ultrasonic transducer and an ultrasonic catheter comprising the same. Background Art
[0002] Ultrasound has been widely used in medical imaging diagnosis due to its obvious advantages such as no radiation, real-time dynamic imaging, and observable blood flow. With the development of medical technology, interventional surgery is becoming more and more widely used, and interventional ultrasound (intervention in the human body, such as transvascular ultrasound) medical devices have also achieved unprecedented development, and the application of corresponding technologies is becoming more and more extensive.
[0003] Ultrasonic transducers are an important part of ultrasonic medical devices. However, traditional interventional ultrasonic medical devices such as ultrasonic catheters mostly use one-dimensional ultrasonic transducers, which means that only the section facing the direction of the ultrasonic transducer can be imaged. If ultrasonic images in other directions are required, the operator needs to control the movement, rotation or bending of the ultrasonic catheter to face the part that needs to be scanned; especially when the area facing away from the ultrasonic transducer needs to be detected, the ultrasonic catheter needs to be rotated 180°. This operation is time-consuming and laborious, and the large movement of the ultrasonic catheter during scanning in the patient's body will also increase the risk of damage to the patient's blood vessels or heart chambers. Therefore, the operator needs to operate the ultrasonic catheter very skillfully and carefully, which not only increases the risk of surgery but also requires a high level of proficiency from the operator.
[0004] In addition, traditional ultrasound catheters, especially cardiac ultrasound catheters, have a narrow imaging range of one-dimensional ultrasound transducers and different imaging angles from conventional angles. Operators usually need a long period of training to determine the location of the ultrasound catheter and the relative position of the detection target and the ultrasound catheter through special sections and special physiological structures inside the heart. This requires the operator to not only have a deep understanding of the anatomical structure of the heart, but also to be fully familiar with the imaging characteristics of interventional ultrasound and to be proficient in operating the ultrasound catheter in order to accurately find the direction of exploration. This high requirement for operators has also severely limited the popularization and promotion of interventional ultrasound. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the defects of the ultrasonic transducer and ultrasonic catheter in the prior art that they are inconvenient to operate and easily cause trauma to patients, and to provide an ultrasonic transducer and an ultrasonic catheter containing the same.
[0006] The utility model solves the above technical problems through the following technical solutions:
[0007] An ultrasonic transducer comprises a backing layer, a first matching layer, a second matching layer, a first piezoelectric ceramic layer and a second piezoelectric ceramic layer; along the direction away from the backing layer, the first piezoelectric ceramic layer and the first matching layer are stacked in sequence on one side of the backing layer, and the second piezoelectric ceramic layer and the second matching layer are stacked in sequence on the other side of the backing layer.
[0008] In the present solution, by respectively arranging a piezoelectric ceramic layer and a matching layer on both sides of the backing layer, the ultrasonic transducer can radiate sound waves outward in two opposite directions to obtain imaging in two directions. The operator can obtain imaging of one side and the opposite side without rotating the ultrasonic transducer during use, thereby reducing the movement amplitude and intervention time of the ultrasonic transducer during intervention in the patient's body, thereby reducing the risk of the ultrasonic transducer causing trauma to the patient, and also reducing the difficulty of using the ultrasonic transducer, making it easier for the operator to use. In addition, the ultrasonic transducer in the present solution can achieve double-sided imaging, and the operator can more easily determine the relative position of the ultrasonic transducer in the patient's body by comparing the imaging in two directions, so as to complete the scanning of the lesion as soon as possible.
[0009] Preferably, the ultrasonic transducer includes a plurality of the first matching layers, a plurality of the second matching layers, a plurality of the first piezoelectric ceramic layers and a plurality of the second piezoelectric ceramic layers; any one of the first matching layers and the first piezoelectric ceramic layer stacked therewith and the backing layer form a first array element; any one of the first array elements is connected to a first electrode line, and the first electrode line is electrically connected to the first piezoelectric ceramic layer; any one of the second matching layers and the second piezoelectric ceramic layer stacked therewith and the backing layer forms a second array element; any one of the second array elements is connected to a second electrode line, and the second electrode line is electrically connected to the second piezoelectric ceramic layer.
[0010] In this solution, the ultrasonic transducer includes a plurality of array elements formed by a matching layer, a piezoelectric ceramic layer and a backing layer. The piezoelectric ceramic layer in the array element is connected to an electrode line. An electrical signal can be input into the piezoelectric ceramic layer through the electrode line, and converted into a mechanical signal (sound wave) by the piezoelectric ceramic layer and radiated out. The mechanical signal (sound wave) received (reflected back) by the piezoelectric ceramic layer can also be converted into an electrical signal and output through the electrode line. Furthermore, there are a plurality of first array elements and a plurality of second array elements on both sides of the backing layer, and the first array element and the second array element are connected to the first electrode line and the second electrode line respectively, without interfering with each other, so as to facilitate relatively independent control of the operation of the first array element and the second array element, thereby facilitating more flexible use and troubleshooting of the ultrasonic transducer.
[0011] Preferably, the ultrasonic transducer further comprises a switching device; the switching device is electrically connected to the first electrode line and the second electrode line respectively, and the switching device is used to switch between the first electrode line transmitting a signal or the second electrode line transmitting a signal.
[0012] In the present embodiment, the switching device can switch the first electrode line or the second electrode line to transmit signals, thereby, the operator can select the first array element or the second array element on both sides of the backing layer to complete scanning and imaging according to actual conditions, that is, it is convenient for the operator to switch the first array element and the second array element to work separately to detect targets in the positive and negative directions of the ultrasonic transducer respectively.
[0013] Preferably, the frequency of the sound waves emitted by the first array element after being energized is different from the frequency of the sound waves emitted by the second array element after being energized.
[0014] For ultrasonic imaging equipment, imaging quality and resolution are proportional to the frequency of the ultrasonic transducer, but penetration is inversely proportional to the frequency. The frequency coverage of traditional one-dimensional ultrasonic transducers is relatively single, and it is impossible to take into account both penetration and imaging resolution. In this solution, the ultrasonic transducer can perform double-sided imaging, and the frequencies of the first and second array elements in the two directions are different, so that the ultrasonic transducer can take into account both penetration and imaging resolution.
[0015] Preferably, the number of the first array elements is different from the number of the second array elements.
[0016] For ultrasonic imaging equipment, the more array elements there are, the better the imaging quality and the wider the scanning range, but the cost also increases accordingly and the requirements for the manufacturing process are also higher. In this solution, through the above-mentioned structural form, different numbers of first array elements and second array elements can be set on both sides of the backing layer according to actual needs to balance cost and performance.
[0017] Preferably, a matrix array is formed between the plurality of first array elements and between the plurality of second array elements; an array element width of the matrix array formed between the plurality of first array elements is different from an array element width of the matrix array formed between the plurality of second array elements; and / or an array length of the matrix array formed between the plurality of first array elements is different from an array length of the matrix array formed between the plurality of second array elements.
[0018] For ultrasonic imaging equipment, the larger the size of the (matrix) array composed of array elements, the greater the scanning accuracy, but the smaller the viewing angle range. In this solution, by setting the matrix array formed between the first array elements and the matrix array formed between the second array elements to have different array element widths and / or array lengths, the sizes of the arrays formed by the array elements on both sides of the backing layer are different, so that the ultrasonic transducer can balance the scanning accuracy and the imaging viewing angle range.
[0019] Preferably, the frequency of the sound waves emitted by the first array element after being energized is the same as the frequency of the sound waves emitted by the second array element after being energized; and / or, a matrix array is formed between the plurality of the first array elements and between the plurality of the second array elements, and the matrix array formed between the plurality of the first array elements and the matrix array formed between the plurality of the second array elements are symmetrically arranged with respect to the backing layer.
[0020] In this solution, through the above-mentioned structural form, the array elements or array element arrays on both sides of the backing layer have the same performance, which can ensure that the imaging viewing angle and imaging quality on both sides of the ultrasonic transducer are the same and is easy to manufacture.
[0021] Preferably, the backing layer is integrally formed of a material capable of absorbing sound waves, or the backing layer is formed by laminating and bonding multiple layers of material capable of absorbing sound waves.
[0022] In the present scheme, through the above-mentioned structural form, the formation method of the backing layer can be selected according to the actual situation. The one-piece molded backing layer can simplify the manufacturing difficulty of the backing layer itself. At the same time, the first piezoelectric ceramic layer in the first array element and the second piezoelectric ceramic layer in the second array element share the same backing layer, so that the thickness of the backing layer can be reduced; and when the backing layer is formed by stacking and bonding multiple layers of materials that can absorb sound waves, the first array element can be connected on a certain layer (or some) and the second array element can be connected on other layers, and then the multiple layers of materials that can absorb sound waves are stacked and bonded to form a complete ultrasonic transducer, that is, the connection of the first array element and the connection of the second array element do not affect each other, thereby improving manufacturing efficiency.
[0023] An ultrasonic catheter comprises a tube body and the ultrasonic transducer as described above; the ultrasonic transducer is arranged at one end of the tube body.
[0024] In this solution, the ultrasonic transducer is arranged at one end of the tube body of the ultrasonic catheter, so that the ultrasonic transducer can be introduced into the human body with the help of the tube body to complete the scanning.
[0025] Preferably, the tube body is made of a flexible material; the ultrasonic catheter further comprises a control knob, the control knob is connected to an end of the tube body away from the ultrasonic transducer, and the control knob is used to control the bending and deflection of the tube body.
[0026] In this solution, the control knob controls the bending and deflection of the tube body, making the tube body suitable for moving in the human body. At the same time, under the premise that the ultrasonic transducer is fixedly connected to the tube body, the bending and deflection of the tube body can also change the scanning direction of the ultrasonic transducer.
[0027] The positive and progressive effects of the utility model are:
[0028] In the utility model, by respectively arranging a piezoelectric ceramic layer and a matching layer on both sides of the backing layer, the ultrasonic transducer can radiate sound waves outward in two opposite directions to obtain imaging in two directions. When using, the operator can obtain imaging of a certain side and the opposite side without rotating the ultrasonic transducer, thereby reducing the movement amplitude and intervention time of the ultrasonic transducer when intervening in the patient's body, thereby reducing the risk of the ultrasonic transducer causing trauma to the patient, and also reducing the difficulty of using the ultrasonic transducer, making it convenient for the operator to use; in addition, the ultrasonic transducer in this solution can achieve double-sided imaging, and the operator can more easily determine the relative position of the ultrasonic transducer in the patient's body by comparing the imaging in two directions, so as to complete the scanning of the lesion as soon as possible. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a schematic structural diagram of an ultrasonic catheter according to a preferred embodiment of the utility model.
[0030] Figure 2 The figure is a schematic cross-sectional structure diagram of an ultrasonic transducer according to a preferred embodiment of the present utility model.
[0031] Description of reference numerals:
[0032] Ultrasonic transducer 10, backing layer 11, first matching layer 12, second matching layer 13, first piezoelectric ceramic layer 14, second piezoelectric ceramic layer 15, first electrode wire bundle 16, second electrode wire bundle 17, first array element group 20, second array element group 30, transducer wire bundle 40, switching device 50, control knob 60, tube body 70. DETAILED DESCRIPTION
[0033] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.
[0034] like Figure 1 As shown, this embodiment provides an ultrasonic catheter, which includes a tube body 70 and an ultrasonic transducer 10, wherein the ultrasonic transducer 10 is disposed at one end of the tube body 70. With the help of the tube body 70, the ultrasonic transducer 10 can be introduced into the human body to complete the scanning.
[0035] like Figure 2 As shown, the ultrasonic transducer 10 includes a backing layer 11, a first matching layer 12, a second matching layer 13, a first piezoelectric ceramic layer 14 and a second piezoelectric ceramic layer 15; along the direction away from the backing layer 11, the first piezoelectric ceramic layer 14 and the first matching layer 12 are stacked in sequence on one side of the backing layer 11, and the second piezoelectric ceramic layer 15 and the second matching layer 13 are stacked in sequence on the other side of the backing layer 11.
[0036] Generally, the piezoelectric ceramic layer can realize the conversion between electrical signals and mechanical signals (or the conversion between electrical energy and mechanical energy); in the ultrasonic transducer 10, the piezoelectric ceramic layer can convert electrical signals into sound waves for radiation, and can also convert received sound waves into electrical signals for output. The matching layer is used to match the radiation medium so that the sound waves emitted by the piezoelectric ceramic layer can enter the radiation medium more easily. A backing layer 11 is provided on the side of the piezoelectric ceramic layer away from the matching layer, which can absorb sound waves, so that the ultrasonic transducer 10 (or the piezoelectric ceramic layer) can achieve the effect of unidirectional radiation.
[0037] Simply put, the working principle of the ultrasonic transducer 10 is to first convert the electrical signal into sound waves through the piezoelectric ceramic layer and radiate them to the target to be detected. After the sound waves contact the target to be detected, they are reflected back to the piezoelectric ceramic layer. The piezoelectric ceramic layer then converts the reflected sound waves into electrical signals for output. After being processed by a computer, the image is output for doctors and other operators to view and then diagnose the condition.
[0038] In this embodiment, by respectively arranging a piezoelectric ceramic layer and a matching layer on both sides of the backing layer 11, the ultrasonic transducer 10 can radiate sound waves outward in two opposite directions to obtain imaging in two directions. When using, the operator can obtain imaging of a certain side and the opposite side without rotating the ultrasonic transducer 10, thereby reducing the movement amplitude and intervention time of the ultrasonic transducer 10 when intervening in the patient's body, thereby reducing the risk of the ultrasonic transducer 10 causing trauma to the patient, and also reducing the difficulty of using the ultrasonic transducer 10, making it convenient for the operator to use; in addition, the ultrasonic transducer 10 in this solution can achieve double-sided imaging, and the operator can more easily determine the relative position of the ultrasonic transducer 10 in the patient's body by comparing the imaging in two directions, so as to complete the scanning of the lesion as soon as possible.
[0039] Specifically, the ultrasonic transducer 10 includes a plurality of first matching layers 12, a plurality of second matching layers 13, a plurality of first piezoelectric ceramic layers 14 and a plurality of second piezoelectric ceramic layers 15; any first matching layer 12 and the first piezoelectric ceramic layer 14 stacked therewith and the backing layer 11 form a first array element; any first array element is connected to a first electrode line, and the first electrode line is electrically connected to the first piezoelectric ceramic layer 14; any second matching layer 13 and the second piezoelectric ceramic layer 15 stacked therewith and the backing layer 11 form a second array element; any second array element is connected to a second electrode line, and the second electrode line is electrically connected to the second piezoelectric ceramic layer 15.
[0040] As a general common sense in the art, the matching layer, piezoelectric ceramic layer, and even the backing layer 11 in the ultrasonic transducer 10 are not a complete whole in their respective extension directions. The ultrasonic transducer 10 usually includes or is divided into a number of minimum units that can independently transmit and receive sound waves, which are called "array elements". That is, from an overall perspective, the ultrasonic transducer 10 includes the entire matching layer, the entire piezoelectric ceramic layer, and the entire backing layer 11; and specifically, the ultrasonic transducer 10 includes a plurality of array elements, each of which includes a portion of the entire matching layer, a portion of the entire piezoelectric ceramic layer, and a portion of the entire backing layer 11.
[0041] For the convenience of illustration, Figure 1 In the figure, the first array element group 20 indicates that the ultrasonic transducer 10 has a plurality of first array elements on this side, and the second array element group 30 indicates that the ultrasonic transducer 10 has a plurality of second array elements on this side.
[0042] It can be understood that one way to set up the ultrasonic transducer 10 can be to first set up a whole layer of backing layer 11, and then stack whole layers of first piezoelectric ceramic layer 14 and second piezoelectric ceramic layer 15 on both sides of the backing layer 11, and then stack whole layers of first matching layer 12 and second matching layer 13, and then cut the piezoelectric ceramic layer and matching layer stacked on both sides of the backing layer 11, and each relatively independent part after cutting - that is, the array element, includes a matching layer, a piezoelectric ceramic layer and a backing layer 11.
[0043] Another way to set up the ultrasonic transducer 10 is to first set up a whole layer of backing layer 11, and then attach and connect multiple smaller-sized matching layers and piezoelectric ceramic layers that have been stacked together on both sides of the backing layer 11, and then add the backing layer 11 to form an array element.
[0044] On this basis, the ultrasonic transducer 10 in this embodiment includes a plurality of array elements formed by a matching layer, a piezoelectric ceramic layer and a backing layer 11. The piezoelectric ceramic layer in the array element is connected to the electrode wire, and an electrical signal can be input into the piezoelectric ceramic layer through the electrode wire, and converted into a sound wave through the piezoelectric ceramic layer and radiated out, and the sound wave received by the piezoelectric ceramic layer can also be converted into an electrical signal and output through the electrode wire. Further, on both sides of the backing layer 11 are a plurality of first array elements and a plurality of second array elements, and the first array element and the second array element are respectively connected to the first electrode wire and the second electrode wire, without interfering with each other, so as to facilitate relatively independent control of the operation of the first array element and the second array element, thereby facilitating more flexible use and troubleshooting of the ultrasonic transducer 10.
[0045] Furthermore, the ultrasonic transducer 10 further includes a switching device 50 .
[0046] The switching device 50 is electrically connected to the first electrode line and the second electrode line respectively, and is used to switch the first electrode line to transmit a signal or the second electrode line to transmit a signal. Thus, the operator can select the first array element or the second array element on both sides of the backing layer 11 to complete scanning and imaging according to actual conditions, that is, it is convenient for the operator to switch the first array element and the second array element to work separately to detect targets in the positive and negative directions of the ultrasonic transducer 10 respectively.
[0047] For the convenience of the operator, the switching device 50 can be connected to the end of the tube 70 away from the ultrasonic transducer 10. Since each array element is connected to an electrode wire, in order to facilitate the connection, in practice, a plurality of first electrode wires can be gathered together to form a first electrode wire bundle 16, and a plurality of second electrode wires can be gathered together to form a second electrode wire bundle 17, and then the first electrode wire bundle 16 and the second electrode wire bundle 17 are uniformly stored as a transducer wire bundle 40, which is led out from the ultrasonic transducer 10 and connected to the switching device 50.
[0048] The switching device 50 in this embodiment can be any existing structure or device that can realize switching between two lines to be powered on separately or simultaneously.
[0049] Furthermore, the tube body 70 is made of a flexible material, and the ultrasonic catheter further comprises a control knob 60. The control knob 60 is connected to one end of the tube body 70 away from the ultrasonic transducer 10, and the control knob 60 is used to control the bending and deflection of the tube body 70 so that the tube body 70 is suitable for moving in the human body.
[0050] In this embodiment, the ultrasonic transducer 10 is fixedly connected to the tube body 70 , so that the bending and deflection of the tube body 70 can also change the scanning direction of the ultrasonic transducer 10 .
[0051] The specific material selected for the tube body 70 , the specific structure of the control knob 60 and the connection method with the tube body 70 belong to the prior art and will not be described in detail.
[0052] Furthermore, in this embodiment, the frequency of the sound waves emitted by the first array element after being powered on is different from the frequency of the sound waves emitted by the second array element after being powered on.
[0053] For ultrasonic imaging equipment, imaging quality and resolution are proportional to the frequency of the ultrasonic transducer 10, but penetration is inversely proportional to the frequency. The conventional one-dimensional ultrasonic transducer 10 has a relatively single frequency coverage range and cannot take into account both penetration and imaging resolution. In this embodiment, the ultrasonic transducer 10 is capable of double-sided imaging and the frequencies of the first array element and the second array element in the two directions are different, so that the ultrasonic transducer 10 can take into account both penetration and imaging resolution.
[0054] Therefore, in practice, the first array element can be set to a normal frequency or a relatively low frequency, and the second array element can be set to a relatively high frequency. During operation, the side where the first array element is located is first used for preliminary detection. After determining the range of precise scanning, the control switching device 50 is switched to the second array element to perform accurate high-resolution imaging of local lesions.
[0055] The frequency of the sound waves emitted by the array element is related to factors such as the material, specific structure, and density of the array element. The method of changing the frequency of the sound waves emitted by the array element belongs to the existing technology and will not be elaborated here.
[0056] Further, in this embodiment, the number of the first array elements is different from the number of the second array elements.
[0057] For ultrasonic imaging equipment, the more array elements there are, the better the imaging quality and the wider the scanning range, but the cost also increases accordingly and the requirements for the manufacturing process are also higher. In this embodiment, different numbers of first array elements and second array elements can be set on both sides of the backing layer 11 according to actual needs to balance cost and performance.
[0058] Furthermore, in the present embodiment, a matrix array is formed between the plurality of first array elements and between the plurality of second array elements; an array element width of the matrix array formed between the plurality of first array elements is different from an array element width of the matrix array formed between the plurality of second array elements; an array length of the matrix array formed between the plurality of first array elements is different from an array length of the matrix array formed between the plurality of second array elements.
[0059] Generally speaking, when array elements are arranged in a straight line to form an array element column, the length of the arrangement is called the "array element width", and when the array elements are in the form of a matrix array, the length of the array element column is called the "array length". For ultrasound imaging equipment, the larger the size of the array (matrix) composed of array elements, the greater the scanning accuracy, but the smaller the viewing angle range.
[0060] In this embodiment, by setting the matrix array formed between the first array elements and the matrix array formed between the second array elements to have different array element widths and array lengths, the sizes of the arrays formed by the array elements on both sides of the backing layer 11 are different, so that the ultrasonic transducer 10 can balance the scanning accuracy and the imaging viewing angle range.
[0061] For example, in this embodiment, the array element width and array length of the matrix array formed between the first array elements are smaller than the array element width and array length of the matrix array formed between the second array elements, so that the side of the ultrasonic transducer 10 where the first array element is set has a larger viewing angle range, while the side where the second array element is set has a higher scanning accuracy. In practice, the switching device 50 can flexibly select the first array element operation or the second array element operation according to actual needs to meet different requirements for scanning accuracy and imaging viewing angle range.
[0062] Of course, when the array elements are arranged in a straight line to form an array element column, the size can be changed simply by making the array element widths of the array element column formed by the first array element and the second array element different; when the array elements are in the form of a matrix array, the size of the array can also be changed by selectively changing the array element width or the array length.
[0063] In other optional embodiments, the frequency of the sound waves emitted by the first array element after being energized may be set to be the same as the frequency of the sound waves emitted by the second array element after being energized; and / or, when a matrix array is formed between the plurality of first array elements and the plurality of second array elements, the matrix array formed between the plurality of first array elements and the matrix array formed between the plurality of second array elements are symmetrically arranged with respect to the backing layer 11. In this way, the array elements or array element arrays on both sides of the backing layer 11 have the same performance and size, ensuring that the imaging viewing angle and imaging quality on both sides of the ultrasonic transducer 10 are the same, and manufacturing is convenient.
[0064] In addition, in this embodiment, the backing layer 11 is integrally formed of a material that can absorb sound waves, thereby simplifying the manufacturing difficulty of the backing layer 11 itself; at the same time, the first piezoelectric ceramic layer 14 in the first array element and the second piezoelectric ceramic layer 15 in the second array element share the same backing layer 11, so that the thickness of the backing layer 11 can be reduced.
[0065] In other optional embodiments, the backing layer 11 may be formed by stacking and bonding multiple layers of materials that can absorb sound waves. Therefore, when the ultrasonic transducer 10 is actually manufactured, the first array element may be connected to a certain layer (or some layers), and the second array element may be connected to other layers, and then the multiple layers of materials that can absorb sound waves may be stacked and bonded to form a complete ultrasonic transducer 10. That is, the connection of the first array element and the connection of the second array element do not affect each other, which can improve the manufacturing efficiency.
[0066] The specific materials used for the backing layer 11, the piezoelectric ceramic layer and the matching layer and the connection method between the layers belong to the prior art and will not be described in detail.
[0067] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.
Claims
1. An ultrasonic transducer, characterized in that: It includes a backing layer, a first matching layer, a second matching layer, a first piezoelectric ceramic layer and a second piezoelectric ceramic layer; Along the direction away from the backing layer, the first piezoelectric ceramic layer and the first matching layer are sequentially stacked on one side of the backing layer, and the second piezoelectric ceramic layer and the second matching layer are sequentially stacked on the other side of the backing layer; The ultrasonic transducer comprises a plurality of the first matching layers, a plurality of the second matching layers, a plurality of the first piezoelectric ceramic layers, and a plurality of the second piezoelectric ceramic layers; Any of the first matching layers and the first piezoelectric ceramic layer and the backing layer stacked therewith form a first array element; Any of the first array elements is connected to a first electrode line, and the first electrode line is electrically connected to the first piezoelectric ceramic layer; Any of the second matching layers and the second piezoelectric ceramic layer and the backing layer stacked therewith form a second array element; Any of the second array elements is connected to a second electrode line, and the second electrode line is electrically connected to the second piezoelectric ceramic layer.
2. The ultrasonic transducer according to claim 1, characterized in that: The ultrasonic transducer also includes a switching device; The switching device is electrically connected to the first electrode line and the second electrode line respectively, and is used to switch between the first electrode line transmitting a signal or the second electrode line transmitting a signal.
3. The ultrasonic transducer according to claim 1, characterized in that: The frequency of the sound waves emitted by the first array element after being energized is different from the frequency of the sound waves emitted by the second array element after being energized.
4. The ultrasonic transducer according to claim 1, characterized in that: The number of the first array elements is different from the number of the second array elements.
5. The ultrasonic transducer according to claim 1, characterized in that: A matrix array is formed between the plurality of the first array elements and between the plurality of the second array elements; An array element width of a matrix array formed by a plurality of the first array elements is different from an array element width of a matrix array formed by a plurality of the second array elements; and / or, An array length of a matrix array formed by a plurality of the first array elements is different from an array length of a matrix array formed by a plurality of the second array elements.
6. The ultrasonic transducer according to claim 1, characterized in that: The frequency of the sound waves emitted by the first array element after being powered on is the same as the frequency of the sound waves emitted by the second array element after being powered on; and / or, A matrix array is formed between the plurality of first array elements and between the plurality of second array elements, and the matrix array formed between the plurality of first array elements and the matrix array formed between the plurality of second array elements are symmetrically arranged with respect to the backing layer.
7. The ultrasonic transducer according to claim 1, characterized in that: The backing layer is integrally formed of a material capable of absorbing sound waves, or the backing layer is formed by laminating and bonding multiple layers of materials capable of absorbing sound waves.
8. An ultrasonic catheter, characterized in that: It comprises a tube body and an ultrasonic transducer as claimed in any one of claims 1 to 7; The ultrasonic transducer is arranged at one end of the tube body.
9. The ultrasonic catheter according to claim 8, characterized in that The tube body is made of flexible material; The ultrasonic catheter further comprises a control knob, wherein the control knob is connected to one end of the tube body away from the ultrasonic transducer, and the control knob is used to control the bending and deflection of the tube body.