A high power ultrasonic focusing transducer with adjustable focus

Abstract

The application discloses a high-power ultrasonic focusing transducer with adjustable focus, belongs to the technical field of transducers, and relates to a concentric ring built-in nonlinear acoustic field focusing system, the nonlinear acoustic field focusing system is electrically connected with the concentric ring piezoelectric element, the nonlinear acoustic field focusing system provides a driving electric signal for the concentric ring piezoelectric element, sound waves are generated on the ceramic sheet, the sound waves emitted by adjacent ceramic sheets cross to form a focus point focusing on the pathological tissue, and dynamic superposition of multi-frequency signals is generated. Different moving depths of the ceramic sheets moving simultaneously are used to break the focus point formed by the sound waves emitted by the originally static ceramic sheets and to generate a combined focus point of multiple frequencies again, so that dynamic enhancement of the focus points at different depths is realized. The application not only realizes focusing on pathological tissues at different depths, but also realizes more accurate and stronger focusing, and the pathological ablation effect is better.

Description

Technical Field

[0001] This invention relates to the field of transducer technology, specifically to a high-power ultrasonic focusing transducer with adjustable focus. Background Technology

[0002] High-power focused ultrasound technology has important applications in medical treatment, especially in ultrasound ablation and tumor treatment. It achieves non-invasive ablation by precisely focusing high-energy ultrasound waves onto diseased tissue. However, existing focused ultrasound transducers have significant shortcomings in multi-depth focusing and high-power output:

[0003] 1. Single spherical focusing transducer: It can only produce focusing at a fixed depth, which cannot adapt to the treatment needs of lesions at different depths, thus limiting the flexibility and applicability of treatment;

[0004] 2. Phased array transducers: Although they possess a certain depth focusing capability, the limited power output of each array unit makes it difficult to achieve effective focusing under high power conditions. Furthermore, the complex control circuitry increases system complexity and heat dissipation issues, reducing equipment reliability.

[0005] 3. Mechanical displacement focusing transducer: The position of the transducer is adjusted mechanically to achieve physical adjustment of the focal point. However, the mechanical structure is complex and easily affected by temperature changes, making it difficult to maintain long-term stable performance in high-power medical applications.

[0006] The shortcomings of the aforementioned technologies make it difficult for existing high-power ultrasonic focusing transducers to meet the needs of medical treatment for multi-depth, high-power, and precise focusing. Summary of the Invention

[0007] To address the technical problems mentioned in the background section, the present invention provides a high-power ultrasonic focusing transducer with adjustable focus, employing the following technical solution:

[0008] include:

[0009] A concentric ring, on which multiple concentric ring piezoelectric elements are arranged, the concentric ring piezoelectric elements include ceramic rings and ceramic plates, the ceramic rings are fixedly connected to the ceramic plates, and each ceramic plate has a different radius;

[0010] The nonlinear sound field focusing system is built into a concentric ring and is electrically connected to the concentric ring piezoelectric element. The nonlinear sound field focusing system provides a driving electrical signal to the concentric ring piezoelectric element, causing the ceramic plate to emit sound waves. The sound waves emitted by adjacent ceramic plates intersect to form a focal point focused on the lesion tissue, generating a dynamic superposition of multi-frequency signals. Since the depth of each concentric ring piezoelectric element on the transducer is different, more focal points can be formed on lesion tissues at different depths.

[0011] The control circuit is electrically connected to the nonlinear sound field focusing system and provides power to the nonlinear sound field focusing system.

[0012] A rotary telescopic focusing mechanism is mounted on a concentric ring, and a concentric ring-type piezoelectric element is fixed on the rotary telescopic focusing mechanism. This mechanism is used to adjust the depth position of the concentric ring-type piezoelectric element along the axial direction to achieve micron-level focus depth adjustment.

[0013] By combining control circuits, a nonlinear acoustic field focusing system, and a rotary telescopic focusing mechanism, multi-depth precise focusing of multiple concentric ring piezoelectric elements under high power conditions is achieved, meeting the needs of efficient ablation of lesions at different depths in medical treatment.

[0014] Furthermore, the rotary telescopic focusing mechanism includes a driving component, a limiting component, and multiple rotating components arranged at different depths on a concentric ring. The driving component is meshed with the rotating components on both sides, the rotating components are movably connected to the limiting component, and the rotating components are meshed with each other. The driving component includes a micro motor fixed on the concentric ring, a gear shaft connected to the micro motor, a connecting gear connected to the gear shaft, and rotating components meshing with each other on both sides of the connecting gear.

[0015] The limiting component is a limiting groove fixed on the concentric ring;

[0016] The rotating component includes a push plate that is slidably connected in a limiting groove. The push plate has a threaded hole, and a threaded rod is rotatably connected in the threaded hole. A bearing is provided on the concentric ring. One end of the threaded rod is connected to the bearing. A gear is also provided on the threaded rod. The gear meshes with a connecting gear. The gears on adjacent threaded rods mesh with each other. The diameter of the gear on each rotating component is different. A ceramic ring belt is connected to the end of the threaded rod.

[0017] Ensure that the depth position adjustment of the concentric ring piezoelectric element is within the preset range to prevent over-adjustment from causing focusing inaccuracy.

[0018] Furthermore, the nonlinear sound field focusing system achieves dynamic enhancement of focusing points at different depths by adjusting the frequency combination of multiple concentric ring piezoelectric elements.

[0019] Furthermore, the concentric ring-type piezoelectric element is made of high-temperature resistant and fatigue-resistant piezoelectric ceramic material to adapt to long-term high-power operation conditions.

[0020] Furthermore, the independent control circuit is configured to adjust the power output of each concentric ring-type piezoelectric element according to treatment needs, so as to achieve precise ablation of lesions at different depths.

[0021] Furthermore, the rotating component can achieve depth adjustment with micron-level precision to meet high-precision focusing requirements.

[0022] Furthermore, the transducer is equipped with an active cooling system to maintain temperature stability under high-power operating conditions, thereby improving the system's stability and durability.

[0023] Furthermore, the nonlinear sound field focusing system works in conjunction with the rotary telescopic focusing mechanism to optimize the sound field interference effect and enhance focusing accuracy and efficiency.

[0024] Furthermore, the number and size of the concentric ring piezoelectric elements can be customized according to specific medical application needs to adapt to different treatment depths and ranges.

[0025] Furthermore, the transducer is applicable to medical fields such as ultrasound ablation and tumor treatment, enabling non-invasive and precise treatment of diseased tissues through multi-depth, high-power focused ultrasound waves.

[0026] This invention has the following advantages: It combines a nonlinear acoustic field focusing system and a rotary telescopic focusing mechanism to achieve multi-depth precise focusing under high power conditions. By emitting acoustic fields of varying intensities from strong to weak through ceramic plates of different diameters, the intensity of each focal point in the acoustic field is no longer fixed, generating multi-layered focusing. The different diameters of the gears in the rotary telescopic focusing mechanism allow for varying depths of movement of the concentric ring-shaped piezoelectric element. This makes the focal depth adjustment more flexible and precise, enabling more extensive focusing of lesions and achieving dynamic enhancement of focal points at different depths. The transducer features a simple structure, convenient operation, and high stability, meeting the high-efficiency ablation requirements for lesions at different depths in medical treatment, and is of great significance for improving the effectiveness and efficiency of medical ultrasound therapy.

[0027] Precision treatment: It achieves multi-depth, high-power ultrasound focusing, which can precisely ablate lesions at different depths and reduce the impact on surrounding healthy tissues.

[0028] High efficiency and stability: The simple structure reduces complex mechanical and electrical systems, improving the stability and durability of the equipment, making it suitable for long-term high-power operation.

[0029] Easy to operate: The rotary telescopic focusing mechanism makes focus adjustment more flexible and precise, and is easy to operate and apply in clinical settings. Attached Figure Description

[0030] Figure 1 This is a top view of the cross section of the present invention;

[0031] Figure 2 This is a schematic diagram of the concentric ring mechanism of the present invention;

[0032] Figure 3 This is a front view of the concentric ring cross-section of the present invention.

[0033] Attached Figures: 1. Concentric Ring, 2. Ceramic Ring Belt, 3. Ceramic Sheet, 4. Micro Motor, 5. Gear Shaft, 6. Connecting Gear, 7. Limiting Slide, 8. Push Plate, 9. Threaded Hole, 10. Threaded Rod, 11. Bearing, 12. Gear. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please refer to Figure 1-3 This invention provides a high-power ultrasonic focusing transducer with adjustable focus, comprising:

[0036] Concentric ring 1 serves as the carrier of the entire transducer. Multiple concentric ring piezoelectric elements are set on the concentric ring 1. The concentric ring piezoelectric elements include ceramic ring 2 and ceramic sheet 3. Ceramic sheet 3 is fixedly connected to the ceramic ring 2. Each ceramic sheet 3 has a different radius and can emit sound waves of different intensities.

[0037] The nonlinear sound field focusing system has a built-in nonlinear sound field focusing system in the concentric ring 1. The nonlinear sound field focusing system is electrically connected to the concentric ring piezoelectric element. The nonlinear sound field focusing system provides a driving electrical signal to the concentric ring piezoelectric element, causing the ceramic plate 3 to emit sound waves. The sound waves emitted by adjacent ceramic plates 3 intersect to form a focal point focused on the lesion tissue, generating a dynamic superposition of multi-frequency signals. Since the depth of each concentric ring piezoelectric element on the transducer is different, more focal points can be formed on lesion tissues at different depths.

[0038] It is worth noting that the combination of nonlinear sound field focusing system and concentric ring piezoelectric element is a prior art transducer technology. The nonlinear sound field focusing system includes a controller, a multi-frequency signal generator, etc. It mainly outputs waves of different frequencies from each ceramic plate through the signal generator, which are then output to the transducer after passing through a power amplifier. This will not be elaborated here.

[0039] The control circuit is electrically connected to the nonlinear sound field focusing system, providing power to the nonlinear sound field focusing system so that the nonlinear sound field focusing system can drive the ceramic plate 3 to emit sound waves.

[0040] A rotary telescopic focusing mechanism is set on a concentric ring 1. A concentric ring-type piezoelectric element is fixed on the rotary telescopic focusing mechanism and is used to adjust the depth position of the concentric ring-type piezoelectric element along the axial direction to achieve micron-level focus depth adjustment.

[0041] By combining control circuits, a nonlinear acoustic field focusing system, and a rotary telescopic focusing mechanism, multi-depth precise focusing of multiple concentric ring piezoelectric elements under high power conditions is achieved, meeting the needs of efficient ablation of lesions at different depths in medical treatment.

[0042] The rotary telescopic focusing mechanism includes a driving component, a limiting component, and multiple rotating components arranged at different depths on a concentric ring. The driving component and the rotating components on both sides are meshed and connected. The rotating components and the limiting component are movably connected. The rotating components are meshed and connected to each other. The driving component includes a micro motor 4 fixed on the concentric ring 1. A gear shaft 5 is connected to the micro motor 4. A connecting gear 6 is connected to the gear shaft 5. The micro motor 4 drives the gear shaft 5 to rotate. The gear shaft 5 drives the connecting gear 6 to rotate. Rotating components are meshed and connected to both sides of the connecting gear 6.

[0043] The limiting component is a limiting groove 7 fixed on the concentric ring 1;

[0044] The rotating component includes a push plate 8 slidably connected in a limiting groove 7. The push plate 8 has a threaded hole 9, and a threaded rod 10 is rotatably connected in the threaded hole 9. A bearing 11 is provided on the concentric ring 1. One end of the threaded rod 10 is connected to the bearing 11. A gear 12 is also provided on the threaded rod 10. The gear 12 meshes with a connecting gear 6. The connecting gear 6 drives the gear 12 to rotate. The gear 12 drives the threaded rod 10 to rotate in the threaded hole 9, causing the push plate 8 to move upward in the limiting groove 7. The push plate 8 drives the ceramic ring belt 2 and the ceramic plate 3 to move upward. The gears 12 on adjacent threaded rods 10 mesh with each other. The diameter of the gears 12 on each rotating component is different. The end of the threaded rod 10 is connected to the ceramic ring belt 2.

[0045] Ensure that the depth position adjustment of the concentric ring piezoelectric element is within the preset range to prevent over-adjustment from causing focusing inaccuracy.

[0046] The nonlinear sound field focusing system achieves dynamic enhancement of focusing points at different depths by adjusting the frequency combination of multiple concentric ring piezoelectric elements.

[0047] Concentric ring piezoelectric elements are made of high-temperature and fatigue-resistant piezoelectric ceramic materials to adapt to long-term high-power operation conditions. The number and size of concentric ring piezoelectric elements can be customized according to treatment needs to cover the required range of treatment depths.

[0048] The control circuit is configured to adjust the power output of each concentric ring-type piezoelectric element according to the treatment needs, so as to achieve precise ablation of lesions at different depths.

[0049] The rotating component enables depth adjustment of the ceramic plate with a precision of 3 micrometers to meet high-precision focusing requirements.

[0050] The transducer is equipped with an active cooling system to maintain temperature stability under high-power operating conditions, thereby improving the stability and durability of the system.

[0051] The transducer is suitable for medical fields such as ultrasound ablation and tumor treatment. It uses multi-depth, high-power focused ultrasound waves to achieve non-invasive and precise treatment of diseased tissues.

[0052] Working principle of the invention:

[0053] Focus Preset: Based on the depth distribution of the patient's lesion tissue, the operator starts the micro motor 4, which drives the gear shaft 5 to rotate. The gear shaft 5 drives the connecting gear 6 to rotate, which in turn drives the gears 12 on both sides to rotate. The gears 12 drive the threaded rod 10 to rotate on the bearing 11. The threaded rod 10 rotates within the threaded hole 9, causing the push plate 8 to move upward within the limiting groove 7. The push plate 8 drives the ceramic ring belt 2 and ceramic sheet 3 to move upward axially. Because the diameters of the gears 12 of each concentric ring pressure element are different, the number of rotations of each threaded rod 10 is different, and the movement depth of each ceramic sheet 3 is different. By adjusting the depth position of each ceramic sheet 3, the focal point formed by the intersection of their emitted sound fields is aligned with the corresponding lesion tissue layer. Through the different movement depths of each ceramic sheet 3 moving simultaneously, the focal point formed by the sound waves emitted by the originally static ceramic sheet 3 acting on the lesion tissue is disrupted, and a multi-frequency combined focal point is regenerated. This achieves dynamic enhancement of the focal point at different depths, not only achieving focusing on lesion tissues at different depths, but also making the focusing more precise, the focusing intensity greater, and the lesion ablation effect better.

[0054] Parameter settings: The power output and operating frequency of each concentric ring piezoelectric element are set through the control circuit to ensure that sufficient energy is provided for ablation at different depths.

[0055] Treatment initiation: The nonlinear sound field focusing system is activated by a multi-frequency signal generator and controller, causing each ceramic plate 3 to emit a sound field. By dynamically superimposing the multi-frequency signals (sound field), an enhanced focusing effect is formed at the target depth, while high-power ultrasound ablation is performed on lesions at different depths.

[0056] Real-time monitoring: During the treatment process, imaging equipment is used to monitor the treatment effect in real time, and the power output and focus position of each ring are adjusted as necessary to ensure the safety and effectiveness of the treatment.

[0057] This invention is simple to operate, convenient to use, and suitable for widespread promotion and application. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-power ultrasonic focusing transducer with adjustable focus, characterized in that, include: Concentric ring (1), multiple concentric ring piezoelectric elements are provided on the concentric ring (1), the concentric ring piezoelectric elements include ceramic ring (2) and ceramic sheet (3), ceramic sheet (3) is fixedly connected on the ceramic ring (2), each ceramic sheet (3) has a different radius; The nonlinear sound field focusing system is built into the concentric ring (1). The nonlinear sound field focusing system is electrically connected to the concentric ring piezoelectric element. The nonlinear sound field focusing system provides a driving electrical signal to the concentric ring piezoelectric element, so that the ceramic plate (3) emits sound waves. The sound waves emitted by adjacent ceramic plates (3) intersect to form a focal point focused on the lesion tissue, generating a dynamic superposition of multi-frequency signals. Since the depth of each concentric ring piezoelectric element on the transducer is different, more focal points are formed on lesion tissues at different depths. The control circuit is electrically connected to the nonlinear sound field focusing system and provides power to the nonlinear sound field focusing system. The rotary telescopic focusing mechanism is set on the concentric ring (1), and the concentric ring belt piezoelectric element is fixed on the rotary telescopic focusing mechanism to adjust the depth position of the concentric ring belt piezoelectric element along the axial direction in order to achieve micron-level focus depth adjustment. By combining control circuits, a nonlinear acoustic field focusing system, and a rotary telescopic focusing mechanism, multi-depth precise focusing of multiple concentric ring piezoelectric elements under high power conditions is achieved, meeting the needs of efficient ablation of lesions at different depths in medical treatment. The rotary telescopic focusing mechanism includes a driving component, a limiting component, and multiple rotating components arranged at different depths on a concentric ring. The driving component and the rotating components on both sides are meshed and connected. The rotating components and the limiting component are movably connected. The rotating components are meshed and connected to each other. The driving component includes a micro motor (4) fixed on the concentric ring (1). A gear shaft (5) is connected to the micro motor (4). A connecting gear (6) is connected to the gear shaft (5). Rotating components are meshed and connected to both sides of the connecting gear (6). The limiting component is a limiting groove (7) fixed on the concentric ring (1); The rotating component includes a push plate (8) that is slidably connected in a limiting groove (7). A threaded hole (9) is provided in the push plate (8). A threaded rod (10) is rotatably connected in the threaded hole (9). A bearing (11) is provided on the concentric ring (1). One end of the threaded rod (10) is connected to the bearing (11). A gear (12) is also provided on the threaded rod (10). The gear (12) meshes with the connecting gear (6). The gears (12) on adjacent threaded rods (10) mesh with each other. The diameter of the gear (12) on each rotating component is different. A ceramic ring belt (2) is connected to the end of the threaded rod (10).

2. The adjustable-focus high-power ultrasonic focusing transducer according to claim 1, characterized in that, The nonlinear sound field focusing system achieves dynamic enhancement of focusing points at different depths by adjusting the frequency combination of multiple concentric ring piezoelectric elements.

3. The adjustable-focus high-power ultrasonic focusing transducer according to claim 1, characterized in that, Concentric ring-type piezoelectric elements are made of high-temperature resistant and fatigue-resistant piezoelectric ceramic materials to adapt to long-term high-power operation conditions.

4. The adjustable-focus high-power ultrasonic focusing transducer according to claim 1, characterized in that, The control circuit is configured to adjust the power output of each concentric ring-type piezoelectric element according to the treatment needs, so as to achieve precise ablation of lesions at different depths.

5. The adjustable-focus high-power ultrasonic focusing transducer according to claim 1, characterized in that, The transducer is equipped with an active cooling system to maintain temperature stability under high-power operating conditions, thereby improving the stability and durability of the system.

6. The adjustable-focus high-power ultrasonic focusing transducer according to claim 1, characterized in that, The number and size of concentric ring piezoelectric elements can be customized according to specific medical application needs to adapt to different treatment depths and ranges.

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