A multi-channel integrated device for ultrasonic ceramic impedance matching

Abstract

The utility model relates to a kind of for ultrasonic ceramic impedance matching multi-channel integrated device, including integrated bottom plate, wherein, integrated bottom plate is provided with impedance matching input end and impedance matching output end, multiple parallel impedance parameter matching plates are connected between impedance matching input end and impedance matching output end, impedance matching input end is connected with drive circuit, impedance matching output end is connected with piezoelectric ceramic sheet.Compared with prior art, the utility model uses the design of integrated impedance parameter matching plate, by setting impedance matching input end and impedance matching output end on integrated bottom plate, connecting multiple parallel impedance parameter matching plates between impedance matching input end and impedance matching output end, to realize the purpose of multi-channel impedance matching, in the case where load impedance changes, it can be dynamically adapted to different impedance matching, and greatly reduce the volume space of entire device, it is beneficial to actual production and application.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a multi-channel integrated device for ultrasonic ceramic impedance matching. Background Technology

[0002] Focused ultrasound therapy utilizes phased-array ultrasound waves. Through magnetic resonance imaging (MRI), the location, size, and temperature of the lesion area are observed in real time. The ultrasound waves are then focused within the body, resonating to generate heat and ablate the lesion tissue, achieving a non-invasive treatment effect. An ultrasound transducer is a device that converts electrical energy into ultrasonic energy. It mainly consists of piezoelectric ceramics and metal electrodes. Ultrasonic waves are generated by the property of piezoelectric ceramics to deform under the influence of an electric field. When the electrodes are removed or a reverse voltage is applied, the deformation of the piezoelectric ceramic returns. When a specific frequency is applied to both ends of the ceramic sheet, the piezoelectric ceramic sheet will produce mechanical deformation of the same frequency. By placing a medium that conducts mechanical waves, such as water, oil, or a solid, into the piezoelectric ceramic, the mechanical waves generated by the ceramic sheet can be transmitted to the desired target. The electrical resistance that the ultrasonic signal must overcome during the transmission from the piezoelectric ceramic to the medium is called the ultrasonic ceramic impedance.

[0003] To ensure energy transmission efficiency and signal reception quality, the impedance of the ultrasonic ceramic needs to be fully matched with the impedance of the surrounding medium. Most existing impedance matching technologies use transformers and LC networks, which results in large size and heavy weight of the matching device, which is not conducive to production and application. In addition, LC network matching is only suitable for a single resonant frequency load. When the load changes, the matching network parameters need to be adjusted accordingly, which cannot solve the problem of dynamic matching. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multi-channel integrated device for ultrasonic ceramic impedance matching that can dynamically adapt to different impedance matching.

[0005] The objective of this utility model can be achieved through the following technical solution: a multi-channel integrated device for ultrasonic ceramic impedance matching, comprising an integrated base plate, wherein an impedance matching input terminal and an impedance matching output terminal are provided on the integrated base plate, and multiple parallel impedance parameter matching plates are connected between the impedance matching input terminal and the impedance matching output terminal, wherein the impedance matching input terminal is connected to a driving circuit, and the impedance matching output terminal is connected to a piezoelectric ceramic sheet.

[0006] Furthermore, the multiple parallel impedance matching boards are mounted on the integrated base plate via plug-in connectors.

[0007] Furthermore, the multiple parallel impedance parameter matching plates are arranged in a matrix on the integrated base plate.

[0008] Furthermore, the impedance matching board is equipped with two matching circuits for impedance matching of the two loads.

[0009] Furthermore, the impedance matching input terminal includes two ultrasonic channel input boards that are plugged into the integrated base plate.

[0010] Furthermore, the impedance matching output terminal includes an ultrasonic channel output board that is plugged into the integrated base plate.

[0011] Furthermore, the driving circuit is connected to the corresponding interface on the ultrasonic channel input board via a first coaxial cable.

[0012] Furthermore, the interface on the ultrasonic channel output board is connected to the piezoelectric ceramic sheet via a second coaxial line.

[0013] Furthermore, the first coaxial cable is specifically a 1.5M 50Ω coaxial cable.

[0014] Furthermore, the second coaxial cable is specifically a 10M 75Ω coaxial cable.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This invention adopts an integrated impedance matching plate design. By setting impedance matching input and output terminals on the integrated base plate, and connecting multiple parallel impedance matching plates between the impedance matching input and output terminals, the purpose of multi-channel impedance matching can be achieved. Even if the load impedance changes, it can dynamically adapt to different impedance matching, and greatly reduce the overall size of the device, making it convenient for actual production and application.

[0017] This invention integrates multiple parallel impedance matching boards mounted on an integrated baseboard via plug-in connectors. The impedance matching input is designed as two ultrasonic channel input boards plugged into the integrated baseboard, and the impedance matching output is designed as one ultrasonic channel output board plugged into the integrated baseboard. The drive circuit is connected to the corresponding interface on the ultrasonic channel input board via a first coaxial cable, and the interface on the ultrasonic channel output board is connected to the piezoelectric ceramic plate via a second coaxial cable. This method of integrating the baseboard and single-board plug-in assembly with integrated wiring allows for reliable integration of all functional units onto the baseboard, enabling data signal input and output. It offers advantages such as simple installation and reliable performance.

[0018] This invention features two matching circuits on each impedance matching board, which can respectively correspond to the impedance matching of two loads, thereby effectively utilizing space and enabling one impedance matching board to achieve impedance matching of two loads, thus improving the expandability of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of LC network matching in this utility model;

[0021] Explanation of markings in the diagram:

[0022] 1. Integrated base plate; 2. Impedance matching input terminal; 3. Impedance matching output terminal; 4. Impedance parameter matching board. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] Example

[0025] like Figure 1 As shown, a multi-channel integrated device for ultrasonic ceramic impedance matching includes an integrated base plate 1. The integrated base plate 1 is provided with an impedance matching input terminal 2 and an impedance matching output terminal 3. The impedance matching input terminal 2 includes two ultrasonic channel input boards plugged into the integrated base plate 1, and the impedance matching output terminal 3 includes an ultrasonic channel output board plugged into the integrated base plate 1. The impedance matching input terminal 2 is connected to a driving circuit, and the impedance matching output terminal 3 is connected to a piezoelectric ceramic sheet. Multiple parallel impedance parameter matching boards 4 are connected between the impedance matching input terminal 2 and the impedance matching output terminal 3.

[0026] Multiple parallel impedance matching boards 4 are mounted on the integrated base plate 1 via plug-in connectors and arranged in a matrix on the integrated base plate 1. Each impedance matching board 4 is equipped with two matching circuits for impedance matching of two corresponding loads.

[0027] In this embodiment, the load is a transducer, which is driven by a Class D or Class E power amplifier. The impedance parameters of the transducer load need to be matched so that all the output power is applied to the load, thereby improving the output efficiency of the drive circuit.

[0028] This embodiment applies the above solution and integrates it into the load matching circuit. By integrating 128 channels into the matching circuit, the overall space of the device is optimized.

[0029] The drive circuit generates low-voltage AC power from a low-voltage DC inverter. According to U2 / R, it is necessary to match the capacitive and inductive loads to the purely resistive loads, thereby maximizing the efficiency of converting the output power into acoustic power.

[0030] The matching box integration is completed using single-channel matching, and finally integrated into the overall chassis assembly. It is formed into a module through wiring integration. Single-channel impedance matching uses LC network matching (e.g., Figure 2 As shown, two inductors are used, one in the drive link loop and the other in the loop, which also serves to filter out common-mode interference. The impedance matching of a single path is finally designed as a separate PCBA circuit board, which is connected to the integrated baseboard through a connector. Two matching circuits are set on each matching board to provide impedance matching for the two loads.

[0031] The internal circuitry of the enclosure is assembled using a baseboard and single-board plug-in components, which can integrate all units into one unit and output and input to the outside through connectors, thus providing a matching connection function.

[0032] In addition, the drive circuit is connected to the corresponding interface on the ultrasonic channel input board via a 1.5M 50Ω coaxial cable, and the interface on the ultrasonic channel output board is connected to the piezoelectric ceramic sheet via a 10M 75Ω coaxial cable.

[0033] In summary, this solution proposes an integrated multi-channel impedance matching scheme. By setting impedance matching input and output terminals on the integrated base plate, and connecting multiple parallel impedance parameter matching boards between the impedance matching input and output terminals, the purpose of multi-channel impedance matching is achieved. This solves the dynamic power matching problem of multi-channel piezoelectric ceramic sheets and can be conveniently and reliably applied in practice.

Claims

1. A multi-channel integrated device for ultrasonic ceramic impedance matching, characterized in that, The system includes an integrated base plate (1), on which an impedance matching input terminal (2) and an impedance matching output terminal (3) are provided. Multiple parallel impedance parameter matching plates (4) are connected between the impedance matching input terminal (2) and the impedance matching output terminal (3). The impedance matching input terminal (2) is connected to a driving circuit, and the impedance matching output terminal (3) is connected to a piezoelectric ceramic sheet.

2. The multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 1, characterized in that, The multiple parallel impedance parameter matching boards (4) are respectively mounted on the integrated base plate (1) via plug-in connectors.

3. The multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 1, characterized in that, The multiple parallel impedance parameter matching plates (4) are arranged in a matrix on the integrated base plate (1).

4. A multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 1, characterized in that, The impedance parameter matching board (4) is equipped with two matching circuits for impedance matching of the two loads.

5. A multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 1, characterized in that, The impedance matching input terminal (2) includes two ultrasonic channel input boards that are plugged into the integrated base plate (1).

6. A multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 1, characterized in that, The impedance matching output terminal (3) includes an ultrasonic channel output board that is plugged into the integrated base plate (1).

7. A multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 5, characterized in that, The drive circuit is connected to the corresponding interface on the ultrasonic channel input board via a first coaxial cable.

8. A multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 6, characterized in that, The interface on the ultrasonic channel output board is connected to the piezoelectric ceramic sheet via a second coaxial line.

9. A multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 7, characterized in that, The first coaxial cable is specifically a 1.5M 50Ω coaxial cable.

10. A multi-channel integrated device for ultrasonic ceramic impedance matching according to claim 8, characterized in that, The second coaxial cable is specifically a 10M 75Ω coaxial cable.

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