阅读说明：本技术 相控聚焦的多通道超声驱动电路及多通道超声治疗仪 (Phase-controlled focusing multi-channel ultrasonic driving circuit and multi-channel ultrasonic therapeutic apparatus ) 是由 李可 黄尹 董军挥 杜谚明 冯海友 朱威桢 于 2021-09-08 设计创作，主要内容包括：本发明提供了一种相控聚焦的多通道超声驱动电路及多通道超声治疗仪。该超声驱动电路包括驱动单元电路板以及母板。该驱动单元电路板包括多通道驱动电路。该母板包括：多个驱动单元插槽；信号发生模块,经由印制的输入信号总线连接各该驱动单元插槽；驱动输出插槽,经由印制的输出信号总线连接各该驱动单元插槽,并用于插接多路该超声换能片的插头；以及主控制器,连接各该驱动单元插槽以及该信号发生模块,并通信连接上位机,根据该上位机提供的上位机指令控制该信号发生模块生成多通道相位信号,并控制对应的驱动单元电路板生成多个对应相位的输出信号,再经由该驱动输出插槽向各路该超声换能片并行输出对应相位的驱动信号。(The invention provides a phase-control focusing multi-channel ultrasonic driving circuit and a multi-channel ultrasonic therapeutic apparatus. The ultrasonic drive circuit comprises a drive unit circuit board and a motherboard. The drive unit circuit board includes a multi-channel drive circuit. The motherboard includes: a plurality of drive unit slots; the signal generating module is connected with each driving unit slot through a printed input signal bus; the driving output slots are connected with the driving unit slots through printed output signal buses and are used for being plugged with a plurality of plugs of the ultrasonic energy conversion sheets; and the main controller is connected with each driving unit slot and the signal generating module, is in communication connection with an upper computer, controls the signal generating module to generate a multi-channel phase signal according to an upper computer instruction provided by the upper computer, controls the corresponding driving unit circuit board to generate a plurality of output signals corresponding to the phases, and outputs driving signals corresponding to the phases to each ultrasonic transducer in parallel through the driving output slots.)

1. A phase-controlled focused multi-channel ultrasound driver circuit, comprising:

the ultrasonic transducer comprises at least one driving unit circuit board, wherein each driving unit circuit board comprises a plurality of channels of driving circuits connected in parallel, and each channel of driving circuit is used for driving at least one path of ultrasonic transducer; and

a motherboard, comprising:

the driving unit slots are used for plugging the at least one driving unit circuit board;

the signal generating module is connected with the first input interface of each drive unit slot through an input signal bus printed on the motherboard;

the driving output slots are connected with the first output interfaces of the driving unit slots through output signal buses printed on the motherboard and are used for being plugged with a plurality of paths of plugs of the ultrasonic energy conversion sheets; and

the main controller is connected with the second input interface of each driving unit slot and the signal generation module, is connected with an upper computer in a communication mode and is configured to: and controlling the signal generation module to generate multi-channel phase signals according to an upper computer instruction provided by the upper computer, controlling at least one corresponding driving unit circuit board to generate a plurality of output signals corresponding to the phases through at least one driving unit slot, and outputting driving signals corresponding to the phases to all the ultrasonic energy conversion sheets in parallel through the driving output slot.

2. The multi-channel ultrasonic drive circuit of claim 1, wherein each channel of the drive circuit comprises a voltage regulator circuit and a power amplifier circuit, wherein,

the input end of the voltage regulating circuit is connected with the second input interface of the corresponding driving unit slot through the plug of the driving unit circuit board, and outputs direct current voltage with corresponding amplitude according to the control signal provided by the main controller,

the control end of the power amplification circuit is connected with the first input interface of the corresponding driving unit slot through the plug of the driving unit circuit board, and generates an output signal of a corresponding phase according to the phase signal of the corresponding channel generated by the signal generation module.

3. The multi-channel ultrasonic drive circuit of claim 2, wherein each of the drive unit circuit boards further comprises a sub-controller, the sub-controller is connected to the input terminal of the voltage regulating circuit of each of the channels, and is connected to the second input interface of the corresponding drive unit socket via the plug of the drive unit circuit board,

and the main controller respectively sends control signals to corresponding sub-controllers through the second input interfaces of the driving unit slots, and the sub-controllers respectively control the voltage regulating circuits of the corresponding multi-channel driving circuits to output direct-current voltages with corresponding amplitudes according to the control signals.

4. The multi-channel ultrasonic driver circuit of claim 3, wherein each channel of the driver circuit further comprises a power detection circuit, an input terminal of the power detection circuit is connected to an output terminal of the power amplification circuit of the corresponding channel, an output terminal of the power detection circuit is connected to the first output interface of the corresponding driver unit socket via a plug of the driver unit circuit board,

the sub-controllers are respectively connected with the output ends of the power detection circuits of the driving circuits of all channels and are connected with second output interfaces of corresponding driving unit slots through plugs of the driving unit circuit boards,

and the main controller acquires a plurality of output signals generated by the driving circuit of each channel through a second output interface of each driving unit slot and uploads each output signal to the upper computer.

5. The multi-channel ultrasonic drive circuit of claim 2, wherein the power amplification circuit comprises an integrated half-bridge circuit and a half-bridge drive circuit.

6. The multi-channel ultrasonic driving circuit as claimed in claim 2, wherein the power amplifying circuit comprises at least one power tube, the welding point of the at least one power tube on the driving unit circuit board is a through hole with copper spread on both sides, and the at least one power tube is welded on the front side of the through hole and dissipates heat via the copper spread on the back side of the through hole.

7. The multi-channel ultrasonic driving circuit according to claim 1, wherein at least one of the plurality of driving unit slots is a golden finger slot, a plurality of input interfaces and a plurality of output interfaces are integrated in the golden finger slot, the plug of the at least one driving unit circuit board is a golden finger plug, a plurality of corresponding input interfaces and a plurality of corresponding output interfaces are integrated on the golden finger plug, and/or

The drive output slot is a golden finger slot, the golden finger slot comprises a plurality of output interfaces, a plurality of paths of plugs of the ultrasonic energy conversion sheet are integrated into at least one golden finger plug, and a plurality of corresponding output interfaces are integrated on the at least one golden finger plug.

8. The multi-channel ultrasonic driving circuit as claimed in claim 7, wherein the plurality of output interfaces integrated on the at least one golden finger plug are respectively connected to the corresponding ultrasonic transducer chips via a plurality of radio frequency lines.

9. The multi-channel ultrasound driver circuit of claim 1, further comprising:

the heat dissipation device comprises at least one heat dissipation fan, wherein the plurality of driving unit slots are parallel to each other, the at least one driving unit circuit board is vertically inserted into the motherboard through the plurality of driving unit slots, and the at least one heat dissipation fan drives cold air to blow from one side of the at least one driving unit circuit board to the other side of the at least one driving unit circuit board.

10. A phase-controlled focused multi-channel ultrasonic treatment apparatus, comprising:

a phase-controlled focused ultrasound drive circuit as claimed in any one of claims 1 to 9;

the ultrasonic therapeutic apparatus comprises a plurality of ultrasonic energy conversion sheets, wherein the plugs of the ultrasonic energy conversion sheets are plugged into the driving output slots of the phase-control focusing ultrasonic driving circuit, and the ultrasonic energy conversion sheets operate according to driving signals of a plurality of phases output by the driving output slots in parallel so as to generate focused ultrasonic waves at the focus of the ultrasonic therapeutic apparatus.

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a phase-control focusing multi-channel ultrasonic driving circuit and a phase-control focusing multi-channel ultrasonic therapeutic apparatus.

Background

The focused ultrasound technique is a technique of focusing ultrasonic waves of multiple channels to generate high-intensity ultrasonic waves at a focal point thereof. In the prior art, a high-power ultrasonic transducer is generally adopted to emit a single-channel ultrasonic wave with higher intensity so as to simplify the device structure of a focused ultrasonic device. In order to meet the requirement of high-power driving, the ultrasonic transducer generally needs to be driven by an independent driving circuit formed by modules such as voltage regulation, signal generation, power amplification, resonance and the like.

For phased array focused ultrasound transducers, it is common to use hundreds of ultrasound transducer elements distributed on the spherical crown surface for electronic focusing, and each drive signal requires an independent phase. For high-intensity focused ultrasound, because each path of driving signal needs to be configured with an independent driving circuit to provide sufficient driving power for the ultrasonic energy conversion sheet, in the prior art, each path of ultrasonic energy conversion sheet needs to be configured with an independent driving plate, and each driving plate is connected by adopting an external connecting wire, so that the driving plates are mutually matched to achieve the effect of phase control focusing. The driving circuit realized by a large number of discrete elements is large in size and not beneficial to miniaturization of the phased array focused ultrasonic transducer, and the driving circuit has adverse effects on the stability and consistency of the driving circuit due to the fact that mutual interference is generated among driving plates.

In order to overcome the above defects in the prior art, a multi-channel ultrasonic driving technique with phase-controlled focusing is needed in the art, which is used for realizing miniaturization of a phase-controlled focusing ultrasonic driving circuit and improving the stability and consistency of the phase-controlled focusing ultrasonic driving circuit.

Disclosure of Invention

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

In order to overcome the defects in the prior art, the invention provides a phase-control focusing ultrasonic driving circuit and a phase-control focusing multi-channel ultrasonic therapeutic apparatus, which can realize the miniaturization of the phase-control focusing ultrasonic driving circuit and improve the stability and consistency of the phase-control focusing ultrasonic driving circuit.

Specifically, the phase-control focusing multi-channel ultrasonic driving circuit provided by the first aspect of the invention comprises at least one driving unit circuit board and a motherboard. Each driving unit circuit board comprises a multi-channel parallel driving circuit. And each channel of the driving circuit is used for driving at least one path of ultrasonic energy conversion sheet. The motherboard includes: the driving unit slots are used for plugging the at least one driving unit circuit board; the signal generating module is connected with the first input interface of each drive unit slot through an input signal bus printed on the motherboard; the driving output slots are connected with the first output interfaces of the driving unit slots through output signal buses printed on the motherboard and are used for being plugged with a plurality of paths of plugs of the ultrasonic energy conversion sheets; and the main controller is connected with the second input interface of each driving unit slot and the signal generation module, is connected with the upper computer in a communication way, and is configured to: and controlling the signal generation module to generate multi-channel phase signals according to an upper computer instruction provided by the upper computer, controlling at least one corresponding driving unit circuit board to generate a plurality of output signals corresponding to the phases through at least one driving unit slot, and outputting driving signals corresponding to the phases to all the ultrasonic energy conversion sheets in parallel through the driving output slot.

Further, in some embodiments of the present invention, the driving circuit includes a voltage regulating circuit and a power amplifying circuit per channel. The input end of the voltage regulating circuit is connected with the second input interface corresponding to the drive unit slot through the plug of the drive unit circuit board, and outputs the direct-current voltage with the corresponding amplitude according to the control signal provided by the main controller. The control end of the power amplification circuit is connected with the first input interface of the corresponding driving unit slot through the plug of the driving unit circuit board, and generates an output signal of a corresponding phase according to the phase signal of the corresponding channel generated by the signal generation module.

Further, in some embodiments of the present invention, each of the drive unit circuit boards further comprises a sub-controller. The sub-controllers are respectively connected with the input ends of the voltage regulating circuits of the driving circuits of the channels and are connected with second input interfaces of the corresponding driving unit slots through the plugs of the driving unit circuit boards. And the main controller respectively sends control signals to corresponding sub-controllers through the second input interfaces of the driving unit slots, and the sub-controllers respectively control the voltage regulating circuits of the corresponding multi-channel driving circuits to output direct-current voltages with corresponding amplitudes according to the control signals.

Further, in some embodiments of the present invention, the driving circuit further comprises a power detection circuit per channel. And the input end of the power detection circuit is connected with the output end of the power amplification circuit of the corresponding channel. The output end of the power detection circuit is connected with the first output interface of the corresponding driving unit slot through the plug of the driving unit circuit board. The sub-controllers are respectively connected with the output ends of the power detection circuits of the driving circuits of the channels and are connected with second output interfaces of the corresponding driving unit slots through plugs of the driving unit circuit boards. And the main controller acquires a plurality of output signals generated by the driving circuit of each channel through a second output interface of each driving unit slot and uploads each output signal to the upper computer.

Further, in some embodiments of the present invention, the power amplifying circuit includes an integrated half-bridge circuit and a half-bridge driving circuit.

Further, in some embodiments of the present invention, the power amplifying circuit includes at least one power transistor therein. And the welding point of the at least one power tube on the driving unit circuit board is a through hole with copper laid on two sides. The at least one power tube is welded on the front surface of the through hole and dissipates heat through the copper spreading on the back surface of the through hole.

Further, in some embodiments of the present invention, at least one of the plurality of driving unit slots is a gold finger slot. A plurality of input interfaces and a plurality of output interfaces are integrated in the golden finger slot. The plug of the at least one driving unit circuit board is a golden finger plug. And a plurality of corresponding input interfaces and a plurality of corresponding output interfaces are integrated on the golden finger plug. In this or other embodiments, the drive output socket is a gold finger socket. The golden finger slot comprises a plurality of output interfaces. And the plugs of the multiple ultrasonic transduction pieces are integrated into at least one gold finger plug. And a plurality of corresponding output interfaces are integrated on the at least one golden finger plug.

Further, in some embodiments of the present invention, the plurality of output interfaces integrated on the at least one golden finger plug are respectively connected to the corresponding ultrasonic transducers via a plurality of radio frequency lines.

Further, in some embodiments of the present invention, the phased focused ultrasound driver circuit further comprises at least one heat sink fan. The plurality of drive unit slots are parallel to each other. The at least one drive unit circuit board is vertically plugged into the motherboard through the plurality of drive unit slots. The at least one cooling fan drives cold air to blow from one side of the at least one driving unit circuit board to the other side of the at least one driving unit circuit board.

The invention provides in a second aspect the above phased focused multi-channel ultrasonic treatment apparatus, comprising: the invention provides the phase control focusing ultrasonic drive circuit and the multi-path ultrasonic transducer plate. And the plug of the multi-path ultrasonic energy conversion sheet is inserted into the driving output slot of the phase control focusing ultrasonic driving circuit. The multi-channel ultrasonic energy conversion sheet operates according to the driving signals of the multiple phases output by the driving output slot in parallel so as to generate focused high-intensity ultrasonic waves at the focus of the multi-channel ultrasonic therapeutic apparatus.

Drawings

The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.

Figure 1 illustrates a schematic diagram of a phase-controlled focused multi-channel ultrasonic treatment apparatus provided according to some embodiments of the present invention.

Figure 2 illustrates an assembly schematic of a phased focused ultrasound drive circuit provided in accordance with some embodiments of the present invention.

Fig. 3 illustrates a schematic diagram of a drive unit circuit board provided in accordance with some embodiments of the present invention.

Figure 4 illustrates a schematic diagram of a phased focused ultrasound drive circuit provided in accordance with some embodiments of the present invention.

Fig. 5 illustrates a schematic diagram of an amplification circuit provided in accordance with some embodiments of the present invention.

FIG. 6 illustrates a schematic diagram of a motherboard provided in accordance with some embodiments of the invention.

Fig. 7 illustrates a schematic diagram of a heat dissipation fan provided in accordance with some embodiments of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in connection with the preferred embodiments, there is no intent to limit its features to those embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Additionally, the terms "upper," "lower," "left," "right," "top," "bottom," "horizontal," "vertical" and the like as used in the following description are to be understood as referring to the segment and the associated drawings in the illustrated orientation. The relative terms are used for convenience of description only and do not imply that the described apparatus should be constructed or operated in a particular orientation and therefore should not be construed as limiting the invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, regions, layers and/or sections, these elements, regions, layers and/or sections should not be limited by these terms, but rather are used to distinguish one element, region, layer and/or section from another element, region, layer and/or section. Thus, a first component, region, layer or section discussed below could be termed a second component, region, layer or section without departing from some embodiments of the present invention.

As described above, the conventional driving circuit of the phased array focused ultrasound transducer is implemented by a large number of discrete elements, which, on one hand, is too large to facilitate miniaturization of the phased array focused ultrasound transducer, and on the other hand, may generate mutual interference between the driving boards, which may adversely affect the stability and consistency of the driving circuit.

In order to overcome the defects in the prior art, the invention provides a phase-control focusing ultrasonic driving circuit and a phase-control focusing multi-channel ultrasonic therapeutic apparatus, which can realize the miniaturization of the phase-control focusing ultrasonic driving circuit and improve the stability and consistency of the phase-control focusing ultrasonic driving circuit.

Referring to fig. 1, fig. 1 illustrates a schematic diagram of a phased focused multi-channel ultrasonic treatment apparatus according to some embodiments of the present invention.

In some embodiments of the present invention, as shown in fig. 1, the phase-controlled focusing multi-channel ultrasonic therapeutic apparatus provided by the second aspect of the present invention comprises the multi-channel ultrasonic driving circuit 10 provided by the first aspect of the present invention, and the multi-channel ultrasonic transducer 20. The multi-channel ultrasonic driving circuit 10 can be fixedly installed in a driving case of a multi-channel ultrasonic therapeutic apparatus via a bolt, a bayonet and other structures, is connected with the multi-channel ultrasonic transducer 20 via a plurality of radio frequency lines, and is connected with an external upper computer 30 such as a desktop computer, a notebook computer, a tablet computer, a workstation and a server in a wired and/or wireless manner. The multi-channel ultrasonic transducer 20 may comprise more than one hundred ultrasonic transducer 20, which are disposed on the same spherical crown surface of the therapy head of the above phased focusing multi-channel ultrasonic therapy apparatus, and can operate according to the driving signals of multiple phases output by the multi-channel ultrasonic driving circuit 10 in parallel, so as to generate focused high-intensity ultrasonic waves at the focus of the therapy head.

Please further refer to fig. 2 to fig. 6. Figure 2 illustrates an assembly schematic of a phased focused ultrasound drive circuit provided in accordance with some embodiments of the present invention. Fig. 3 illustrates a schematic diagram of a drive unit circuit board provided in accordance with some embodiments of the present invention. Figure 4 illustrates a schematic diagram of a phased focused ultrasound drive circuit provided in accordance with some embodiments of the present invention. Fig. 5 illustrates a schematic diagram of an amplification circuit provided in accordance with some embodiments of the present invention. FIG. 6 illustrates a schematic diagram of a motherboard provided in accordance with some embodiments of the invention.

In some embodiments of the present invention, as shown in fig. 2, the above-mentioned phased focused ultrasound driving circuit provided by the first aspect of the present invention includes a motherboard 11, and at least one driving unit circuit board 12. The motherboard 11 can be fixedly mounted in the driving chassis of the above-mentioned phase-controlled focusing multi-channel ultrasonic therapeutic apparatus provided by the second aspect of the present invention via bolts, fasteners, etc., and a plurality of driving unit slots 111 are configured thereon for mating with the plugs of at least one driving unit circuit board 12 to complete the hard connection between the motherboard 11 and the driving unit circuit board 12.

As shown in fig. 3 and 4, a multi-channel parallel driving circuit 121 may be mounted on each driving unit circuit board 12, wherein each channel driving circuit 121 is used for driving at least one ultrasonic transducer 20. The driver circuits 121 mounted on the same driver Circuit Board 12 are connected to the plug 122 of the driver Circuit Board 12 through Printed Circuit Board (PCB) wiring Printed on the driver Circuit Board 12, respectively, so as to realize parallel connection of the driver circuits 121. In some embodiments, a driver unit circuit board 12 of an on-board 8-channel parallel driver circuit 121 may drive the 8-way ultrasound transducer 20. In other embodiments, a driver circuit board 12 carrying a 16-channel parallel driver circuit 121 may drive 16 ultrasonic transducers 20. A user, a medical staff or a technician can insert at least one driving unit circuit board 12 into the motherboard 11 or enable at least one inserted driving unit circuit board 12 according to the intensity of the ultrasonic wave required for the treatment, so as to drive a corresponding number of ultrasonic transducer blades 20 to perform ultrasonic phase-controlled focusing.

In the embodiment shown in fig. 4, one voltage regulating circuit and one power amplifying circuit may be included in each channel driving circuit 121. The input terminal of the voltage regulating circuit is connected to the power terminal of the power amplifying circuit via the second input interface of the PCB wiring connection plug 122 printed on the driving unit circuit board 12, and the output terminal thereof is connected to the power terminal of the power amplifying circuit via the PCB wiring printed on the driving unit circuit board 12, so that the stable dc voltage V with the corresponding amplitude can be output according to the control signal obtained from the second input interface_c. The control terminal of the power amplification circuit is capable of being based on the phase signal S obtained from the first input interface via the first input interface of the PCB wiring connection plug 122 printed on the drive unit circuit board 12_nOutput the voltage regulating circuitConverts the dc voltage into an output signal with a corresponding frequency and phase, and drives the corresponding ultrasonic transducer 20 to operate to emit ultrasonic waves with a specified intensity, frequency, duty cycle and phase.

Further, in the embodiment shown in fig. 5, the power amplifying circuit may include an integrated half-bridge circuit and a half-bridge driving circuit. Specifically, in some embodiments, the integrated half-bridge circuit and half-bridge driver circuit may be implemented as a completely separate integrated chip (CSD97370Q5M) that includes the power supply and the half-bridge circuit. In other embodiments, the integrated half-bridge circuit and the half-bridge driving circuit may also be formed by an integrated half-bridge driving chip (e.g., TPS28225) and combining the upper and lower power MOSFETs Q1 and Q2. By adopting the integrated half-bridge circuit and half-bridge driving circuit, the scheme can be matched with the PCB wiring on the driving unit circuit board 12, and further realizes the miniaturization and the compactness of each channel driving circuit 121, thereby further realizing the miniaturization of the multi-channel ultrasonic driving circuit 10 and promoting the stability and the consistency of the multi-channel ultrasonic driving circuit 10.

Further, in the embodiment shown in fig. 5, the back end of the half-bridge circuit may be further configured with an LC resonant circuit. Specifically, when the impedance of the ultrasonic transducer piece 20 is low (e.g., lower than 1 ohm), the power amplification circuit may directly drive the ultrasonic transducer piece 20 through the half-bridge circuit to emit high-intensity ultrasound. Conversely, when the impedance of the ultrasonic transducer 20 is relatively high (e.g., 1 to 50 ohms), the power amplifier circuit may input the output signal of the half-bridge circuit into the LC resonant circuit for resonance, and then drive the corresponding ultrasonic transducer 20 by using the output signal of the LC resonant circuit. Thus, the scheme can adapt to the ultrasonic energy conversion sheets 20 with different models and different parameters so as to achieve the control target of the phase control focusing ultrasonic drive.

In the embodiments shown in fig. 3 and 4, the per-channel driving circuit 121 may further include a power detection circuit. The power detection circuit may be a power detection integrated chip, the input terminal of which is connected to the output terminal of the power amplification circuit via the PCB wiring printed on the driving unit circuit board 12, and the output terminal of which is connected to the first output interface and the second output interface of the plug 122 via the PCB wiring printed on the driving unit circuit board 12. The power detection circuit drives the corresponding ultrasonic transducer 20 to operate through the first output interface, monitors the channel working state according to the forward transmission electric power and the reflected electric power output by the power detection circuit, and feeds back the forward transmission electric power and the reflected electric power to the main controller of the phase-control focusing ultrasonic drive circuit and the upper computer 30 through the second output interface.

Preferably, in some embodiments of the present invention, each driving unit circuit board 12 may further be configured with a sub-controller (not shown). The sub-controller may be a Micro Controller Unit (MCU). The sub-controller is connected to the input terminal of the voltage-regulating circuit of each channel driving circuit 121 via the control bus printed on the driving unit circuit board 12, and connected to the second input interface of the plug 122 via the control bus printed on the driving unit circuit board 12, and can obtain the control signal provided by the main controller from the second input interface of the plug 122, and control the voltage-regulating circuit of each channel driving circuit 121 according to the control signal, so that it outputs the stable dc voltage V with corresponding amplitude_c。

In some embodiments, the sub-controller is further connected to the output end of the power detection circuit of each channel driving circuit 121 via a control bus printed on the driving unit circuit board 12, and is connected to the second output interface of the plug 122 via the control bus printed on the driving unit circuit board 12, so as to obtain the output signal generated by each channel driving circuit 121 from the output end of each power detection circuit, and transmit the output signal to the main controller via the second output interface of the plug 122, and further upload the output signal to the upper computer 30 via the main controller.

For the multi-channel ultrasonic therapeutic apparatus of phase control focusing related to the independent driving requirements of hundreds of ultrasonic transducer array elements, the sub-controller is configured on each driving unit circuit board 12, and the sub-controller is used for sub-managing the driving function and the monitoring function of each driving circuit 121 on the driving unit circuit board 12, the scheme can remarkably reduce the data processing requirement on the main controller, on one hand, the overall device cost of the multi-channel ultrasonic driving circuit 10 is reduced, on the other hand, the control frequency of the controller on each driving circuit 121 can be remarkably improved, and therefore the control frequency requirement of the multi-channel ultrasonic driving circuit 10 in a radio frequency band is met.

As shown in fig. 2 and 6, in some embodiments of the invention, the motherboard 11 may be provided with a plurality of driving unit slots 111, a signal generating module 112, a driving output slot 113, and a main controller (not shown), wherein each driving unit slot 111 is plugged with a driving unit circuit board 12.

The driving unit slot 111 may be a gold finger slot, in which a first input interface, a second input interface, a first output interface and a second output interface are integrated, and the first input interface, the second input interface, the first output interface and the second output interface of the gold finger plug 122 of the driving unit circuit board 12 can be matched to achieve the effect of plugging the driving unit circuit board 12. In some embodiments, the edge of the slot 111 may be further provided with a limit catch. The limit catch automatically locks in response to the user's act of inserting the gold finger plug 122 into the slot 111. When the drive unit circuit board 12 needs to be taken out, the user can press the limit buckle to eject the gold finger plug 122 of the drive unit circuit board 12 out of the slot 111.

The signal generating module 112 is connected to the first input interface of each driving unit socket 111 via a PCB input signal bus printed on the motherboard 11. In some embodiments, the signal generating module 112 may include a direct digital frequency synthesis (DDS) chip, which generates one or more frequency-adjustable and phase-adjustable square-wave signals. In other embodiments, the signal generating module 112 may include a frequency synthesizing/clock generating chip, and the frequency synthesizing/clock generating chip generates one or more frequency-adjustable and phase-adjustable square wave signals.

The driving output slot 113 includes a plurality of output interfaces, and is connected to the first output interface of each driving unit slot 111 via a PCB output signal bus printed on the motherboard 11. In some embodiments, the driver output socket 113 may also be a gold finger socket. When the phased focusing ultrasonic driving of the multi-path ultrasonic transduction piece 20 needs to be performed, a user, a medical staff or a technician may insert a gold finger integrated plug of the multi-path ultrasonic transduction piece 20 into the driving output slot 113, and obtain a driving signal of a plurality of phases from the driving output slot 113 by the phased focusing ultrasonic driving circuit 10 in parallel, so as to drive the multi-path ultrasonic transduction piece 20 to generate a focused ultrasonic wave at the focus of the treatment head.

In some embodiments, the main controller is connected to the signal generating module 112 via a PCB control signal bus printed on the motherboard 11, and is respectively connected to the second input interfaces of the driving unit sockets 111. In addition, the main controller is also connected with the upper computer 30 through communication interfaces such as USB/RS 485.

When the phased focusing ultrasonic driving of the multiple ultrasonic transducer pieces 20 is performed, the upper computer 30 may first determine the number of the required ultrasonic transducer pieces 20 according to the treatment requirements of the multi-channel ultrasonic treatment apparatus, and formulate an upper computer instruction indicating the intensity, frequency and phase of the ultrasonic waves required to be emitted by each ultrasonic transducer piece 20, so as to control the timing and working frequency of the ultrasonic transducer pieces 20 to start working and stop working. Then, the upper computer 30 can transmit the upper computer command to the main controller of the phase-controlled focused ultrasound driving circuit 10 via the USB/RS485 interface, and the main controller performs D/a conversion on the obtained upper computer command, and determines the input voltage of each voltage regulating circuit and the control signal of the signal generating module 112 according to the obtained upper computer command.

Then, the main controller will transmit the generated control signal to the signal generating module 112 via the PCB control signal bus printed on the motherboard 11 to control the signal generating module 112 to generate a multi-channel phase signal with corresponding frequency, duty ratio and pulse length for each ultrasonic transducer 20. In the multi-channel ultrasonic therapeutic apparatus with phased focusing, each ultrasonic transduction piece 20 needs an independent phase signal to realize electronic focusing, and the signal generation module 112 can adopt a Field Programmable Gate Array (FPGA) to output phase signals of different phases required by each ultrasonic transduction piece 20 in parallel, so as to independently control the phase of each ultrasonic transduction piece 20. The phase signal is typically a square wave signal having an amplitude of 3.3V or 5V.

Then, the main controller transmits the obtained host computer command to the second input interface of the corresponding at least one driving unit slot 111 via the PCB control signal bus printed on the motherboard 11. The signal generating module 112 transmits the generated multi-channel phase signals to the first input interface of the corresponding at least one driving unit slot 111 via a PCB input signal bus printed on the motherboard 11, respectively.

The sub-controller of the driving unit circuit board 12 plugged in the driving unit slot 111 will obtain the above-mentioned upper computer instruction provided by the main controller from the second input interface corresponding to the driving unit slot 111 via the control bus printed on the driving unit circuit board 12, and control the voltage regulating circuit of each channel driving circuit 121 to output the stable dc voltage V with corresponding amplitude according to the upper computer instruction_c。

Each of the amplifying circuits of the driving unit circuit board 12 plugged in the driving unit slot 111 generates a phase signal from the first input interface acquisition signal generation module 112 corresponding to the driving unit slot 111 via the PCB wiring printed on the driving unit circuit board 12, and generates an output signal corresponding to the phase according to the phase signal.

The power detection circuit at the rear end of each amplification circuit obtains the output signal generated by the corresponding amplification circuit from the output end of the corresponding amplification circuit through the PCB wiring printed on the driving unit circuit board 12, on one hand, the output signal of the corresponding phase is provided to the first output interface of the plug 122 through the PCB wiring printed on the driving unit circuit board 12, on the other hand, the output signal is fed back to the sub-controller through the PCB wiring printed on the driving unit circuit board 12, and then the sub-controller provides the corresponding detection signal to the second output interface of the plug 122.

Each output interface of the drive output socket 113 acquires a plurality of output signals generated by each channel drive circuit 121 from the first output interface of each drive unit socket 111 via a PCB output signal bus printed on the motherboard 11. Then, in response to the enable signal provided by the main controller, the driving output slot 113 outputs driving signals of corresponding phases in parallel to the plurality of radio frequency lines connected to the corresponding ultrasonic transducer plates 20 via the plugged gold finger plugs, respectively, so as to control the corresponding ultrasonic transducer plates 20 to generate focused ultrasonic waves at the focus of the therapy head of the multi-channel ultrasonic therapy apparatus based on the principle of electronic focusing. By outputting the driving signals of the corresponding phases in parallel to the plurality of radio frequency lines connected to the ultrasound transducers 20 in the therapy head on the motherboard 11 via the driving output slot 113, the scheme can further shorten the length of the driving signal output line, which is beneficial to increase the electro-acoustic conversion efficiency of the driving circuit 10 during operation.

Further, in some preferred embodiments, the main controller further obtains the detection signals provided by each sub-controller from the second output interfaces of the driving unit circuit boards 12 inserted through the second output interfaces of the driving unit slots 111, and uploads the detection signals to the upper computer 30 through the USB/RS485 interface, so that a technician can observe and adjust the transmission parameters and the working state of the driving circuit 10 by using the upper computer 30, or the upper computer 30 automatically performs precise and stable negative feedback control on each channel driving circuit 121.

Based on the above description, the present invention integrates the driving circuit 121 of the multiple ultrasonic transducers 20 on one driving unit circuit board 12, and adopts an integrated MOS driving or half-bridge circuit chip, thereby greatly reducing the volume of the single-channel ultrasonic driving circuit 121, reducing the device cost of the phase-control focusing ultrasonic driving circuit 10, and simplifying the structure of the phase-control focusing ultrasonic driving circuit. Furthermore, a plurality of slots 111 are designed to be connected with a plurality of driving unit circuit boards 12 in a hard mode, and PCB wiring printed on a motherboard 11 is used for connecting the main controller, the signal generator and each driving unit circuit board 12. In addition, by designing more slots 111 and inserting or enabling a relatively smaller number of driving unit circuit boards 12 according to actual use requirements, the present invention has the advantage of easy expansion, and can further insert or enable more driving unit circuit boards 12 according to actual use requirements to focus and generate ultrasonic waves with higher intensity.

Further, on the basis of realizing the miniaturization and compactness design, the phase-control focusing ultrasonic driving circuit 10 and the phase-control focusing multi-channel ultrasonic therapeutic apparatus provided by the invention can be further configured with one or more additional heat dissipation designs so as to avoid the damage of the power chip caused by continuous heating in the working process due to the miniaturization and compactness structure.

Specifically, as shown in fig. 4 and 5, the power amplification circuit of each channel driving circuit 121 includes at least one power MOS chip. These power MOS chips, as well as the inductor and capacitor elements in the LC resonant circuit, generate heat during operation. In some embodiments, the power MOS chip, the inductor coil and the capacitor element of each channel driving circuit 121 may be uniformly distributed at each position of the driving unit circuit board 12, so that the whole circuit board 12 generates heat uniformly at different positions during operation. Further, the bonding pads of these power MOS chips on the driving unit circuit board 12 may preferably be through holes with copper laid on both sides. The power MOS chip patch is fixedly connected with the front surface of the corresponding through hole through soldering tin, so that the front surface and the back surface of the through hole are simultaneously cooled through copper paving on the front surface and the back surface.

Referring further to fig. 7, fig. 7 is a schematic diagram illustrating a heat dissipation fan according to some embodiments of the invention.

As shown in fig. 2 and 7, the case side wall of the phased focusing ultrasonic driving circuit 10 is further provided with at least one cooling fan, and the plurality of driving unit slots 111 on the motherboard 11 are parallel to each other. When the phase control focusing ultrasonic driving of the multi-path ultrasonic transducer 20 is performed, the driving unit circuit boards 12 are vertically plugged into the motherboard 12 through the plurality of driving unit slots 111 which are parallel to each other, so as to form a smooth air duct. The first cooling fan arranged on one side wall of the case blows cold air into the case, and the second cooling fan arranged on the other opposite side wall of the case draws hot air out of the case, so that cold air is driven to blow from one side of the at least one driving unit circuit board 12 to the other side of the at least one driving unit circuit board 12, and heat on the front side and the back side of each driving unit circuit board 12 is taken away efficiently.

Further, the positions of the power MOS chips, the inductance coils, and the capacitance elements of the driving unit circuit boards 12 may be further provided with temperature sensors. The temperature sensors are connected with the sub-controllers through a PCB control bus printed on the driving unit circuit boards 12, connected with the master controller through second output interfaces of the plugs 122 of the driving unit circuit boards 12, acquired and converted through an analog-to-digital converter (ADC) in the master controller, and then uploaded to the upper computer 30, so that the upper computer 30 can adjust the emission parameters and the working state of the driving circuit 10 according to the acquired temperature information, adjust the rotating speed of the fan according to the emission power, and guarantee the heat dissipation efficiency of the driving circuit 10.

While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.

Those of skill in the art would understand that information, signals, and data may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits (bits), symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

Although the main controller and the sub-controllers described in the above embodiments may be implemented by a combination of software and hardware. It is understood that the main controller and the sub-controllers may be implemented in software or hardware alone. For a hardware implementation, the main controller and the sub-controllers may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, other electronic devices adapted to perform the functions described above, or a selected combination thereof. For software implementations, the main controller and the sub-controllers may be implemented by separate software modules, such as program modules (processes) and function modules (functions), running on a common chip, each of which performs one or more of the functions and operations described herein.

The various illustrative logical modules, and circuits described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.