Multi-channel phase control focusing ultrasonic stimulator

Abstract

The utility model relates to a multi-channel phase-control focusing ultrasonic stimulator, which is characterized by comprising a main control board, a transducer and a transducer identification circuit, the number of the transducers is more than two, the main control board is electrically connected with the transducers, the transducer identification circuit is electrically connected with the transducers, and the transducer identification circuit is electrically connected with the main control board; the main control board comprises a main control circuit, a DDS circuit and an adjusting circuit unit. The main control circuit is electrically connected with the DDS circuit, the DDS circuit is electrically connected with the adjusting circuit unit, and the adjusting circuit unit is electrically connected with the transducer; the DDS circuits are electrically connected with the transducers in a one-to-one correspondence mode, and the adjusting circuit units are electrically connected with the transducers in a one-to-one correspondence mode. Each transducer comprises vibration elements, and a plurality of vibration elements are arranged in each transducer; and the vibration element is correspondingly and electrically connected with the adjusting circuit unit.

Description

Technical Field

[0001] This application relates to the field of neuromodulation technologies, and particularly to a multi-channel phased focused ultrasound stimulator. Background Art

[0002] Low-intensity transcranial focused ultrasound (LIFU) is a non-invasive neuromodulation technique aimed at regulating neural activity by delivering focused ultrasonic beams to small target areas in the brain. LIFU has better spatial resolution and can reach deep brain regions, making it potentially more attractive than existing non-invasive stimulation techniques. The application prospects of LIFU are broad, such as the treatment of neurological or psychiatric diseases like epilepsy, Parkinson's disease, and depression, opening the blood-brain barrier for drug delivery, and the study of brain functions. LIFU can be easily combined with neuroimaging modalities, such as functional magnetic resonance imaging (FMRI) and electroencephalogram (EEG), without interfering with the recordings because it uses sound waves rather than electric or magnetic fields.

[0003] Currently, in the application of neuromodulation to the human body on the market, mainly single-channel transducers are used. This technical solution cannot perform multi-target stimulation. To achieve multi-target intervention, multiple devices are required, which is costly and lacks flexibility. Although there is a dual-channel technology in the devices used for animals, it is not applicable to the treatment and intervention of humans, and its fixed-focus transducer cannot adjust the stimulation depth. Therefore, the comprehensive performance of existing single-channel low-intensity transcranial focused ultrasound devices needs to be improved. Summary of the Utility Model

[0004] In view of this, this application proposes a multi-channel phased focused ultrasound stimulator to solve the above problems.

[0005] According to one aspect of this application, a multi-channel phased focused ultrasound stimulator is provided, including a main control board, transducers, and a transducer identification circuit; the number of the transducers is more than two, the main control board is electrically connected to the transducers, the transducer identification circuit is electrically connected to the transducers, and the transducer identification circuit is electrically connected to the main control board;

[0006] The main control board includes: a main control circuit, a DDS circuit, and an adjustment circuit unit; the main control circuit is electrically connected to the DDS circuit, the DDS circuit is electrically connected to the adjustment circuit unit, and the adjustment circuit unit is electrically connected to the transducers;

[0007] The DDS circuit is electrically connected to the transducers in a one-to-one correspondence, and the adjustment circuit unit is electrically connected to the transducers in a one-to-one correspondence;

[0008] The transducer includes vibration elements, and the number of the vibration elements inside each transducer is multiple; the vibration elements are correspondingly and electrically connected to the adjustment circuit unit.

[0009] In a possible implementation manner, the adjustment circuit unit includes: a waveform adjustment and amplification circuit, a power amplification circuit, and an impedance matching circuit; the waveform adjustment and amplification circuit, the power amplification circuit, and the impedance matching circuit match the number of the vibration elements; the waveform adjustment and amplification circuit is electrically connected to the DDS circuit, the waveform adjustment and amplification circuit is electrically connected to the power amplification circuit, the power amplification circuit is electrically connected to the impedance matching circuit, and the impedance matching circuit is electrically connected to the vibration elements.

[0010] In a possible implementation manner, the adjustment circuit unit further includes: a filtering circuit; the number of the filtering circuits matches the number of the vibration elements, the filtering circuits are correspondingly and electrically connected to the waveform adjustment and amplification circuits one by one, the filtering circuits are correspondingly and electrically connected to the power amplification circuits one by one, the power amplification circuits are correspondingly and electrically connected to the impedance matching circuits one by one, and the impedance matching circuits are correspondingly and electrically connected to the vibration elements one by one.

[0011] In a possible implementation manner, the output end of the DDS circuit is electrically connected to the input end of the waveform adjustment and amplification circuit, the output end of the waveform adjustment and amplification circuit is electrically connected to the input end of the filtering circuit, the output end of the filtering circuit is electrically connected to the input end of the power amplification circuit, the output end of the power amplification circuit is electrically connected to the input end of the impedance matching circuit, and the output end of the impedance matching circuit is electrically connected to the input end of the vibration elements.

[0012] In a possible implementation manner, it further includes: a drive signal detection circuit; the output ends of the impedance matching circuits are correspondingly and electrically connected to the input ends of the drive signal detection circuit one by one, and the output end of the drive signal detection circuit is electrically connected to the main control circuit.

[0013] In a possible implementation manner, the impedance matching circuit includes: a first capacitor, a second capacitor, a first inductor, a second inductor, and a resistor; one end of the first capacitor is electrically connected to one end of the second capacitor through the first inductor, and the other end of the first capacitor is electrically connected to the other end of the second capacitor;

[0014] One end of the second capacitor is electrically connected to one end of the resistor through the second inductor, and the other end of the second capacitor is electrically connected to the other end of the resistor.

[0015] In a possible implementation, the output end of the transducer is electrically connected to the input end of the transducer identification circuit, and the output end of the transducer identification circuit is electrically connected to the input end of the main control circuit.

[0016] In a possible implementation, the number of the transducers is two, and the number of the vibration elements inside each of the two transducers is four.

[0017] In a possible implementation, the main control board further includes: a clock circuit and a communication circuit; the clock circuit is electrically connected to the main control circuit; the communication circuit is electrically connected to the main control circuit, wherein the communication circuit has RS232, RS485 and network interfaces.

[0018] In a possible implementation, it further includes: a display screen; the display screen is electrically connected to the main control circuit, and the type of the display screen is a touch display screen.

[0019] In a possible implementation, the main control circuit includes: an MCU unit and an FPGA unit;

[0020] The MCU unit is bidirectionally electrically connected to the FPGA unit, and the FPGA unit is bidirectionally electrically connected to the DDS circuit.

[0021] Advantages of the present application:

[0022] The multi-channel phased array focused ultrasound stimulator proposed in this embodiment, compared with the prior art, has more flexible and accurate frequency and phase modulation, and the generated focus is more accurate. It can be automatically identified after replacing the probe, which is convenient and intelligent. The multi-channel phased array focused ultrasound stimulator provided by the present application can enable a device to independently output two waveforms by setting two or more transducers. Then, the feedback signal is input from the transducer identification circuit to the main control circuit, so that the main control circuit can control the vibration elements in the transducer with appropriate impedance respectively. Therefore, the multi-channel phased array focused ultrasound stimulator of the present application has the function of low-intensity transcranial ultrasound stimulation. And when the phased array technology is adopted in the multi-channel phased array focused ultrasound stimulator of the present application, the focal length, the size of the focal spot and the intensity can be independently adjusted. It provides a variety of treatment parameter options for clinical treatment intervention. And the host can be used independently or in combination with a computer. Multiple channels are stimulated simultaneously for multi-target treatment regulation, with low-intensity stimulation and relatively high safety.

[0023] According to the following detailed description of the exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present application will become clear. Description of the Drawings

[0024] The accompanying drawings, which are included in and form a part of this specification, illustrate exemplary embodiments, features, and aspects of the present application, and are used to explain the principles of the present application together with the specification.

[0025] Figure 1 Schematic diagram of the principle of a multi-channel phased focused ultrasound stimulator showing an embodiment of the present application;

[0026] Figure 2 Circuit diagram of an impedance matching circuit showing an embodiment of the present application. Detailed Description of the Invention

[0027] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. Like reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0028] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0030] The term "exemplary" used herein means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" herein need not be construed as superior to or better than other embodiments.

[0031] In addition, for a better description of the present application, numerous specific details are given in the following detailed description. Those skilled in the art should understand that the present application can be implemented without some specific details. In some instances, methods, means, elements, and circuits well-known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0032] Such as Figure 1 and Figure 2As shown in the figure, the multi-channel phased array focused ultrasound stimulator includes a main control board 100, a transducer 200, and a transducer identification circuit 300. The number of transducers 200 is more than two. The main control board 100 is electrically connected to the transducer 200, the transducer identification circuit 300 is electrically connected to the transducer 200, and the transducer identification circuit 300 is electrically connected to the main control board 100. The main control board 100 includes: a main control circuit 110, a DDS circuit 120, and an adjustment circuit unit. The main control circuit 110 is electrically connected to the DDS circuit 120, the DDS circuit 120 is electrically connected to the adjustment circuit unit, and the adjustment circuit unit is electrically connected to the transducer 200. The DDS circuit 120 is electrically connected to the transducer 200 in a one-to-one correspondence, and the adjustment circuit unit is electrically connected to the transducer 200 in a one-to-one correspondence. The transducer 200 includes vibration elements 210, and the number of vibration elements 210 inside each transducer 200 is multiple. The vibration elements 210 are arranged at intervals inside the transducer 200. The vibration elements 210 are electrically connected to the adjustment circuit unit in a corresponding manner.

[0033] The multi-channel phased array focused ultrasound stimulator proposed in this embodiment has more flexible and accurate frequency and phase modulation and more accurate generated focal points compared with the prior art. It can be automatically recognized after replacing the probe, which is convenient and intelligent. The multi-channel phased array focused ultrasound stimulator provided in this application has the function of low-intensity transcranial ultrasound stimulation. By adopting multiple channels, one device can independently output two waveforms. Using the phased array technology, the focal length, focal spot size, and intensity can all be independently adjusted. It provides a variety of treatment parameter options for clinical treatment intervention. And the main machine can be used independently or in combination with a computer. Multiple channels are stimulated simultaneously for multi-target treatment regulation, with low-intensity stimulation and relatively high safety. Specifically, a driving signal is generated by the DDS circuit 120, and the focal distance control is more precise. By combining the phased technology with different transducers 200, the stimulation regulation of brain tissues at different depths of the cortex and subcutaneous can be realized. Secondly, a multi-channel design is set to achieve simultaneous stimulation of multiple targets. The main machine can perform stimulation settings alone or can be equipped with a PC to control the main machine for stimulation settings. Low-intensity stimulation ensures the safety of use while meeting the requirements of neuromodulation. It should also be noted that the DDS circuit 120 generates a smooth sine wave signal of 200 kHz to 1300 kHz; eight channels have the same frequency, supporting the setting of the above sine wave signals with any phase difference, and precisely controlling the focal position; each channel is designed with a corresponding radio frequency amplification unit, supporting linear adjustment of the sine wave amplitude; supporting the setting of the stimulation period, supporting the setting of the duration of each period, the duration of the sine wave signal, and the intermittent time; each channel is designed with high-pass and low-pass filters, and the upper and lower cut-off frequencies of the filters can be automatically adjusted according to the type of the transducer 200 probe. The probe model can be automatically recognized. Further, it should be noted that the DDS circuit 120 is a direct digital synthesis technology.

[0034] Here, it should be noted that the number of channels in the multi-channel phased focused ultrasound stimulator of the present application refers to the number of probes, and CH1-CH8 in the text are the vibration element channels.

[0035] In one specific embodiment, the adjustment circuit unit includes: a waveform adjustment and amplification circuit 131, a power amplification circuit 132, and an impedance matching circuit 133; the number of the waveform adjustment and amplification circuits 131, the number of the power amplification circuits 132, and the number of the impedance matching circuits 133 are all matched with the number of the vibration elements. The waveform adjustment and amplification circuit 131 is electrically connected to the DDS circuit 120, the waveform adjustment and amplification circuit 131 is electrically connected to the power amplification circuit 132, the power amplification circuit 132 is electrically connected to the impedance matching circuit 133, and the impedance matching circuit 133 is electrically connected to the vibration element 210.

[0036] In one specific embodiment, the adjustment circuit unit further includes: a filtering circuit 134; the number of the filtering circuits 134 is matched with the number of the vibration elements; the filtering circuits 134 are electrically connected to the waveform adjustment and amplification circuits 131 in a one-to-one correspondence, the filtering circuits 134 are electrically connected to the power amplification circuits 132 in a one-to-one correspondence, the power amplification circuits 132 are electrically connected to the impedance matching circuits 133 in a one-to-one correspondence, and the impedance matching circuits 133 are electrically connected to the vibration elements 210 in a one-to-one correspondence. In this embodiment, it should be noted that each channel has one waveform adjustment and amplification circuit 131, and the waveform adjustment and amplification circuit 131 is mainly composed of a variable gain amplifier, an operational amplifier, and peripheral circuits. The waveform adjustment and amplification circuit 131 mainly converts the differential sine wave signal output by the DDS into a single-ended mode and performs programmed linear amplification. It should also be noted that the power amplification circuit 132 is mainly composed of a drive amplifier, a digital potentiometer, and other peripheral components. The digital potentiometer programmatically and precisely adjusts the output power of the power amplification circuit 132.

[0037] In one specific embodiment, the output end of the DDS circuit 120 is electrically connected to the input end of the waveform adjustment and amplification circuit 131, the output end of the waveform adjustment and amplification circuit 131 is electrically connected to the input end of the filtering circuit 134, the output end of the filtering circuit 134 is electrically connected to the input end of the power amplification circuit 132, the output end of the power amplification circuit 132 is electrically connected to the input end of the impedance matching circuit 133, and the output end of the impedance matching circuit 133 is electrically connected to the input end of the vibration element 210. In this embodiment, it should be noted that the main function of the DDS circuit 120: under the control of the main control unit, generate the sine wave signal required to drive the transducer 200.

[0038] In one specific embodiment, it further includes: a drive signal detection circuit 400; the output terminals of the impedance matching circuit 133 and the input terminals of the drive signal detection circuit 300 are electrically connected in one-to-one correspondence, and the output terminal of the drive signal detection circuit 300 is electrically connected to the main control circuit 110.

[0039] In one specific embodiment, the impedance matching circuit 133 includes: a first capacitor, a second capacitor, a first inductor, a second inductor, and a resistor; one end of the first capacitor CI is electrically connected to one end of the second capacitor C2 through the first inductor L1, and the other end of the first capacitor CI is electrically connected to the other end of the second capacitor C2; one end of the second capacitor C2 is electrically connected to one end of the resistor R1 through the second inductor L2, and the other end of the second capacitor C2 is electrically connected to the other end of the resistor R1. In this embodiment, it should be noted that the impedance matching circuit 133 is as follows Figure 2 As shown, the first capacitor CI, the second capacitor C2, the first inductor L1, and the second inductor L2 in the impedance matching circuit 133 are designed to be adjustable to flexibly adapt to different transducers 200.

[0040] In one specific embodiment, the output terminal of the transducer 200 is electrically connected to the input terminal of the transducer identification circuit 300, and the output terminal of the transducer identification circuit 300 is electrically connected to the input terminal of the main control circuit 110.

[0041] In one specific embodiment, the number of transducers 200 is two, and the number of vibration elements 210 inside each of the two transducers 200 is four. In this embodiment, it should be noted that the number of waveform adjustment and amplification circuits 131, power amplification circuits 132, impedance matching circuits 133, and filtering circuits 134 is eight. It should also be noted that the transducer 200 is provided with four vibration elements 210, which can be applicable to a relatively large variety of transducer 200 probes, and the range of the depth of action that can be phase-controlled in four channels is wider, better meeting medical needs. Specifically, the hardware system adopted in this application consists of a host and two transducers 200, and this hardware system supports interaction with a PC. The types of transducer 200 probes supported are: (1) 200 - 140 kHz, depth of action 20 - 60 mm, using two-channel phase control; (2) 150 - 300 kHz, depth of action 32 - 72 mm, using four-channel phase control; (3) 900 - 1140 kHz, depth of action 32 - 72 mm, using four-channel phase control; (4) 2000 - 1300 kHz, depth of action 9.5 - 16.5 mm, using four-channel phase control. It should also be noted that for the two transducers of this application, four vibration elements 210 in one of the transducers 200, and the CH1 vibration element channel, CH2 vibration element channel, CH3 vibration element channel, and CH4 vibration element channel are correspondingly electrically connected to the transducer identification circuit; there are CH1 vibration element channel, CH2 vibration element channel, CH3 vibration element channel, and CH4 vibration element channel between this transducer 200 and the correspondingly arranged drive signal detection circuit 400, and there are CH1 vibration element channel, CH2 vibration element channel, CH3 vibration element channel, and CH4 vibration element channel between this transducer 200 and the correspondingly arranged DDS circuit 120. The four vibration elements 210 in the other transducer 200 respectively transmit the CH5 vibration element channel, CH6 vibration element channel, CH7 vibration element channel, and CH8 vibration element channel, and there are CH5 vibration element channel, CH6 vibration element channel, CH7 vibration element channel, and CH8 vibration element channel between this transducer 200 and the transducer identification circuit 300, there are CH5 vibration element channel, CH6 vibration element channel, CH7 vibration element channel, and CH8 vibration element channel between this transducer 200 and the correspondingly arranged drive signal detection circuit 400, and there are CH5 vibration element channel, CH6 vibration element channel, CH7 vibration element channel, and CH8 vibration element channel between this transducer 200 and the correspondingly arranged DDS circuit 120.

[0042] In one specific embodiment, the main control board 100 further includes: a clock circuit 140 and a communication circuit 150; the clock circuit 140 is electrically connected to the main control circuit 110; the communication circuit 150 is electrically connected to the main control circuit 110, wherein the communication circuit 150 has RS232, RS485, and a network interface.

[0043] In one specific embodiment, it further includes: a display screen 500; the display screen 500 is electrically connected to the main control circuit 110, and the type of the display screen 500 is a touch display screen 500. In this embodiment, it should be noted that for the 5-inch touch screen interaction design, parameters such as frequency, focus, time, etc. are set and displayed; it supports communication with a PC, and parameters such as frequency, focus, time, etc. can be set and displayed through the PC. The multi-channel design enables the two transducers 200 to independently output two waveforms.

[0044] In summary, it should be noted that the main control circuit 110 includes: an MCU unit 111 and an FPGA unit 112; the MCU unit 111 is bidirectionally electrically connected to the FPGA unit 112, and the FPGA unit 112 is bidirectionally electrically connected to the DDS circuit 120. In this embodiment, it should be noted that the main functions of the MCU: complete the power-on initialization work to make each functional unit of the host work in the initial setting state or the state configured by the user. Secondly, the MCU unit 111 interacts with the touch screen or the PC, receives parameter setting information, and sets parameters for the FPGA and the power amplification circuit 132. Furthermore, the MCU unit 111 automatically identifies the type of the transducer 200 and configures the upper and lower cut-off frequencies of the FPGA, the power amplifier, and the high-pass and low-pass filters. It should also be noted that the main functions of the FPGA: receive the parameter setting information from the MCU and control the DDS to output a phased sine wave signal with a frequency meeting the requirements. Secondly, the FPGA unit 112 receives the driving signals of the corresponding channels through the driving signal feedback circuits of each channel, and controls the phase of the output signal through the internal PLL circuit, so that the driving end signal and the output signal are in phase.

[0045] It should also be noted that it further includes a power supply unit, where the power supply circuit includes a driving power supply circuit 610, a digital power supply circuit 620, and an analog power supply circuit 630. The driving power supply circuit 610 is the system main power supply, which supplies power to the digital power supply circuit 620, the analog power supply circuit 630, and the high-voltage operational amplifier. The digital power supply circuit 620 supplies power to the digital circuit parts such as the MCU, the FPGA, and the DDS. The output voltages of the digital power supply circuit 620 are preferably 1.2V, 1.8V, 2.5V, and 3.3V. The analog power supply circuit 630 supplies power to the DDS analog circuit part, each channel programmable operational amplifier circuit, analog switches, high-pass and low-pass filters, driving signal feedback circuits, etc. The output voltage of the analog power supply circuit 630 is 5V, ±12V.

[0046] It should be noted that although the multi-channel phased focused ultrasound stimulator is introduced by taking this application as an example above, those skilled in the art can understand that this application should not be limited thereto. In fact, users can flexibly set parameters according to their personal preferences and / or actual application scenarios as long as it is reasonable.

[0047] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A multi-channel phase-controlled focused ultrasound stimulator, characterized in that: It comprises a main control board, a transducer and a transducer identification circuit; the number of the transducers is more than two, the main control board is electrically connected to the transducers, the transducer identification circuit is electrically connected to the transducers, and the transducer identification circuit is electrically connected to the main control board; The main control board comprises: a main control circuit, a DDS circuit and a regulating circuit unit; the main control circuit is electrically connected to the DDS circuit, the DDS circuit is electrically connected to the regulating circuit unit, and the regulating circuit unit is electrically connected to the transducer; The DDS circuit is electrically connected to the transducer in a one-to-one correspondence, and the adjustment circuit unit is electrically connected to the transducer in a one-to-one correspondence; The transducer includes an oscillator, and each transducer has a plurality of oscillators inside; the oscillators are electrically connected to the regulating circuit unit accordingly.

2. The multi-channel phase-controlled focused ultrasound stimulator according to claim 1, characterized in that: The regulating circuit unit includes: a waveform adjustment and amplification circuit, a power amplification circuit and an impedance matching circuit; The waveform adjustment and amplification circuit, the power amplification circuit and the impedance matching circuit are all matched with the number of the oscillators; The waveform adjustment and amplification circuit is electrically connected to the DDS circuit, the waveform adjustment and amplification circuit is electrically connected to the power amplifier circuit, the power amplifier circuit is electrically connected to the impedance matching circuit, and the impedance matching circuit is electrically connected to the oscillator.

3. The multi-channel phase-controlled focused ultrasound stimulator according to claim 2, characterized in that: The regulating circuit unit further includes: a filter circuit; the filter circuit matches the number of the vibration elements; The filtering circuit is electrically connected to the waveform adjustment and amplification circuit in a one-to-one correspondence, the filtering circuit is electrically connected to the power amplifier circuit in a one-to-one correspondence, the power amplifier circuit is electrically connected to the impedance matching circuit in a one-to-one correspondence, and the impedance matching circuit is electrically connected to the oscillator in a one-to-one correspondence.

4. The multi-channel phase-controlled focused ultrasound stimulator according to claim 3, characterized in that: The output end of the DDS circuit is electrically connected to the input end of the waveform adjustment and amplification circuit, the output end of the waveform adjustment and amplification circuit is electrically connected to the input end of the filter circuit, the output end of the filter circuit is electrically connected to the input end of the power amplifier circuit, the output end of the power amplifier circuit is electrically connected to the input end of the impedance matching circuit, and the output end of the impedance matching circuit is electrically connected to the input end of the oscillator.

5. The multi-channel phase-controlled focused ultrasound stimulator according to claim 2, characterized in that: Also includes: A driving signal detection circuit; the output end of the impedance matching circuit is electrically connected to the input end of the driving signal detection circuit in a one-to-one correspondence, and the output end of the driving signal detection circuit is electrically connected to the main control circuit.

6. The multi-channel phase-controlled focused ultrasound stimulator according to claim 2, characterized in that: The impedance matching circuit comprises: a first capacitor, a second capacitor, a first inductor, a second inductor and a resistor; One end of the first capacitor is electrically connected to one end of the second capacitor through the first inductor, and the other end of the first capacitor is electrically connected to the other end of the second capacitor; One end of the second capacitor is electrically connected to one end of the resistor through the second inductor, and the other end of the second capacitor is electrically connected to the other end of the resistor.

7. The multi-channel phase-controlled focused ultrasound stimulator according to claim 1, characterized in that: The output end of the transducer is electrically connected to the input end of the transducer identification circuit, and the output end of the transducer identification circuit is electrically connected to the input end of the main control circuit.

8. The multi-channel phase-controlled focused ultrasound stimulator according to any one of claims 1 to 7, characterized in that: The number of the transducers is two, and the number of the vibration elements inside the two transducers is four.

9. The multi-channel phase-controlled focused ultrasound stimulator according to claim 7, characterized in that: The main control board also includes: a clock circuit and a communication circuit; the clock circuit is electrically connected to the main control circuit; the communication circuit is electrically connected to the main control circuit, wherein the communication circuit has RS232, RS485 and a network port.

10. The multi-channel phase-controlled focused ultrasound stimulator according to claim 7, characterized in that: Also includes: Display screen; the display screen is electrically connected to the main control circuit, and the type of the display screen is a touch display screen.

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