Ultrasonic transmitting circuit board and ultrasonic therapeutic device

Abstract

The utility model discloses an ultrasonic transmitting circuit board and an ultrasonic therapeutic apparatus, wherein the ultrasonic transmitting circuit board includes a main control circuit, a transmitting circuit, a power supply circuit and a probe interface; the main control circuit is connected to the probe through the transmitting circuit, and the power supply circuit is connected to the main control circuit and the transmitting circuit; the main control circuit controls the switch operation of the body, and generates a transmitting signal of a corresponding waveform according to the input operation; the transmitting circuit performs current-voltage conversion and voltage amplification on the transmitting signal, and outputs it to the probe for conversion into ultrasonic waves and emission; the power supply circuit converts the input mains electricity into several voltages required for the operation of the main control circuit and the transmitting circuit. The transmitting signal of the corresponding waveform can be generated according to demand, which solves the problem that the transmitting waveform in the existing ultrasonic therapeutic apparatus cannot be changed. At the same time, the transmitting signal performs current-voltage conversion and voltage amplification, and has a higher signal-to-noise ratio than the square wave signal of the traditional pulse emission, and has no odd harmonics, and the back-end transmission line matching is easier to achieve.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to an ultrasonic transmitting circuit board and an ultrasonic therapeutic apparatus. Background Art

[0002] At present, the main control circuit of ultrasonic therapeutic apparatus is as follows Figure 1 As shown in the figure, an 8-bit 51 single-chip microcomputer plus an Altera low-end FPGA is used to drive the display screen, control the ultrasonic emission, and control the instrument's buttons. The ultrasonic pulse emission is achieved by controlling the on-off of the MOS tube in the emission drive circuit. The generated emission waveform is transmitted to the ultrasonic transducer at the instrument probe end through the matching circuit, which can stimulate the generation of ultrasonic waves.

[0003] The control system composed of 51 single-chip microcomputer and FPGA has good real-time performance, but it is difficult to improve flexibility and human-computer interaction friendliness; although FPGA is a low-end product, its price is relatively high and its supply is unstable; at the same time, FPGA development requires high professionalism, product upgrades are difficult, and further increase costs.

[0004] As the main controller, the low-end FPGA has limited storage capacity and requires external memory to implement more complex functions, such as driving the display screen. At the same time, the output signal is usually a low-voltage signal, which requires a corresponding chip to drive it before it can be used by the terminal. In addition, in order to protect the FPGA, a corresponding voltage isolation circuit needs to be designed, which increases the design difficulty and cost.

[0005] The transmitting drive circuit is composed of discrete MOS tubes with poor consistency. At the same time, the on-time and off-time constants of the MOS tubes are relatively large, and the transmitting waveform is a square wave signal and cannot be changed, making it difficult to control accurately. These also further increase the difficulty of matching circuit design. If the transmission line impedance does not match, it will also cause heating problems for the ultrasonic transducer.

[0006] Therefore the prior art still needs to be improved and enhanced. Utility Model Content

[0007] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an ultrasonic transmitting circuit board and an ultrasonic therapeutic apparatus to solve the problem that the transmitting waveform in the existing ultrasonic therapeutic apparatus cannot be changed.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An ultrasonic transmitting circuit board is connected to a probe, comprising a main control circuit, a transmitting circuit, a power supply circuit and a probe interface; the main control circuit is connected to the probe via the transmitting circuit, and the power supply circuit is connected to the main control circuit and the transmitting circuit;

[0010] The main control circuit controls the switch operation of the body and generates a transmission signal of a corresponding waveform according to the input operation;

[0011] The transmitting circuit performs current-voltage conversion and voltage amplification on the transmitting signal, outputs it to the probe, converts it into ultrasonic waves and transmits it;

[0012] The power supply circuit converts the input commercial power into several voltages required for the operation of the main control circuit and the transmitting circuit.

[0013] In the ultrasonic transmitting circuit board, the main control circuit includes a main controller, a first resistor, a first diode and a first capacitor; the ultrasonic transmitting circuit board is also provided with a display screen interface, a camera interface and a probe interface;

[0014] The display pin of the main controller is connected to the display screen through the display screen interface, the probe identification pin of the main controller is connected to the probe interface, the various power pins of the main controller are connected to the power circuit, the camera pin of the main controller is connected to the camera through the camera interface, and the transmission control pin of the main controller is connected to the transmission circuit; the RESET pin of the main controller is connected to one end of the first resistor, the positive electrode of the first diode and the other end of the first capacitor; the other end of the first resistor is connected to the negative electrode of the first diode and the first power supply end, and the other end of the first capacitor is grounded.

[0015] In the ultrasonic transmitting circuit board, the transmitting circuit includes a waveform generator, a first operational amplifier, a second operational amplifier, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor;

[0016] The SCLK pin, SDIO pin, DOUT pin, and CS# pin of the waveform generator are connected one-to-one with the SPI0_CLK_PU pin, SPI0_DIN / SPI0_D1 / GPIO67_PU pin, SPI0_DOUT / SPI0_DO / GPIO68_PU pin, and SPI0_CS / GPIO12_PU pin of the main controller; the IOUT1 pin of the waveform generator is connected to one end of the second capacitor and one end of the second resistor, and the IOUT2 ​​pin of the waveform generator is connected to the other end of the second capacitor and one end of the third resistor; the other end of the second resistor is connected to the inverting input end of the first operational amplifier, one end of the third capacitor, and one end of the fourth resistor; the other end of the third resistor is connected to Connected to the non-inverting input terminal of the first operational amplifier; the negative power supply voltage is input to the negative power supply pin of the first operational amplifier, the positive power supply voltage is input to the positive power supply pin of the first operational amplifier, the output terminal of the first operational amplifier is connected to the other end of the third capacitor, the other end of the fourth resistor and one end of the fifth resistor; the other end of the fifth resistor is connected to one end of the fourth capacitor; the inverting input terminal of the second operational amplifier is connected to the other end of the fourth capacitor, one end of the fifth capacitor and one end of the sixth resistor; the non-inverting input terminal of the second operational amplifier is grounded, the negative power supply pin of the second operational amplifier is input to the negative high voltage, the positive power supply pin of the second operational amplifier is input to the positive high voltage, and the output terminal of the second operational amplifier is connected to the other end of the sixth resistor, the other end of the fifth capacitor and the probe interface.

[0017] In the ultrasonic transmitting circuit board, the transmitting circuit further includes a seventh resistor, an eighth resistor, a sixth capacitor and a seventh capacitor;

[0018] One end of the seventh resistor is connected to one end of the sixth capacitor and the IOUT1 pin of the waveform generator, the other end of the seventh resistor is connected to the other end of the sixth capacitor and the ground, one end of the eighth resistor is connected to one end of the seventh capacitor and the IOUT2 ​​pin of the waveform generator, and the other end of the eighth resistor is connected to the other end of the seventh capacitor and the ground.

[0019] In the ultrasonic transmitting circuit board, the transmitting circuit also includes a ninth resistor and a tenth resistor; the ninth resistor is connected between the in-phase input terminal of the second operational amplifier and the ground, and the tenth resistor is connected between the inverting input terminal of the second operational amplifier and the other end of the fourth capacitor.

[0020] In the ultrasonic transmitting circuit board, a radio frequency card interface is provided on the ultrasonic transmitting circuit board, a radio frequency card is inserted into the radio frequency card interface, and the radio frequency signal pin of the main controller is connected to the radio frequency card through the radio frequency card interface.

[0021] In the ultrasonic transmitting circuit board, an Ethernet interface is provided on the ultrasonic transmitting circuit board, and the Ethernet pin of the main controller is externally connected to an Ethernet cable through the Ethernet interface.

[0022] In the ultrasonic transmitting circuit board, an intelligent battery is arranged on the ultrasonic transmitting circuit board, and the GPIO31_PU / I2C0_SCL pin and the GPIO32_PU / I2C0_SDA pin of the main controller are connected to the data pins of the intelligent battery accordingly.

[0023] An ultrasonic therapeutic apparatus comprises a body and a probe, wherein the body is provided with the ultrasonic transmitting circuit board, and the probe is electrically connected to the ultrasonic transmitting circuit board through a transmission line;

[0024] The ultrasonic transmitting circuit board generates a transmitting signal of corresponding waveform and amplitude according to the input operation, outputs it to the probe, converts it into ultrasonic wave and transmits it.

[0025] In the ultrasonic therapeutic apparatus, an impedance matching circuit and an ultrasonic transducer are provided on the circuit board in the probe, and the impedance matching circuit includes an eighth capacitor, a ninth capacitor, a first inductor, a second inductor and an eleventh resistor;

[0026] One end of the eighth capacitor is connected to the output end of the transmitting circuit on the ultrasonic transmitting circuit board through a transmission line and a probe interface in sequence, and the other end of the eighth capacitor is connected to one end of the first inductor; the other end of the first inductor is connected to one end of the ninth capacitor, one end of the eleventh resistor, one end of the second inductor and one end of the ultrasonic transducer; the other end of the ninth capacitor is connected to the other end of the eleventh resistor and the other end of the second inductor, and the other end of the ultrasonic transducer is grounded.

[0027] Compared with the prior art, the ultrasonic transmitting circuit board and ultrasonic therapeutic apparatus provided by the utility model include a main control circuit, a transmitting circuit, a power supply circuit and a probe interface; the main control circuit is connected to the probe through the transmitting circuit, and the power supply circuit is connected to the main control circuit and the transmitting circuit; the main control circuit controls the switch operation of the body, and generates a transmitting signal of a corresponding waveform according to the input operation; the transmitting circuit performs current-voltage conversion and voltage amplification on the transmitting signal, and outputs it to the probe for conversion into ultrasonic waves and emission; the power supply circuit converts the input mains power into several voltages required for the operation of the main control circuit and the transmitting circuit. The transmitting signal of the corresponding waveform can be generated according to demand, which solves the problem that the transmitting waveform in the existing ultrasonic therapeutic apparatus cannot be changed. At the same time, the transmitting signal performs current-voltage conversion and voltage amplification, and has a higher signal-to-noise ratio than the square wave signal of the traditional pulse emission, and has no odd harmonics, and the back-end transmission line matching is easier to achieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a structural block diagram of the main control circuit of an existing ultrasonic therapeutic apparatus.

[0029] Figure 2 This is a structural block diagram of the ultrasonic therapeutic apparatus provided by the utility model.

[0030] Figure 3 This is a circuit diagram of the first part of the main controller provided by the utility model.

[0031] Figure 4 This is a circuit diagram of the second part of the main controller provided by the utility model.

[0032] Figure 5 This is a circuit diagram of the third part of the main controller provided by the utility model.

[0033] Figure 6 This is a circuit diagram of a transmitting circuit and an impedance matching circuit provided by the utility model. DETAILED DESCRIPTION

[0034] The utility model provides an ultrasonic transmitting circuit board and an ultrasonic therapeutic device. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] See also Figure 2 The ultrasonic therapeutic device provided by the embodiment of the utility model includes a body and a probe. An ultrasonic transmitting circuit board is arranged in the body. The probe is electrically connected to the ultrasonic transmitting circuit board through a transmission line. The ultrasonic transmitting circuit board generates a transmitting signal of corresponding waveform and amplitude (i.e., voltage amplitude) according to an input operation, and outputs it to the probe to be converted into ultrasonic waves and emitted.

[0036] Specifically, the front of the body is an operation panel, a display screen (preferably a liquid crystal display screen) is provided in the middle of the operation panel, and function buttons are provided on the operation panel around the display screen, such as a time button and a power button below the display screen, and a start / stop button on the left side of the display screen.

[0037] The ultrasonic transmitting circuit board is provided with a main control circuit 10, a transmitting circuit 20, a power circuit 30, a power switch button, a probe interface for connecting the probe, and a power input interface; the main control circuit 10 is connected to the probe through the transmitting circuit 20, and the power circuit 30 connects the main control circuit 10 and the transmitting circuit 20. An ultrasonic transducer is provided on the circuit board in the probe; the ultrasonic transducer is electrically connected to the ultrasonic transmitting circuit board through a transmission line and a probe interface in sequence; the power switch button and the power input interface are electrically connected to the main control circuit 10. Three openings are provided on the back of the body for exposing and fixing the key cap of the power switch button, the jack of the probe interface, and the jack of the power input interface.

[0038] The main control circuit 10 detects the pressing state of the power switch button to control the switch operation of the body, and also adjusts the frequency, duty cycle, sound intensity and other parameters of the transmission waveform according to the input operation of the function button, thereby generating a transmission signal of the corresponding waveform; the transmission circuit 20 performs current-voltage conversion and voltage amplification on the transmission signal, and outputs it to the ultrasonic transducer in the probe through the probe interface and the transmission line, converts it into ultrasonic waves and transmits it. The power supply circuit 30 converts the mains power connected to the power input interface into several voltages required for the operation of the main control circuit 10 and the transmission circuit 20.

[0039] Please also read Figure 3 , Figure 4 and Figure 5 The main control circuit 10 includes a main controller (U1A~U1C, the chip has many pins and is divided into three parts when shown in the figure), a first resistor R1, a first diode D1 and a first capacitor C1; the ultrasonic transmitting circuit board is also provided with a display screen interface (which is a prior art, and the specific model can be preferably FCX701B18B1, and the specific pin method is connected according to the pin definition of the main controller, and the connection method is generally a PFC soft cable connection) and a camera interface; the display pin (pin 108 to pin 128) of the main controller (U1C) is connected to the display screen through the display screen interface, the probe identification pin (pin 30 to pin 33) of the main controller (U1A) is connected to the probe interface, and each power pin of the main controller is connected to the power circuit 30, and the main The camera pin of the controller (U1B) is connected to the camera through the camera interface, and the transmission control pin (including SPI0_CLK_PU pin, SPI0_DIN / SPI0_D1 / GPIO67_PU pin, SPI0_DOUT / SPI0_DO / GPIO68_PU pin, SPI0_CS / GPIO12_PU pin) of the main controller (U1B) is connected to the transmission circuit 20; the RESET pin of the main controller (U1A) is connected to one end of the first resistor R1, the positive electrode of the first diode D1 and the other end of the first capacitor C1; the other end of the first resistor R1 is connected to the negative electrode of the first diode D1 and the first power supply end (providing the first voltage VDDIO_CPU_3V3), and the other end of the first capacitor C1 is grounded.

[0040] When the display pins are connected, specifically: GPIO71_PU / RGB_VOGATE / MPU_RD pin, GPIO72_PU / RGB_VOVSYNC / MPU_A0 pin, GPIO73_PU / RGB_VOHSYNC / MPU_CS pin, GPIO74_PU / RGB_VOPCLK / MPU_WR pin, GPIO75_PU / LCD_D0 pin, GPIO76_PU / LCD_D1 pin, GPIO77_PU / LCD_D2 pin, GPIO78_PU / LCD_D3 pin, GPIO79_PU / LCD_D4 pin, GPIO80_PU / LCD_D5 pin, GPIO81_PU / LCD_D6 pin, GPIO82_PU / LCD_D7 pin, GPIO83_PU / LCD_D8 pin of the main controller (U1C). CD_D8 / I2C2_SCL pin, GPIO84_PU / LCD_D9 / I2C2_SDA pin, GPIO85_PU / LCD

[0041] _D10 / I2S_DIN pin, GPIO86_PU / LCD_D11 / I2S_LRCLK pin, GPIO87_PU / LC D_D12 / I2S_BCLK pin, GPIO88_PU / LCD_D13 / I2S_MCLK pin, GPIO89_PU / LCD_D14 / I2S_DOUT / PWM3 pin and GPIO90_PU / LCD_D15 / PWM4 pin are all connected to the display interface.

[0042] When the camera pins are connected, specifically: GPIO25_PU / CSI0_SCLK pin, GPIO26_PU / CSI_PCLK / CSI1_SCLK pin, GPIO27_PU / CSIHSYNC / PWM3 / I2C1_SCL pin, GPIO28_PU / CSI_VSYNC / PWM4 / I2C1_SDA pin, GPI13 / CSI_D0 pin of the main controller (U1B) / CSI1_D1N pin, GPI12 / CSI_D1 / CSI1_D1P pin, GPI9 / CSI_D2 / CSI1_CLKN pin, GPI8 / CSI_D3 / CSI1_CLKP pin, GPI11 / CSI_D4 / CSI1_D0P pin, GPI10 / CSI_D5 / CSI1_D0N pin, GPI4 / CSI_D6 / CSI0_D0N pin, GPI15 / CSI

[0043] The _D7 / CSI0_D0P pin, GPI2 / CSI_D8 / CSI0_CLKP pin, GPI3 / CSI_D9 / CSI0_CLKN pin, GPI6 / CSI_D10 / CSI0_D1P pin and GPI7 / CSI_D11 / CSI0_D1N pin are all connected to the camera interface.

[0044] When the probe identification pin is connected, the AIN_XP pin, AIN_XN pin, AIN_YP pin, and AIN_YN pin of the main controller (U1A) are all connected to the probe interface, supporting four probes, and communicating with the main controller through the onewire protocol.

[0045] Among them, the main controller is preferably of the ZMP series, model ZMP1107; it adopts the ARM9 core and has a built-in 64MBDDR2 SDRAM; it supports complex image processing such as 3A (AWB (auto white balance, automatic white balance) AE (auto exposure automatic exposure) AF (auto focus automatic focus)), Gamma correction, noise reduction, and supports H.265 codec, audio Codec, video codec, ISP processor, image format conversion and other video processing functions; the UI design engine, as the upper computer design software, has more controls, each control has editable properties, styles, and states, supports animation effects such as pop-up windows, movement, rotation, etc., and is based on the RTOS kernel to achieve seconds of booting. The main controller has built-in multiple hardware data interfaces for data interaction. The first resistor R1, the first diode D1 and the first capacitor C1 are used for power-on reset control of the main controller.

[0046] After the ultrasonic therapeutic device is turned on, the corresponding working mode is selected on the operation panel, and the parameters such as the frequency, duty cycle, and sound intensity of the required transmission waveform are mainly set. After receiving these parameters, the main controller transmits them to the waveform generator U2 in the transmission circuit 20 through the SPI protocol to generate a corresponding current-type transmission signal; then the first operational amplifier U3 in the transmission circuit 20 converts it into a voltage-type transmission wave, and the second operational amplifier U4 completes power amplification and transmits it to the probe; the impedance matching circuit 40 on the circuit board in the probe performs matching resonance and then transmits it to the ultrasonic transducer, which can stimulate the generation of the required ultrasonic waves.

[0047] The display signal output by the display pin (including RGB_VOGATE signal, RGB_VOVSYNC signal, RGB_VOHSYNC signal, RGB_VOPCLK signal, LCD_D0~LCD_D15 signal) is transmitted to the display screen through the display screen interface for display. The display content includes time, sound intensity (such as 2.5W / cm2) corresponding to any power (such as 5.0W) 2 ).

[0048] The main controller can also support both analog and digital cameras. During specific implementation, an opening is set on the back or side of the body to expose the camera interface; any external camera is connected to the main controller through the camera interface, mainly to complete the archiving of user information (including identity ID, fingerprint, portrait) and portrait and the connection of remote video, so as to facilitate video communication between manufacturers, doctors and users.

[0049] The 65th to 67th pins of the main controller are connected one-to-one with the function key, the time key, and the power key, and the corresponding key functions are executed according to the corresponding key signals (KEY1, KEY2, KEY3).

[0050] like Figure 3 As shown, preferably, a radio frequency card interface is also provided on the ultrasonic transmitting circuit board (which is a prior art, and the specific preferred model is RC522 NFC; it is connected to the SPI1 interface of the main controller through the SPI protocol), and a radio frequency card is inserted into the radio frequency card interface, and the radio frequency signal pins (pins 100 to 104) of the main controller (U1C) are connected to the radio frequency card through the radio frequency card interface, specifically: the GPIO93_PU / LCD_D18 / SDA_CMD / SPI1_SS pin, GPIO94_PU / LCD_D19 / SPI1_SCLK / SD2_MCK pin, GPIO95_PU / LCD_D20 / SPI1_DOUT / SD2_D0 pin, GPIO96_PU / LCD_D21 / SPI1_DIN / SD2_D1 pin, and GPIO97_PU / LCD_D22 / SPI1_HOLD / I2C2_SDA pin of the main controller (U1C) are all connected to the radio frequency card interface.

[0051] The radio frequency signal transmitted on the radio frequency signal pin (including RS522_CS signal, RS522_CLK signal, RS522_MOSI signal, RS522_MISO signal and RS522_RST signal). The radio frequency card mainly records the user's basic information and the remaining number of working times; the user can only start the ultrasonic therapeutic device by swiping the card (that is, when the card is swiped, the radio frequency signal communicates with the main controller, and the main controller starts working). After a treatment cycle, the main controller reduces the number of working times corresponding to the radio frequency signal by one until it is used up and recharged. After swiping the card, the main controller can identify the data of the radio frequency signal and automatically jump to the working mode required by the user. There is no need to manually set parameters and personalize the working plan. It is used to realize the card swiping start and personalized customization functions.

[0052] Preferably, the ultrasonic transmitting circuit board is also provided with an Ethernet interface, and the Ethernet pins (pins 46 to 55, i.e. Figure 3The pins with the prefix DSI_ on the left are connected to an Ethernet cable through the Ethernet interface to achieve network connection and communication with other external devices. It is mainly used to access the hospital's information system and cooperate with the camera for remote diagnosis and treatment guidance.

[0053] In the specific implementation, the main controller also has other functions and corresponding pins, such as touch, SD storage, serial communication, buzzer alarm, microphone, smart battery, etc. These functions are used according to user needs, and corresponding functional interfaces are set on the ultrasonic transmitting circuit board to connect the corresponding pins, thereby improving the scalability and flexibility of the ultrasonic therapeutic device.

[0054] For example, a smart battery can be set on the ultrasonic transmitter circuit board, and the GPIO31_PU / I2C0_SCL pin and GPIO32_PU / I2C0_SDA pin of the main controller (U1B) are connected to the data pins (SCL pin and SDA pin) of the smart battery. At present, analog voltage is often used to indicate the current battery power, which has poor accuracy; this embodiment uses a battery built-in fuel gauge to directly transmit the current battery information to the main controller through the data pin, and display the current battery power on the display screen.

[0055] A touch screen may be added to the surface of the display screen, which may be a capacitive touch screen or a resistive touch screen, and a touch screen interface is also provided on the ultrasonic transmitting circuit board. Pins 61 to 64 of the main controller (U1B) are connected to the touch screen interface, and the flexible cable of the touch screen is inserted into the touch screen interface; the touch human-computer interaction function is realized through touch signals (signals with a prefix of CTP_). The touch screen interface is an existing common interface, such as a contact connector with a model of FPC-1.0-4P, whose pins correspond one-to-one to the connected flexible cable.

[0056] A buzzer can also be arranged on the ultrasonic transmitting circuit board, and the 81st pin of the main controller (U1B) is connected to one end of the buzzer to realize buzzer alarm.

[0057] A card slot may also be provided on the ultrasonic transmitting circuit board, and an SD card is inserted into the card slot; pins 131, 132, 135 and 136 of the main controller (U1B) are connected to the SD card through the card slot to realize the SD storage function.

[0058] A microphone interface (external earphone) may also be provided on the ultrasonic transmitting circuit board, and the 35th and 38th pins of the main controller (U1A) are connected to the microphone interface to transmit microphone signals.

[0059] A USB interface (external USB device) may also be provided on the ultrasonic transmitting circuit board, and the USB_DM pin and USB_DP pin of the main controller (U1A) are connected to the USB interface.

[0060] Please also read Figure 6 The transmitting circuit 20 includes a waveform generator U2, a first operational amplifier U3, a second operational amplifier U4, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6; the SCLK pin, SDIO pin, DOUT pin, and CS# pin of the waveform generator U2 are connected to the SPI0_CLK_PU pin, SPI0_DIN / SPI0_D1 / GPIO67_PU pin, SPI0_DOUT / The SPI0_DO / GPIO68_PU pin and the SPI0_CS / GPIO12_PU pin are connected one to one; the IOUT1 pin of the waveform generator U2 is connected to one end of the second capacitor C2 and one end of the second resistor R2, and the IOUT2 ​​pin of the waveform generator U2 is connected to the other end of the second capacitor C2 and one end of the third resistor R3; the other end of the second resistor R2 is connected to the inverting input terminal (pin 4) of the first operational amplifier U3, one end of the third capacitor C3 and one end of the fourth resistor R4; the other end of the third resistor R3 is connected to the non-inverting input terminal of the first operational amplifier U3 (Pin 3); the negative power supply voltage -VCC (connected to the negative pole of the power supply end) is input to the negative power supply pin (Pin 2) of the first operational amplifier U3, the positive power supply voltage +VCC (connected to the positive pole of the power supply end) is input to the positive power supply pin (Pin 6) of the first operational amplifier U3, the output end (Pin 1) of the first operational amplifier U3 is connected to the other end of the third capacitor C3, the other end of the fourth resistor R4 and one end of the fifth resistor R5; the other end of the fifth resistor R5 is connected to one end of the fourth capacitor C4; the inverting input end (Pin 4) of the second operational amplifier U4 is connected to the other end of the fourth capacitor C4, the other end of the fourth resistor R4 and one end of the fifth resistor R5; the other end of the fifth resistor R5 is connected to one end of the fourth capacitor C4; the inverting input end (Pin 5) of the second operational amplifier U4 is connected to the other end of the fourth capacitor C4, the One end of the fifth capacitor C5 and one end of the sixth resistor R6; the in-phase input terminal (pin 3) of the second operational amplifier U4 is grounded, the negative power pin (pin 2) of the second operational amplifier U4 inputs a negative high voltage -HV (connected to the negative electrode of the high voltage end), the positive power pin (pin 6) of the second operational amplifier U4 inputs a positive high voltage +HV (connected to the positive electrode of the high voltage end), and the output terminal (pin 1) of the second operational amplifier U4 is connected to the other end of the sixth resistor R6, the other end of the fifth capacitor C5 and the probe interface (the dotted line in the figure indicates that the probe interface is connected to the ultrasonic transmitting circuit board in the probe through a transmission line).

[0061] The waveform generator U2 is preferably of model AD9102, which has the advantages of low power consumption, high performance, and high signal-to-noise ratio. It integrates ADC, DDS, and SRAM on-chip memory. It communicates with the main controller through the SPI protocol (i.e., each signal with SPI_ as the prefix) to complete the generation and control of various transmission waveforms required for ultrasound.

[0062] The transmitting circuit 20 adopts a linear transmission mode, and the current type transmission signal output by the IOUT1 pin and the IOUT2 ​​pin of the waveform generator U2 is converted into a corresponding voltage type transmission wave through the first operational amplifier U3, realizing low-power synchronous integrated DAC conversion and waveform generation functions. The voltage amplitude of the transmission wave is then amplified to the amplitude of positive and negative high voltage ±HV through the second operational amplifier U4, and transmitted to the probe through the probe interface, and the ultrasonic transducer generates ultrasonic waves.

[0063] The first operational amplifier U3 is a current-to-voltage precision operational amplifier with a preferred model of AD4897, the second operational amplifier U4 is a high-voltage operational amplifier with a preferred model of OPA462, the second capacitors C2 and C3 are filter capacitors at the output end, R2 and R3 are input matching resistors, the third capacitor C3 and the fourth resistor R4 constitute the feedback network of the first operational amplifier U3, the combination of R5 and C4 is used for matching DC isolation, and R6 and C5 constitute the feedback network of the second operational amplifier U4.

[0064] Preferably, the transmitting circuit 20 also includes a seventh resistor R7, an eighth resistor R8, a sixth capacitor C6 and a seventh capacitor C7; one end of the seventh resistor R7 is connected to one end of the sixth capacitor C6 and the IOUT1 pin of the waveform generator U2, the other end of the seventh resistor R7 is connected to the other end of the sixth capacitor C6 and the ground, one end of the eighth resistor R8 is connected to one end of the seventh capacitor C7 and the IOUT2 ​​pin of the waveform generator U2, and the other end of the eighth resistor R8 is connected to the other end of the seventh capacitor C7 and the ground.

[0065] R7 and C6 are used to filter and match the transmit signal output from the IOUT1 pin, and R8 and C7 are used to filter and match the transmit signal output from the IOUT2 ​​pin.

[0066] Preferably, the transmitting circuit 20 further includes a ninth resistor R9 and a tenth resistor R10; the ninth resistor R9 is connected between the non-inverting input terminal of the second operational amplifier U4 and the ground, and the tenth resistor R10 is connected between the inverting input terminal of the second operational amplifier U4 and the other end of the fourth capacitor C4. R9 and R10 are input matching resistors.

[0067] The circuit board in the probe is also provided with an impedance matching circuit 40 and an ultrasonic transducer. Figure 6As shown, the impedance matching circuit 40 includes an eighth capacitor C8, a ninth capacitor C9, a first inductor L1, a second inductor L2 and an eleventh resistor R11; one end of the eighth capacitor C8 is connected to the output end of the second operational amplifier U4 (i.e., the output end of the transmitting circuit) through a transmission line and a probe interface in sequence, and the other end of the eighth capacitor C8 is connected to one end of the first inductor L1; the other end of the first inductor L1 is connected to one end of the ninth capacitor C9, one end of the eleventh resistor R11, one end of the second inductor L2 and one end of the ultrasonic transducer TR1; the other end of the ninth capacitor C9 is connected to the other end of the eleventh resistor R11 and the other end of the second inductor L2, and the other end of the ultrasonic transducer TR1 is grounded.

[0068] C8, C9, L1, L2, and R11 form an impedance matching circuit for the transmission line from the second operational amplifier to the ultrasonic transducer to reduce the loss and distortion during the transmission of the transmitting waveform.

[0069] It should be understood that the voltage conversion function of the power supply circuit 30 is a prior art, which provides appropriate power support for each functional block and outputs a corresponding voltage, such as Figures 3 to 6 As shown, VDD, DVDD, ±VCC, ±HV, DLDO1 / 2, CLDO, CVDD, and prefixes AVCC33_, AVCC11_, AVDD11_, VDDIO_, VDD_, VREF_, HPVDD_ all represent corresponding voltages and have corresponding voltage terminals; the voltage range is shown in brackets below some voltages. The specific circuit of the power supply circuit 30 is designed according to safety regulations and EMC requirements to ensure sufficient filtering and energy storage requirements.

[0070] To sum up, the ultrasonic transmitting circuit board and ultrasonic therapeutic device provided by the utility model use ZMP series chips as the main controller, and their high integration greatly reduces the material cost and design difficulty; it supports BT.601 / MIPI CSI-2 standard camera interface and RGB / MIPI-DSI display interface, and also has rich peripheral interfaces such as SPI / UART / MMC / SD, with high scalability, high flexibility and high integration, and can achieve seamless docking and communication with other terminals.

[0071] The main controller has a built-in image processing unit, which can be used for UI development and interface design, breaking through the monotonous interface style of traditional FPGA solutions; based on the RTOS kernel, it can realize the function of booting in seconds. In addition, the main controller and the transmitting circuit communicate through high-speed SPI, and adopt a linear transmission scheme. The main controller can control the transmitting circuit to generate a transmission wave of any complex waveform according to demand, modulate the waveform in real time, and accurately control the transmission waveform; the generated transmission waveform is a sine wave, which has a higher signal-to-noise ratio than the square wave signal of traditional pulse transmission, and has no odd harmonics. The back-end transmission line matching is easier to achieve, which effectively solves the problem of heating of the ultrasonic transducer. The waveform generator has low power consumption and high signal-to-noise ratio, and its chip area is much smaller than that of the traditional MOS solution.

[0072] The main controller has a high functional integration, which greatly improves the signal-to-noise ratio of the overall circuit, improves electromagnetic compatibility, and makes it easier to meet regulations and industry standards for medical devices.

[0073] The division of the above functional modules is only for illustration. In practical applications, the above functions can be assigned to different functional modules as needed, that is, divided into different functional modules to complete all or part of the functions described above.

[0074] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the claims attached to the utility model.

Claims

1. An ultrasonic transmitting circuit board, connected to a probe, characterized in that: It includes a main control circuit, a transmitting circuit, a power supply circuit and a probe interface; the main control circuit is connected to the probe through the transmitting circuit, and the power supply circuit is connected to the main control circuit and the transmitting circuit; The main control circuit controls the switch operation of the body and generates a transmission signal of a corresponding waveform according to the input operation; The transmitting circuit performs current-voltage conversion and voltage amplification on the transmitting signal, outputs it to the probe, converts it into ultrasonic waves and transmits it; The power supply circuit converts the input commercial power into several voltages required for the operation of the main control circuit and the transmitting circuit.

2. The ultrasonic transmitting circuit board according to claim 1, characterized in that: The main control circuit includes a main controller, a first resistor, a first diode and a first capacitor; the ultrasound transmitting circuit board is also provided with a display screen interface, a camera interface and a probe interface; The display pin of the main controller is connected to the display screen through the display screen interface, the probe identification pin of the main controller is connected to the probe interface, each power pin of the main controller is connected to the power circuit, the camera pin of the main controller is connected to the camera through the camera interface, and the transmission control pin of the main controller is connected to the transmission circuit; The RESET pin of the main controller is connected to one end of the first resistor, the anode of the first diode and the other end of the first capacitor; The other end of the first resistor is connected to the cathode of the first diode and the first power supply end, and the other end of the first capacitor is grounded.

3. The ultrasonic transmitting circuit board according to claim 2, characterized in that: The transmitting circuit includes a waveform generator, a first operational amplifier, a second operational amplifier, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor; The SCLK pin, SDIO pin, DOUT pin, and CS# pin of the waveform generator are connected to the SPI0_CLK_PU pin, SPI0_DIN / SPI0_D1 / GPIO67_PU pin, SPI0_DOUT / SPI0 _DO / GPIO68_PU pin and SPI0_CS / GPIO12_PU pin are connected one-to-one; the IOUT1 pin of the waveform generator is connected to one end of the second capacitor and one end of the second resistor, and the IOUT2 ​​pin of the waveform generator is connected to the other end of the second capacitor and one end of the third resistor; the other end of the second resistor is connected to the inverting input terminal of the first operational amplifier, one end of the third capacitor and one end of the fourth resistor; the other end of the third resistor is connected to the non-inverting input terminal of the first operational amplifier; the negative power supply voltage is input to the negative power supply pin of the first operational amplifier, the positive power supply voltage is input to the positive power supply pin of the first operational amplifier, the output terminal of the first operational amplifier is connected to the other end of the third capacitor, the other end of the fourth resistor and one end of the fifth resistor; the other end of the fifth resistor is connected to one end of the fourth capacitor; the inverting input terminal of the second operational amplifier is connected to the other end of the fourth capacitor, one end of the fifth capacitor and one end of the sixth resistor; the non-inverting input terminal of the second operational amplifier is grounded, the negative power supply pin of the second operational amplifier is input with negative high voltage, the positive power supply pin of the second operational amplifier is input with positive high voltage, and the output terminal of the second operational amplifier is connected to the other end of the sixth resistor, the other end of the fifth capacitor and the probe interface.

4. The ultrasonic transmitting circuit board according to claim 3, characterized in that: The transmitting circuit also includes a seventh resistor, an eighth resistor, a sixth capacitor and a seventh capacitor; One end of the seventh resistor is connected to one end of the sixth capacitor and the IOUT1 pin of the waveform generator, the other end of the seventh resistor is connected to the other end of the sixth capacitor and the ground, one end of the eighth resistor is connected to one end of the seventh capacitor and the IOUT2 ​​pin of the waveform generator, and the other end of the eighth resistor is connected to the other end of the seventh capacitor and the ground.

5. The ultrasonic transmitting circuit board according to claim 3, characterized in that: The transmitting circuit also includes a ninth resistor and a tenth resistor; the ninth resistor is connected between the in-phase input terminal of the second operational amplifier and the ground, and the tenth resistor is connected between the inverting input terminal of the second operational amplifier and the other end of the fourth capacitor.

6. The ultrasonic transmitting circuit board according to claim 3 or 5, characterized in that: The ultrasonic transmitting circuit board is provided with a radio frequency card interface, a radio frequency card is inserted into the radio frequency card interface, and the radio frequency signal pin of the main controller is connected to the radio frequency card through the radio frequency card interface.

7. The ultrasonic transmitting circuit board according to claim 3 or 5, characterized in that: The ultrasonic transmitting circuit board is provided with an Ethernet interface, and the Ethernet pin of the main controller is externally connected to an Ethernet cable through the Ethernet interface.

8. The ultrasonic transmitting circuit board according to claim 3 or 5, characterized in that: An intelligent battery is arranged on the ultrasonic transmitting circuit board, and the GPIO31_PU / I2C0_SCL pin and the GPIO32_PU / I2C0_SDA pin of the main controller correspond to the data pins connected to the intelligent battery.

9. An ultrasonic therapeutic apparatus, comprising a body and a probe, characterized in that: The body is provided with an ultrasonic transmitting circuit board as claimed in any one of claims 1 to 8, and the probe is electrically connected to the ultrasonic transmitting circuit board via a transmission line; The ultrasonic transmitting circuit board generates a transmitting signal of corresponding waveform and amplitude according to the input operation, outputs it to the probe, converts it into ultrasonic wave and transmits it.

10. The ultrasonic therapeutic apparatus according to claim 9, characterized in that: An impedance matching circuit and an ultrasonic transducer are provided on the circuit board in the probe, and the impedance matching circuit includes an eighth capacitor, a ninth capacitor, a first inductor, a second inductor and an eleventh resistor; One end of the eighth capacitor is connected to the output end of the transmitting circuit on the ultrasonic transmitting circuit board through a transmission line and a probe interface in sequence, and the other end of the eighth capacitor is connected to one end of the first inductor; the other end of the first inductor is connected to one end of the ninth capacitor, one end of the eleventh resistor, one end of the second inductor and one end of the ultrasonic transducer; the other end of the ninth capacitor is connected to the other end of the eleventh resistor and the other end of the second inductor, and the other end of the ultrasonic transducer is grounded.

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