Programmable multifunctional arbitrary waveform single array element ultrasonic excitation device

Abstract

The utility model belongs to the technical field of ultrasonic excitation, and aims to solve the problems that the signal generated by the conventional system is single and the driving capability of the conventional system to an ultrasonic transducer is weak. The programmable multifunctional arbitrary waveform single array element ultrasonic excitation device comprises a PC, a control panel, a waveform generation board and an ultrasonic transducer, the output end of the PC is connected with the control panel, and the PC is used for outputting waveform parameters of each channel; the control board comprises a communication interface module and an FPGA, the communication interface module is connected with the PC board, the FPGA is connected with the waveform generation board, and the FPGA is used for distributing waveform parameters to the waveform generation board; the waveform generation board is connected with the ultrasonic transducer through an amplification circuit board, and an output signal of the waveform generation board excites the ultrasonic transducer to output ultrasonic waves with specific frequency after being amplified. According to the utility model, high-precision, high-frequency, high-voltage and digital ultrasonic excitation can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic excitation, and in particular relates to a programmable multifunctional arbitrary waveform single-element ultrasonic excitation device. Background Art

[0002] Since the multi-dimensional parameters of the ultrasonic signal output by the ultrasonic transducer are different for different usage scenarios, the required driving signals are also different. Currently, it is an important demand to use high-frequency, high-voltage and diversified signals to drive the ultrasonic transducer to emit ultrasound.

[0003] Therefore, how to efficiently and stably excite and transmit ultrasound and achieve high-precision, high-frequency, high-voltage, diversified and digital ultrasonic excitation is a key issue. Utility Model Content

[0004] In order to solve at least one of the above technical problems existing in the prior art, the present utility model provides a programmable multifunctional arbitrary waveform single-element ultrasonic excitation device.

[0005] The utility model is implemented by the following technical solution: a programmable multifunctional arbitrary waveform single-element ultrasonic excitation device, comprising a PC, a control board, a waveform generation board, an amplifying circuit board and an ultrasonic transducer; the output end of the PC is connected to the control board, and the PC is used to output the waveform parameters of each channel; the control board includes a communication interface module and an FPGA, wherein the communication interface module is connected to the PC board, and the FPGA is connected to the waveform generation board, and the FPGA is used to distribute the waveform parameters to the waveform generation board; the waveform generation board is connected to the ultrasonic transducer via the amplifying circuit board, and the output signal of the waveform generation board is amplified to excite the ultrasonic transducer to output ultrasonic waves of a specific frequency.

[0006] Preferably, the FPGA includes a data communication module and a waveform generation board control module, and the communication interface module includes an Ethernet communication interface and a USB communication interface; wherein the data communication module is connected to the Ethernet communication interface and the USB communication interface, and the waveform generation board control module is connected to the waveform generation board.

[0007] Preferably, the waveform generation board includes a clock module circuit and a digital-to-analog conversion circuit, the input ends of the clock module circuit and the digital-to-analog conversion circuit are both connected to the waveform generation board control module, the output end of the clock module circuit is connected to the digital-to-analog conversion circuit, and the output end of the digital-to-analog conversion circuit is connected to the amplifier circuit board.

[0008] Preferably, the amplifying circuit board includes a differential current converter module circuit, a voltage amplifier module circuit, a high-voltage amplifier module circuit and a power amplifier module circuit. The differential current converter module circuit is connected to the output end of the clock module circuit and the digital-to-analog conversion circuit. The output end of the differential current converter module circuit is connected to the voltage amplifier module circuit. The output end of the voltage amplifier module circuit is connected to the high-voltage amplifier module circuit. The output end of the high-voltage amplifier module circuit is connected to the power amplifier module circuit. The output end of the power amplifier module circuit is connected to the ultrasonic transducer.

[0009] Preferably, the chip models of the clock module circuit are AD9515 and CDCV304, and the chip model of the digital-to-analog conversion circuit is AD9106.

[0010] Preferably, the chip model of the differential current converter module is OPA695, the chip model of the voltage amplifier module is LM6171, and the high-voltage amplifier module includes a current buffer and a transformer group, wherein the chip model of the current buffer is LMH6321.

[0011] Preferably, it also includes a power module circuit for supplying power to the PC, the control board, the waveform generation board and the ultrasonic transducer.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model can realize the output of multiple signals such as sine wave, square wave, triangle wave, up-ramp wave and down-ramp wave through the control of PC, and solves the problems of single signal generated by existing system and weak driving ability of ultrasonic transducer by using hardware such as control board and waveform generation board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of a programmable multifunctional arbitrary waveform single-element ultrasonic excitation device provided by the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the control panel in the present utility model;

[0017] Figure 3 This is a schematic diagram of the connection relationship between the FPGA, PHY chip and network port in the data communication module of the present invention;

[0018] Figure 4 This is a schematic structural diagram of the waveform generating plate in the present invention;

[0019] Figure 5 This is a schematic diagram of the digital-to-analog conversion circuit structure in the waveform generation board of the present invention;

[0020] Figure 6 This is a schematic diagram of the circuit structure of the clock module in the waveform generation board of the present invention;

[0021] Figure 7 This is a schematic diagram of the overall structure of the enlarged circuit board in the present utility model;

[0022] Figure 8 This is a schematic diagram of the circuit structure of the enlarged circuit board in the present invention. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the efficacy and purpose that can be achieved by the present invention, should fall within the scope of the technical content disclosed by the present invention. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0025] The utility model provides an embodiment:

[0026] like Figure 1As shown, a programmable multifunctional arbitrary waveform single-element ultrasonic excitation device includes a PC, a control board, a waveform generation board, an amplifying circuit board, and an ultrasonic transducer; the output end of the PC is connected to the control board, and the PC is used to output the waveform parameters of each channel; the control board includes a communication interface module and an FPGA, wherein the communication interface module is connected to the PC board, and the FPGA is connected to the waveform generation board, and the FPGA is used to distribute the waveform parameters to the waveform generation board; the waveform generation board is connected to the ultrasonic transducer through the amplifying circuit board, and the output signal of the waveform generation board is amplified to excite the ultrasonic transducer to output ultrasonic waves of a specific frequency.

[0027] The PC sends the waveform parameters of each channel to the control board via the Gigabit Ethernet interface. The control board distributes the parameter information to the waveform generation board via the RS-485 bus. The waveform generation board uses DDS technology to generate the corresponding output signal. The waveform, frequency, phase, amplitude, number of cycles, and the interval between each transmission of the output signal can all be adjusted. The output signal of the waveform generation board is amplified and excites the ultrasonic transducer to output ultrasonic waves of a specific frequency.

[0028] like Figure 2 As shown, the FPGA includes a data communication module and a waveform generation board control module, and the communication interface module includes an Ethernet communication interface and a USB communication interface. The data communication module is connected to the Ethernet communication interface and the USB communication interface, and the waveform generation board control module is connected to the waveform generation board, respectively providing drive signals for the clock module circuit and the digital-to-analog conversion circuit of the waveform generation board. The Gigabit Ethernet communication interface is the main communication interface, and the USB communication interface is the backup communication interface. Figure 3 As shown in the figure, the chip model used for the Ethernet communication interface is RTL8211. One side of the RTL8211 is connected to the FPGA, and the other side is connected to the RJ45 network port. The RTL8211 is a three-speed adaptive Ethernet transceiver chip that provides MAC connection for interfaces such as GMII / RGMII. The data transmission rate can reach 1000Mbit / s, realizing Gigabit Ethernet data communication between the FPGA and the PC.

[0029] like Figure 4 As shown, the waveform generation board includes a clock module circuit and a digital-to-analog conversion circuit. The input ends of the clock module circuit and the digital-to-analog conversion circuit are both connected to the waveform generation board control module, the output end of the clock module circuit is connected to the digital-to-analog conversion circuit, and the output end of the digital-to-analog conversion circuit is connected to the amplifier circuit board.

[0030] The clock module circuit uses AD9515 and CDCV304 chips. The AD9515 is a clock distribution IC with a delay adjustment function. The CDCV304 uses a 3.3V power supply voltage, has a 200MHz bandwidth, and output clock jitter is less than 100ps. The digital-to-analog conversion circuit uses the AD9106 chip. When powered by 3.3V and operating at a full rate of 180MSPS, the chip's maximum power consumption is only 315mW. It also integrates an on-chip pattern memory with a capacity of 4096×12 bits. Combined with control of the chip's control registers, it can generate complex waveforms.

[0031] like Figure 5 As shown, this embodiment needs to realize the individual control of the output signals of all channels and generate analog waveforms with arbitrarily controllable parameters such as frequency, phase, amplitude and waveform. This embodiment uses the AD9106 chip of ADI Company as the signal generation chip, as shown in FIG. Figure 5 The figure shows the circuit diagram of the digital-to-analog conversion circuit designed using the AD9106 chip. The AD9106 peripheral ports include an SPI configuration port, a clock input port, a power supply port, and a signal output port. The SPI configuration port is linked to the FPGA of the control board through resistors R31, R32, R34, R35, R42, and R43. The clock input port is linked to the output clock of the clock module circuit, and the power supply port is linked to the power module circuit.

[0032] The AD9106 is a highly integrated, high-performance, 4-channel differential current-output DAC. It features four independent DACs, one for each of the four channels, enabling independent control of the output signal for each channel. This allows for signal output for a 16-channel ultrasonic phased array system using only four chips. As the number of channels increases, relying solely on the FPGA's internal RAM to store each channel's data becomes impractical. External SRAM chips, however, significantly increase in space, cost, and design complexity as the number of channels increases, making them a poor choice. The AD9106 features an on-chip pattern memory with a capacity of 4096 x 12 bits, which, combined with control of the chip's control registers, enables complex waveform generation. The AD9106 is compact and low-power. Housed in a 32-pin LFCSP package, it measures only 5 mm x 5 mm. When powered by 3.3V and operating at a full 180 MSPS rate, it consumes a maximum of 315 mW. The AD9106 is controlled via an SPI interface; the desired output signal is controlled by changing the values ​​of the chip's integrated control registers.

[0033] like Figure 6As shown, the clock module circuit of this embodiment uses TI's CDCV304 universal clock buffer as a clock distribution chip. This chip operates on a 3.3V supply voltage, has a 200MHz bandwidth, four output interfaces, and output clock jitter of less than 100ps. On a single circuit board, it can provide clock signals for four DAC chips and output 16 analog signals. To enable expansion across multiple circuit boards, an AD9515 is connected between the 180MHz active crystal oscillator and the clock distributor. This chip also operates on a 3.3V supply voltage and can output 800MHz LVDS differential signals, providing the system with a high-performance clock signal with extremely low jitter and phase noise.

[0034] like Figure 7 、 Figure 8 As shown, the amplifier circuit board includes a differential current converter module circuit, a voltage amplifier module circuit, a high-voltage amplifier module circuit and a power amplifier module circuit. The differential current converter module circuit is connected to the output end of the clock module circuit and the digital-to-analog conversion circuit, the output end of the differential current converter module circuit is connected to the voltage amplifier module circuit, the output end of the voltage amplifier module circuit is connected to the high-voltage amplifier module circuit, the output end of the high-voltage amplifier module circuit is connected to the power amplifier module circuit, and the output end of the power amplifier module circuit is connected to the ultrasonic transducer.

[0035] The amplitude and power of the signal generated by the signal generation circuit in this embodiment are insufficient to drive the ultrasonic transducer normally. To achieve continuous drive, the voltage signal needs to be a continuous wave, so the voltage and power amplifier modules must have high-voltage continuous operation capabilities. The differential current signal output by the waveform generation board is first converted into a voltage signal by a differential current converter. The low voltage signal is then amplified to 24Vpp by a voltage amplifier. The voltage signal is further amplified by the high-voltage amplifier module, with a maximum output of 96Vpp. Finally, the signal is amplified by the power amplifier module to drive the ultrasonic transducer. The OPA695 is connected to port 2 of the LM6171. Port 6 of the LM6171 is the output port and is connected to input port 3 of three LMH6321s. Port 6 of the LMH6321 is the output port and is connected to a transformer. The transformer output is connected to the power amplifier circuit composed of 2SC5171 and 2SA1930, ultimately resulting in a high-power, high-voltage signal output.

[0036] The differential current amplifier uses the OPA695 to convert current-to-voltage signals. With a gain of 8, it boasts a bandwidth of 450MHz. Operating from a 5V supply, it can output a maximum ±4.2V voltage signal. Housed in a 6-pin SOT-23 package measuring only 1.6mm × 2.9mm, it delivers a maximum power of 129mW at full output. The voltage amplifier uses the LM6171 unity-gain voltage feedback amplifier as its core component. Operating from dual ±12V supplies, it boasts an extremely high slew rate and a unity-gain bandwidth of 100MHz, while consuming a maximum power of 730mW. To further amplify the voltage signal and achieve a higher output voltage, a high-voltage amplifier module was designed. Because no chip can directly amplify the signal to 100Vpp while maintaining high-frequency distortion, a current buffer plus transformer design was employed. The signal is output in parallel through the current buffers, further amplified by the transformer, and then connected in series with the transformer output, achieving an extremely high voltage output. The LMH6321 is a current buffer capable of outputting a maximum current of 300mA. Three parallel current buffers are connected to a transformer to further amplify the signal. The transformer output is connected in series, amplifying the voltage sixfold. The power amplifier module utilizes a dual power supply and uses a pair of transistors, the 2SA1930 and 2SC5171, as power amplifier components. Q1 and Q3 are 2SC5171s, while Q2 and Q4 are 2SA1930s. When the signal is in the positive half-axis, Q1 conducts and Q2 is off. When the signal is in the negative half-axis, Q2 conducts and Q1 is off. Because transistors have a forward voltage, this circuit will not function below this voltage, resulting in crossover distortion. To address this issue, a diode D1 and D2, with the same forward voltage, is connected in parallel between the emitter and base of each transistor. Diodes D1 and D2 keep the transistors in a slightly forward state, allowing them to amplify the output signal even when the input signal is below the forward voltage, thus eliminating crossover distortion. The emitter of the transistor is in a slightly conductive state, and the transistor can work as long as the input signal is present, thus avoiding the occurrence of crossover distortion.

[0037] The utility model can realize the output of multiple signals such as sine wave, square wave, triangle wave, up-ramp wave and down-ramp wave through the control of PC, and can realize high-precision control of output signal with frequency of 0-10MHz, and the peak-to-peak voltage is adjustable from 0 to 96V. The hardware is used to solve the problems of single signal generated by the existing system and weak driving ability of the ultrasonic transducer, and realize a high-precision, high-frequency, high-voltage and digital ultrasonic excitation device.

[0038] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A programmable multifunctional arbitrary waveform single-element ultrasonic excitation device, characterized by: Includes PC, control board, waveform generation board, amplifier circuit board and ultrasonic transducer; The output end of the PC is connected to the control board, and the PC is used to output the waveform parameters of each channel; The control board includes a communication interface module and an FPGA, wherein the communication interface module is connected to the PC board, and the FPGA is connected to the waveform generation board. The FPGA is used to distribute waveform parameters to the waveform generation board; The waveform generating board is connected to the ultrasonic transducer through an amplifying circuit board. The output signal of the waveform generating board is amplified to stimulate the ultrasonic transducer to output ultrasonic waves of a specific frequency.

2. The programmable multifunctional arbitrary waveform single-element ultrasonic excitation device according to claim 1, characterized in that: The FPGA includes a data communication module and a waveform generation board control module, and the communication interface module includes an Ethernet communication interface and a USB communication interface; wherein the data communication module is connected to the Ethernet communication interface and the USB communication interface, and the waveform generation board control module is connected to the waveform generation board.

3. The programmable multifunctional arbitrary waveform single-element ultrasonic excitation device according to claim 2, characterized in that: The waveform generation board includes a clock module circuit and a digital-to-analog conversion circuit. The input ends of the clock module circuit and the digital-to-analog conversion circuit are both connected to the waveform generation board control module, the output end of the clock module circuit is connected to the digital-to-analog conversion circuit, and the output end of the digital-to-analog conversion circuit is connected to the amplifier circuit board.

4. The programmable multifunctional arbitrary waveform single-element ultrasonic excitation device according to claim 3, characterized in that: The amplifying circuit board includes a differential current converter module circuit, a voltage amplifier module circuit, a high-voltage amplifier module circuit and a power amplifier module circuit. The differential current converter module circuit is connected to the output end of the clock module circuit and the digital-to-analog conversion circuit. The output end of the differential current converter module circuit is connected to the voltage amplifier module circuit. The output end of the voltage amplifier module circuit is connected to the high-voltage amplifier module circuit. The output end of the high-voltage amplifier module circuit is connected to the power amplifier module circuit. The output end of the power amplifier module circuit is connected to the ultrasonic transducer.

5. The programmable multifunctional arbitrary waveform single-element ultrasonic excitation device according to claim 3, characterized in that: The chip models of the clock module circuit are AD9515 and CDCV304, and the chip model of the digital-to-analog conversion circuit is AD9106.

6. The programmable multifunctional arbitrary waveform single-element ultrasonic excitation device according to claim 4, characterized in that: The chip model of the differential current converter module is OPA695, the chip model of the voltage amplifier module is LM6171, and the high-voltage amplifier module includes a current buffer and a transformer group, among which the chip model of the current buffer is LMH6321.

7. The programmable multifunctional arbitrary waveform single-element ultrasonic excitation device according to claim 1, characterized in that: Also included is a power module circuit that powers the PC, control board, waveform generation board, and ultrasonic transducer.

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