High-precision phased array ultrasonic excitation device and multi-channel ultrasonic irradiator

Abstract

The utility model discloses a high-precision phased array ultrasonic excitation device and a multichannel ultrasonic irradiator, the ultrasonic excitation device comprises a signal generation module, an amplification module and a signal acquisition module, the signal input end of the signal generation module is used for being connected with a control bus, the signal output end of the signal generation module is connected with the amplification module, and the signal acquisition module is connected with the amplification module. The signal output end of the amplification module is used for being connected with an ultrasonic transducer, the signal input end of the signal acquisition module is used for being connected with a control bus, and the signal output end of the signal acquisition module is used for being connected with the ultrasonic transducer. The signal generator adopts a 16-channel design, each channel has an independent phase and amplitude control function, and high-performance isolation design is adopted between the channels to avoid mutual interference.

Description

Technical Field

[0001] The utility model discloses a multi-channel ultrasonic irradiator, in particular to a high-precision phased array ultrasonic excitation device and a multi-channel ultrasonic irradiator. Background Art

[0002] With the widespread application of ultrasonic technology in fields such as non-destructive testing, medical imaging, and communications, the requirements for ultrasonic control accuracy are becoming increasingly higher. Traditional ultrasonic excitation devices cannot achieve precise control of ultrasonic waves, limiting the application scope and performance of ultrasonic technology.

[0003] A multichannel ultrasonic irradiator (MUI) is a device used in medical, scientific, and industrial applications that utilizes the radiation properties of ultrasound to perform multi-channel material processing. MUIs operate by exploiting the mechanical vibrations and cavitation effects of ultrasound. When ultrasound propagates through a liquid, it generates high-frequency vibrations, creating localized areas of high and low pressure. These changes cause tiny bubbles in the liquid to form and burst, releasing significant amounts of energy, generating strong shear forces and temperature fluctuations, which in turn affect the physical and chemical properties of the material being treated. The typical operating process of a MUI involves setting parameters for a central controller via a host computer or screen operation. The central controller calculates the corresponding waveform parameters based on these parameters. A waveform generator then outputs precise, multi-channel waveforms, which are then amplified by a power amplifier. Finally, a transducer converts the electrical signals into ultrasonic signals for radiation output.

[0004] Traditional phased array excitation devices have limitations in control accuracy and response speed, making it difficult to meet the high-performance requirements of ultrasonic excitation devices. Therefore, a new control system is needed to improve the performance of phased array excitation devices. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned traditional phased array excitation device in the prior art, which has limitations in control accuracy and response speed and is difficult to meet the high performance requirements of ultrasonic excitation devices, the utility model provides a high-precision phased array ultrasonic excitation device, including a PC, a main control circuit board, a signal generating module, an amplifying module, a signal acquisition module and an ultrasonic phased array probe. The signal generator adopts a 16-channel design, and each channel has independent phase and amplitude control functions. A high-performance isolation design is adopted between channels to avoid mutual interference. At the same time, a signal acquisition module is used. The chip of the signal acquisition module is a dual-channel 16-bit analog-to-digital converter with a sampling frequency of 125MHz. The output signal is collected by the signal acquisition module, and the system error is calculated by the phase difference detection algorithm. The channel is phase compensated to achieve high-precision phase control. The switching between different channel data is switched using a multi-channel analog electronic switch.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a high-precision phased array ultrasonic excitation device, the ultrasonic excitation device includes a signal generating module, an amplifying module and a signal acquisition module, the signal input end of the signal generating module is used to connect to a control bus, the signal output end of the signal generating module is connected to the amplifying module, the signal output end of the amplifying module is used to connect to an ultrasonic transducer, the signal input end of the signal acquisition module is used to connect to the control bus, and the signal output end of the signal acquisition module is used to connect to an ultrasonic transducer.

[0007] A multi-channel ultrasonic irradiator includes a main control circuit board, one or more board cards and one or more ultrasonic phased array probes. The one or more board cards are respectively connected to the main control circuit board, each board card is connected to an ultrasonic phased array probe, and each board card is provided with a group of high-precision phased array ultrasonic excitation devices as described above.

[0008] The technical solution adopted by the utility model to solve its technical problems further includes:

[0009] The signal generating module comprises a clock module circuit and four-way digital-to-analog conversion circuits, and the clock module circuit is respectively connected to the clock signal terminals of the four-way digital-to-analog conversion circuits.

[0010] The clock module circuit includes a clock chip and a digital signal processor chip. The output end of the clock chip is connected to the signal input end of the digital signal processor chip. The four output interfaces of the digital signal processor chip are respectively connected to a digital-to-analog conversion circuit.

[0011] The clock end of the digital-to-analog conversion circuit is connected to a crystal oscillator circuit, and the output end of each digital-to-analog conversion circuit is connected to a four-way differential amplifier circuit.

[0012] The power supply end of the digital-analog conversion circuit is connected with a power filter circuit.

[0013] The ultrasonic excitation device further comprises a power module, the power module comprising a DC-DC power management chip, a +5V voltage stabilizing chip, a -5V voltage stabilizing chip and a +3.3V voltage stabilizing chip, the DC-DC power management chip being an XL6019E1 power management chip, the power management chip converting input power into +8V power and -8V power for power supply, the -8V power being input into the -5V voltage stabilizing chip to be converted into -5V power for power supply, the +8V power being input into the +5V voltage stabilizing chip to be converted into +5V power for power supply, and the +5V power being input into the +3.3V voltage stabilizing chip to be converted into +3.3V power for power supply.

[0014] The main control circuit board is connected with the board card through an RS-485 bus.

[0015] The main control circuit board comprises a communication interface and an FPGA, the communication interface being an RJ-45 network interface, the RJ-45 network interface being connected to an Ethernet PHY chip, and the Ethernet PHY chip being connected to the FPGA.

[0016] The utility model discloses the beneficial effect is: the utility model discloses through to control system design and change main control circuit board, signal generating module, amplification module, signal acquisition module and ultrasonic phased array probe configuration make sampling frequency increase, data transmission speed becomes fast, through control system algorithm compensation greatly improves the precision and response speed of phased array device.

[0017] The utility model will be further described in connection with the drawings and specific embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall circuit block diagram of the utility model.

[0019] Figure 2 It is the circuit block diagram of main control circuit board part in the utility model.

[0020] Figure 3 It is the schematic drawing of the connection relation of FPGA and PHY chip and network port in the utility model.

[0021] Figure 4This is a block diagram of the voltage and power amplifier circuit in this utility model.

[0022] Figure 5 This is the circuit principle diagram of the DA part in this utility model.

[0023] Figure 6 This is the circuit principle diagram of the first part of the differential amplifier in this utility model.

[0024] Figure 7 This is the circuit principle diagram of the second part of the differential amplifier in this utility model.

[0025] Figure 8 This is the circuit principle diagram of the power supply filtering part in this utility model.

[0026] Figure 9 This is the circuit principle diagram of the crystal oscillator part in this utility model.

[0027] Figure 10 This is the circuit principle diagram of the four-way voltage and power amplifier module in this utility model.

[0028] Figure 11 This is the circuit schematic diagram of the first part of the power module in this utility model.

[0029] Figure 12 This is the circuit schematic diagram of the second part of the power module in this utility model.

[0030] Figure 13 This is the circuit schematic diagram of the third part of the power module in this utility model.

[0031] Figure 14 This is the circuit schematic diagram of the fourth part of the power module in this utility model.

[0032] Figure 15 This is a partial circuit schematic diagram of the clock module in this utility model. DETAILED DESCRIPTION

[0033] This embodiment is a preferred implementation of the present utility model. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the present utility model.

[0034] Please refer to the attached Figure 1 To the attached Figure 15The utility model mainly protects a high-precision phased array ultrasonic excitation device. The ultrasonic excitation device includes a signal generating module, an amplifying module and a signal collecting module. The signal input end of the signal generating module is used to connect to the control bus, the signal output end of the signal generating module is connected to the amplifying module, the signal output end of the amplifying module is used to connect to the ultrasonic transducer, the amplifying module is used to amplify the voltage and power, the signal input end of the signal collecting module is used to connect to the control bus, and the signal output end of the signal collecting module is used to connect to the ultrasonic transducer. In this embodiment, the signal generating module generates the corresponding output signal using DDS technology, and its waveform, frequency, phase, amplitude, number of cycles and each time it is emitted are all connected. Parameters such as the interval time of the transmission can be adjusted. The voltage and power amplifier module amplifies the output signal of the signal generation module and then stimulates the ultrasonic transducer to work. The signal acquisition module collects the output signal of the signal generation module and transmits it to the main control circuit board for phase synchronization. The ultrasonic transducer can use an ultrasonic phased array probe. The ultrasonic phased array probe outputs ultrasonic waves of a specific frequency through the voltage and power amplifier board. The system has the function of phase difference detection and compensation. After sampling the output signal, the random phase error between channels is calculated. The phase control word is adjusted to ensure the precise control of the phase of each channel of the phased array system. Each signal generation module can output eight signals, and the number of channels can be expanded by adding signal generation modules.

[0035] In this embodiment, the signal generation module includes a clock module circuit and four digital-to-analog conversion circuits. The clock module circuit is connected to the clock signal terminals of the four digital-to-analog conversion circuits to provide clock signals. The clock module circuit includes a clock chip and a digital signal processor chip. The clock chip uses the AD9515 clock chip, a dual-output clock distribution IC chip with delay adjustment function. The clock module circuit also includes a digital signal processor, which uses the CDCV304 digital signal processor chip. The CDCV304 uses a 3.3V supply voltage, has a bandwidth of 200MHz, and has four output interfaces with an output clock jitter of less than 100ps. The four output interfaces of the digital signal processor are respectively connected to one digital-to-analog conversion circuit. In this embodiment, the chip model of the digital-to-analog conversion circuit is AD9106. When powered by 3.3V and operating at a full rate of 180MSPS, the chip has a maximum power consumption of only 315mW. It also integrates an on-chip pattern memory with a capacity of 4096×12 bits. Combined with the control of the chip control register, it can generate complex waveforms. The clock terminal of the digital-to-analog conversion circuit is connected to a crystal oscillator circuit to provide a clock signal to the digital-to-analog conversion circuit. The output terminal of the digital-to-analog conversion circuit is connected to a differential amplifier circuit, which uses an AD8130 differential amplifier. In this embodiment, the output terminal of each digital-to-analog conversion circuit is connected to four differential amplifier circuits, which can amplify four signals. The signal generation module includes four digital-to-analog conversion circuits and can simultaneously process sixteen signals.

[0036] In this embodiment, a power supply filter circuit is connected to the power supply end of the digital-to-analog conversion circuit, which can filter the power supply of the digital-to-analog conversion circuit to make the power supply more stable.

[0037] In this embodiment, the ultrasonic excitation device is further provided with a power module for power supply. The power module includes a DC-DC power management chip, a +5V voltage regulator chip, a -5V voltage regulator chip, and a +3.3V voltage regulator chip. The DC-DC power management chip is an XL6019E1 power management chip. It uses a +12V power supply, which is converted to +8V and -8V power by the power management chip. The -8V power is fed into a -5V voltage regulator chip, which converts it into a -5V power supply. The +8V power is fed into a +5V voltage regulator chip, which converts it into a +5V power supply. The +5V power is fed into a +3.3V voltage regulator chip, which converts it into a +3.3V power supply. Each chip can employ a corresponding power regulator chip commonly used in the prior art.

[0038] In this embodiment, the amplitude and power of the signal generated by the signal generating circuit, that is, the signal generating module in this embodiment, are not sufficient to drive the ultrasonic transducer to work normally, and in order to achieve the effect of acoustic biological assembly, the voltage signal needs to be a continuous wave, so the amplification module needs to have the ability to continuously work at high voltage. The differential current signal output by the signal generating module is first converted into a voltage signal by a differential current converter, and then the small voltage signal is amplified to 24Vpp by a voltage amplifier. The voltage signal is further amplified by the high-voltage amplification module, and the maximum output can be 96Vpp. Finally, the signal is power-amplified by the power amplification module to drive the ultrasonic transducer. The differential current converter, voltage amplifier and high-voltage amplification module in the present utility model adopt conventional modules in the prior art. The present utility model does not make any innovations in its circuit structure. It can adopt the circuit of a conventional ultrasonic irradiator in the prior art.

[0039] In this embodiment, the signal acquisition module is linked to the main control circuit board, the signal input end of the signal acquisition module is connected to the output end of the differential current amplifier in the amplification module, and the output end of the signal acquisition module is connected to the FPGA on the main control circuit board. The signal acquisition module uses a chip model AD9268. The AD9268 chip is a dual-channel 16-bit analog-to-digital converter with a sampling frequency of 125MHz. The output signal of the main control circuit board is collected by the signal acquisition module, and the system error is calculated through the phase difference detection algorithm, and the channel is phase compensated to achieve high-precision phase control. Switching between different channel data is performed using a multi-channel analog electronic switch.

[0040] The present invention also protects a multi-channel ultrasonic irradiator, which mainly includes a main control circuit board, one or more boards, and one or more ultrasonic phased array probes. The one or more boards are respectively connected to the main control circuit board, each board is connected to an ultrasonic phased array probe, and each board is provided with a set of high-precision phased array ultrasonic excitation devices as described above. In this embodiment, four boards are used as an example for explanation. During specific implementation, specific settings can also be made according to actual needs. When the present invention is used, it is used in conjunction with a PC as a host computer. The PC can be a desktop computer or a laptop computer, or other equipment with data processing capabilities. The PC is connected to the main control circuit board via a Gigabit Ethernet interface, and the waveform parameters of each channel are sent to the main control circuit board.

[0041] In this embodiment, the main control circuit board is connected to the board through the RS-485 bus. The main control circuit board analyzes the parameter information and distributes it to the signal generation module through the RS-485 bus.

[0042] In this embodiment, the circuit structure of the main control circuit board mainly includes a communication interface and an FPGA, wherein the FPGA can adopt an FPGA of model XC7A35T, the communication interface adopts an RJ-45 network interface, the RJ-45 network interface is connected to the Ethernet PHY chip, and the Ethernet PHY chip adopts an Ethernet chip of model RTL8211. During specific implementation, other models of Ethernet chips can also be selected according to actual needs, and the Ethernet PHY chip is connected to the FPGA. The FPGA's internal programs include a data communication module, a control program module for the signal generation module, and a control program for the phase synchronization module. The data communication module inside the FPGA is connected to the communication interface outside the FPGA. The communication interface uses a Gigabit Ethernet communication interface module. The Ethernet communication interface uses the RTL8211 chip model. One side of the RTL8211 is connected to the FPGA, and the other side is connected to the RJ45 network port. It is connected to the PC through the RJ-45 interface for data communication. The RTL8211 is a three-speed adaptive Ethernet transceiver chip that provides MAC connections 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.

[0043] The FPGA's internal code creates a signal generation module control module and a phase synchronization module linked to the signal generation module. The signal generation module control module's input is connected to a PC, and its output is connected to the signal generation module for waveform transmission. The phase synchronization module's input is connected to the signal acquisition module, and its output is connected to a PC for calculating phase differences and performing phase compensation.

[0044] The principle of the multi-channel ultrasonic irradiator in this utility model is to set parameters for the main control circuit board through a host computer or screen operation. The main control circuit board calculates the corresponding waveform parameters based on these parameters. The signal generation module then outputs precise multi-channel waveforms. Each waveform is then amplified by a power amplifier. Finally, the transducer converts the electrical signal into an ultrasonic signal for radiation output. A PC serves as the host computer, and comprehensive system control and monitoring is performed through software operation (unless a host computer is not configured). The FPGA control board receives information such as channel switch status, ultrasonic frequency, modulation frequency and duty cycle, phase control, and operating time from the central control board, and outputs a phase-modulated square wave signal. The board amplifies the square wave signal output by the FPGA control board to drive the external transducer, and simultaneously adjusts the signal amplification gain according to the power adjustment device.

[0045] In the embodiment, the power module is powered by 12V DC power supply, and is converted into the voltage required by each module by a voltage conversion chip to supply power to each part of the system. The power amplifier in the amplification module is directly powered by high-voltage alternating current mains. The voltage required by the FPGA in the main control circuit board is provided by LTM4643. The analog-to-digital converter used in the signal generation module is AD9106, which is powered by 3.3V. The clock distribution chip in the clock module is powered by 3.3V. The differential current amplifier OPA695 in the amplification module is powered by 5V power supply. The ±5V power supply required by the voltage amplification circuit in the amplification module is provided by TPS5430. The high-voltage amplification part in the amplification module requires ±12V voltage provided by XL6019.

[0046] The utility model discloses a control system design and change main control circuit board, signal generation module, amplification module, signal acquisition module and ultrasonic phased array probe configuration make sampling frequency increase, data transmission speed become fast, through control system algorithm compensation greatly improve the precision and response speed of phased array device. The utility model discloses can realize the following function: (1) the waveform of each channel is independently controlled, (2) the amplitude of each channel is independently controlled, (3) the frequency of each channel is independently controlled, (4) the phase of each channel is independently controlled, (5) the emission cycle of each channel is independently controlled, (6) the emission mode of each channel is independently controlled, (7) the emission sampling rate of each channel is independently controlled, (8) the waveform of each channel is independently displayed, (9) the scheme is saved and loaded.

Claims

1. A high-precision phased array ultrasonic excitation device, characterized by: The ultrasonic excitation device includes a signal generating module, an amplifying module and a signal acquisition module. The signal input end of the signal generating module is used to connect to the control bus, the signal output end of the signal generating module is connected to the amplifying module, the signal output end of the amplifying module is used to connect to the ultrasonic transducer, the signal input end of the signal acquisition module is used to connect to the control bus, and the signal output end of the signal acquisition module is used to connect to the ultrasonic transducer.

2. The high-precision phased array ultrasonic excitation device according to claim 1, characterized in that: The signal generating module comprises a clock module circuit and four-way digital-to-analog conversion circuits, and the clock module circuit is respectively connected to the clock signal terminals of the four-way digital-to-analog conversion circuits.

3. The high-precision phased array ultrasonic excitation device according to claim 2, characterized in that: The clock module circuit includes a clock chip and a digital signal processor chip. The output end of the clock chip is connected to the signal input end of the digital signal processor chip. The four output interfaces of the digital signal processor chip are respectively connected to a digital-to-analog conversion circuit.

4. The high-precision phased array ultrasonic excitation device according to claim 2, characterized in that: The clock end of the digital-to-analog conversion circuit is connected to a crystal oscillator circuit, and the output end of each digital-to-analog conversion circuit is connected to a four-way differential amplifier circuit.

5. The high-precision phased array ultrasonic excitation device according to claim 2, characterized in that: The power supply end of the digital-to-analog conversion circuit is connected to a power supply filter circuit.

6. The high-precision phased array ultrasonic excitation device according to claim 1, characterized in that: The ultrasonic excitation device is also provided with a power supply module, which includes a DC-DC power management chip, a +5V voltage regulator chip, a -5V voltage regulator chip, and a +3.3V voltage regulator chip. The DC-DC power management chip adopts a power management chip with model XL6019E1. The power management chip converts the input power into +8V power and -8V power for power supply. The -8V power inputs the -5V voltage regulator chip and converts it into -5V power for power supply. The +8V power inputs the +5V voltage regulator chip and converts it into +5V power for power supply. The +5V power inputs the +3.3V voltage regulator chip and converts it into +3.3V power for power supply.

7. A multi-channel ultrasonic irradiator, characterized by: The ultrasonic irradiator includes a main control circuit board, one or more board cards and one or more ultrasonic phased array probes. The one or more board cards are respectively connected to the main control circuit board, each board card is connected to an ultrasonic phased array probe, and each board card is provided with a group of high-precision phased array ultrasonic excitation devices as described in any one of claims 1 to 6.

8. The multi-channel ultrasonic irradiator according to claim 7, characterized in that: The main control circuit board is connected to the board card via the RS-485 bus.

9. The multi-channel ultrasonic irradiator according to claim 7, characterized in that: The main control circuit board includes a communication interface and FPGA. The communication interface adopts an RJ-45 network interface. The RJ-45 network interface is connected to an Ethernet PHY chip, and the Ethernet PHY chip is connected to the FPGA.

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