A multi-channel ultrasonic emission device

Abstract

The present invention discloses a multi-channel ultrasonic emission device, which includes a control center module, a multi-channel control module, a plurality of programmable power amplification modules, a plurality of ultrasonic probes, and a human-computer interaction module. The control center module includes a core control unit and a data storage unit; the human-computer interaction module is responsible for displaying working parameters and working status and setting configuration parameters; the multi-channel control module includes a shared DDS pulse unit and a multi-channel management unit, and the shared DDS pulse unit only works in the same-frequency mode; each programmable power amplification module includes a programmable power amplifier unit, a power detection unit, and an independent DDS pulse unit, and the independent DDS pulse unit only works in the difference-frequency mode. The present invention can adapt to ultrasonic probes with different parameters, can control all ultrasonic probes to output the same and constant ultrasonic intensity simultaneously; at the same time, it can also work in the same-frequency mode and the difference-frequency mode, and supports multiple ultrasonic probes with different frequencies to work simultaneously.

Description

Technical Field

[0001] The present invention belongs to the technical field of ultrasonic treatment devices, and particularly relates to a multi-channel ultrasonic emission device for ultrasonic treatment. Background Art

[0002] Although there are ultrasonic emission devices on the market that can be connected to multiple ultrasonic probes currently, usually only one ultrasonic probe is supported to work at the same time. For scenarios that require large-scale ultrasonic radiation treatment, there is a significant problem of low treatment efficiency. Although such devices can be easily modified to allow multiple ultrasonic probes to work simultaneously, due to the setting method of ultrasonic intensity, when the consistency of ultrasonic probes is not high, or ultrasonic probes with different parameters work simultaneously, or affected by the accuracy of different components, there will be a problem that the actual ultrasonic intensities emitted by different ultrasonic probes are inconsistent, which will lead to differences in the treatment effects of the treatment areas of different ultrasonic probes. Controlling the consistency of ultrasonic probes is a difficult problem to solve in actual production, and the usual process can only control the accuracy within about twenty percent, which obviously cannot meet the scenarios with high requirements for ultrasonic intensity accuracy.

[0003] In addition, such devices usually only support ultrasonic probes working at the same time to use the same working frequency, which greatly limits their usability in the face of different ultrasonic frequency requirements and cannot meet the requirements of using different frequencies of ultrasonic waves for simultaneous irradiation for differential frequency treatment in clinical practice. Moreover, restricted by the production process and cost of ultrasonic transducers, the types of ultrasonic probe models supported by the same device are limited, and the applicable working frequencies are limited. In most cases, only a few transducers with fixed frequencies can be driven, and it is difficult to meet more application scenarios with different working frequencies. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-channel ultrasonic emission device, which can adapt to ultrasonic probes with different parameters and can control all ultrasonic probes to output the same and constant ultrasonic intensity simultaneously; at the same time, the device can also work in the same-frequency mode and the differential-frequency mode, and supports multiple ultrasonic probes with different frequencies to work simultaneously.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a multi-channel ultrasonic emission device, which includes a control center module, a multi-channel control module, a plurality of programmable power amplification modules, a plurality of ultrasonic probes, and a human-computer interaction module. The control center module is connected to the multi-channel control module and the human-computer interaction module. The multi-channel control module is connected to the plurality of programmable power amplification modules. The plurality of programmable power amplification modules are connected to the plurality of ultrasonic probes in one-to-one correspondence; wherein:

[0006] The control center module includes a core control unit and a data storage unit. The core control unit is responsible for the process control of the entire device, and the data storage unit is responsible for storing treatment-related log data.

[0007] The human-computer interaction module is responsible for displaying the working parameters and working status of the device, receiving the configuration parameters set by the user, and transmitting the configuration parameters to the control center module;

[0008] The multi-channel control module includes a shared DDS pulse unit and a multi-channel management unit. The shared DDS pulse unit works only in the same frequency mode. The shared DDS pulse unit works according to the PRF parameters, the number of continuous pulses, and the working frequency f of the ultrasonic probe set by the control center module. n , generating a driving waveform corresponding to the frequency f and the duty cycle D, and transmitting the driving waveform to all programmable power amplifier modules; the multi-channel management unit is responsible for transmitting the sound intensity parameters set by the control center module to the designated programmable power amplifier module, and controlling the opening and closing of the corresponding programmable power amplifier module according to the channel selection parameters and treatment time parameters of the control center module;

[0009] Among the multiple programmable power amplifier modules, each programmable power amplifier module includes a programmable power amplifier unit, a power detection unit and an independent DDS pulse unit. The independent DDS pulse unit will only work in the difference frequency mode. It can generate a driving waveform with corresponding frequency and duty cycle according to the PRF parameters, the number of continuous pulses and the working frequency of the ultrasonic probe set by the control center module, and transmit the driving waveform to the programmable power amplifier unit. The programmable power amplifier unit performs power amplification on the driving waveform generated by the common DDS pulse unit or the independent DDS pulse unit to generate a high-voltage pulse signal, and transmits the high-voltage pulse signal to the ultrasonic probe.

[0010] Furthermore, the configuration parameters include sound intensity parameters, number of continuous pulses, PRF parameters, treatment time parameters, channel selection parameters, and frequency modes, and the frequency modes include same-frequency mode and difference-frequency mode.

[0011] Furthermore, if the same frequency mode is required, the operating frequencies of the multiple ultrasound probes selected by the channel selection parameters need to be in the same frequency band. At this time, the operating frequency of the ultrasound probe is set to the average value of the operating frequencies stored inside all ultrasound probes;

[0012] If the difference frequency mode is required, the operating frequencies of the multiple ultrasound probes selected by the channel selection parameters need to be in different frequency bands. At this time, the operating frequency of each ultrasound probe is set to the operating frequency stored inside the ultrasound probe.

[0013] Furthermore, the generated corresponding frequency f and duty cycle D are calculated by the following formulas:

[0014]

[0015] Among them, n is the number of connected ultrasonic probes;

[0016]

[0017] Furthermore, the programmable power amplifier unit amplifies the driving waveform generated by the shared DDS pulse unit or the independent DDS pulse unit to generate a high-voltage pulse signal, and transmits the high-voltage pulse signal to the ultrasonic probe; among them, when the frequency mode is the same-frequency mode, the programmable power amplifier unit selects to amplify the waveform generated by the shared DDS pulse unit; when the frequency mode is the difference-frequency mode, the programmable power amplifier unit selects to amplify the waveform generated by the independent DDS pulse unit.

[0018] Even further, the power amplification to generate the high-voltage pulse signal includes the following steps:

[0019] (1) The programmable power amplifier unit calculates the required set sound power according to the sound intensity parameter and the effective radiation area of the ultrasonic probe;

[0020] (2) Further calculates the required set electric power according to the sound power and the electro-acoustic efficiency coefficient;

[0021] (3) Further calculates the set voltage of the required high-voltage pulse signal according to the electric power and the impedance of the ultrasonic probe.

[0022] Even further, the voltage amplitude U of the high-voltage pulse signal is calculated according to the sound intensity parameter I, the impedance R n , the electro-acoustic efficiency coefficient k n and the effective radiation area A n The calculation formula is as follows:

[0023]

[0024] Furthermore, the power detection unit detects the actual voltage, actual current, and the phase between the voltage and current applied to the ultrasonic probe, and transmits the detected data to the programmable power amplifier unit, and the programmable power amplifier unit calibrates the power amplification according to the data.

[0025] Even further, the power amplification calibration includes the following steps:

[0026] (1) Calculate the actual electric power according to the actual voltage, actual current, and the phase between the voltage and current;

[0027] (2) Compare the actual electric power with the set electric power. When the actual electric power is on the low side, increase the set electric power by the step threshold; when the actual electric power is on the high side, decrease the set electric power by the step threshold, and the step threshold is set by the system.

[0028] (3) Execute steps (1) and (2) multiple times until the difference between the actual electric power and the set electric power is less than the control accuracy.

[0029] Furthermore, the ultrasonic probe includes an ultrasonic transducer, a probe memory, and a temperature sensor. The ultrasonic transducer converts a high-voltage pulse signal into an ultrasonic wave signal to achieve the irradiation and emission of ultrasonic waves. The probe memory is used to store the relevant information of the ultrasonic transducer, including the operating frequency, impedance, electroacoustic efficiency coefficient, and effective radiation area of the ultrasonic transducer. The temperature sensor is used to detect the temperature of the ultrasonic transducer. When the temperature exceeds the set threshold, the control center module stops the emission of ultrasonic waves and issues a warning to the user through the human-machine interaction module.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention realizes a multi-channel ultrasonic emission device, which can be connected to multiple ultrasonic probes with different parameters, thereby reducing the requirements for the processing consistency of ultrasonic probes and being more conducive to production. For ultrasonic probes with different parameters, this device can control them to emit the same sound intensity and can maintain the stability of the output ultrasonic sound intensity, thereby realizing precise and highly consistent control of the ultrasonic treatment dose. This device can work in both the same-frequency mode and the difference-frequency mode. Using the difference-frequency mode can achieve the irradiation of more frequency ultrasonic waves and improve the applicability of ultrasonic treatment in different scenarios. Description of the Drawings

[0031] Figure 1 is the architecture diagram of an embodiment of the present invention;

[0032] Figure 2 is the partial structural schematic diagram of an embodiment of the present invention. Detailed Embodiments

[0033] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0034] As Figure 1 shown, the architecture schematic diagram of an embodiment of the present invention is shown, including a control center module, a multi-channel control module, N programmable power amplification modules, N ultrasonic probes, and a human-machine interaction module.

[0035] As Figure 2 shown, the partial design diagram of the Figure 1 shown embodiment is shown. In this embodiment, N = 10.

[0036] Refer toFigure 1 and Figure 2 The control center module and the multi-channel control module are connected through USART. The multi-channel control module and all programmable power amplification modules are connected through USART. Each programmable power amplification module can be respectively connected to one ultrasonic probe through I2C and the transmission signal line.

[0037] The control center module includes a core control unit and a data storage unit. The core control unit includes a processor chip, which is responsible for the process control of the entire device. The data storage unit is a FLASH storage chip, which is responsible for storing the log data related to the treatment.

[0038] The human-computer interaction module includes a display with touch function, a keyboard, and an indicator light, which are used to display the working parameters and working status of the device of the present invention, receive the configuration parameters set by the user, and transmit the configuration parameters to the control center module. The configuration parameters include the sound intensity parameter I, the continuous pulse number M, the PRF parameter F, the treatment time parameter t, the channel selection parameter, and the frequency mode. The frequency mode includes the same-frequency mode and the difference-frequency mode.

[0039] The multi-channel control module includes a shared DDS pulse unit and a multi-channel management unit. The shared DDS pulse unit includes a processor chip and a DDS waveform generator chip, which can generate a driving waveform corresponding to the frequency f and the duty cycle D according to the set PRF parameter, the continuous pulse number, and the working frequency f of the ultrasonic probe n , and transmit the driving waveform to all programmable power amplification modules. The corresponding frequency and duty cycle are calculated by formulas (1) and (2) respectively:

[0040]

[0041] where n is the number of connected ultrasonic probes;

[0042]

[0043] Only when the same-frequency mode is working, the shared DDS pulse unit works.

[0044] The multi-channel management unit includes a processor, which is responsible for transmitting the sound intensity parameter set by the control center module to the selected programmable power amplification module, and controlling the opening and closing of the corresponding programmable power amplification module according to the channel selection parameter and the treatment time parameter of the control center module.

[0045] The programmable power amplification module includes a programmable power amplifier unit, a power detection unit, and an independent DDS pulse unit. The independent DDS pulse unit can generate a driving waveform with corresponding frequency, number of pulses, and duty cycle according to the set PRF parameter and the operating frequency of the ultrasonic probe, and transmit the driving waveform to the programmable power amplifier unit. The independent DDS pulse unit only works when the difference frequency mode is in operation, and the corresponding frequency is the same as the operating frequency of the ultrasonic probe. The duty cycle is calculated by formula (2).

[0046] The programmable power amplifier unit amplifies the power of the driving waveform generated by the shared DDS pulse unit or the independent DDS pulse unit to generate a high-voltage pulse signal, and transmits the high-voltage pulse signal to the ultrasonic probe. The voltage amplitude U of the high-voltage pulse signal is based on the acoustic intensity parameter, the impedance R of different ultrasonic probes n , the electro-acoustic efficiency coefficient k n , and the effective radiation area A n and is calculated by formula (3). When the same frequency mode is in operation, the programmable power amplifier unit selects to amplify the waveform generated by the shared DDS pulse unit. When the difference frequency mode is in operation, the programmable power amplifier unit selects to amplify the waveform generated by the independent DDS pulse unit.

[0047]

[0048] The power detection unit detects the actual voltage, actual current, and the phase between the voltage and current applied to the ultrasonic probe, and transmits the detected data to the programmable power amplifier unit. The programmable power amplifier unit calibrates the power amplification according to the detected data, so as to ensure a constant acoustic intensity output by the ultrasonic probe. The power amplification calibration includes the following steps:

[0049] 1) Calculate the actual electric power according to the actual voltage, actual current, and the phase between the voltage and current;

[0050] 2) Compare the actual electric power with the set electric power. When the actual electric power is on the low side, increase the set electric power by the step threshold. When the actual electric power is on the high side, decrease the set electric power by the step threshold. In this embodiment, the step threshold is set to 1% of the set electric power.

[0051] 3) Execute steps 1) and 2) multiple times until the difference between the actual electric power and the set electric power is less than the control accuracy.

[0052] The ultrasonic probe includes an ultrasonic transducer, a probe memory, and a temperature sensor. The ultrasonic transducer converts a high-voltage pulse signal into an ultrasonic wave signal to achieve the irradiation and emission of ultrasonic waves. The probe memory is a FLASH chip and is used to store the parameter information of the ultrasonic transducer, including the operating frequency, impedance, electro-acoustic efficiency coefficient, and effective radiation area. The temperature sensor is a digital integrated temperature sensor and is used to detect the temperature of the ultrasonic transducer. When the temperature exceeds the set threshold of 42°C, the control center module stops the emission of ultrasonic waves and issues a warning to the user through the human-machine interaction module.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those of ordinary skill in the art should understand that the above embodiments do not limit the protection scope of the present invention in any form. Any technical solutions obtained by means of equivalent replacement and the like fall within the protection scope of the present invention.

[0054] Parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. A multi-channel ultrasonic transmitting device, characterized in that, it includes a control center module, a multi-channel control module, a plurality of programmable power amplification modules, a plurality of ultrasonic probes, and a human-computer interaction module. The control center module is connected to the multi-channel control module and the human-computer interaction module. The multi-channel control module is connected to the plurality of programmable power amplification modules. The plurality of programmable power amplification modules are connected to the plurality of ultrasonic probes in a one-to-one correspondence; wherein: The control center module includes a core control unit and a data storage unit. The core control unit is responsible for the process control of the entire device, and the data storage unit is responsible for storing log data related to treatment; The human-computer interaction module is responsible for displaying the working parameters and working status of the device, receiving the configuration parameters set by the user, and transmitting the configuration parameters to the control center module; The multi-channel control module includes a shared DDS pulse unit and a multi-channel management unit. The shared DDS pulse unit only works in the same-frequency mode. It generates a driving waveform with a corresponding frequency f and duty cycle D according to the PRF parameter, the number of continuous pulses, and the working frequency f of the ultrasonic probe set by the control center module, and transmits the driving waveform to all programmable power amplification modules. The multi-channel management unit is responsible for transmitting the sound intensity parameter set by the control center module to the designated programmable power amplification module, and controlling the on and off of the corresponding programmable power amplification module according to the channel selection parameter and treatment time parameter of the control center module. n , generates a driving waveform with a corresponding frequency f and duty cycle D, and transmits the driving waveform to all programmable power amplification modules; the multi-channel management unit is responsible for transmitting the sound intensity parameter set by the control center module to the designated programmable power amplification module, and controlling the on and off of the corresponding programmable power amplification module according to the channel selection parameter and treatment time parameter of the control center module; Among the plurality of programmable power amplification modules, each programmable power amplification module includes a programmable power amplifier unit, a power detection unit, and an independent DDS pulse unit. The independent DDS pulse unit only works in the heterodyne mode. It can generate a driving waveform with a corresponding frequency and duty cycle according to the PRF parameter, the number of continuous pulses, and the working frequency of the ultrasonic probe set by the control center module, and transmit the driving waveform to the programmable power amplifier unit. The programmable power amplifier unit amplifies the power of the driving waveform generated by the shared DDS pulse unit or the independent DDS pulse unit to generate a high-voltage pulse signal, and transmits the high-voltage pulse signal to the ultrasonic probe.

2. A multi-channel ultrasonic transmitting device according to claim 1, characterized in that, the configuration parameters include sound intensity parameters, the number of continuous pulses, PRF parameters, treatment time parameters, channel selection parameters, and frequency modes. The frequency modes include the same-frequency mode and the heterodyne mode.

3. A multi-channel ultrasonic transmitting device according to claim 1 or 2, characterized in that, if it needs to work in the same-frequency mode, the working frequencies of the multiple ultrasonic probes selected by the channel selection parameters need to be in the same frequency band. At this time, the working frequency of the ultrasonic probe is set to the average value of the working frequencies stored inside all ultrasonic probes; if it needs to work in the heterodyne mode, the working frequencies of the multiple ultrasonic probes selected by the channel selection parameters need to be in different frequency bands. At this time, the working frequency of each ultrasonic probe is set to the working frequency stored inside the ultrasonic probe.

4. A multi-channel ultrasonic transmitting device according to claim 1, characterized in that, the generated corresponding frequency f and duty cycle D are calculated by the following formulas respectively: , where n is the number of connected ultrasonic probes; , where fn is the operating frequency of the ultrasonic probe n; f is the corresponding frequency generated by the DDS pulse unit; D is the duty cycle of the driving waveform generated by the DDS pulse unit; M is the number of consecutive pulses in the configuration parameter; F is the PRF parameter in the configuration parameter.

5. A multi-channel ultrasonic transmitting device according to claim 1, characterized in that, the programmable power amplifier unit amplifies the power of the driving waveform generated by the shared DDS pulse unit or the independent DDS pulse unit to generate a high-voltage pulse signal, and transmits the high-voltage pulse signal to the ultrasonic probe; wherein, when the frequency mode is the same-frequency mode, the programmable power amplifier unit selects to amplify the waveform generated by the shared DDS pulse unit; when the frequency mode is the heterodyne mode, the programmable power amplifier unit selects to amplify the waveform generated by the independent DDS pulse unit.

6. A multi-channel ultrasonic transmitting device according to claim 5, characterized in that, the power amplification to generate a high-voltage pulse signal includes the following steps: (1) The programmable power amplifier unit calculates the required set sound power according to the sound intensity parameter and the effective radiation area of the ultrasonic probe; (2) Further calculates the required set electric power according to the sound power and the electro-acoustic efficiency coefficient; (3) Further calculates the set voltage of the required high-voltage pulse signal according to the electric power and the impedance of the ultrasonic probe.

7. A multi-channel ultrasonic transmitting device according to claim 5 or 6, characterized in that, The voltage amplitude U of the high-voltage pulse signal is calculated based on the sound intensity parameter I, the impedance R of different ultrasonic probes n , the electro-acoustic efficiency coefficient k n , and the effective radiation area A n The calculation formula is as follows: 。 8. A multi-channel ultrasonic transmitting device according to claim 1, characterized in that, the power detection unit detects the actual voltage, actual current, and phase between the voltage and current applied to the ultrasonic probe, and transmits the detected data to the programmable power amplifier unit, and the programmable power amplifier unit calibrates the power amplification according to the data.

9. A multi-channel ultrasonic transmitting device according to claim 8, characterized in that, the calibration of the power amplification includes the following steps: (1) Calculate the actual electric power according to the actual voltage, actual current, and phase between the voltage and current; (2) Compare the actual electric power with the set electric power. When the actual electric power is too low, increase the set electric power by the step threshold; when the actual electric power is too high, decrease the set electric power by the step threshold, and the step threshold is set by the system; (3) Execute steps (1) and (2) multiple times until the difference between the actual electric power and the set electric power is less than the control accuracy.

10. A multi-channel ultrasonic transmitting device according to claim 1, characterized in that, the ultrasonic probe includes an ultrasonic transducer, a probe memory, and a temperature sensor. The ultrasonic transducer converts the high-voltage pulse signal into an ultrasonic wave signal to realize the irradiation and emission of ultrasonic waves. The probe memory is used to store the relevant information of the ultrasonic transducer. The temperature sensor is used to detect the temperature of the ultrasonic transducer. When the temperature exceeds the set threshold, the control center module stops the emission of ultrasonic waves and issues a warning to the user through the human-machine interaction module.

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