Handheld radio frequency generator and radio frequency ablation control system
By redesigning the DC-AC conversion circuit of the radio frequency ablation device and abolishing the DC-DC conversion circuit, the miniaturization design of the radio frequency ablation device is realized, solving the problem of the lack of portability of the equipment and improving the portability and applicability of the equipment.
Patent Information
- Application Number
- CN202420608045.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing RF ablation equipment has large volumes of transformers and resonant inductors, and the large number of transformer circuit components, so it cannot be directly used in miniaturized designs and lacks portability.
A handheld RF generator was designed. By redesigning the resonant inductor and transformer in the DC-AC conversion circuit, the original DC-DC conversion circuit was cancelled, and the transformation from a desktop device to a handheld device was realized to improve portability.
The miniaturized design of radio frequency ablation equipment is realized, which avoids heat dissipation problems, reduces costs, and improves the portability of the equipment. It is suitable for the treatment goal of using radio frequency power less than 50W.
Smart Images
Figure CN222584630U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of medical equipment, and in particular relates to a handheld radio frequency generator and a radio frequency ablation control system. Background Art
[0002] Most of the existing radio frequency equipment is large-scale machinery and equipment. The DC-DC and DC-AC conversion circuits used in radio frequency ablation equipment contain large-volume transformers and resonant inductors, and the conversion circuits have a large number of components. The DC-DC and DC-AC conversion circuits used in existing radio frequency ablation equipment contain large-volume transformers and resonant inductors, and the conversion circuits have a large number of components, which cannot be directly used for miniaturized design and lack portability. Utility Model Content
[0003] The technical purpose of the utility model is to provide a handheld radio frequency generator and a radio frequency ablation control system, and the resonant inductor and transformer in the DC-AC conversion circuit are redesigned: the original DC-DC conversion circuit is cancelled, and the conversion from a desktop device to a handheld device is realized, thereby improving portability.
[0004] To solve the above problems, the technical solution of the utility model is:
[0005] The utility model provides a handheld radio frequency generator, including a control module, a DC-AC module, an LDO voltage conversion module, a high frequency driving module and a data sampling module.
[0006] The input end of the LDO voltage conversion module is connected to the power supply module to convert it into a DC voltage, the output end of the LDO voltage conversion module is connected to the input end of the control module, an output end of the control module is connected to the input end of the high-frequency driving module to provide two complementary square wave signals with adjustable duty cycle, the output end of the high-frequency driving module is connected to the input end of the DC-AC module, the output end of the DC-AC module is connected to the neural capacitor to output energy to the electrode, and the output energy is connected to the input end of the data sampling module, the output end of the data sampling module is connected to another output end of the control module, and is used to collect temperature signals, voltage signals and current signals and feed them back to the control module, and after data analysis and processing, a control signal is sent through the high-frequency driving module to make the high-frequency driving module work normally, and drive the DC-AC module to output energy to the electrode;
[0007] The DC-AC module includes a half-bridge circuit, a resonant circuit and a transformer U3. The input end of the half-bridge circuit is connected to the high-frequency driving module to provide drive to the DC-AC module. The output end of the half-bridge circuit is connected to the input end of the resonant circuit. The input end of the resonant circuit is connected to the transformer U3.
[0008] Preferably, the half-bridge circuit includes a first MOS tube Q7, a second MOS tube Q8, a first voltage regulator diode D19, a first resistor R109, a second resistor R156, a second voltage regulator diode D1, a third resistor R1 and a fourth resistor R157, one end of the first resistor R109 is connected to the signal end of the high-frequency driving module, the other end of the first resistor R109 is connected to the G pole of the first MOS tube Q7, the D pole of the first MOS tube Q7 is connected to the power supply, and the S pole of the first MOS tube Q7 is connected to the D pole of the second MOS tube Q8. and grounded, and one end of the first resistor R109 is connected to the cathode of the first zener diode D19, the anode of the first zener diode D19 and the second resistor R156 are connected to the resonant circuit, the G pole of the second MOS tube Q8 is connected to one end of the third resistor R1, the other end of the third resistor R1 is connected to the signal end of the high-frequency driving module, and the other end of the third resistor R1 is connected to the cathode of the second zener diode D1, and the anode of the second zener diode D1 and the fourth resistor R157 are connected to the resonant circuit;
[0009] The resonant circuit includes a first capacitor C29, a second capacitor C31, a third capacitor C30, a fourth capacitor C7, a fifth capacitor C8 and a vertical inductor L14. The first capacitor C29, the second capacitor C31 and the vertical inductor L14 are connected in series in sequence, the third capacitor C30 is connected in parallel with the first capacitor C29, and the vertical inductor L14 is connected with the fourth capacitor C7 and the fifth capacitor C8 connected in parallel, one end of the fifth capacitor C8 is connected to the first port of the transformer U3, and the other end of the fifth capacitor C8 is connected to the fourth port of the transformer U3.
[0010] Preferably, it also includes a gear control module, which is connected to the control module. The gear control module includes a first relay K1, a second relay K2, a third relay K3 and a Darlington transistor U37. The 3B port of the Darlington transistor U37 is connected to the PA12 port of the single-chip computer U1, the 2B port of the Darlington transistor U37 is connected to the thirty-second port of the single-chip computer U1, the third port of the Darlington transistor U37 is connected to the thirty-first port of the single-chip computer U1, the E port of the Darlington transistor U37 is grounded, the COM port of the Darlington transistor U37 is connected to the power supply, the port of the Darlington transistor U37 is connected to the fifth port of the first relay K1, the seventh port of the Darlington transistor U37 is connected to the fifth port of the second relay K2, and the port of the Darlington transistor U37 is connected to the fifth port of the third relay K3, which is used to control the input voltage value of the power circuit board to improve the energy utilization efficiency under different power outputs.
[0011] Preferably, the high-frequency driving module includes a driving chip U30, the HIN port of the driving chip is connected to the PA8 port of the single-chip computer U1, the LIN port of the driving chip is connected to the PB13 port of the single-chip computer U1, and is used to provide two complementary 480kHz square wave signals with adjustable duty cycle, the HO port of the driving chip U30 is connected to the first input terminal Q3 of the DC-AC module, and the HO port of the driving chip U30 is connected to the second input terminal Q4 of the DC-AC module to drive the first MOS tube Q7 and the second MOS tube Q8.
[0012] Preferably, the data sampling module includes a voltage and current sampling module, which includes a voltage transformer L12, a current transformer L15 and an operational amplifier U35, collects voltage and current signals from the voltage transformer L12 and the current transformer L15, and transmits the DC signal to a follower composed of the operational amplifier U35 through a rectifier bridge composed of diodes.
[0013] Preferably, the data sampling module includes a temperature measurement module, which includes a thermocouple temperature measurement unit and a thermistor temperature measurement unit. The thermocouple temperature measurement unit adopts a thermocouple digital sensor U34, the fifth port of the thermocouple digital sensor U34 is connected to the fifteenth port of the single-chip computer U1, the seventh port of the thermocouple digital sensor U34 is connected to the sixteenth port of the single-chip computer U1, and the sixth port of the thermocouple digital sensor U34 is connected to the fourteenth port of the single-chip computer U1; the thermistor temperature measurement unit includes a fifth resistor R28, a sixth resistor R29, a sixth capacitor C1, a seventh resistor R11, an eighth resistor R159 and a seventh capacitor C19, one end of the fifth resistor R28 is connected to the eleventh port of the single-chip computer U1, and the fifth The other end of the resistor R28 is connected to the second pin of the first pin, and the other end of the fifth resistor R28 is connected to the sixth resistor R29 and connected to the power supply, the other end of the fifth resistor R28 is connected to one end of the sixth capacitor C1 and is grounded, and the other end of the sixth capacitor C1 is connected to the first pin of the first pin; one end of the seventh resistor R11 is connected to the twelfth port of the microcontroller U1, the other end of the seventh resistor R11 is connected to the second pin of the second pin, and the other end of the seventh resistor R11 is connected to the eighth resistor R159 and connected to the power supply, the other end of the seventh resistor R11 is connected to one end of the seventh capacitor C19 and is grounded, and the other end of the seventh capacitor C19 is connected to the first pin of the second pin, for over-temperature protection of internal components.
[0014] Preferably, the DC-AC module and the data sampling module are arranged on a power circuit board, the control module, the high-frequency driving module and the temperature measurement module are all arranged on a control circuit board, and the power circuit board and the control circuit board are a stacked structure arranged up and down.
[0015] Preferably, a peripheral module is also included, which includes a power switch, a gear shift and start button, and a gear / battery indicator digital tube. The power switch is connected to the power supply module and supplies power to the control module. The gear shift and start button inputs the start and stop of the control module through buttons, and the gear / battery indicator digital tube receives the output indication of the control module and displays the current working status.
[0016] Preferably, the transformer is an EE22 transformer.
[0017] The utility model also provides a radio frequency ablation control system, comprising the handheld radio frequency generator described in the embodiment of the utility model.
[0018] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art:
[0019] The handheld radio frequency generator and radio frequency ablation control system provided by the utility model redesign the resonant inductor and transformer in the DC-AC conversion circuit: the original DC-DC conversion circuit is cancelled, and the desktop device is transformed into a handheld device, thereby improving portability;
[0020] 1. Avoid heat dissipation problems: The original DC-DC conversion circuit is cancelled, unnecessary circuit structure is reduced, cost is reduced, large-volume devices are replaced, and a miniaturized design is carried out based on the desktop radiofrequency ablation equipment, which can be handheld and suitable for treatment targets with radiofrequency power less than 50W.
[0021] 2. Increased integration: In miniaturized devices, all components must be tightly integrated together, which may cause problems such as signal interference and electromagnetic compatibility.
[0022] 3. Save space and achieve ideal performance: In miniaturized equipment, a stacked structure is used to make full use of the space between the upper and lower components, saving space and avoiding the inability of components to achieve ideal performance due to space constraints. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those skilled in the art. The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.
[0024] Figure 1 This is a circuit diagram of a handheld radio frequency generator in an embodiment of the utility model;
[0025] Figure 2 This is a circuit diagram of a power supply module in an embodiment of the present utility model;
[0026] Figure 3 This is a circuit diagram of a gear control module in an embodiment of the present utility model;
[0027] Figure 4 This is a circuit diagram of a DC-AC module in an embodiment of the present utility model;
[0028] Figure 5 This is a circuit diagram of a voltage and current sampling module in an embodiment of the utility model;
[0029] Figure 6 This is a circuit diagram of a high-frequency driving module in an embodiment of the utility model;
[0030] Figure 7 This is a circuit diagram of a temperature measurement module in an embodiment of the present utility model;
[0031] Figure 8 This is a circuit diagram of a control module in an embodiment of the present utility model;
[0032] Fig. 9 This is a circuit diagram of a peripheral module in an embodiment of the utility model;
[0033] Fig.10 Schematic diagram of the working process in the embodiment of the present utility model. DETAILED DESCRIPTION
[0034] The following is an explanation of the implementation of the utility model by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the utility model. It should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation of the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, “plurality” means two or more.
[0035] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood by specific circumstances.
[0036] See also Figure 1As shown, the utility model provides a handheld radio frequency generator, which is suitable for treating targets using radio frequency power less than 50W, and includes a control module, a DC-AC module, an LDO voltage conversion module, a high-frequency driving module and a data sampling module. The input end of the LDO voltage conversion module is connected to the power supply module to convert it into a DC voltage, the output end of the LDO voltage conversion module is connected to the input end of the control module, an output end of the control module is connected to the input end of the high-frequency driving module to provide two complementary square wave signals with adjustable duty cycle, the output end of the high-frequency driving module is connected to the input end of the DC-AC module, the output end of the DC-AC module is connected to the neural capacitor to the electrode output energy, The output energy is connected to the input end of the data sampling module, and the output end of the data sampling module is connected to another output end of the control module, which is used to collect temperature signals, voltage signals and current signals and feed them back to the control module. After data analysis and processing, a control signal is sent through the high-frequency driving module to make the high-frequency driving module work normally, and drive the DC-AC module to output energy to the electrode; the DC-AC module includes a half-bridge circuit, a resonant circuit and a transformer U3. The input end of the half-bridge circuit is connected to the high-frequency driving module to provide drive to the DC-AC module, the output end of the half-bridge circuit is connected to the input end of the resonant circuit, and the input end of the resonant circuit is connected to the transformer U3. It can be understood that the data sampling module includes a voltage and current sampling module and a temperature measurement module. Preferably, the transformer adopts an EE22 type transformer, which is small in size and can meet the use under an output power of 50W. The large-volume transformer and resonant inductor in the DC-DC and DC-AC conversion circuits used in the desktop radiofrequency ablation equipment are miniaturized to provide portability of this embodiment.
[0037] In this embodiment, see Figure 2 As shown, the power supply module is powered by a 48V battery pack, which is the energy source for controlling the drive circuit and power output; in addition, an external 48V power supply can also be directly connected to power the device. The LDO voltage conversion module provides the required DC voltage, including +5V +12V +3.3V, which is used to power the control module, display module, and drive module;
[0038] See also Figure 3As shown, in this embodiment, the handheld radio frequency generator also includes a gear control module, which is connected to the control module. The gear control module includes a first relay K1, a second relay K2, a third relay K3 and a Darlington transistor U37. The 3B port of the Darlington transistor U37 is connected to the PA12 port of the single-chip microcomputer U1, the 2B port of the Darlington transistor U37 is connected to the thirty-second port of the single-chip microcomputer U1, the third port of the Darlington transistor U37 is connected to the thirty-first port of the single-chip microcomputer U1, the E port of the Darlington transistor U37 is grounded, the COM port of the Darlington transistor U37 is connected to the power supply, the port of the Darlington transistor U37 is connected to the fifth port of the first relay K1, the seventh port of the Darlington transistor U37 is connected to the fifth port of the second relay K2, and the port of the Darlington transistor U37 is connected to the fifth port of the third relay K3, which is used to control the input voltage value of the power circuit board to improve the energy utilization efficiency under different power outputs. It can be understood that the gear control module is composed of three relays K1, K2, and K3 and the U37 Darlington transistor, which is used to control the input voltage value of the power circuit board to improve energy utilization efficiency under different power outputs.
[0039] See also Figure 4 As shown, in one embodiment, the half-bridge circuit includes a first MOS tube Q7, a second MOS tube Q8, a first voltage regulator diode D19, a first resistor R109, a second resistor R156, a second voltage regulator diode D1, a third resistor R1 and a fourth resistor R157, one end of the first resistor R109 is connected to the signal end of the high-frequency driving module, the other end of the first resistor R109 is connected to the G pole of the first MOS tube Q7, the D pole of the first MOS tube Q7 is connected to the power supply, the S pole of the first MOS tube Q7 is connected to the D pole of the second MOS tube Q8 The first resistor R109 is connected to the negative electrode of the first voltage zener diode D19, the positive electrode of the first voltage zener diode D19 and the second resistor R156 are connected to the resonant circuit, the G electrode of the second MOS tube Q8 is connected to one end of the third resistor R1, the other end of the third resistor R1 is connected to the signal end of the high-frequency driving module, and the other end of the third resistor R1 is connected to the negative electrode of the second voltage zener diode D1, and the positive electrode of the second voltage zener diode D1 and the fourth resistor R157 are connected to the resonant circuit;
[0040] The resonant circuit includes a first capacitor C29, a second capacitor C31, a third capacitor C30, a fourth capacitor C7, a fifth capacitor C8 and a vertical inductor L14, wherein the first capacitor C29, the second capacitor C31 and the vertical inductor L14 are connected in series in sequence, the third capacitor C30 is connected in parallel with the first capacitor C29, and the vertical inductor L14 is connected with the fourth capacitor C7 and the fifth capacitor C8 connected in parallel, one end of the fifth capacitor C8 is connected to the first port of the transformer U3, and the other end of the fifth capacitor C8 is connected to the fourth port of the transformer U3. It can be understood that the DC-AC module includes a half-bridge circuit, a resonant circuit and a transformer U3. The half-bridge circuit is mainly composed of MOS tubes Q7 and Q8, and the resonant circuit is composed of LC, including L14, C7, C8, C29, C30, and C31.
[0041] See also Figure 5 As shown, in one embodiment, the data sampling module includes a voltage and current sampling module, and the voltage and current sampling module includes a voltage transformer L12, a current transformer L15 and an operational amplifier U35. The voltage and current signals are collected from the voltage transformer L12 and the current transformer L15, and the DC signal is transmitted to the follower composed of the operational amplifier U35 through a rectifier bridge composed of diodes. Finally, the control chip U1 collects the voltage and current signals for processing and analysis.
[0042] See also Figure 6 As shown, in one embodiment, the high-frequency driving module includes a driving chip U30, the HIN port of the driving chip is connected to the PA8 port of the single-chip microcomputer U1, the LIN end of the driving chip is connected to the PB13 port of the single-chip microcomputer U1, and is used to provide two complementary 480kHz square wave signals with adjustable duty cycle, the HO port of the driving chip U30 is connected to the first input terminal Q3 of the DC-AC module, and the HO port of the driving chip U30 is connected to the second input terminal Q4 of the DC-AC module to drive the first MOS tube Q7 and the second MOS tube Q8.
[0043] See also Figure 7As shown, in one embodiment, the data sampling module includes a temperature measurement module, and the temperature measurement module includes a thermocouple temperature measurement unit and a thermistor temperature measurement unit. The thermocouple temperature measurement unit adopts a thermocouple digital sensor U34, and the fifth port of the thermocouple digital sensor U34 is connected to the fifteenth port of the single-chip microcomputer U1, the seventh port of the thermocouple digital sensor U34 is connected to the sixteenth port of the single-chip microcomputer U1, and the sixth port of the thermocouple digital sensor U34 is connected to the fourteenth port of the single-chip microcomputer U1; wherein, the thermocouple digital sensor U34 adopted in the thermocouple temperature measurement part adopts Maxim MAX31855, K-type thermocouple, 14-bit 0.25°C resolution, adopts the temperature value of the electrode end, and is displayed on the digital tube through the control module, so that the operator can intuitively see the temperature changes during ablation. The thermistor temperature measuring unit includes a fifth resistor R28, a sixth resistor R29, a sixth capacitor C1, a seventh resistor R11, an eighth resistor R159 and a seventh capacitor C19, one end of the fifth resistor R28 is connected to the eleventh port of the single-chip microcomputer U1, the other end of the fifth resistor R28 is connected to the second pin of the first pin, and the other end of the fifth resistor R28 is connected to the sixth resistor R29 and connected to a power supply, the other end of the fifth resistor R28 is connected to one end of the sixth capacitor C1 and grounded, and the other end of the sixth capacitor C1 is connected to the first pin of the first pin; one end of the seventh resistor R11 is connected to the twelfth port of the single-chip microcomputer U1, the other end of the seventh resistor R11 is connected to the second pin of the second pin, and the other end of the seventh resistor R11 is connected to the eighth resistor R159 and connected to the power supply, the other end of the seventh resistor R11 is connected to one end of the seventh capacitor C19 and grounded, and the other end of the seventh capacitor C19 is connected to the first pin of the second pin, which is used for over-temperature protection of internal components. Thermistor temperature measurement uses a 100K B3950 thermistor, which is used to protect the internal components of the device from over-temperature.
[0044] See also Figure 8 As shown, the control module used in the handheld RF generator provided in this embodiment: the single-chip microcomputer U1 is responsible for the collection and processing of temperature, voltage, current and other signals, the communication and control of peripheral devices such as buttons, indicator lights, and digital tubes, and controls the normal operation of the high-frequency drive module. The handheld RF generator also includes a peripheral module for external operation and information interaction, and the peripheral module includes a power switch, a gear switching and start button, and a gear / power indicator digital tube. The power switch is connected to the power supply module and supplies power to the control module. The gear switching and start button input the control module to control the start and stop. The gear / power indicator digital tube receives the output indication of the control module and displays the current working status, see Fig. 9 shown.
[0045] In order to save circuit space and miniaturize the RF generator, the DC-AC module and the voltage and current sampling module are arranged on the power circuit board, the control module, the high-frequency drive module and the temperature measurement module are all arranged on the control circuit board, and the power circuit board and the control circuit board are stacked structures arranged up and down. It can be understood that the overall control circuit is composed of a control circuit board and a power circuit board, and the two boards are stacked and fixed, and the final volume size is 80mm long * 40mm wide * 35mm high. The above-mentioned PCB layout is more compact, and a stacked structure is adopted to make full use of the space between the upper and lower components.
[0046] In this embodiment, the desktop plug-in type components are reselected as surface mount type, which has a higher unit volume density and a smaller volume. A small fan of 30mm*30mm*10mm is also used in the RF generator to ensure a smaller volume under the fan heat effect.
[0047] The principle of this implementation is that the entire device is divided into four parts: a power supply module such as a battery pack, external devices such as a button indicator light digital tube, a power circuit board, and a control circuit board. The battery pack powers each module of the device through an LDO voltage conversion module. The buttons of the external devices are used as inputs, and the input signals are sent to the MCU to control the start and stop of the device. The indicator light digital tubes of the external devices are used as output indications, and the output information is sent by the MCU to display the current working status of the device. The MCU in the control circuit board sends a driving signal that drives the DC-AC module in the power circuit board through the high-frequency driving module, and the device generates an output. The voltage and current sampling in the power circuit board and the thermocouple in the electrode are fed back to the MCU in the control circuit board, and the data is analyzed and processed to determine the current working status and treatment status of the device. See Fig.10 As shown, the control method of the handheld radio frequency generator provided in this embodiment includes the following steps: first, the system will perform a self-check to check whether each module is operating normally and confirm whether the start button is pressed. If it is pressed, the radio frequency output will be started. The temperature will become higher during radio frequency output. At the same time, the temperature information of the thermocouple, the voltage and current are collected. The temperature information of the thermocouple is compared with the set temperature. If it is less than the set temperature, the output continues. If it reaches the set temperature, the output stops, indicating that the ablation has achieved the expected effect. It is widely used clinically, such as hemorrhoid ablation, rhinitis ablation, and other scenarios using 480kHz, 50W or less radio frequency energy ablation. The existing desktop radio frequency generating equipment includes a DC-AC part and a DC-DC part, and has a large number of components, a large overall volume, and poor heat dissipation ability. It is suitable for scenes with higher power. The focus of this embodiment is to reduce the number of components, reduce the overall volume, concentrate the heat, and reduce the volume without losing the original radio frequency generating function. It is suitable for scenes with lower power.
[0048] Based on the same utility model concept, the present embodiment also provides a radiofrequency ablation control system, including a handheld radiofrequency generator as provided in the above embodiment, including a control module, a DC-AC module, an LDO voltage conversion module, a high-frequency driving module and a data sampling module, wherein the input end of the LDO voltage conversion module is connected to the power supply module to convert into a DC voltage, the output end of the LDO voltage conversion module is connected to the input end of the control module, an output end of the control module is connected to the input end of the high-frequency driving module to provide two complementary square wave signals with adjustable duty cycle, the output end of the high-frequency driving module is connected to the input end of the DC-AC module, and the output end of the DC-AC module is connected to the neural capacitor to the electrode. Output energy, connect the output energy to the input end of the data sampling module, the output end of the data sampling module is connected to another output end of the control module, for collecting temperature signals, voltage signals and current signals and feeding them back to the control module, and sending a control signal after data analysis and processing through the high-frequency driving module to make the high-frequency driving module work normally, and drive the DC-AC module to output energy to the electrode; the DC-AC module includes a half-bridge circuit, a resonant circuit and a transformer U3, the input end of the half-bridge circuit is connected to the high-frequency driving module to provide drive to the DC-AC module, the output end of the half-bridge circuit is connected to the input end of the resonant circuit, and the input end of the resonant circuit is connected to the transformer U3.
[0049] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.
Claims
1. A handheld radio frequency generator, characterized in that: Including control module, DC-AC module, LDO voltage conversion module, high-frequency drive module and data sampling module, The input end of the LDO voltage conversion module is connected to the power supply module to convert it into a DC voltage, the output end of the LDO voltage conversion module is connected to the input end of the control module, an output end of the control module is connected to the input end of the high-frequency driving module to provide two complementary square wave signals with adjustable duty cycle, the output end of the high-frequency driving module is connected to the input end of the DC-AC module, the output end of the DC-AC module is connected to the neural capacitor to output energy to the electrode, and the output energy is connected to the input end of the data sampling module, the output end of the data sampling module is connected to another output end of the control module, and is used to collect temperature signals, voltage signals and current signals and feed them back to the control module, and after data analysis and processing, a control signal is sent through the high-frequency driving module to make the high-frequency driving module work normally, and drive the DC-AC module to output energy to the electrode; The DC-AC module includes a half-bridge circuit, a resonant circuit and a transformer U3. The input end of the half-bridge circuit is connected to the high-frequency driving module to provide drive to the DC-AC module. The output end of the half-bridge circuit is connected to the input end of the resonant circuit. The input end of the resonant circuit is connected to the transformer U3.
2. The handheld radio frequency generator according to claim 1, characterized in that: The half-bridge circuit includes a first MOS transistor Q7, a second MOS transistor Q8, a first voltage regulator diode D19, a first resistor R109, a second resistor R156, a second voltage regulator diode D1, a third resistor R1 and a fourth resistor R157, one end of the first resistor R109 is connected to the signal end of the high-frequency driving module, the other end of the first resistor R109 is connected to the G pole of the first MOS transistor Q7, the D pole of the first MOS transistor Q7 is connected to the power supply, the S pole of the first MOS transistor Q7 is connected to the D pole of the second MOS transistor Q8 and is grounded , and one end of the first resistor R109 is connected to the cathode of the first voltage zener diode D19, the anode of the first voltage zener diode D19 and the second resistor R156 are connected to the resonant circuit, the G pole of the second MOS tube Q8 is connected to one end of the third resistor R1, the other end of the third resistor R1 is connected to the signal end of the high-frequency driving module, and the other end of the third resistor R1 is connected to the cathode of the second voltage zener diode D1, and the anode of the second voltage zener diode D1 and the fourth resistor R157 are connected to the resonant circuit; The resonant circuit includes a first capacitor C29, a second capacitor C31, a third capacitor C30, a fourth capacitor C7, a fifth capacitor C8 and a vertical inductor L14. The first capacitor C29, the second capacitor C31 and the vertical inductor L14 are connected in series in sequence, the third capacitor C30 is connected in parallel with the first capacitor C29, and the vertical inductor L14 is connected with the fourth capacitor C7 and the fifth capacitor C8 connected in parallel, one end of the fifth capacitor C8 is connected to the first port of the transformer U3, and the other end of the fifth capacitor C8 is connected to the fourth port of the transformer U3.
3. The handheld radio frequency generator according to claim 1, characterized in that: It also includes a gear control module, which is connected to the control module. The gear control module includes a first relay K1, a second relay K2, a third relay K3 and a Darlington transistor U37. The 3B port of the Darlington transistor U37 is connected to the PA12 port of the single-chip computer U1, the 2B port of the Darlington transistor U37 is connected to the thirty-second port of the single-chip computer U1, the third port of the Darlington transistor U37 is connected to the thirty-first port of the single-chip computer U1, the E port of the Darlington transistor U37 is grounded, the COM port of the Darlington transistor U37 is connected to the power supply, the port of the Darlington transistor U37 is connected to the fifth port of the first relay K1, the seventh port of the Darlington transistor U37 is connected to the fifth port of the second relay K2, and the port of the Darlington transistor U37 is connected to the fifth port of the third relay K3, which is used to control the input voltage value of the power circuit board to improve the energy utilization efficiency under different power outputs.
4. The handheld radio frequency generator according to claim 1, characterized in that: The high-frequency driving module includes a driving chip U30, the HIN port of the driving chip is connected to the PA8 port of the single-chip computer U1, the LIN port of the driving chip is connected to the PB13 port of the single-chip computer U1, and is used to provide two complementary 480kHz square wave signals with adjustable duty cycles, the HO port of the driving chip U30 is connected to the first input terminal Q3 of the DC-AC module, and the HO port of the driving chip U30 is connected to the second input terminal Q4 of the DC-AC module to drive the first MOS tube Q7 and the second MOS tube Q8.
5. The handheld radio frequency generator according to claim 1, characterized in that: The data sampling module includes a voltage and current sampling module, which includes a voltage transformer L12, a current transformer L15 and an operational amplifier U35. The voltage and current signals are collected from the voltage transformer L12 and the current transformer L15, and the DC signal is transmitted to the follower composed of the operational amplifier U35 through a rectifier bridge composed of diodes.
6. The handheld radio frequency generator according to claim 1, characterized in that: The data sampling module includes a temperature measurement module, and the temperature measurement module includes a thermocouple temperature measurement unit and a thermistor temperature measurement unit. The thermocouple temperature measurement unit adopts a thermocouple digital sensor U34. The fifth port of the thermocouple digital sensor U34 is connected to the fifteenth port of the single-chip computer U1, the seventh port of the thermocouple digital sensor U34 is connected to the sixteenth port of the single-chip computer U1, and the sixth port of the thermocouple digital sensor U34 is connected to the fourteenth port of the single-chip computer U1; the thermistor temperature measurement unit includes a fifth resistor R28, a sixth resistor R29, a sixth capacitor C1, a seventh resistor R11, an eighth resistor R159 and a seventh capacitor C19. One end of the fifth resistor R28 is connected to the eleventh port of the single-chip computer U1, and the fifth resistor R29 is connected to the sixteenth port of the single-chip computer U1. The other end of the fifth resistor R28 is connected to the second pin of the first pin, and the other end of the fifth resistor R28 is connected to the sixth resistor R29 and connected to the power supply, the other end of the fifth resistor R28 is connected to one end of the sixth capacitor C1 and is grounded, and the other end of the sixth capacitor C1 is connected to the first pin of the first pin; one end of the seventh resistor R11 is connected to the twelfth port of the single-chip microcomputer U1, the other end of the seventh resistor R11 is connected to the second pin of the second pin, and the other end of the seventh resistor R11 is connected to the eighth resistor R159 and connected to the power supply, the other end of the seventh resistor R11 is connected to one end of the seventh capacitor C19 and is grounded, and the other end of the seventh capacitor C19 is connected to the first pin of the second pin, for over-temperature protection of internal components.
7. The handheld radio frequency generator according to claim 1, characterized in that: The DC-AC module and the data sampling module are arranged on a power circuit board, the control module, the high-frequency driving module and the temperature measurement module are all arranged on a control circuit board, and the power circuit board and the control circuit board are a stacked structure arranged up and down.
8. The handheld radio frequency generator according to claim 1, characterized in that: It also includes a peripheral module, which includes a power switch, a gear switching and start button, and a gear / power indicator digital tube. The power switch is connected to the power supply module and supplies power to the control module. The gear switching and start button controls the start and stop of the control module through key input. The gear / power indicator digital tube receives the output indication of the control module and displays the current working status.
9. The handheld radio frequency generator according to claim 1, characterized in that: The transformer is an EE22 type transformer.
10. A radiofrequency ablation control system, characterized in that: The invention comprises a handheld radio frequency generator as claimed in any one of claims 1 to 9.