Medical radio frequency circuit

By designing a medical RF circuit containing multiple modules, the shortcomings in safety and processing effects of existing RF medical products are solved, and the safety monitoring and abnormal protection of RF energy are achieved, which significantly improves the safety and processing effect of the product.

CN222605229UActive Publication Date: 2025-03-14SHANXI STRONTIUM INTELLIGENT TECH CO LTD
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Patent Information

Application Number
CN202420969769.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-07
Publication Date
2025-03-14
Estimated Expiration
2034-05-07

AI Technical Summary

Technical Problem

Existing radio frequency medical products cannot be fully guaranteed in terms of product safety and treatment efficacy, resulting in skin burns and burns, which may cause unpredictable medical results to the patient in severe cases.

Method used

A medical radio frequency circuit is designed, including a power conversion module, a main control module, a power conversion module, a radio frequency safety control module, a radio frequency detection module and a programmable clock module. These modules can achieve safety monitoring, parameter adjustment and abnormal protection of radio frequency energy through interconnection and working together, ensuring the stable operation of the circuit and the safety of patients.

Benefits of technology

The safety and processing efficiency of the product are significantly improved. Through the safe operation monitoring of the main control module, the abnormal protection of the RF safety control module and the real-time acquisition of the RF detection module, the safe output of the RF energy is ensured, and problems such as skin burns and burns are avoided.

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Patent Text Reader

Abstract

According to the medical radio frequency circuit provided by the utility model, safe operation monitoring and radio frequency energy output parameter monitoring are carried out on the whole circuit through the main control module, a first guarantee is formed, and stable operation of the whole circuit is ensured; meanwhile, the radio frequency safety control module and the radio frequency detection module are combined to carry out radio frequency voltage abnormity protection to form a second guarantee, abnormity capture of limit parameters (the limit parameters set by hardware are higher than blocking parameters set by software) set by microsecond-level hardware can be realized, and output of radio frequency energy is rapidly blocked; meanwhile, a corresponding abnormal parameter interrupt signal is sent to the main control module; in addition, the power supply conversion module, the power conversion module, the radio frequency conversion module and the impedance matching module adopt a circuit function intrinsic safety design thought to form a third guarantee, so that the radio frequency energy output can be blocked when any fault occurs in the modules, and the condition that the patient cannot be injured due to the circuit fault is ensured.
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Description

Technical Field

[0001] The utility model belongs to the technical field of radio frequency equipment, and in particular relates to a medical radio frequency circuit. Background Art

[0002] In the medical beauty industry, high-energy radio frequency voltage and current with a frequency of 200KHz to 100Mhz are often used for actions such as pure cutting, mixed cutting, electrocoagulation, and electrocautery, especially in the beauty industry involving skin tightening, acne removal, wrinkle removal, and delaying skin aging. Therefore, a series of radio frequency medical products have been formed. Since these products emit high-energy radio frequency voltage and current, which are dangerous, and the existing products cannot fully guarantee the product safety and treatment efficacy, customers often suffer from skin scalds and burns, which can seriously lead to unexpected medical results and easily cause harm to patients. Utility Model Content

[0003] In order to solve the shortcomings and deficiencies of the prior art, a medical radio frequency circuit is provided, thereby solving the problem that the existing radio frequency medical products cannot fully guarantee the product safety and treatment efficacy and are very likely to cause harm to patients.

[0004] A medical radio frequency circuit provided to achieve the purpose of the utility model includes a power conversion module and a main control module, wherein the power conversion module is connected to the main control module, the power conversion module, and the radio frequency safety control module, and the main control module is connected to the radio frequency conversion module, the radio frequency safety control module, the radio frequency detection module, and the programmable clock module, so as to adjust the working parameters internally; the power conversion module is used to realize the inversion of direct current to alternating current; the radio frequency conversion module is connected to the power conversion module, and is used to realize the conversion of rectangular voltage waves into sinusoidal voltage waves and the transmission and isolation and boosting of radio frequency; the radio frequency conversion module is connected to the impedance matching module , used to match the RF output impedance with the human body loop impedance to maximize the efficiency of RF energy acquisition in the human body; the RF detection module is connected to the impedance matching module to collect the amplitude and phase of the output RF voltage and current; the RF safety control module is connected to the RF detection module and the programmable clock module to combine the RF frequency signal output by the programmable clock module with the RF energy output permission signal given by the main control module and the control signal fed back by the RF detection module to control the normal operation of the power conversion module; the programmable clock module realizes the required adjustment of the RF frequency signal by receiving the control data of the main control module.

[0005] The beneficial effects of the utility model are:

[0006] Compared with the prior art, the medical radio frequency circuit provided by the utility model significantly improves product safety and processing efficacy, as follows:

[0007] 1. The main control module monitors the overall safe operation and RF energy output parameters, forming the first layer of protection to ensure the stable operation of the entire circuit. The main control module monitors the safe operation by recording and monitoring whether each module is operating normally through the system servo program, especially for the error correction of poor control caused by abnormal interruption, abnormal mutation of memory data, paging backup and abnormal recovery of the field domain of key data and state machine, and error correction of illegal RF logic operation; at the same time, the main control module sets a double-level upper and lower limit range judgment (upper and lower limit warning value, upper and lower limit blocking value) for the RF physical parameters to realize the RF energy output parameter monitoring, so that when the output RF physical parameters exceed the upper and lower limit blocking value, the main control module immediately prohibits the output of RF energy.

[0008] 2. The RF safety control module and the RF detection module are combined to provide RF voltage abnormal protection, forming a second level of protection. They can capture abnormalities of the hardware-set limit parameters (the hardware-set limit parameters must be higher than the software-set blocking parameters) at the microsecond level, quickly block the output of RF energy, and send the corresponding abnormal parameter interrupt signal to the main control module.

[0009] 3. The power conversion module, power conversion module, RF conversion module and impedance matching module adopt the design concept of circuit function intrinsic safety, forming the third level of protection, so that any fault in the above modules will cause the blocking of RF energy output, ensuring that no harm is caused to the patient due to circuit fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the connection between the modules in the utility model;

[0011] Figure 2 It is a circuit connection diagram of the power conversion module in the utility model;

[0012] Figure 3 It is a circuit connection diagram of the power conversion module in the utility model;

[0013] Figure 4 This is a circuit connection diagram of the radio frequency conversion module in the utility model;

[0014] Figure 5 This is a circuit connection diagram of the impedance matching module in the present utility model;

[0015] Figure 6 This is a circuit connection diagram of the radio frequency safety control module in the utility model;

[0016] Figure 7This is a circuit connection diagram of the radio frequency detection module in the utility model;

[0017] Figure 8 The circuit connection of the main control module in the utility model Figure 1 ;

[0018] Fig. 9 The circuit connection of the main control module in the utility model Figure 2 ;

[0019] Fig.10 This is a circuit connection diagram of the programmable clock module in the utility model. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the utility model in conjunction with the accompanying drawings:

[0021] according to Figure 1 As shown, the utility model provides a medical radio frequency circuit, including a power conversion module and a main control module. The power conversion module is connected with the main control module, the power conversion module, and the radio frequency safety control module. The main control module is connected with the radio frequency conversion module, the radio frequency safety control module, the radio frequency detection module and the programmable clock module, so as to adjust the working parameters internally; the power conversion module is used to realize the inversion of direct current to alternating current; the radio frequency conversion module is connected with the power conversion module, and is used to realize the conversion of rectangular voltage waves into sinusoidal voltage waves and perform radio frequency transmission and isolation and boosting; the radio frequency conversion module is connected with the impedance matching module, and is used to make the radio frequency output impedance match the human body loop impedance. The impedance is matched to maximize the efficiency of human body RF energy acquisition; the RF detection module is connected with the impedance matching module to realize the acquisition of the amplitude and phase of the output RF voltage and current; the RF safety control module is connected with the RF detection module and the programmable clock module to control the normal operation of the power conversion module by combining the RF frequency signal output by the programmable clock module with the RF energy output permission signal given by the main control module and the control signal fed back by the RF detection module; the programmable clock module realizes the required adjustment of the RF frequency signal by receiving the control data of the main control module; the main control module is also connected with the communication interface for data transmission.

[0022] according to Figure 2As shown, the circuit of the power conversion module includes voltage regulators WY1-WY5, sockets CN1, CN7, polarized capacitors E1-E2, E6, E8-E15, E18-E23, E25-E30, E33-E38, capacitors C0-C6, C11, C27-C28, C38-C41, C45-C55, C59, C62-C63, C71-C72, C83, resistors R29, R61-R66, R81, R91-R92, transient voltage suppressor TVS2, inductors L1, L4, light emitting diodes DF3-DF5 and transistor D0, and pin 1 of the voltage regulator WY1 is connected to The negative electrode of the polarized capacitor E1-E2, pins 3-4 of the socket CN1 and one end of the capacitors C1-C3 and C5-C6 are connected to ground, pin 2 is connected to the other end of the capacitors C3-C5, one end of the inductor L1, one end of the resistor R29, one end of the capacitor C39, pins 1-2 of the regulator WY4 and the positive electrodes of the polarized capacitors E2, E25 and E38, pin 7 is connected to one end of the capacitor C41 and the negative electrode of the polarized capacitor E8 and then grounded, pin 6 is connected to the other end of the capacitor C41, the positive electrode of the polarized capacitor E8 and V2, pin 9 is connected to one end of the capacitor C40 and the negative electrode of the polarized capacitor E6 and then grounded, pin 10 is connected to the other end of the capacitor C40, the The positive electrode of the polar capacitor E6 is connected to the 12V power supply, one end of the capacitor C4 and the other end of C6 are grounded, the other end of the inductor L1 is connected to the other end of the capacitors C1-C2, the positive electrode of the polar capacitor E1 and the pin 3 of the transistor D0; the pins 1-2 of the socket CN1 are connected to the pins 1-2 of the transistor D0 and the 48V power supply; the pin 3 of the voltage regulator WY4 is connected to the other end of the capacitor C39 and the negative electrode of the polar capacitors E25 and E38 and then to ground, and the pins 4-5 are connected to one end of the capacitors C59 and C62, the negative electrodes of the polar capacitors E28, E33 and E37, one end of the resistors R62 and R64, the pin 1 of the voltage regulator WY5 and V O- is connected, pins 7-8 are connected to the positive electrodes of polarized capacitors E28, E33, E37, the other end of capacitor C59, the positive electrode of light-emitting diode DF5, one end of resistor R61, pin 3 of voltage regulator WY5 and VO+, the negative electrode of light-emitting diode DF5 is connected to one end of resistor R92, and the other end of resistor R92 is connected to VO-; pin 5 of voltage regulator WY5 is connected to the other end of capacitor C62 and the other ends of resistors R61-R62, pin 6 is connected to one end of capacitor C72, pin 2 is connected to the other end of capacitor C72 and one end of inductor L4, and pin 4 is connected to one end of capacitor C63 and one end of resistor R65;The other ends of the resistors R64-R65 are connected to one end of the resistor R63, the other end of the capacitor C63 is connected to one end of the resistor R66, the other end of the inductor L4 is connected to the other ends of the resistors R63 and R66, the positive electrodes of the polarized capacitors E29-E30, one end of the capacitor C71, one end of the transient voltage suppressor TVS2 and an 8V power supply, the negative electrodes of the polarized capacitors E29-E30 are connected to the other end of the capacitor C71, the other end of the transient voltage suppressor TVS2 and VO-; the pin 1 of the voltage regulator WY2 is connected to the negative electrodes of the polarized capacitors E9-E15 and one end of the capacitors C45-C51. The pins 2 and 4 are connected to the positive poles of the polarized capacitors E10-E15, the other end of the capacitors C46-C51, the positive pole of the light-emitting diode DF3 and the 3.3V power supply. The pin 3 is connected to the positive pole of the polarized capacitor E9, the other end of the diode C45 and V2. The negative pole of the light-emitting diode DF3 is connected to one end of the resistor R81, and the other end of the resistor R81 is grounded. The pin 1 of the voltage regulator WY3 is connected to the negative poles of the polarized capacitors E18-E19, E26-E27, one end of the capacitors C11, C27-C28, and C38, and then grounded. The pins 2 and 4 are connected to the capacitors C27-C28, C3 The other end of the pin 8, the positive electrode of the polarized capacitors E19, E26-E27 and V5 are connected, the pin 3 is connected to the other end of the capacitor C11, the positive electrode of the polarized capacitor E18, the positive electrode of the light-emitting diode DF4 and a 12V power supply, the negative electrode of the light-emitting diode DF4 is connected to one end of the resistor R91, and the other end of the resistor R91 is grounded; the negative electrodes of the polarized capacitors E20-E23, E34-E35 and one end of the capacitors C52-C55 are all grounded, the positive electrodes of the polarized capacitors E20-E23, E34-E35 and the other ends of the capacitors C52-C55 are all connected to a 3.3V power supply, and the positive electrode of the socket CN7 is connected to the positive electrode of the polarized capacitor E18, the positive electrode of the light-emitting diode DF4 and a 12V power supply. Pins 1 and 2 are connected to VO- and VO+ respectively. One end of the capacitor C83 and the negative electrode of the polar capacitor E36 are grounded. The other end of the capacitor C83 and the positive electrode of the polar capacitor E36 are connected to the 3.3V power supply. Both ends of the capacitor C0 are grounded. Among them: the input voltage range of the module is DC5-100V, the output voltage range is DC0-85V, the output power range is 0-600W, it has voltage and current detection feedback function and programmable hardware overvoltage and overcurrent protection function, and can communicate real-time data with the main control module; its output voltage and power determine the output voltage and power of the subsequent radio frequency. ;

[0023] according to Figure 3As shown, the circuit of the power conversion module includes chips U1-U5, NMOS transistors Q1-Q2, operational amplifier U28, capacitors C7-C10, C12-C20, C42-C44, C58, C64-C65, C82, polar capacitors E3-E5, E24, E39, diodes D1-D3, resistors R0, R5-R6, R8-R9, R11-R12, R14-R15, R25-R28, R30-R33, R37-R38, R41, R52, R77-R79, R89, inductor L2 and fuse F2; pin 2 of the chip U1 is connected to EN_VB Connect, pin 1 is connected to one end of capacitor C15 and a 5V power supply, pins 3 and 5 are both grounded, pin 4 is connected to one end of capacitor C17, pin 6 is connected to one end of capacitor C19, pin 12 is connected to the positive electrode of polar capacitor E24, one end of capacitor C16 and a 12V power supply, pin 11 is connected to the negative electrode of polar capacitor E24, the other end of capacitor C16 and then grounded, pin 7 is connected to one end of capacitor C18 and pin 1 of operational amplifier U28, pin 8 is connected to one end of resistor R79, pin 10 is connected to one end of resistors R6 and R9, pin 9 is connected to one end of resistor R41, pin 14 is connected to one end of capacitor C13, resistor R52, R77, one end of R11, the other end of resistor R41, pin 2 of NMOS transistor Q2 and one end of inductor L2 are connected, pin 15 is connected to the other end of capacitor C13, one end of resistor R78 and the cathode of diode D1, pin 13 is connected to the other end of resistors R78 and R52, one end of resistor R30, pin 16 is connected to one end of resistors R5 and R8, the other ends of capacitors C15, C17 and C19 are grounded, the other end of capacitor C18 is connected to one end of resistor R38, the other end of resistor R79 is grounded, the other end of resistor R6 is connected to the cathode of diode D3, the other end of resistor R9 is connected to the cathode of diode D4. The positive electrode of the diode D3 is connected to the pin 1 of the NMOS transistor Q2, the positive electrode of the diode D1 is connected to the 12V power supply, and the other end of the resistor R5 is connected to the negative electrode of the diode D2; the pin 2 of the operational amplifier U28 is connected to one end of the capacitor C82 and then to ground, the pin 3 is connected to the other end of the capacitor C82 and one end of the resistor R28, the pin 4 is connected to the other end of the resistor R38, one end of the resistors R14 and R27, and one end of the capacitor C20, the pin 5 is connected to V5, the other end of the resistor R14 is grounded, and the other end of the capacitor C20 is connected to one end of the resistor R25; the pin 3 of the NMOS transistor Q2 is grounded;Pin 1 of the NMOS transistor Q1 is connected to the other end of the resistor R8 and the positive electrode of the diode D2, pin 2 is connected to one end of the fuse F2, the positive electrodes of the polarized capacitors E3 and E39, and one end of the capacitors C7-C9, pin 3 is connected to the other ends of the resistors R11, R30, and R77, and the negative electrodes of the polarized capacitors E3 and E39 and the other ends of the capacitors C7-C9 are all grounded; pin 1 of the chip U3 is connected to the other end of the resistor R28, pin 2 is grounded, pins 3 and 6 are both connected to V5, and pins 4-5 are respectively connected to SDA2 and SCL2; the pins of the chip U2 are connected to the other end of the resistor R28, pin 2 is grounded, pins 3 and 6 are both connected to V5, and pins 4-5 are respectively connected to SDA2 and SCL2; Pin 1 is connected to one end of resistors R31-R32 and V5, pin 6 is connected to the other end of resistor R31 and one end of resistor R89, pin 8 is connected to one end of resistor R12, the other end of resistors R25 and R27, the other end of inductor L2, one end of capacitors C10, C12, C14 and the positive electrode of polarized capacitor E4, pin 7 is connected to the other end of resistor R12, the positive electrode of polarized capacitor E5, one end of resistor R37 and VBUS, pin 4 is connected to one end of resistor R26 and pins 2 and 6 of chip U4 and then grounded, pin 3 is connected to the other end of resistor R26 and the positive electrode of resistor R33 One end is connected, pin 2 is connected to the other end of resistor R33 and pin 1 of chip U4, pin 5 is connected to the other end of resistor R32, the other end of resistor R89 ​​is connected to EN_VB, the other end of capacitors C10, C12, C14, the negative electrode of polar capacitors E4-E5 and one end of resistor R0 are all grounded; pins 3-4 of chip U4 are connected to SCL2 and SDA2 respectively, and pin 5 is connected to V5; pin 1 of chip U5 is connected to the other end of resistor R37 and one end of resistor R15, and pins 2 and 6 are connected to the other end of resistors R0 and R15 The module is grounded, pins 3-4 are connected to SCL2 and SDA2 respectively, and pin 5 is connected to V5; one end of the capacitors C42-C44, C58, C64-C65 is connected to V5, and the other ends of the capacitors C42-C44, C58, C64-C65 are all grounded; wherein: the module cuts the stable DC voltage output by the power conversion module into a rectangular AC voltage with a duty cycle of 50% through a high-speed power electronic switch, realizing the inversion of DC to AC; the frequency of the AC is controlled by the frequency signal output by the programmable clock module, and the operating frequency range is 100K~100MHz.;

[0024] according to Figure 4As shown, the circuit of the RF conversion module includes chips U6, U17-U18, transistors D11-D12, NMOS transistors Q3-Q4, transformer T1, resistors R3-R4, R13, R71-R72, R82-R84, R87-R88, capacitors C29-C37, C84-C85, a polarized capacitor E7 and diodes D15-D18; Pin 1 of the chip U6 is connected to one end of the capacitor C37, the positive electrode of the polarized capacitor E7 and a 12V power supply, pins 7 and 9 are connected to the other end of the capacitor C37, the negative electrode of the polarized capacitor E7 and then grounded, and pin 5 is connected to one end of the resistors R71 and R83 and a 12V power supply. One end of capacitor C85 is connected, pin 6 is connected to one end of resistors R72 and R82 and one end of capacitor C84, pin 8 is connected to one end of resistors R4 and R88, pin 4 is connected to one end of capacitors C29-C30, C32, C34 and C80, pin 2 of NMOS transistor Q3, pin 3 of NMOS transistor Q4, pins 1-2 of transistor D11 and pin 3 of transistor D12, pin 2 is connected to the other end of capacitor C29, pin 3 is connected to one end of resistors R3 and R87, the other end of the resistor R71 is connected to the positive electrode of diode D16, the other end of capacitor C85 is grounded, and the other end of resistor R72 is connected to the positive electrode of diode D16. The other end of the capacitor C84 is connected to the positive electrode of the diode D15, the other end of the capacitor C84 is grounded, the other end of the resistor R88 is connected to the negative electrode of the diode D18, the other end of the resistor R4 is connected to the pin 1 of the NMOS transistor Q4, the positive electrode of the diode D18 and one end of the capacitor C81, the other end of the capacitor C81 is connected to the pin 2 of the NMOS transistor Q4 and the pin 1-2 of the transistor D12 and then grounded, the other end of the capacitor C80 is connected to the other end of the resistor R3, the positive electrode of the diode D17 and the pin 1 of the NMOS transistor Q3, the other end of the capacitor C30 is connected to one end of the capacitor C31, and the The other end is grounded, the other end of the capacitor C32 is connected to one end of the capacitor C33, the other end of the capacitor C33 is connected to L_1, and the other end of the resistor R87 is connected to the cathode of the diode D17; the pin 3 of the NMOS transistor Q3 is connected to the pin 3 of the transistor D11 and VBUS; the pin 2 of the transformer T1 is connected to the other end of the capacitor C34, the pins 4-5 are connected to one end of the resistor R13, the pin 8 is connected to one end of the capacitor C36, the pin 12 is connected to one end of the capacitor C35, the other end of the resistor R13 is grounded, and the other ends of the capacitors C35-C36 are connected to L_2 and L_3 respectively;Pins 1 and 5 of the chip U18 are connected to ENRF2, pin 2 is connected to pin 2 and RF1 of chip U17, pin 3 is connected to the other end of resistor R83 and the negative electrode of diode D16, pin 4 is grounded, pin 6 is connected to one end of resistor R84 and pin 4 of chip U17, pin 7 is connected to the other end of resistor R82 and the negative electrode of diode D15, and pin 8 is connected to V5; the other end of resistor R84 is connected to RFN1; pin 3 of chip U17 is grounded, and pin 5 is connected to V5; wherein: the module uses LC resonant cavity to convert rectangular voltage wave into sinusoidal voltage wave, and the main control module configures the parameters of LC resonant cavity so that its resonant frequency works at the required RF frequency; while realizing RF energy transmission, the RF voltage is isolated and boosted, and the transformer output voltage range is AC0~1000V, and the power capacity is 600VA. ;

[0025] according to Figure 5 As shown, the circuit in the impedance matching module includes chips J1-J2, chips U25, U30, socket CN9, voltage-stabilizing diodes D13-D14, and resistors R80, R90; Pin 1 of the chip U25 is connected to a 3.3V power supply, Pin 2 is connected to one end of the resistor R80, Pin 3 is connected to VO-, Pin 4 is connected to Pin 1 of the chip J1 and the positive electrode of the voltage-stabilizing diode D14, and the other end of the resistor R80 is connected to EN_2MHz; Pins 2 and 7 of the chip J1 are both connected to L_1, Pins 3 and 6 are both grounded, and Pin 8 is connected to the negative electrode of the voltage-stabilizing diode D14 and VO+; the chip Pin 1 of U30 is connected to a 3.3V power supply, pin 2 is connected to one end of resistor R90, pin 3 is connected to VO-, and pin 4 is connected to pin 1 of chip J2 and the positive electrode of Zener diode D13; the other end of the resistor R90 is connected to TEST; pins 4-5 of the chip J2 are respectively connected to RF_AC2 and RF_AC1, pin 3 is connected to pin 2 of socket CN9, pin 6 is connected to pin 1 of socket CN9, and pin 8 is connected to the negative electrode of Zener diode D13 and VO+; wherein: the module adjusts the RF output impedance to match the human body loop impedance to maximize the efficiency of human body RF energy acquisition.

[0026] according to Figure 6As shown, the circuit in the radio frequency safety control module includes chips U19-U23, resistors R55-R60, R67-R69, a sliding resistor R70 and capacitors C73-C74; Pin 5 of the chip U19 is connected to a 3.3V power supply, pin 1 is connected to pin 2 of the chip U22, pin 3 is connected to one end of resistors R59-R60 and a sliding end of a sliding resistor R70, pin 4 is connected to V_O and L_4, pin 2 is grounded, and the other end of the resistor R59 is connected to a 3.3V power supply and a sliding end of the sliding resistor R70. A fixed end of the sliding resistor R70 is connected, and the other end of the resistor R60 is connected to the other fixed end of the sliding resistor R70 and then grounded; Pin 1 of the chip U22 is grounded, Pin 3 is connected to Pin 2 of the chip U23, Pin 4 is connected to one end of the resistor R69, Pin 5 is connected to one end of the capacitor C74, Pin 6 is connected to the other end of the resistor R68 and one end of the capacitor C73, Pin 7 is connected to one end of the resistors R67-R68, Pin 8 is connected to the other end of the resistor R67 and a 3.3V power supply, and the The other end of the resistor R69 is connected to a 3.3V power supply, and the other ends of the capacitors C73-C74 are grounded; Pin 3 of the chip U23 is grounded, Pin 4 is connected to INT, Pins 3 and 5 of the chip U20, one end of the resistor R58, and Pins 5-6 of the chip U21, and Pin 5 is connected to a 3.3V power supply; Pin 4 of the chip U20 is connected to the other end of the resistor R58 and a 3.3V power supply, Pin 6 is connected to one end of resistors R55 and R57, Pin 1 is connected to the other end of the resistor R57 and one end of the resistor R56, Pin 2 is connected to the other end of the resistor R56 and then grounded, and the other end of the resistor R55 is connected to L_5; Pin 3 of the chip U21 is connected to ENRF1, Pin 4 is grounded, and Pin 8 is connected to a 3.3V power supply; Wherein: the module receives the RF frequency signal output by the programmable clock module, combines the RF energy output permission signal given by the main control module and the control signal fed back by the RF detection module, and generates a control signal for controlling the power conversion module to enable the power conversion module to work normally.

[0027] according to Figure 7As shown, the circuit in the RF detection module includes chips U9-U10, operational amplifiers U8A-U8B, resistors R16-R24, R34-R35, R39-R40, R42-R43, R50-R51, R53-R54, resistors EMI9-EMI10, transformers T2-T3, capacitors C21-C26, C69-C70, diodes D7-D10 and socket CN6; pin 1 of the chip U10 is connected to T7_CH2, pin 5 is connected to a 3.3V power supply, pin 3 is connected to one end of capacitor C25, and pin 4 is connected to one end of capacitor C25. Connected to RF_Iref, pin 2 is grounded, and the other end of the capacitor C25 is connected to RF_I; one end of the resistor R54 is connected to one end of the resistor R53 and one end of the capacitor C69, the other end of the resistor R54 is connected to one end of the capacitor C70 and L_5, the other end of the capacitors C69-C70 is grounded, and the other end of the resistor R53 is connected to ENRF; pin 4 of the operational amplifier U8B is grounded, pin 7 is connected to the cathode of the diode D7 and the anode of the diode D8, and pins 6 and 8 are both connected to the anode of the diode D7, one end of the resistor R18 and 3.3V power supply connection, pin 5 is connected to RF_Iref and one end of resistors R42-R43, the cathode of the diode D8 is connected to one end of resistors R21-R22 and R34, the other end of the resistor R34 is connected to one end of capacitor C26 and then grounded, the other end of the resistor R22 is connected to the other end of capacitor C26 and I_O and then grounded, the other end of the resistor R21 is connected to the other end of resistors R17-R18, one end of the resistor R17 is connected to one end of capacitor C21, the other end of the capacitor C21 is connected to the other end of resistor R43 and variable The pin 1 of the transformer T2 is connected, the other end of the resistor R42 is connected to one end of the resistor EMI9 and the pin 2 of the transformer T2, and the other end of the resistor EMI9 is ​​grounded; the pin 3 of the transformer T2 is connected to L_3, and the pin 4 is connected to one end of the resistor R40 and the pin 3-4 of the socket CN6; the pin 1 of the transformer T3 is connected to one end of the resistors R16 and R39, the pin 2 is connected to the other end of the resistors R16 and R40, the pin 3 is connected to one end of the resistor R50 and one end of the capacitors C22 and C24, and the pin 4 is connected to one end of the resistor R51, the capacitor C22 and the capacitor C24. One end of the resistor EMI10 is connected, the other end of the resistor EMI10 is grounded, the other end of the resistor R39 is connected to pins 1-2 and L_2 of the socket CN6; pin 1 of the operational amplifier U8A is connected to the cathode of the diode D9 and the anode of the diode D10, pin 2 is connected to the anode of the diode D9 and one end of the resistor R20, pin 3 is connected to RF_Vref, the cathode of the diode D10 is connected to one end of the resistors R23-R24 and R35, the other end of the resistor R35 is connected to one end of the capacitor C23 and then grounded, the resistor R The other end of 24 is connected to the other end of capacitor C23 and L_4, the other end of the resistor R23 is connected to one end of resistor R19 and the other end of resistor R20, and the other end of the resistor R19 is connected to the other end of capacitor C22; Pin 1 of the chip U9 is connected to T7_CH1, Pin 5 is connected to the 3.3V power supply, Pin 2 is grounded, and Pin 3 is connected to the other end of capacitor C24; wherein, the module realizes sampling of the voltage and current amplitude value of the output RF of the impedance matching module and the voltage and current phase of the output RF, and sends the collected values ​​to the main control module. It has a hardware extreme value detection function, judges the instantaneous abnormal RF voltage and current values, and quickly feeds back to the RF safety control module, prevents the power conversion module from working, and stops the RF output, and sends an abnormal interrupt request to the main control module. .

[0028] according to Figure 8-Figure 9As shown, the circuit of the main control module includes chips U12-U16, U24, U26, U29, sockets CN2-CN5, CN8, transformers TLT1-TLT3, regulator WY6, transient voltage suppressor TVS1, crystal oscillator Y2-Y3, resistors R49, R85, resistors EMI1-EMI6, resistors R1, R7, R10, R36, R45-R48, R73-R74, R86, capacitors C56-C57, C60-C61, C66-C68, C75-C77, C79, polar capacitors E16-E17, E31-E32 and light-emitting diodes DF1-D F2; Pins 14-20 of the chip U15 are connected to ENVBUS, EN_2MHz, U1_TX, U1_RX and R / D respectively, pins 41-49 are connected to I2C2SCL, U0_TX, U0_RX, WP, TB_INT, SWDIO and SWCLK respectively, pin 5 is connected to pin 3 of crystal oscillator Y2 and one end of capacitor C68, pin 6 is connected to pin 1 of crystal oscillator Y2 and one end of capacitor C67, pin 7 is connected to one end of resistor R36 and one end of capacitor C66, pin 1 is connected to one end of resistor R1, pins 13, 19, 32, 48, 64 are all connected to 3.3V Source connection, pins 12, 18, 31, 47, 60, and 63 are all grounded, pin 4 is connected to pin 2 of crystal oscillator Y3 and one end of capacitor C61, pin 3 is connected to pin 1 of crystal oscillator Y3 and one end of capacitor C60, pins 40, 51, and 52 are connected to I2C2SDA, U3_TX, and U3_RX respectively, pin 38 is connected to U5_RX and one end of resistor R10, pin 37 is connected to U5_TX and one end of resistor R7, pins 35-36 are connected to ENRF and INT respectively, pins 29-30 and 33 are connected to I2C1SCL, I2C1SDA, and R / D3 respectively, pins 57- 59 are connected to TEST, I2C0SCL, and I2C0SDA respectively, pins 26-27 are connected to T7_CH1 and T7_CH2 respectively, the other ends of the capacitors C60-C61, C66-C68, and pins 2-3 of the crystal oscillator Y2 are grounded, the other end of the resistor R7 is connected to the cathode of the light-emitting diode DF1, the other end of the resistor R10 is connected to the cathode of the light-emitting diode DF2, the other ends of the resistors R1 and R36, and the anodes of the light-emitting diodes DF1-DF2 are connected to a 3.3V power supply; pin 1 of the chip U12 is connected to one end of the capacitor C56, the anode of the polarized capacitor E16, and 3.3V power supply connection, pin 2 is connected to the other end of capacitor C56 and the negative electrode of polar capacitor E16 and then grounded, pin 3 is connected to U1_RX, pins 4-5 are connected to R / D, pin 6 is connected to U1_TX, pins 7-8 are grounded, pins 9-10 are connected to VO-, pin 12 is connected to one end of resistor EMI4, pin 13 is connected to one end of resistor EMI3, pin 15 is connected to one end of capacitor C57, the negative electrode of polar capacitor E17 and VO-, pin 16 is connected to the other end of capacitor C57, the positive electrode of polar capacitor E17 and VO5, the other end of the resistor EMI4 is connected to pin 2 of transient voltage suppressor TVS1, one end of resistor wire R49 and the pin of socket CN2 6, the other end of the resistor EMI3 is connected to pin 1 of the transient voltage suppressor TVS1, the other end of the resistor wire R49 and pin 5 of the socket CN2; pins 1-2 of the socket CN2 are connected to pin 1 of the transformer TLT1, pins 3-4 are connected to pin 3 of the transformer TLT1, and pins 2 and 4 of the transformer TLT1 are connected to VO+ and VO- respectively; pin 1 of the chip U24 is connected to one end of the capacitor C76, the positive electrode of the polar capacitor E32, and pins 2 and 4 of the regulator WY6, pins 2-3 are connected to RX2 and TX2 respectively, pin 4 is connected to VO-, pin 5 is grounded, and pins 6-7 are connected to U0_RX and U0_TX respectively , pin 8 is connected to the 3.3V power supply; pin 1 of the voltage regulator WY6 is connected to the other end of the capacitor C76, the negative electrode of the polar capacitor E31-E32 and VO-, and pin 3 is connected to the positive electrode of the polar capacitor E31, pin 2 of the transformer TLT3 and VO+; pin 1 of the transformer TLT3 is connected to pins 1-2 of the socket CN4, pin 3 is connected to pins 7-8 of the socket CN4, and pin 4 is connected to VO-; pin 4 of the socket CN4 is connected to one end of the resistor EMI5, pin 5 is connected to one end of the resistor EMI6, and the other ends of the resistors EMI5-EMI6 are connected to TX2 and RX2 respectively; pin 1 of the chip U26 is connected to VO5, pin 2 is connected to TX3 is connected to one end of the resistor EMI1, pin 3 is connected to RX3 and one end of the resistor EMI2, pin 4 is connected to VO-, pin 5 is connected to one end of the capacitor C75 and grounded, pins 6-7 are connected to U3_RX and U3_TX respectively, pin 8 is connected to the other end of the capacitor C75 and a 3.3V power supply; pin 1 of the socket CN3 is connected to VO+, pin 2 is connected to pin 1 of the transformer TLT2, pin 3 is connected to pin 3 of the transformer TLT2, pin 4 is connected to the other end of the resistor EMI1, pin 5 is connected to the other end of the resistor EMI2, pins 2 and 4 of the transformer TLT2 are connected to an 8V power supply and VO- respectively; pins 1 and 3 of the chip U16.3V power supply connection, pins 3-6, 11-14 are connected to ENVBUS, RF, ENRF1, RFN, RFN1, ENRF2, RF1, EN_VB respectively, pins 2, 8, 9, 15 are all grounded, and pin 16 is connected to V5; pin 1 of the chip U29 is connected to VO5, pin 2 is connected to one end of the resistor R85, pin 3 is connected to one end of the capacitor C77 and then grounded, pin 4 is connected to one end of the resistor R86 and TB_INT, the other end of the resistor R85 is connected to pin 1 of the socket CN8 and one end of the capacitor C79, the other end of the capacitor C79 and pin 2 of the socket CN8 are both connected to VO-, and the other end of the resistor R86 is connected to the 3.3V power supply. The pin 1 of the socket CN5 is grounded, the pins 2-3 are connected to SWCLK and SWDIO respectively, and the pin 4 is connected to the 3.3V power supply; the pins 2-4 of the chip U14 are all grounded, the pin 5 is connected to I2C2SDA and one end of the resistor R48, the pin 6 is connected to I2C2SCL and one end of the resistor R47, the pin 7 is connected to WP, and the pin 8 is connected to the other end of the resistor R47-R48 and the 3.3V power supply; wherein: the module plays the role of initializing the working parameters of the key modules internally, and the detection of the operating parameters enables each module to work at the required frequency, voltage and power parameters; it provides a unified control interface externally, so that the entire RF circuit can work according to the programmable control technical parameters, and is easy to use. .

[0029] according to Fig.10 As shown, the circuit in the programmable clock module includes a chip U11, a crystal oscillator Y1, resistors R75-R76, a capacitor JC and a capacitor C87; Pin 2 of the chip U11 is connected to Pin 3 of the crystal oscillator Y1 and one end of the diode JC, Pin 3 is connected to Pin 1 of the crystal oscillator Y1 and one end of the capacitor C87, Pin 4 is connected to one end of the resistor R76 and I2C1SCL, Pin 5 is connected to one end of the resistor R75 and I2C1SDA, Pin 8 is grounded, Pins 1 and 7 are connected to a 3.3V power supply, and Pins 9-10 are connected to RFN and RF respectively; the other end of the capacitor JC, the other end of the capacitor C87 and Pins 2 and 4 of the crystal oscillator Y1 are grounded; the other end of the resistors R75-R76 are connected to a 3.3V power supply; wherein: the module adjusts the required RF frequency signal by receiving control data from the main control module.

[0030] The utility model provides a medical radio frequency circuit, the principle of radio frequency energy generation is as follows:

[0031] 1. The energy required by the power conversion module is taken from the external high-power DC power supply dcVin (the voltage range that the power conversion module can receive is DC5~100V). The power conversion module can work in boost or buck mode, according to the set value dcVset of the power conversion module output voltage given by the main control module. When dcVin>dcVset, the power conversion module works in buck mode; when dcVin≤dcVset, the power conversion module works in boost mode.

[0032] 2. The output voltage of the power conversion module is used as the input working voltage of the power conversion module. The circuit of the power conversion module is mainly composed of a half-bridge inverter circuit composed of a high-power NMOS tube and a high-speed half-bridge drive circuit, in which the drive control frequency fdrv of the half-bridge drive circuit is consistent with the frequency fo of the RF energy. After passing through the power conversion module, dcVset is cut by the high-power NMOS tube into a rectangular voltage energy square wave with a high and low level width consistent with the frequency fdrv.

[0033] 3. The rectangular voltage energy square wave is input into the RF conversion module. After passing through the series resonant cavity formed by the inductor and capacitor of the RF conversion module, a quasi-sine wave alternating current acV1 is obtained at both ends of the capacitor. The resonant frequency f1 of the series resonant cavity is matched in advance under the control of the main control module to be consistent with the required RF frequency fo, that is, f1=fo.

[0034] 4. The quasi-sine wave alternating current acV1 is frequency-selected in the radio frequency conversion module to obtain a standard sinusoidal radio frequency alternating current acV2.

[0035] 5. The radio frequency alternating current acV2 raises the required radio frequency output voltage value acVo (output voltage range AC5 ~ 1000V) in the radio frequency conversion module (transformation ratio range 1 ~ 16 times) to meet the purpose of medical treatment.

[0036] 6. In order to achieve the best treatment effect, the RF output voltage value acVo is output to the surgical electrode of the medical device after passing through the impedance matching circuit.

[0037] The principles of control and detection of RF energy are as follows:

[0038] 1. The frequency fs parameter of the radio frequency energy required for the treatment effect to be achieved is input to the main control module through the communication interface. Through the setting function of the main control module, the output controls the radio frequency signal f0=fs generated by the programmable clock module, and the output controls the radio frequency conversion module to make its resonant frequency f1=fs. The radio frequency detection module can collect the waveform frequency of the voltage and current at the output end of the impedance matching module at high speed and send it to the main control module for comparison between the set value and the target value of the radio frequency, and then use PID adjustment to make the output target value of the radio frequency equal to the set value.

[0039] 2. The voltage acVs or current acAs parameters of the radio frequency energy required for the treatment effect to be achieved are input to the main control module through the communication interface. Through the setting function of the main control module, the output control power conversion module makes its output voltage value dcVset meet the requirements of the subsequent module, and the final output radio frequency voltage value acVo = acVs or radio frequency current value acAo = acAs. The radio frequency detection circuit collects the voltage value or current value output by the impedance matching module in real time and feeds it back to the main control module. The main control module uses the digital PID control method of the application software to make adjustments. When the feedback voltage value acVo or current value acAo is less than the set voltage value acVs or current value acAs, the output voltage value dcVset of the power conversion module is appropriately increased; when the feedback voltage value acVo or current value acAo is greater than the set voltage value acVs or current value acAs, the output voltage value dcVset of the power conversion module is appropriately reduced.

[0040] 3. According to the different RF energy modes required for the treatment effect to be achieved, the main control module can control the power conversion module, RF conversion module, and impedance matching module to work in constant voltage output mode, constant current output mode, and constant power output mode. According to the amount of treatment energy to be achieved, the main control module can control the entire RF generation circuit to work in a continuous output mode with high and low RF voltage changes or in an interval energy output mode with a fixed time period with a constant RF voltage.

[0041] The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments can be combined with each other to form new embodiments. The above embodiments are only used to illustrate the technical solutions of the utility model and are not intended to limit them. Any modification or equivalent replacement that does not deviate from the spirit and scope of the utility model shall be included in the scope of the technical solution of the utility model.

Claims

1. A medical radio frequency circuit, characterized in that: The invention comprises a power conversion module and a main control module, wherein the power conversion module is connected with the main control module, the power conversion module and the radio frequency safety control module, and the main control module is connected with the radio frequency conversion module, the radio frequency safety control module, the radio frequency detection module and the programmable clock module, so as to adjust the working parameters internally; the power conversion module is used to realize the inversion of direct current to alternating current; the radio frequency conversion module is connected with the power conversion module, and is used to realize the conversion of rectangular voltage wave into sinusoidal voltage wave and perform radio frequency transmission and isolation boost; the radio frequency conversion module is connected with the impedance matching module, and is used to match the radio frequency output impedance with the human body loop impedance, so as to maximize the efficiency of obtaining radio frequency energy from the human body; the radio frequency detection module is connected with the impedance matching module, and is used to realize the conversion of the rectangular voltage wave into the ... realize the conversion of the rectangular voltage wave into the sinusoidal voltage wave and perform radio frequency transmission and isolation boost; the radio frequency conversion module is connected with the impedance matching module, and is used to realize the conversion of the rectangular voltage wave into the sinusoidal voltage wave and perform radio frequency transmission and isolation boost; the radio frequency conversion module is connected with the impedance matching module, and is used to realize the conversion of the rectangular voltage wave into the sinusoidal voltage wave and perform radio frequency transmission and isolation boost; the radio frequency conversion module is connected with the impedance matching module, and is used to realize the conversion of the rectangular voltage wave into the sinusoidal voltage wave and perform radio frequency transmission and isolation boost; the radio frequency conversion module is connected with the impedance matching module, and is used to realize the conversion of the rectangular voltage wave The anti-matching module is connected to realize the acquisition of the amplitude and phase of the output RF voltage and current; the RF safety control module is connected to the RF detection module and the programmable clock module, and is used to combine the RF frequency signal output by the programmable clock module with the RF energy output permission signal given by the main control module and the control signal fed back by the RF detection module to control the normal operation of the power conversion module; the programmable clock module adjusts the required RF frequency signal by receiving the control data of the main control module; the circuit of the power conversion module includes voltage stabilizers WY1-WY5, sockets CN1, CN7, polar capacitors E1-E2, E6, E8-E15, E18-E23, E25-E30, E33-E38, capacitors C0-C6, C11, C27-C28, C38-C41, C45-C55, C59, C62-C63, C71-C72, C83, resistors R29, R61-R66, R81, R91-R92, transient voltage suppressor TVS2, inductors L1, L4, light emitting diodes DF3-DF5 and transistor D0, pin 1 of the voltage regulator WY1 is connected to the negative electrode of the polar capacitors E1-E2, pins 3-4 of the socket CN1 and one end of the capacitors C1-C3 and C5-C6 and then grounded, pin 2 is connected to the other end of the capacitors C3-C5, one end of the inductor L1, one end of the resistor R29, one end of the capacitor C39, and the voltage regulator WY4 Pins 1-2 are connected to the positive electrodes of polarized capacitors E2, E25, and E38, pin 7 is connected to one end of capacitor C41 and the negative electrode of polarized capacitor E8 and then grounded, pin 6 is connected to the other end of capacitor C41, the positive electrode of polarized capacitor E8 and V2, pin 9 is connected to one end of capacitor C40 and the negative electrode of polarized capacitor E6 and then grounded, pin 10 is connected to the other end of capacitor C40, the positive electrode of polarized capacitor E6 and a 12V power supply, one end of the capacitor C4 and the other end of C6 are both grounded, the other end of the inductor L1 is connected to the other end of capacitors C1-C2, the positive electrode of polarized capacitor E1 and pin 3 of transistor D0; pins 1-2 of socket CN1 are connected to pins 1-2 of transistor D0 and a 48V power supply;Pin 3 of the voltage regulator WY4 is connected to the other end of the capacitor C39 and the negative electrodes of the polarized capacitors E25 and E38 and then to ground; pins 4-5 are connected to one end of the capacitors C59 and C62, the negative electrodes of the polarized capacitors E28, E33 and E37, one end of the resistors R62 and R64, pin 1 of the voltage regulator WY5 and VO-; pins 7-8 are connected to the positive electrodes of the polarized capacitors E28, E33 and E37, the other end of the capacitor C59, the positive electrode of the light-emitting diode DF5, one end of the resistor R61, pin 3 of the voltage regulator WY5 and VO+; the negative electrode of the light-emitting diode DF5 is connected to one end of the resistor R92; the resistor R92 The other end of the voltage regulator WY5 is connected to VO-; Pin 5 of the voltage regulator WY5 is connected to the other end of the capacitor C62 and the other end of the resistors R61-R62, Pin 6 is connected to one end of the capacitor C72, Pin 2 is connected to the other end of the capacitor C72 and one end of the inductor L4, Pin 4 is connected to one end of the capacitor C63 and one end of the resistor R65; The other ends of the resistors R64-R65 are connected to one end of the resistor R63, the other end of the capacitor C63 is connected to one end of the resistor R66, the other end of the inductor L4 is connected to the other ends of the resistors R63 and R66, the positive electrode of the polar capacitors E29-E30, one end of the capacitor C71, the transient voltage One end of the suppressor TVS2 is connected to an 8V power supply, and the cathode of the polar capacitor E29-E30 is connected to the other end of the capacitor C71, the other end of the transient voltage suppressor TVS2 and VO-; the pin 1 of the voltage regulator WY2 is connected to the cathode of the polar capacitor E9-E15 and one end of the capacitor C45-C51 and then grounded, and the pins 2 and 4 are connected to the anode of the polar capacitor E10-E15, the other end of the capacitor C46-C51, the anode of the light-emitting diode DF3 and a 3.3V power supply, and the pin 3 is connected to the anode of the polar capacitor E9, the other end of the diode C45 and V2, and the cathode of the light-emitting diode DF3 is connected to the resistor R 81, and the other end of the resistor R81 is grounded; the pin 1 of the voltage stabilizer WY3 is connected to the negative electrodes of the polarized capacitors E18-E19, E26-E27, one end of the capacitors C11, C27-C28, and C38 and then grounded, the pins 2 and 4 are connected to the other ends of the capacitors C27-C28, C38, the positive electrodes of the polarized capacitors E19, E26-E27 and V5, the pin 3 is connected to the other end of the capacitor C11, the positive electrode of the polarized capacitor E18, the positive electrode of the light emitting diode DF4 and the 12V power supply, the negative electrode of the light emitting diode DF4 is connected to one end of the resistor R91, and the other end of the resistor R91 is grounded;The negative electrodes of the polarized capacitors E20-E23, E34-E35 and one end of the capacitors C52-C55 are grounded, the positive electrodes of the polarized capacitors E20-E23, E34-E35 and the other ends of the capacitors C52-C55 are connected to a 3.3V power supply, the pins 1 and 2 of the socket CN7 are connected to VO- and VO+ respectively, one end of the capacitor C83 and the negative electrode of the polarized capacitor E36 are grounded, the other end of the capacitor C83 and the positive electrode of the polarized capacitor E36 are connected to a 3.3V power supply, and both ends of the capacitor C0 are grounded. ; 2. A medical radio frequency circuit according to claim 1, characterized in that: The circuit of the power conversion module includes chips U1-U5, NMOS transistors Q1-Q2, operational amplifier U28, capacitors C7-C10, C12-C20, C42-C44, C58, C64-C65, C82, polar capacitors E3-E5, E24, E39, diodes D1-D3, resistors R0, R5-R6, R8-R9, R11-R12, R14-R15, R25-R28, R30-R33, R37-R38, R41, R52, R77-R79, R89, inductor L2 and fuse F2; pin 2 of the chip U1 is connected to EN_VB , pin 1 is connected to one end of capacitor C15 and a 5V power supply, pins 3 and 5 are grounded, pin 4 is connected to one end of capacitor C17, pin 6 is connected to one end of capacitor C19, pin 12 is connected to the positive electrode of polar capacitor E24, one end of capacitor C16 and a 12V power supply, pin 11 is connected to the negative electrode of polar capacitor E24, the other end of capacitor C16 and then grounded, pin 7 is connected to one end of capacitor C18 and pin 1 of operational amplifier U28, pin 8 is connected to one end of resistor R79, pin 10 is connected to one end of resistors R6 and R9, pin 9 is connected to one end of resistor R41, pin 14 is connected to one end of capacitor C13, resistors R52, R 77, one end of R11, the other end of resistor R41, pin 2 of NMOS transistor Q2 and one end of inductor L2 are connected, pin 15 is connected to the other end of capacitor C13, one end of resistor R78 and the cathode of diode D1, pin 13 is connected to the other ends of resistors R78 and R52, and one end of resistor R30, pin 16 is connected to one end of resistors R5 and R8, the other ends of capacitors C15, C17 and C19 are grounded, the other end of capacitor C18 is connected to one end of resistor R38, the other end of resistor R79 is grounded, the other end of resistor R6 is connected to the cathode of diode D3, the other end of resistor R9 is connected to diode The positive electrode of the tube D3 is connected to the pin 1 of the NMOS transistor Q2, the positive electrode of the diode D1 is connected to the 12V power supply, and the other end of the resistor R5 is connected to the negative electrode of the diode D2; the pin 2 of the operational amplifier U28 is connected to one end of the capacitor C82 and then grounded, the pin 3 is connected to the other end of the capacitor C82 and one end of the resistor R28, the pin 4 is connected to the other end of the resistor R38, one end of the resistors R14 and R27, and one end of the capacitor C20, the pin 5 is connected to V5, the other end of the resistor R14 is grounded, and the other end of the capacitor C20 is connected to one end of the resistor R25; the pin 3 of the NMOS transistor Q2 is grounded;Pin 1 of the NMOS transistor Q1 is connected to the other end of the resistor R8 and the positive electrode of the diode D2, pin 2 is connected to one end of the fuse F2, the positive electrodes of the polarized capacitors E3 and E39, and one end of the capacitors C7-C9, pin 3 is connected to the other ends of the resistors R11, R30, and R77, and the negative electrodes of the polarized capacitors E3 and E39 and the other ends of the capacitors C7-C9 are all grounded; pin 1 of the chip U3 is connected to the other end of the resistor R28, pin 2 is grounded, pins 3 and 6 are both connected to V5, and pins 4- 5 are connected to SDA2 and SCL2 respectively; Pin 1 of the chip U2 is connected to one end of the resistors R31-R32 and V5, Pin 6 is connected to the other end of the resistor R31 and one end of the resistor R89, Pin 8 is connected to one end of the resistor R12, the other end of the resistors R25 and R27, the other end of the inductor L2, one end of the capacitors C10, C12, C14 and the positive electrode of the polarized capacitor E4, Pin 7 is connected to the other end of the resistor R12, the positive electrode of the polarized capacitor E5, one end of the resistor R37 and VBUS The pin 4 is connected to one end of the resistor R26 and the pins 2 and 6 of the chip U4 and then grounded. The pin 3 is connected to the other end of the resistor R26 and one end of the resistor R33. The pin 2 is connected to the other end of the resistor R33 and the pin 1 of the chip U4. The pin 5 is connected to the other end of the resistor R32. The other end of the resistor R89 ​​is connected to EN_VB. The other ends of the capacitors C10, C12, and C14, the negative electrodes of the polar capacitors E4-E5, and one end of the resistor R0 are all grounded. The pins 3-4 of the chip U4 are connected to the ground. Connected to SCL2 and SDA2 respectively, and pin 5 is connected to V5; Pin 1 of the chip U5 is connected to the other end of resistor R37 and one end of resistor R15, pins 2 and 6 are connected to the other end of resistors R0 and R15 and then grounded, pins 3-4 are connected to SCL2 and SDA2 respectively, and pin 5 is connected to V5; one end of the capacitors C42-C44, C58, C64-C65 is connected to V5, and the other ends of the capacitors C42-C44, C58, C64-C65 are all grounded. ; 3. A medical radio frequency circuit according to claim 1, characterized in that: The circuit of the radio frequency conversion module includes chips U6, U17-U18, transistors D11-D12, NMOS transistors Q3-Q4, transformer T1, resistors R3-R4, R13, R71-R72, R82-R84, R87-R88, capacitors C29-C37, C84-C85, a polarized capacitor E7 and diodes D15-D18; Pin 1 of the chip U6 is connected to one end of the capacitor C37, the positive electrode of the polarized capacitor E7 and a 12V power supply, pins 7 and 9 are connected to the other end of the capacitor C37, the negative electrode of the polarized capacitor E7 and then grounded, and pin 5 is connected to one end of the resistors R71 and R83 and a capacitor C The first embodiment of the present invention is connected to one end of the first transistor 85, the first pin 6 is connected to one end of the resistors R72 and R82 and one end of the capacitor C84, the first pin 8 is connected to one end of the resistors R4 and R88, the first pin 4 is connected to one end of the capacitors C29-C30, C32, C34 and C80, the pin 2 of the NMOS transistor Q3, the pin 3 of the NMOS transistor Q4, the pins 1-2 of the transistor D11 and the pin 3 of the transistor D12, the first pin 2 is connected to the other end of the capacitor C29, the first pin 3 is connected to one end of the resistors R3 and R87, the other end of the resistor R71 is connected to the positive electrode of the diode D16, the other end of the capacitor C85 is grounded, and the other end of the resistor R72 is connected to the positive electrode of the diode D16. The anode of the diode D15 is connected, the other end of the capacitor C84 is grounded, the other end of the resistor R88 is connected to the cathode of the diode D18, the other end of the resistor R4 is connected to the pin 1 of the NMOS transistor Q4, the anode of the diode D18 and one end of the capacitor C81, the other end of the capacitor C81 is connected to the pin 2 of the NMOS transistor Q4 and the pin 1-2 of the transistor D12 and then grounded, the other end of the capacitor C80 is connected to the other end of the resistor R3, the anode of the diode D17 and the pin 1 of the NMOS transistor Q3, the other end of the capacitor C30 is connected to one end of the capacitor C31, the other end of the capacitor C31 is connected to the One end is grounded, the other end of the capacitor C32 is connected to one end of the capacitor C33, the other end of the capacitor C33 is connected to L_1, and the other end of the resistor R87 is connected to the cathode of the diode D17; the pin 3 of the NMOS transistor Q3 is connected to the pin 3 of the transistor D11 and VBUS; the pin 2 of the transformer T1 is connected to the other end of the capacitor C34, the pins 4-5 are connected to one end of the resistor R13, the pin 8 is connected to one end of the capacitor C36, the pin 12 is connected to one end of the capacitor C35, the other end of the resistor R13 is grounded, and the other ends of the capacitors C35-C36 are connected to L_2 and L_3 respectively;Pins 1 and 5 of the chip U18 are connected to ENRF2, pin 2 is connected to pin 2 and RF1 of chip U17, pin 3 is connected to the other end of resistor R83 and the cathode of diode D16, pin 4 is grounded, pin 6 is connected to one end of resistor R84 and pin 4 of chip U17, pin 7 is connected to the other end of resistor R82 and the cathode of diode D15, and pin 8 is connected to V5; the other end of resistor R84 is connected to RFN1; pin 3 of chip U17 is grounded, and pin 5 is connected to V5. ; 4. A medical radio frequency circuit according to claim 1, characterized in that: The circuit in the impedance matching module includes chips J1-J2, chips U25, U30, socket CN9, voltage-stabilizing diodes D13-D14, and resistors R80, R90; Pin 1 of the chip U25 is connected to a 3.3V power supply, pin 2 is connected to one end of the resistor R80, pin 3 is connected to VO-, pin 4 is connected to pin 1 of the chip J1 and the positive electrode of the voltage-stabilizing diode D14, and the other end of the resistor R80 is connected to EN_2MHz; Pins 2 and 7 of the chip J1 are both connected to L_1, pins 3 and 6 are both grounded, and pin 8 is connected to the voltage-stabilizing The cathode of the diode D14 is connected to VO+; Pin 1 of the chip U30 is connected to a 3.3V power supply, Pin 2 is connected to one end of the resistor R90, Pin 3 is connected to VO-, Pin 4 is connected to Pin 1 of the chip J2 and the anode of the Zener diode D13; The other end of the resistor R90 is connected to TEST; Pins 4-5 of the chip J2 are respectively connected to RF_AC2 and RF_AC1, Pin 3 is connected to Pin 2 of the socket CN9, Pin 6 is connected to Pin 1 of the socket CN9, and Pin 8 is connected to the cathode of the Zener diode D13 and VO+.

5. The medical radio frequency circuit according to claim 1, characterized in that: The circuit in the radio frequency safety control module includes chips U19-U23, resistors R55-R60, R67-R69, a sliding resistor R70 and capacitors C73-C74; Pin 5 of the chip U19 is connected to a 3.3V power supply, Pin 1 is connected to Pin 2 of the chip U22, Pin 3 is connected to one end of resistors R59-R60 and the sliding end of the sliding resistor R70, Pin 4 is connected to V_O and L_4, Pin 2 is grounded, the other end of the resistor R59 is connected to a 3.3V power supply and a fixed end of the sliding resistor R70, and the other end of the resistor R60 is connected to the other fixed end of the sliding resistor R70 and then grounded; Pin 1 of the chip U22 is grounded, Pin 3 is connected to Pin 2 of the chip U23, Pin 4 is connected to one end of the resistor R69, Pin 5 is connected to one end of the capacitor C74, Pin 6 is connected to the other end of the resistor R68 and one end of the capacitor C73, Pin 7 is connected to one end of resistors R67-R68, pin 8 is connected to the other end of resistor R67 and a 3.3V power supply, the other end of the resistor R69 is connected to a 3.3V power supply, and the other ends of the capacitors C73-C74 are grounded; pin 3 of the chip U23 is grounded, pin 4 is connected to INT, pins 3 and 5 of chip U20, one end of resistor R58 and pins 5-6 of chip U21, and pin 5 is connected to a 3.3V power supply; pin 4 of the chip U20 is connected to the other end of resistor R58 and a 3.3V power supply, pin 6 is connected to one end of resistors R55 and R57, pin 1 is connected to the other end of resistor R57 and one end of resistor R56, pin 2 is connected to the other end of resistor R56 and then grounded, and the other end of the resistor R55 is connected to L_5; pin 3 of the chip U21 is connected to ENRF1, pin 4 is grounded, and pin 8 is connected to a 3.3V power supply.

6. The medical radio frequency circuit according to claim 1, characterized in that: The circuit in the radio frequency detection module includes chips U9-U10, operational amplifiers U8A-U8B, resistors R16-R24, R34-R35, R39-R40, R42-R43, R50-R51, R53-R54, resistors EMI9-EMI10, transformers T2-T3, capacitors C21-C26, C69-C70, diodes D7-D10 and socket CN6; pin 1 of the chip U10 is connected to T7_CH2, pin 5 is connected to a 3.3V power supply, pin 3 is connected to one end of capacitor C25, and pin 4 is connected to RF_Iref is connected, pin 2 is grounded, and the other end of the capacitor C25 is connected to RF_I; one end of the resistor R54 is connected to one end of the resistor R53 and one end of the capacitor C69, and the other end of the resistor R54 is connected to one end of the capacitor C70 and L_5, and the other end of the capacitors C69-C70 is grounded, and the other end of the resistor R53 is connected to ENRF; pin 4 of the operational amplifier U8B is grounded, pin 7 is connected to the cathode of the diode D7 and the anode of the diode D8, and pins 6 and 8 are both connected to the anode of the diode D7, one end of the resistor R18 and 3.3V power supply connection, pin 5 is connected to RF_Iref and one end of resistors R42-R43, the cathode of the diode D8 is connected to one end of resistors R21-R22 and R34, the other end of the resistor R34 is connected to one end of capacitor C26 and then grounded, the other end of the resistor R22 is connected to the other end of capacitor C26 and I_O and then grounded, the other end of the resistor R21 is connected to the other end of resistors R17-R18, one end of the resistor R17 is connected to one end of capacitor C21, and the The other end is connected to the other end of the resistor R43 and the pin 1 of the transformer T2, the other end of the resistor R42 is connected to one end of the resistor EMI9 and the pin 2 of the transformer T2, and the other end of the resistor EMI9 is ​​grounded; the pin 3 of the transformer T2 is connected to L_3, and the pin 4 is connected to one end of the resistor R40 and the pin 3-4 of the socket CN6; the pin 1 of the transformer T3 is connected to one end of the resistors R16 and R39, the pin 2 is connected to the other end of the resistors R16 and R40, and the pin 3 is connected to one end of the resistor R50 and one end of capacitors C22 and C24, pin 4 is connected to one end of resistor R51 and one end of resistor EMI10, the other end of resistor EMI10 is grounded, the other end of resistor R39 is connected to pins 1-2 and L_2 of socket CN6; pin 1 of operational amplifier U8A is connected to the cathode of diode D9 and the anode of diode D10, pin 2 is connected to the anode of diode D9 and one end of resistor R20, pin 3 is connected to RF_Vref, the cathode of diode D10 is connected to resistor R23 -R24 and one end of R35 are connected, the other end of the resistor R35 is connected to one end of the capacitor C23 and then grounded, the other end of the resistor R24 ​​is connected to the other end of the capacitor C23 and L_4, the other end of the resistor R23 is connected to one end of the resistor R19 and the other end of the resistor R20, and the other end of the resistor R19 is connected to the other end of the capacitor C22; Pin 1 of the chip U9 is connected to T7_CH1, Pin 5 is connected to the 3.3V power supply, Pin 2 is grounded, and Pin 3 is connected to the other end of the capacitor C24. .

7. The medical radio frequency circuit according to claim 1, characterized in that: The circuit of the main control module includes chips U12-U16, U24, U26, U29, sockets CN2-CN5, CN8, transformers TLT1-TLT3, voltage regulator WY6, transient voltage suppressor TVS1, crystal oscillator Y2-Y3, resistors R49, R85, resistors EMI1-EMI6, resistors R1, R7, R10, R36, R45-R48, R73-R74, R86, capacitors C56-C57, C60-C61, C66-C68, C75-C77, C79, polar capacitors E16-E17, E31-E32 and light-emitting diodes DF1-DF2 ; Pins 14-20 of the chip U15 are connected to ENVBUS, EN_2MHz, U1_TX, U1_RX and R / D respectively, pins 41-49 are connected to I2C2SCL, U0_TX, U0_RX, WP, TB_INT, SWDIO and SWCLK respectively, pin 5 is connected to pin 3 of crystal oscillator Y2 and one end of capacitor C68, pin 6 is connected to pin 1 of crystal oscillator Y2 and one end of capacitor C67, pin 7 is connected to one end of resistor R36 and one end of capacitor C66, pin 1 is connected to one end of resistor R1, pins 13, 19, 32, 48, 64 are all connected to 3.3V power supply Connect, pins 12, 18, 31, 47, 60, and 63 are all grounded, pin 4 is connected to pin 2 of crystal oscillator Y3 and one end of capacitor C61, pin 3 is connected to pin 1 of crystal oscillator Y3 and one end of capacitor C60, pins 40, 51, and 52 are connected to I2C2SDA, U3_TX, and U3_RX respectively, pin 38 is connected to U5_RX and one end of resistor R10, pin 37 is connected to U5_TX and one end of resistor R7, pins 35-36 are connected to ENRF and INT respectively, pins 29-30 and 33 are connected to I2C1SCL, I2C1SDA, and R / D3 respectively, and pins 57-5 9 are connected to TEST, I2C0SCL, and I2C0SDA respectively, pins 26-27 are connected to T7_CH1 and T7_CH2 respectively, the other ends of the capacitors C60-C61, C66-C68, and pins 2-3 of the crystal oscillator Y2 are grounded, the other end of the resistor R7 is connected to the cathode of the light-emitting diode DF1, the other end of the resistor R10 is connected to the cathode of the light-emitting diode DF2, the other ends of the resistors R1 and R36, and the anodes of the light-emitting diodes DF1-DF2 are connected to a 3.3V power supply; pin 1 of the chip U12 is connected to one end of the capacitor C56, the anode of the polarized capacitor E16, and 3.3V power supply connection, pin 2 is connected to the other end of capacitor C56 and the negative electrode of polar capacitor E16 and then grounded, pin 3 is connected to U1_RX, pins 4-5 are connected to R / D, pin 6 is connected to U1_TX, pins 7-8 are grounded, pins 9-10 are connected to VO-, pin 12 is connected to one end of resistor EMI4, pin 13 is connected to one end of resistor EMI3, pin 15 is connected to one end of capacitor C57, the negative electrode of polar capacitor E17 and VO-, pin 16 is connected to the other end of capacitor C57, the positive electrode of polar capacitor E17 and VO5, the other end of the resistor EMI4 is connected to pin 2 of transient voltage suppressor TVS1, one end of resistor wire R49 and the pin of socket CN2 6, the other end of the resistor EMI3 is connected to pin 1 of the transient voltage suppressor TVS1, the other end of the resistor wire R49 and pin 5 of the socket CN2; pins 1-2 of the socket CN2 are connected to pin 1 of the transformer TLT1, pins 3-4 are connected to pin 3 of the transformer TLT1, and pins 2 and 4 of the transformer TLT1 are connected to VO+ and VO- respectively; pin 1 of the chip U24 is connected to one end of the capacitor C76, the positive electrode of the polar capacitor E32, and pins 2 and 4 of the regulator WY6, pins 2-3 are connected to RX2 and TX2 respectively, pin 4 is connected to VO-, pin 5 is grounded, and pins 6-7 are connected to U0_RX and U0_TX respectively , pin 8 is connected to the 3.3V power supply; pin 1 of the voltage regulator WY6 is connected to the other end of the capacitor C76, the negative electrode of the polar capacitor E31-E32 and VO-, and pin 3 is connected to the positive electrode of the polar capacitor E31, pin 2 of the transformer TLT3 and VO+; pin 1 of the transformer TLT3 is connected to pins 1-2 of the socket CN4, pin 3 is connected to pins 7-8 of the socket CN4, and pin 4 is connected to VO-; pin 4 of the socket CN4 is connected to one end of the resistor EMI5, pin 5 is connected to one end of the resistor EMI6, and the other ends of the resistors EMI5-EMI6 are connected to TX2 and RX2 respectively; pin 1 of the chip U26 is connected to VO5, pin 2 is connected to TX3 is connected to one end of the resistor EMI1, pin 3 is connected to RX3 and one end of the resistor EMI2, pin 4 is connected to VO-, pin 5 is connected to one end of the capacitor C75 and grounded, pins 6-7 are connected to U3_RX and U3_TX respectively, pin 8 is connected to the other end of the capacitor C75 and a 3.3V power supply; pin 1 of the socket CN3 is connected to VO+, pin 2 is connected to pin 1 of the transformer TLT2, pin 3 is connected to pin 3 of the transformer TLT2, pin 4 is connected to the other end of the resistor EMI1, pin 5 is connected to the other end of the resistor EMI2, pins 2 and 4 of the transformer TLT2 are connected to an 8V power supply and VO- respectively; pins 1 and 3 of the chip U16.3V power supply connection, pins 3-6, 11-14 are connected to ENVBUS, RF, ENRF1, RFN, RFN1, ENRF2, RF1, EN_VB respectively, pins 2, 8, 9, 15 are all grounded, and pin 16 is connected to V5; pin 1 of the chip U29 is connected to VO5, pin 2 is connected to one end of the resistor R85, pin 3 is connected to one end of the capacitor C77 and then grounded, pin 4 is connected to one end of the resistor R86 and TB_INT, the other end of the resistor R85 is connected to pin 1 of the socket CN8 and one end of the capacitor C79, The other end of the capacitor C79 and the pin 2 of the socket CN8 are both connected to VO-, and the other end of the resistor R86 is connected to the 3.3V power supply; the pin 1 of the socket CN5 is grounded, the pins 2-3 are respectively connected to SWCLK and SWDIO, and the pin 4 is connected to the 3.3V power supply; the pins 2-4 of the chip U14 are all grounded, the pin 5 is connected to I2C2SDA and one end of the resistor R48, the pin 6 is connected to I2C2SCL and one end of the resistor R47, the pin 7 is connected to WP, and the pin 8 is connected to the other end of the resistors R47-R48 and the 3.3V power supply. .

8. The medical radio frequency circuit according to claim 1, characterized in that: The circuit in the programmable clock module includes a chip U11, a crystal oscillator Y1, resistors R75-R76, a capacitor JC and a capacitor C87; pin 2 of the chip U11 is connected to pin 3 of the crystal oscillator Y1 and one end of the diode JC, pin 3 is connected to pin 1 of the crystal oscillator Y1 and one end of the capacitor C87, pin 4 is connected to one end of the resistor R76 and I2C1SCL, pin 5 is connected to one end of the resistor R75 and I2C1SDA, pin 8 is grounded, pins 1 and 7 are connected to a 3.3V power supply, and pins 9-10 are connected to RFN and RF respectively; the other end of the capacitor JC, the other end of the capacitor C87 and pins 2 and 4 of the crystal oscillator Y1 are all grounded; the other end of the resistors R75-R76 is connected to a 3.3V power supply.

9. The medical radio frequency circuit according to claim 1, characterized in that: The main control module is also connected to the communication interface for data transmission.