CN210144737U

CN210144737U - High frequency surgical system

Info

Publication number: CN210144737U
Application number: CN201721722323.7U
Authority: CN
Inventors: 焦海军; 胡伟九; 张大宏; 冯泽荣; 林忠
Original assignee: Hangzhou Dedao Medical Equipment Co
Current assignee: Hangzhou Dedao Medical Equipment Co
Priority date: 2017-12-12
Filing date: 2017-12-12
Publication date: 2020-03-17
Anticipated expiration: 2027-12-12

Abstract

The utility model discloses a high-frequency operation system, which comprises an operation electrode, an electrode identification unit, a control unit, a pedal signal input unit, an overcurrent protection unit, an analog quantity isolation output unit, a logic unit, a radio frequency power amplification unit and an output switching unit which are connected in sequence; the operation electrode is connected with the electrode identification unit, and the outputs of the electrode identification unit, the overcurrent protection unit and the pedal signal input unit are all connected with the input of the control unit; the analog quantity isolation output unit is connected with the control unit, the output end of the analog quantity isolation output unit is connected with an adjustable switching power supply, and the output end of the adjustable switching power supply is connected with the input end of the radio frequency power amplification unit; the logic unit is connected with the output end of the control unit; the output end of the radio frequency power amplification unit is connected with the control unit; the control end of the output switching unit is connected with the control unit. The utility model discloses a plasma electricity surely congeals function and bipolar electricity surely congeals the function, and the circuit is simple, the dependable performance.

Description

High frequency surgical system

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to high frequency operation system.

Background

Since the eighties of the twentieth century, minimally invasive surgery, represented by laparoscope, is one of the important advances in the field of surgery, and is popular because of its small local trauma, light stress response on the whole body, light pain for patients, quick recovery, and achievement of open surgery. Laparoscopic surgery is performed in many departments such as general surgery, urology surgery, gynecology and the like, and comprises laparoscopic liver resection, splenectomy, nephrectomy, kidney resection, adrenal resection, hysterectomy and radical treatment of malignant tumors of some organs besides conventional laparoscopic surgery. With the development of medical technology and instruments, the application range of laparoscopic surgery will be further expanded, and minimally invasive treatment represents the development direction of surgical operations.

In surgical operations, high-frequency electric knives are always indispensable, and generally, high-frequency electric knives are classified into conventional monopolar high-frequency electric knives, bipolar high-frequency electric knives, and plasma high-frequency electric knives. In the past, a high-frequency electric knife generally only comprises one function, and with the development of electrosurgery, a multifunctional electric knife which combines a monopolar electric knife, a bipolar electric knife and a plasma electric knife into one device is developed, but the prior multifunctional electric knife has the following defects:

(1) some multifunctional electric knives include monopolar electrocoagulation, plasma electrocoagulation, bipolar electrocoagulation, but lack the bipolar cutting function that is more and more widely used at present. Taking the SP super pulse plasma system of Jie Shai Shi corporation, England as an example, the electric knife has perfect plasma electric cutting electric coagulation function and bipolar electric coagulation function, but does not have bipolar electric cutting function.

(2) The cutting and coagulation power of the bipolar high-frequency electrotome is small, and the cutting and coagulation speed is influenced. Taking the UES-40 electrotome of Orinbas as an example, the power of bipolar electrotomy is only 90W, and the maximum power of bipolar coagulation is only 90W.

(3) Bipolar cutting coagulation has only one output port; in the electrosurgical operation under the endoscope, a doctor respectively holds a bipolar electrode by the left hand and the right hand, only one of the two bipolar electrodes can cut and coagulate blood, and the doctor needs to coagulate the electrode by using a pair of forceps and then keep the electrode in a clamping state, and the other forceps perform cutting operation, but the current multifunctional electrotome cannot realize the operation.

(4) Does not include the plasma electrotome function; due to the complexity of the plasma electrotome technology implementation, only a portion of the electrotome includes the plasma electrotome function.

(5) The circuit is complex; in order to realize the plasma electro-cutting electro-coagulation function and the bipolar electro-coagulation function, the SP super-pulse plasma system of the UK Jie Shai company uses two radio frequency power amplification circuits, one power amplifier is used for plasma cutting, and the other power amplifier is used for plasma electro-coagulation and bipolar electro-coagulation;

in electrosurgery, since the electrode electrotome has large thermal damage and smoke generation during cutting, and since high-frequency current flows through the human body during operation, there is a risk of burning human tissues, and in clinic, such medical accidents often occur, and therefore, hospital systems have begun to slowly reduce the use of monopolar electrotomes.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a high frequency operation system has realized plasma electrotomy electrocoagulation function and bipolar electrotomy electrocoagulation function, and the circuit is simple, the dependable performance.

Realize above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:

a high-frequency operation system comprises an operation electrode, an electrode identification unit, a control unit, a pedal signal input unit, an analog quantity isolation output unit, a logic unit, a radio frequency power amplifier unit and an output switching unit, wherein the logic unit, the radio frequency power amplifier unit and the output switching unit are sequentially connected;

the operation electrode is connected with the input end of the electrode identification unit, and the output end of the electrode identification unit is connected with the input end of the control unit;

the output end of the pedal signal input unit is connected with the input end of the control unit, and pedal signals are sent to the control unit;

the input end of the analog quantity isolation output unit is connected with the output end of the control unit, the output end of the analog quantity isolation output unit is connected with an adjustable switch power supply, and the output end of the adjustable switch power supply is connected with the input end of the radio frequency power amplification unit;

the input end of the logic unit is connected with the output end of the control unit and outputs two paths of complementary pulse signals; the output end of the radio frequency power amplification unit is also connected with the input end of the control unit, and outputs a voltage/current feedback signal to the control unit; the control end of the output switching unit is connected with the output end of the control unit, and the output end of the output switching unit is connected with the operation electrode.

Further, the control unit comprises a first singlechip U1, a voltage feedback conditioning circuit, a current feedback conditioning circuit, a first digital-to-analog converter U2 and an audio power amplifier U6;

the voltage feedback conditioning circuit comprises a full-bridge rectifying circuit, a current-limiting resistor, a clamping circuit, a double-operational amplifier, a low-pass filter circuit and a first magnetic bead FB1 which are sequentially connected, and the output end of the first magnetic bead FB1 is connected with the analog input port of a first singlechip U1;

the current feedback conditioning circuit and the voltage feedback conditioning circuit have the same structure;

the analog quantity output end of the first digital-to-analog converter U2 is connected with the volume control input end of the audio power amplifier U6, the audio input port of the audio power amplifier U6 is connected with the first single chip microcomputer U1, and the loudspeaker output port of the audio power amplifier U6 is connected with a loudspeaker.

Further, the control unit further comprises a first storage U10 and a second storage U11, and the first storage U10 and the second storage U11 are mutually communicated with the first single chip microcomputer U1 through an IIC bus and used for storing system parameters.

Further, the logic unit includes a three-input nand gate and a first D flip-flop connected to each other, and receives the output signal of the control unit and outputs two paths of complementary signals.

Further, the radio frequency power amplifier unit comprises a first driving chip U32, a second driving chip U33, a third driving chip U34, a fourth driving chip U35, a fifth driving chip U36, a sixth driving chip U37, a seventh driving chip U38, and an eighth driving chip U39;

one path of complementary signals output by the logic unit are input into a second driving chip U33, a third driving chip U34, a fifth driving chip U36 and an eighth driving chip U39, and the other path of complementary signals output by the logic unit are input into a first driving chip U32, a fourth driving chip U35, a sixth driving chip U37 and a seventh driving chip U38; the output ends of the second driving chip U33 and the fourth driving chip U35 are connected to the two primary ends of a second driving transformer TD 2; the output ends of the third driving chip U34 and the fifth driving chip U36 are connected to the two primary ends of the first driving transformer TD 1; the output ends of the sixth driving chip U37 and the eighth driving chip U39 are connected to the two primary ends of the fourth driving transformer TD 4; the output ends of the fifth driving chip U36 and the seventh driving chip U38 are connected to the two primary ends of the third driving transformer TD 3; the output ends of the first driving transformer TD1, the second driving transformer TD2, the third driving transformer TD3 and the fourth driving transformer TD4 are connected to a current and voltage collecting circuit, and the output end of the current and voltage collecting circuit is connected to a voltage feedback conditioning circuit and a current feedback conditioning circuit in the control unit respectively.

Further, the current and voltage acquisition circuit comprises a full-bridge driving circuit;

one power output end of the full-bridge driving circuit is connected with a 1 st pin of a work mode inductor T2, a 2 nd pin of the work mode inductor T2 is connected with a resonant capacitor C102, a resonant inductor L3 is connected with the resonant capacitor C102 in series, then the 3 rd pin of the work mode inductor T2 is connected, and finally the 1 st pin and the 2 nd pin of a high-frequency transformer T1 are connected;

the other power output end of the full-bridge drive is connected with the 8 th pin and the 9 th pin of the high-frequency transformer T1;

the 10 th and 11 th pins of the high-frequency transformer T1 are connected with an output inductor L2, the secondary side of the high-frequency transformer T1 is connected with a voltage acquisition circuit and a current acquisition circuit in parallel, and the output ends of the voltage acquisition circuit and the current acquisition circuit are respectively connected with the input ends of a voltage feedback conditioning circuit and a current feedback conditioning circuit in the control unit;

and the secondary output end of the high-frequency transformer T1 is also connected with the input end of the input switching unit, and the output high-frequency alternating voltage is sent to the output switching unit.

Further, the output switching unit includes a relay K2, a relay K3, a relay K4, a relay K5, a relay K6, a relay K7; the relay K2 and the relay K3 are used for controlling output bipolar electrotomy electrocoagulation, and P7 is a corresponding output socket; relays K4 and K5 are used to control output bipolar electrocoagulation, with P7 being its corresponding output socket; relays K6 and K7 are used to control output bipolar electrocoagulation, with P9 being its corresponding output socket; the three groups of relay arrays form an output switching module which is respectively connected with the control unit, and the control unit controls the high-frequency energy output by the high-frequency transformer T1 to be output by which relay array.

Further, the overcurrent protection unit comprises a current transformer S3, the current transformer S3 is connected in series between the 8 th pin and the 9 th pin of the high-frequency transformer T1, the output end of the current transformer S3 is connected with the input end of a full-bridge rectifier circuit, the output end of the full-bridge rectifier circuit is connected in sequence with a current-limiting resistor R116, a clamping circuit, a dual operational amplifier, a low-pass filter circuit and a magnetic bead FB11, the output end of the magnetic bead FB11 is connected with a comparator U31A and is connected with the non-inverting input end of the comparator U31A, the inverting input end of the comparator U31A is connected with a variable resistor W1, the variable resistor W1 divides a reference voltage source output by the voltage source for comparison with the current collected by the overcurrent collection circuit, when the voltage collected by the overcurrent collection circuit exceeds the voltage input to the inverting input end of the U31A, the 1 st pin of the U31A outputs a high level, the MOS transistor Q1 is driven to be conducted through the gate resistor R84 and the gate pull-down resistor R86, the conduction of the MOS transistor Q1 enables the monostable trigger circuit to be triggered, the trigger signal is high level and is finally sent into the logic unit, the complementary signal output is cut off, and finally the high-frequency operation system stops outputting power.

Further, the electrode identification unit comprises a second single chip microcomputer chip U45, a tenth transformer driving chip U46, an eleventh transformer driving chip U47, a fifth driving transformer TD5, a sixth driving transformer TD6, a seventh driving transformer TD7, a rectifying circuit, a relay K8, an energy storage capacitor C133, a resistor R143, an electrode type marking capacitor C132 and a current conditioning circuit;

the second singlechip chip U45 generates a first driving signal with a dead zone to drive an eleventh transformer driving chip U47, the eleventh transformer driving chip U47 pushes the primary side of a seventh driving transformer TD7, an alternating current voltage is generated on the secondary side of the seventh driving transformer TD7, the alternating current voltage is rectified by a rectifying circuit and then stored by an energy storage capacitor C143, when the voltage at the two ends of the energy storage capacitor C143 reaches a set threshold value, a driving relay K8 is closed, and after a relay K8 is closed, a capacitor C132 for marking the type of an electrode is merged into the two ends of an energy storage capacitor C133;

the second monolithic chip U45 generates a second driving signal with a dead zone to drive the transformer driving chip U46, the tenth transformer driving chip U46 pushes the primary side of the sixth driving transformer TD6 to generate an ac voltage on the secondary side of the sixth driving transformer TD6, the ac voltage generated by the ac voltage passes through the secondary side of the fifth driving transformer TD5, the resistor R143, the energy storage capacitor C133 and the capacitor C132 indicating the type of the electrode form a loop together, and the current generated by the secondary side of the fifth driving transformer TD5 passes through the current conditioning circuit and then is sent to the second monolithic chip U45.

Further, the analog quantity isolation output unit comprises a first high-speed optical coupler U18, a second high-speed optical coupler U24, a second digital-to-analog converter U23 and a high-speed operational amplifier U19; the input ends of the first high-speed optical coupler U18 and the second high-speed optical coupler U24 are connected with the output end of the control unit, the output ends of the first high-speed optical coupler U18 and the second high-speed optical coupler U24 are respectively connected with the input end of a second digital-to-analog converter U23, and the output end of the second digital-to-analog converter U23 is sequentially connected with a high-speed operational amplifier U19, a resistor R50 and a magnetic; and the output end of the magnetic bead FB5 is connected with the input end of the adjustable switching power supply.

The utility model has the advantages that:

(1) simultaneously has the functions of bipolar electrotomy electrocoagulation and plasma electrotomy electrocoagulation output.

(2) The bipolar electrotomy electrocoagulation has a double-output function, one output can output bipolar electrotomy and bipolar electrocoagulation, and the other output can output bipolar electrocoagulation.

(3) The EMC performance is excellent. As the radio frequency power amplifier adopts the zero current soft switch technology, compared with the radio frequency electrotome adopting the hard switch radio frequency power amplifier, the zero current soft switch has no current flowing through the power tube at the moment of switching the power tube, and the power tube in the hard switch radio frequency power amplifier has current at the moment of switching the power tube, so that the electromagnetic interference generated by switching the power tube without the current flowing through is very small, therefore, the electromagnetic interference of the invention is very low, the interference to other equipment in an operating room is small, and the safety of the operation is improved.

(4) The conversion efficiency is high. The radio frequency power amplifier adopts a zero current soft switching technology, and no current flows through the power tube at the moment of switching, so that the energy consumed on the power tube is little, and the energy conversion efficiency is high and can generally reach more than 90%.

Drawings

FIG. 1 is a schematic view of an overall configuration of a high frequency surgical system according to an embodiment of the present invention;

FIG. 2-1 is a circuit diagram of the single chip microcomputer chip U1;

FIG. 2-2 is a circuit diagram of a reference voltage source U5;

2-3 are circuit diagrams of reference voltage source U5;

FIGS. 2-4 are circuit diagrams of voltage feedback conditioning circuits;

FIGS. 2-5 are circuit diagrams of current feedback conditioning circuits;

FIGS. 2-6 are circuit diagrams of the digital to analog converter U2;

fig. 2-7 are circuit diagrams of an audio power amplifier U6;

2-8 are peripheral clock circuit diagrams of the single chip microcomputer chip U1;

fig. 2-9 are reset circuit diagrams of the single chip microcomputer chip U1;

FIGS. 2-10 are diagrams of a start selection circuit of the single chip microcomputer chip U1;

FIGS. 2-11 are download circuit diagrams of the single chip microcomputer chip U1;

FIGS. 2-12 are circuit diagrams of memory U10;

FIGS. 2-13 are circuit diagrams of memory U11;

FIG. 3-1 is a circuit diagram of a level shifter chip U13;

FIG. 3-2 is a circuit diagram of the level shifting chip U15;

3-3 are circuit diagrams of the level shifter chip U17;

fig. 3-4 are circuit diagrams of the connector DB 1;

FIG. 4-1 is a circuit diagram of an analog isolation output unit;

4-2 Circuit diagram of reference Voltage Source U25;

FIGS. 4-3 are circuit diagrams of the pedaling signal input unit;

FIGS. 4-4 are schematic circuit diagrams of display screens;

FIGS. 4-5 are circuit diagrams of the isolated power module M3;

FIG. 5-1 is a circuit diagram of a logic cell;

FIG. 5-2 is one of the circuit diagrams of the over-current protection unit;

5-3 are schematic diagrams of the circuit connection relationship between the driving chips U33, U35 and the driving transformer TD 2;

5-4 are schematic diagrams of the circuit connection relationship between the driving chips U37, U39 and the driving transformer TD 4;

5-5 are schematic diagrams of the circuit connection relationship between the driving chips U32, U34 and the driving transformer TD 1;

5-6 are schematic diagrams of the circuit connection relationship between the driving chips U36, U38 and the driving transformer TD 3;

FIG. 6-1 is a circuit diagram of a full bridge driving circuit in the RF power amplifier unit;

FIG. 6-2 is a circuit diagram of a voltage current acquisition unit in the RF power amplifier unit;

FIG. 6-3 is a second circuit diagram of the over-current protection unit;

FIGS. 6-4 are circuit diagrams of output switching units;

FIGS. 6-5 are circuit diagrams of Darlington driver chips;

FIG. 7-1 is a circuit diagram of the single-chip microcomputer U45 in the electrode recognition unit;

FIG. 7-2 is one of the circuit diagrams of the motor electrode identification unit;

FIG. 7-3 is a second circuit diagram of the motor electrode identification unit

Fig. 7-4 are circuit diagrams of the connector DB 4;

7-5 are circuit diagrams of voltage reference source U41;

FIG. 8-1 is a third circuit diagram of a motor electrode identification unit;

FIG. 8-2 is a fourth circuit diagram of the motor electrode identification unit;

fig. 8-3 are circuit diagrams of darlington chip U49.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following description is made in detail for the application of the principles of the present invention with reference to the accompanying drawings.

As shown in fig. 1, a high-frequency surgical system comprises a surgical electrode, an electrode identification unit, a control unit, a pedal signal input unit, an analog quantity isolation output unit, a logic unit, a radio frequency power amplification unit and an output switching unit which are sequentially connected;

as shown in fig. 2-1 to 3-4, the control unit includes a reference voltage source U5, a reference voltage source U8, a power chip U7, a single chip microcomputer U1, a voltage feedback conditioning circuit, a current feedback conditioning circuit, a digital-to-analog converter U2, an audio power amplifier U6, a memory U10, a memory U11, a level conversion chip U13, a level conversion chip U15, a level conversion chip U17, a connector DB1, and a single chip microcomputer peripheral circuit.

The reference voltage source U5 is REF3133, the power input end of the reference voltage source U5 is connected with a 5V power supply, the reference voltage output end of the reference voltage source U5 is connected with the reference voltage source input end of the singlechip U1, and the model of the singlechip U1 is STM32F103RCT 6; the power supply chip U7 is LM1117-3.3, the point voltage output end is connected with the power supply input ends of the singlechip U1, the memorizer U10 and the memorizer U11, and the model of the memorizer U10 and the memorizer U11 is AT24C 32; the reference voltage source U8 is REF02, the power input end of which is connected with a 12V power supply, and the reference voltage output end is connected with the power input end of the digital-to-analog converter U2.

The model of the digital-to-analog converter U2 is DAC7512, the analog quantity output end of the digital-to-analog converter U2 is connected with the volume control input end (4 th pin) of an audio power amplifier U6, the audio input end (2 nd pin) of the audio power amplifier U6 is connected with a PB10 (29 th pin) of a singlechip U1 through a capacitor C7 and a resistor R9, an indirect capacitor C6 between the 6 th pin of the audio power amplifier U6 and a ground 7 pin has a capacitance value of generally 10uF, the speaker output port of the audio power amplifier U6 is connected with a speaker, and the model of the audio power amplifier U6 is LM 4865M; the models of the level conversion chips U13, U15 and U17 are SN74LVC4245 DW; the audio output function in the control unit is that the singlechip U1 controls the digital-to-analog conversion chip U2 to output different analog quantities to the audio power amplifier U6 through a three-wire SPI communication mode to control the volume of the warning tone, the PB6 of the singlechip U1 outputs pulses with different frequencies to control the tone of the warning tone, and the R6 and the C7 are used for isolating direct-current signals.

The peripheral circuit of the single chip microcomputer of the control unit comprises a decoupling circuit formed by C14, C18, C19, C20, C21 and C22, a clock circuit formed by Y1, C11, C13 and R14, a reset circuit formed by R12, TRST1, C12 and R13, a download circuit formed by connectors SWD1, R15, R17 and R18, and a start selection circuit formed by BOOT1 and R16.

The input signal of the voltage feedback conditioning circuit in the control unit is a current signal and is used for converting the output feedback voltage in the current form into a voltage signal; d2, D3, D7 and D8 of the model number 1N4148 form a full-bridge rectification circuit, an input alternating current signal is converted into a direct current signal, R29 is used for converting the direct current signal into a direct current voltage signal, the resistance value of the full-bridge rectification circuit can be 51 ohms, R19 is used for limiting current, and the resistance value of the full-bridge rectification circuit can be 100K; the main functions of the D1 and D5 with the model number of 1N4148 are input protection and the voltage input into U4 is prevented from being overhigh; u4 model LM358, wherein U4A is an emitter follower, the voltage input from U4A pin 3 is equal to the voltage output from U4A pin 1, the main function is impedance matching; the voltage signal output from the 1 st pin of U4A enters the 5 th pin of U4B through voltage division by R30 and R31 and filtering by C26, wherein the resistance of R30 is 2K, the resistance of R31 is 6.8K, the resistance of C26 can be 0.1uF, the circuit of U4B is IN the form of a non-inverting amplifier, R27 and R22 control the amplification factor, C23 is used for adjusting the ac zero point of the operational amplifier, the resistances of R27 and R22 are both 10K, the capacitance of C23 is 0.01uF, the voltage division circuit formed by R30 and the amplification circuit formed by U4 30 are IN the range that the analog input port of the single chip microcomputer U30 can collect IN order to conveniently condition the voltage feedback signal, the voltage signal output from U4 30 passes through the low-pass filter circuit formed by R30 and C30, the resistance of R30 is 1K, the capacitance of C30 f passes through the magnetic bead, the analog input port enters the single chip microcomputer 413672, and finally the analog clamp circuit enters the single chip microcomputer 413672D and the high-frequency interference circuit.

An input signal of a current feedback conditioning circuit in the control unit is a current signal and is used for converting output feedback current in a current form into a voltage signal; d11, D12, D15 and D16 of the model number 1N4148 form a full-bridge rectification circuit, an input alternating current signal is converted into a direct current signal, R40 is used for converting the direct current signal into a direct current voltage signal, the resistance value of the full-bridge rectification circuit can be 51 ohms, R32 is used for limiting current, and the resistance value of the full-bridge rectification circuit can be 100K; the main functions of the D9 and D13 with the model number of 1N4148 are input protection and the voltage input into U3 is prevented from being overhigh; u3 model LM358, wherein U3A is an emitter follower, the voltage input from U3A pin 3 is equal to the voltage output from U3A pin 1, the main function is impedance matching; the voltage signal output from the 1 st pin of U3A enters the 5 th pin of U3B through voltage division by R43 and R44 and filtering by C32, wherein the resistance of R43 is 2K, the resistance of R44 is 6.8K, the resistance of C32 can be 0.1uF, the circuit of U3B is IN the form of a non-inverting amplifier, R36 and R33 control the amplification factor, C27 is used for adjusting the ac zero point of the operational amplifier, the resistances of R36 and R33 are both 10K, the capacitance of C27 is 0.01uF, the voltage division circuit formed by R43 and the amplification circuit formed by U3 43 are IN the range that the analog input port of the single chip microcomputer U43 can collect IN order to conveniently condition the voltage feedback signal, the voltage signal output from U4 43 passes through the low-pass filter circuit formed by R43 and C43, the resistance of R43 is 1K, the capacitance of C43 is 0.01uF, the high-frequency interference signal enters the single chip microcomputer 413672, and finally enters the analog clamp 43D and the single chip microcomputer 43.

And a memory U10 and a memory U11 in the control unit are mutually communicated with the singlechip U1 through an IIC bus and are used for storing system parameters.

The level conversion chips U13, U15, and U17 mainly function to convert the 5V digital signal level input to the control unit into a 3.3V digital signal level, and convert the output 3.3V digital signal level into a 5V digital signal level, and these input and output signal levels are respectively used for controlling the rf power amplifier unit, receiving the signal input by the foot pedal signal input unit (i.e., foot pedal switch), and communicating with the electrode identification unit.

And the physical interface of the control unit, the isolation analog quantity output unit, the logic unit, the radio frequency power amplification unit, the output switching unit, the overcurrent protection unit and the electrode identification unit is a connector DB 1.

As shown in fig. 5-1, the logic unit is composed of U12 (including U12A, U12B, U12C, U12D) with model SN74HC132, U14 (including U14A, U14B, U14C, U14D) and U16A with model 74HC74, and its main function is to input the 345KHZ high-frequency signal generated by the control unit to the 12 th and 13 th pins of U14D, and finally generate two complementary pulse signals at the 6 th pin of U12B and the 11 th pin of U12D; c68 is input high-frequency signal filtering, the capacitance value is 51pF, R79 is a pull-down resistor, and the resistance value is 10K; the input signal of the pin 1 of the U14A is an overcurrent protection enable end, and is controlled by a signal sent by the control unit, the default enable is performed, when the overcurrent protection enable end is enabled, and when the pin 2 of the U14A inputs an overcurrent signal with a high level, the pin 6 of the U12B and the pin 11 of the U12D do not output complementary pulse signals any more, and the pin 4 of the U14B is a high-frequency signal carrier frequency input end. In the logic unit, U14A and U14B form a three-input nand gate, and the combined nand gate finally outputs the 6 th pin of U14B, is connected to the 2 nd pin of U16A, and finally is used for controlling whether the 6 th pin of U12B and the 11 th pin of U12D generate two complementary pulse signals. The specific working process of the logic unit is as follows: the high-frequency signal passes through an inverter consisting of U14D, and an inverted signal output from the 11 th pin of U14D is input into three places, namely, the 3 rd pin of a D flip-flop U16, the inverter consisting of U14C and the 9 th pin of U12C; after the inversion of the U14C, the signal of the 1 st pin finally accessed to the U12A is complementary to the signal of the 10 th pin accessed to the U12C; due to the delay of the gate circuit, the signal of the pin 1 of the U12A is not aligned in time sequence with the complementary signal of the pin 10 of the U12C, the signal input to the pin 3 of the U16A passes through the flip-flop U16A, then the output signal of the pin 6 of the U16A is simultaneously connected to the pin 1 of the U12A and the pin 9 of the U12C, and the finally output complementary signals are aligned strictly through the synchronization of the D flip-flop U16A.

And the two paths of complementary signals generated by the logic unit can be input into the radio frequency power amplification unit. Specifically, as shown in fig. 5-3 to 5-6, the radio frequency power amplifier unit includes U32, U33, U34, U35, U36, U37, U38, and U39 driver chips with a type of MIC4452, wherein one path of complementary signals is input to U33, U34, U36, and U39, and the other path of complementary signals is input to U32, U35, U37, and U38; as shown in fig. 5, the 2 nd pin of the MIC4452 is a signal input pin, and an RC low-pass filter circuit with the same specification is arranged before each signal input pin of the MIC4452, taking U32 as an example, the R88 resistance is 100 ohms, and the C78 is 51 pF; each two MIC4452 drive one driving transformer, the type of the driving transformer is 86T-451DNL, a current limiting resistor for limiting current and a capacitor for preventing the driving transformer from magnetic saturation are arranged between the output end of the two MIC4452 and the input end of the driving transformer, taking TD1 as an example, the current limiting resistor is R89, the resistance value is1 ohm, and the capacitor for preventing the driving transformer from magnetic saturation is C80, and the capacitance value is1 uF.

In the radio frequency power amplifier unit, the output ends of the driving transformers TD1, TD2, TD3 and TD4 are connected to a full-bridge driving circuit (as shown in fig. 6-1) composed of 4 NMOS; the full-bridge driving circuit consists of Q2, Q3, Q4 and Q5 with the model number of IRF580, wherein Q3 is an upper left bridge wall, Q2 is an upper right bridge wall, Q4 is a lower left bridge arm, and Q5 is an effective bridge arm; and a peripheral circuit of each bridge arm is composed of a grid driving resistor, a grid protection TVS tube and a drain-source protection voltage stabilizing diode. Taking the upper left bridge arm Q3 as an example, R99, R100 and R101 with the resistance value of 3.3 ohms are connected in series to form a gate drive resistor, D17 with the model number of 1N5386B is a drain source protection zener diode, and D20 with the model number of 1.5KE15CA is a gate protection TVS; the purpose of connecting 3 resistors in series is to increase the total load power of the grid resistor and prevent the grid resistor from being burnt out due to overheating; in the full-bridge driving circuit, all of C103, C104, C105, C106, C107 and C108 are filter capacitors, the resistance values of C103, C104, C107 and C108 are 1uF, and the resistance values of C105 and C106 are 2.2 uF.

In the radio frequency power amplifier unit, one power output end of a full-bridge driving circuit is connected with a 1 st pin of a work-mode inductor T2, a 2 nd pin of the T2 is connected with a resonant capacitor C102, a resonant inductor L3 is connected with the resonant capacitor C102 in series, then a 3 rd pin of a T2 is connected to be finally connected with a 1 st pin and a 2 nd pin of a high-frequency transformer T1, and the other power output end of the full-bridge driving circuit is connected with 8 th pin and 9 th pin of a high-frequency transformer T1 (the middle part of the full-bridge driving circuit is connected with a; the capacitance value of the resonant capacitor C102 is 22nF, and the inductance value of the resonant inductor L3 is 8.5 uH; therefore, the full-bridge driving circuit, the I-mode inductor T2, the resonant capacitor C102, the resonant inductor L3 and the high-frequency transformer T1 form an LLC soft switch; the pins 10 and 11 of the high-frequency transformer T1 are connected with an output inductor L2, an inductor L2 is an output energy storage inductor, the inductance of the output energy storage inductor is 4.7uH, the functions of C101 and C112 are used for blocking direct current, the capacitance value of C101 is 100nF, the capacitance value of C112 is 68nF, C109, C110, C111 and C113 and a current transformer S2 form an output voltage acquisition circuit, the capacitance values of C109, C110, C111 and C113 are 4.7nF, signals output by the current transformer S2 are current signals and are finally sent to a voltage feedback conditioning circuit of a control unit, the current transformer S1 acquires output current, signals output by the current transformer S1 are current signals and are finally sent to the current feedback conditioning circuit of the control unit. Signals of the current transformers S1 and S2 are FIS115NL, a relay K1 is used for discharging C109, C110, C111 and C113 to prevent energy remaining in a capacitor from generating electric shock hazard when power is not output, and the model K1 is HF115F-012-1ZS 3; finally, the high-frequency ac voltage output from the secondary side of the high-frequency transformer T1 is sent to the input switching module.

As shown in fig. 6-4, the output switching unit is composed of relays K2, K3, K4, K5, K6 and K7, the models of K2, K3, K4, K5, K6 and K7 are all CRCTHV-14KV-a, which is a high-voltage relay with withstand voltage up to 14 KV; relays K2 and K3 are used to control the output bipolar electrocoagulation, and P7 is its corresponding output socket; relays K4 and K5 are used to control output bipolar electrocoagulation, P7 is its corresponding output socket; relays K6 and K7 are used to control output bipolar electrocoagulation, P9 is its corresponding output socket; the three groups of relay arrays form an output switching unit, and the control unit can flexibly control the high-frequency energy to be output by the relay array.

As shown in fig. 6-5, U40 is a darlington driving chip, which is a ULN2803 type, and is used to drive the relays K1, K2, K3, K4, K5, K6, and K7 to open and close, and the control signals of the relays are output by the control unit.

The model of a current transformer S3 in the radio frequency power amplification unit is FIS115NL which is a part of an overcurrent protection module (used for collecting the current of the primary side of a transformer T1, the current is used as overcurrent protection after being processed), a current signal output by S3 is input into a full-bridge rectification circuit formed by D26, D27, D29 and D30, the models of D26, D27, D29 and D30 are 1N4148, the full-bridge rectification circuit converts an input alternating current signal into a direct current signal, R116 is used for converting the direct current signal into a direct current voltage signal, the resistance value of the direct current signal can be 51 ohms, R112 is used for limiting current, and the resistance value can be 100K; the main functions of the D25 and D28 with the model number of 1N4148 are input protection and the voltage input into U20 is prevented from being overhigh; u20 model LM358, wherein U20A is an emitter follower, the voltage input from U20A pin 3 is equal to the voltage output from U20A pin 1, the main function is impedance matching; the voltage signal output from the 1 st pin of U20A enters the 5 th pin of U20B through voltage division by R117 and R118 and filtering by C117, wherein the resistance of R117 is 2K, the resistance of R118 is 6.8K, the resistance of C117 can be 0.1uF, the U20B circuit is in the form of a non-inverting amplifier, R113 and R114 control the amplification factor, C114 is used to adjust the ac zero point of the operational amplifier, the resistances of R113 and R114 are both 10K, the capacitance of C114 is 0.01uF, the voltage signal output from the 7 th pin of U20B passes through the low-pass filter circuit formed by R115 and C116, the resistance of R116 is 1K, the capacitance of C116 is 0.01uF, then FB 45 filters out high-frequency interference, the voltage signal enters the non-inverting input terminal of U31A, the model of U31A is LM393, the inverting input terminal of U31A is connected to a variable resistor W2 with a resistance of 20K 3523K, the variable resistor W3523 outputs a voltage source 733 for collecting the overcurrent voltage when the overcurrent voltage signal and the voltage signal is compared with the collecting voltage source 4934, when the overcurrent voltage collecting voltage source, the voltage source for collecting the output to the inverting input terminal of the collecting, the 1 st pin of the U31A will output high level, the MOS transistor Q1 is driven to be conducted through the gate resistor R84 and the gate pull-down resistor R86, the model of Q1 is IRLML00400, the conduction of Q1 can trigger a monostable trigger circuit formed by U29, a trigger signal is high level, the trigger signal is finally sent to the 2 nd pin of the logic unit U14A, the complementary signal output is turned off, and finally the system stops outputting power; the model of U29 is 555, and in the monostable trigger circuit that 555 constitutes, R81 and C72 will determine the time that the monostable high level keeps, and R81 recommends to take 100K, and C72 recommends to take 0.1 uF.

The analog quantity isolation output module is used for outputting variable analog quantity and controlling the magnitude of direct current voltage loaded on a full-bridge driving circuit in a radio frequency power amplification unit, the magnitude of the direct current voltage added on the full-bridge driving circuit determines the magnitude of output power, and as shown in figures 4-1-4-7, the analog quantity isolation output module comprises isolation power supply modules M1 and M2, a reference voltage source U25, high-speed optical couplers U18 and U24, a digital-to-analog converter U23 and a high-speed operational amplifier U19; the model of an isolation power supply module M1 is IB1205LS-1W and is used for supplying power to a high-speed optical coupler U18, U24 and a high-speed operational amplifier U19, the model of an isolation power supply module M2 is H1212S-2WR2 and is used for supplying power to a digital-to-analog converter U23, the model of a digital-to-analog converter U23 is DAC7512, analog quantity output by the digital-to-analog converter U23 passes through an emitter follower U19 and then passes through a resistor R50 and magnetic bead FB5, the input analog quantity is used for controlling a 0-180V adjustable switching power supply to output different voltages, the 0-180V voltage is finally loaded into a full bridge driving circuit in a radio frequency power amplification unit, and the model of the 0-180V adjustable switching power supply can be selected from SN-800; the model of U19 is AD8628, the model of U18 and U24 is HCPL-2631, and the function of the device is to transmit control commands sent by a control unit to the digital-to-analog converter U23 to the digital-to-analog converter U23 through photoelectric conversion.

The pedal signal input unit is used for acquiring pedal signals, and in order to be safer, the pedal signals are acquired in an isolated mode; the isolation power supply module M3 is IB1205LS-1W and is used for providing isolation power supply for primary sides of optical couplers U26, U27 and U28, the optical coupler U26 is used for collecting bipolar cutting and plasma cutting pedal signals, the optical coupler U27 is used for collecting bipolar electrocoagulation and plasma electrocoagulation pedal signals, the optical coupler U28 is used for collecting single bipolar electrocoagulation pedal signals, output signals of the optical couplers U26, U27 and U28 are shaped through U9 and finally sent to the control unit, and the U9 is SN74HC 132.

The display screen module unit is composed of a TTL-to-RS 232 communication interface chip composed of U21, and the model number of U21 is MAX 3232. P3 is the touch LCD screen socket, is used for connecting the DC10600B070_05TF _ RTC serial ports screen of Guangzhou large color, and U21 is the connection pivot of control circuit and serial ports screen.

The power supply of 12V is connected to the P11 in FIGS. 8-1-8-3, and a 5V power supply is finally output through the power chip U48, wherein the signal of U48 is TPS5450, and the 5V voltage output by U48 supplies power to the control unit and the electrode identification module. P12 is a power input port of 0-180, D48 is used for preventing current from flowing backwards, the model is RHRP3060, R172 is a discharge resistor, the power is 5W, the resistance value is 6.8K, K9 controls whether a 0-180V adjustable switching power supply is connected to a radio frequency generator, K9 is HF115F-012-1ZS3, L5 is an industrial mode inductor and used for filtering noise in a circuit, F1 is a 6.3A fuse, R171 is a discharge resistor, the power is 5W, the resistance value is 100 ohm, K11 is HF115F-012-1ZS3, the K6380, C159, C160 and C161 electrolytic capacitors with 2200uF are mainly controlled to be incorporated into a loop of 0-180V, in a plasma cutting mode, the plasma cutting instantaneous energy is high, so that the K10 is HF115F-012-1, ZS3 and R167 are used for discharging C160, C158 and C161 together. U49 is Darlington driver chip for driving K9, K10 and K11.

In the electrode identification unit, U45 is a single chip microcomputer, model is STM32F103RCT6, the single chip microcomputer U45 can generate two sets of complementary signals with dead zones and input the complementary signals into transformer driving chips U46 and U47, when the electrodes need to be identified, the single chip microcomputer U45 sends a set of driving signals with dead zones to the driving chip U47, the driving chip U47 pushes the primary side of a transformer TD7, alternating voltage is generated on the secondary side of the transformer TD7, after D35, D36, D37, D38 rectification and C143 energy storage, the voltage at two ends of C143 can reach 12V, then a relay K8 can be driven to be closed, after a relay K8 is closed, a capacitor C132 for marking the type of the electrodes can be merged into two ends of C133, at the moment, the single chip microcomputer U45 generates another set of driving signals with dead zones to push the transformer driving chip U46, the alternating voltage can be generated by the secondary side of the transformer TD6, the alternating current generated by the alternating voltage can pass through the secondary side, r143, C133 and the capacitor C132 which marks the type of the electrode form a loop, different electrode mark capacitor capacities are different, because the capacitor has capacitive reactance under alternating current, different electrode mark capacitors can cause different current sizes in the alternating current loop, the current in the loop passes through the 5 th and 6 th pins of the transformer TD5, and can generate current in the 1 st and 2 nd pins of the transformer TD5, the magnitude of the current can change in a certain functional relation along with the magnitude of the electrode mark capacitor capacity, and the current generated by the 1 st and 2 nd pins of the transformer TD5 is finally sent to the singlechip U45 for collection through the current conditioning circuit; d40, D41, D44 and D45 of the model number 1N4148 form a full-bridge rectification circuit, an input alternating current signal is converted into a direct current signal, R155 is used for converting the direct current signal into a direct current voltage signal, the resistance value of the full-bridge rectification circuit can be 51 ohms, R151 is used for limiting current, and the resistance value of the full-bridge rectification circuit can be 100K; the U22 is LM358, wherein U22A is an emitter follower, the voltage input from U22A No. 3 is equal to the voltage output from U3A No. 1, and the main function is impedance matching; the voltage signal output from the 1 st pin of U3A enters the 5 th pin of U22B through voltage division by R156 and R157 and filtering by C148, wherein the resistance value of R156 is 2K, the resistance value of R157 is 6.8K, the resistance value of C148 can be 0.1uF, the circuit form of U22B is a non-inverting amplifier, R152 and R153 control the amplification factor, C145 is used for adjusting the AC zero of operational amplifier, the resistance values of R152 and R153 are both 10K, the capacitance value of C145 is 0.01uF, the voltage signal output from U22B passes through the low-pass filter circuit formed by R154 and C147, the resistance value of R154 is 1K, the capacitance value of C147 is 0.01uF, enters the clamping circuit formed by D42 and D43 of IN4148, and finally enters the input port of the single chip microcomputer U45. U45 and U46 are MIC4424 in model, TD5, TD6 and TD7 are 86T-451DNL in model, D35, 36D and 38D, D39 are 1N4148 in model, and a relay K8 is HFD27 in model.

In fig. 7-5, U41 is a voltage reference source, model REF3133, for providing a reference source to the single chip microcomputer U45, U42 and U43 are level conversion chips, and the connector DB4 is a physical interface for the electrode recognition module to interact with the control unit.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A high frequency surgical system, characterized by: the electrode isolation device comprises an operation electrode, an electrode identification unit, a control unit, a pedal signal input unit, an analog quantity isolation output unit, a logic unit, a radio frequency power amplifier unit and an output switching unit which are sequentially connected;

the input end of the logic unit is connected with the output end of the control unit and outputs two paths of complementary pulse signals; the output end of the radio frequency power amplification unit is also connected with the input end of the control unit, and outputs a voltage/current feedback signal to the control unit;

the control end of the output switching unit is connected with the output end of the control unit, and the output end of the output switching unit is connected with the operation electrode.

2. A high frequency surgical system according to claim 1, wherein: the control unit comprises a first single chip microcomputer U1, a voltage feedback conditioning circuit, a current feedback conditioning circuit, a first digital-to-analog converter U2 and an audio power amplifier U6;

3. A high frequency surgical system according to claim 2, wherein: the control unit further comprises a first storage U10 and a second storage U11, and the first storage U10 and the second storage U11 are communicated with the first single chip microcomputer U1 through an IIC bus and used for storing system parameters.

4. A high frequency surgical system according to claim 1 or 2, wherein: the logic unit comprises a three-input NAND gate and a first D trigger which are connected with each other, receives the output signal of the control unit and outputs two paths of complementary signals.

5. An hf-surgery system according to claim 4 wherein: the radio frequency power amplification unit comprises a first driving chip U32, a second driving chip U33, a third driving chip U34, a fourth driving chip U35, a fifth driving chip U36, a sixth driving chip U37, a seventh driving chip U38 and an eighth driving chip U39;

6. An hf-surgery system according to claim 5 wherein: the current and voltage acquisition circuit comprises a full-bridge driving circuit;

7. An hf-surgery system according to claim 6 wherein: the output switching unit comprises a relay K2, a relay K3, a relay K4, a relay K5, a relay K6 and a relay K7; the relay K2 and the relay K3 are used for controlling output bipolar electrotomy electrocoagulation, and P7 is a corresponding output socket; relays K4 and K5 are used to control output bipolar electrocoagulation, with P7 being its corresponding output socket; relays K6 and K7 are used to control output bipolar electrocoagulation, with P9 being its corresponding output socket; the three groups of relay arrays form an output switching module which is respectively connected with the control unit, and the control unit controls the high-frequency energy output by the high-frequency transformer T1 to be output by which relay array.

8. An hf-surgery system according to claim 6 wherein: the overcurrent protection device also comprises an overcurrent protection unit, the overcurrent protection unit comprises a current transformer S3, the current transformer S3 is connected between the 8 th pin and the 9 th pin of the high-frequency transformer T1 in series, the output end of the current transformer S3 is connected with the input end of a full-bridge rectification circuit, the output end of the full-bridge rectification circuit is sequentially connected with a current-limiting resistor R116, a clamping circuit, a double operational amplifier, a low-pass filter circuit and a magnetic bead FB11, the output end of the magnetic bead FB11 is connected with a comparator U31A and is connected with the non-inverting input end of the comparator U31A, the inverting input end of the comparator U31A is connected with a variable resistor W1, the variable resistor W1 divides a reference voltage source output by a voltage source for comparison with the current acquired by the overcurrent acquisition circuit, when the voltage acquired by the overcurrent acquisition circuit exceeds the voltage input to the inverting input end of the U31A, the 1 st pin, the MOS transistor Q1 is driven to be conducted through the gate resistor R84 and the gate pull-down resistor R86, the conduction of the MOS transistor Q1 enables the monostable trigger circuit to be triggered, the trigger signal is high level and is finally sent into the logic unit, the complementary signal output is cut off, and finally the high-frequency operation system stops outputting power.

9. A high frequency surgical system according to claim 1, wherein: the electrode identification unit comprises a second singlechip chip U45, a tenth transformer driving chip U46, an eleventh transformer driving chip U47, a fifth driving transformer TD5, a sixth driving transformer TD6, a seventh driving transformer TD7, a rectifying circuit, a relay K8, an energy storage capacitor C133, a resistor R143, an electrode type marking capacitor C132 and a current conditioning circuit;

10. A high frequency surgical system according to claim 1, wherein: the analog quantity isolation output unit comprises a first high-speed optical coupler U18, a second high-speed optical coupler U24, a second digital-to-analog converter U23 and a high-speed operational amplifier U19; the input ends of the first high-speed optical coupler U18 and the second high-speed optical coupler U24 are connected with the output end of the control unit, the output ends of the first high-speed optical coupler U18 and the second high-speed optical coupler U24 are respectively connected with the input end of a second digital-to-analog converter U23, and the output end of the second digital-to-analog converter U23 is sequentially connected with a high-speed operational amplifier U19, a resistor R50 and a magnetic; and the output end of the magnetic bead FB5 is connected with the input end of the adjustable switching power supply.