A plasma precise energy control protection system

Abstract

The present invention discloses a plasma precise energy control protection system, including an AD / DC module, a DC control module and a plasma energy output module, and also includes a switch circuit connected in series between the DC control module and the plasma energy output module; in the plasma energy output module, an energy control circuit: used for dynamic current sampling to detect impedance value, and then directly feedback to the second drive control circuit; when the impedance value detected is lower than the excitation impedance value of the plasma, energy control is performed to reduce the output energy of the impedance matching and output circuit; a parallel short circuit detection circuit: used for parallel short circuit detection, and then the obtained short circuit detection signal is sent to the switch circuit for short circuit judgment to realize the on-off of the switch circuit. The present invention adopts a direct feedback mechanism and parallel voltage sampling to detect the short circuit signal, has a fast response, stable system energy output, and good safety.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a plasma precise energy control and protection system. Background Art

[0002] The radio frequency plasma surgery system is a new generation of low-temperature plasma surgery system, which can be used for soft tissue dissection, resection, hemostasis and drying in surgical operations. It can be used in conjunction with an endoscope system for intracavitary surgery or with an imaging system for interventional treatment. It eliminates the damage and harm of radio frequency to doctors and patients and improves the efficiency of surgery. It also has various electrodes with different outer diameters, different curvatures and different lengths suitable for different departments.

[0003] When using a plasma surgical system for surgery, the energy of the plasma surgical system needs to be controlled within a certain range. The existing plasma surgical system uses serial current sampling, which needs to be fed back to the drive control module through a single-chip microcomputer, and the response time is long. Due to the inaccurate energy regulation of the existing plasma surgical system, the plasma surgical system exhibits problems such as slow response, sticking knife, slow cutting, yellowing of the cutting position, and easy damage to the equipment. In addition, the instantaneous energy output of the existing plasma surgical system is weak, and it is not easy to excite plasma, and it is not easy to continuously generate plasma. Summary of the invention

[0004] In view of this, the present application provides a plasma precise energy control protection system, in which the energy regulation circuit dynamically samples the bus current of the full-bridge inverter and boost circuit to detect the impedance value, and then directly feeds back to the second drive control circuit without passing through a single-chip microcomputer. A direct feedback mechanism is adopted, which has a fast response and a stable system energy output. In addition, the short-circuit signal detected by the parallel short-circuit detection circuit through parallel voltage sampling is more accurate. Under the control of the short-circuit detection signal, the switch circuit can be disconnected in time when a short circuit occurs, which has good safety and solves the technical problem that the equipment is easily damaged due to factors such as inaccurate short-circuit detection control and untimely energy feedback.

[0005] The technical solution provided by the present invention is as follows:

[0006] A plasma precise energy control protection system includes an AD / DC module, a DC control module and a plasma energy output module, and also includes a switch circuit connected in series between the DC control module and the plasma energy output module, wherein the plasma energy output module includes a second drive control circuit, a full-bridge inverter and boost circuit, an impedance matching and output circuit, a parallel short-circuit detection circuit and an energy regulation circuit, wherein:

[0007] The second drive control circuit (after isolation) drives the full-bridge inverter and boost circuit, so that the full-bridge inverter and boost circuit inverts and boosts the voltage output by the switch circuit, and then outputs energy through the impedance matching and output circuit;

[0008] Energy control circuit: used for dynamically sampling the current of the full-bridge inverter and boost circuit to detect the impedance value (i.e., dynamically sampling the bus current, which is equivalent to the impedance value of the blade environment when the working state is measured after being processed by the internal rectifier filter circuit and the resistor-capacitor network), and then directly feeding back to the second drive control circuit; when the impedance value detected is lower than the excitation impedance value of the plasma, energy control is performed to reduce the output energy of the impedance matching and output circuit, and ensure continuous excitation of the plasma (i.e., reducing the energy to a safe value, which ensures that the equipment is not damaged within a certain period of time and does not affect the plasma excitation, such as the equipment is not damaged within 500ms, which is equivalent to the working cycle of 3 to 4 switch modules at this time. The energy size here is not certain and should be based on the above standards, so it will not be repeated); -------First-level energy protection

[0009] Parallel short-circuit detection circuit: used to dynamically perform parallel short-circuit detection (i.e. parallel sampling, isolation, rectification and filtering, and comparison with the adjusted reference voltage) on the boost output end of the full-bridge inverter and boost circuit, and then send the obtained short-circuit detection signal to the switch circuit for short-circuit judgment to realize the on-off of the switch circuit; when it is judged to be a short circuit, the switch circuit is disconnected. --------Second-level energy protection

[0010] Furthermore, the switch circuit includes a peak power control circuit, a single chip microcomputer and a switch module connected in series between a DC control module and a plasma energy output module, wherein:

[0011] The peak power control circuit is used to dynamically sample and filter the current of the full-bridge inverter and boost circuit, and to adjust the amplification factor of the generated voltage signal to adjust the peak power point, and then send it to the single-chip microcomputer;

[0012] The single-chip microcomputer is used to process and control the working cycle of the switch module according to the received voltage signal, so that the output power of the plasma energy control system (i.e., the output power of the plasma energy output module) does not exceed the preset peak power and meets the preset power curve. The switch module in the switch circuit is connected in series in the circuit of the plasma precision energy control protection system, which is different from the above-mentioned function of only short-circuit protection; since the switch circuit also has a peak power control circuit, the peak power control circuit samples and amplifies the current of the plasma energy output module, generates a voltage signal and sends it to the single-chip microcomputer in the switch circuit, and the single-chip microcomputer controls the working cycle of the switch module according to the voltage signal, so that the output power of the plasma energy output module does not exceed the preset peak power and meets the preset power curve, which solves the problems of weak instantaneous energy excitation, difficult to excite plasma, difficult to continuously generate plasma, low cutting efficiency, and sticky knife and blunt scalpel cutting.

[0013] Furthermore, the parallel short-circuit detection circuit comprises a parallel sampling unit, a Hall voltage sensor, a rectifying and filtering unit and a comparing unit connected in sequence, wherein:

[0014] The parallel sampling unit is used to perform parallel sampling on the voltage boosted by the full-bridge inverter and boost circuit, and send the sampled voltage to the Hall voltage sensor;

[0015] The Hall voltage sensor is used to receive the sampled voltage sent by the parallel sampling unit and perform isolation processing, and then send the obtained sampled voltage to the rectification and filtering unit;

[0016] The rectification and filtering unit is used to receive the sampled voltage sent by the Hall voltage sensor and perform rectification and filtering, and then send the obtained sampled voltage to the comparison unit;

[0017] The comparison unit is used to receive the sampled voltage sent by the rectifier and filter unit and compare it with the adjusted reference voltage (adjustable), and generate a short-circuit detection signal, and then send the short-circuit detection signal to the switch circuit for short-circuit judgment and on-off action (specifically, the single-chip microcomputer receives and processes the short-circuit detection signal. When the single-chip microcomputer judges that there is a short circuit according to the short-circuit detection signal, the switch module of the switch circuit is controlled to be disconnected; when not working, the switch module is in a disconnected state. When starting to work, the DC control module fully charges it before opening the switch module).

[0018] Furthermore, the switch module includes a VMOS type switch module or a relay type switch module.

[0019] Furthermore, the VMOS switch module includes a PMOS switch module or an NMOS switch module.

[0020] Further, the VMOS type switch module includes an anti-interference unit, an amplifying switch unit, a driving switch unit and a switch unit connected in series between the DC control module and the plasma energy output module, wherein:

[0021] The anti-interference unit is used to receive the switch control signal sent by the single chip microcomputer, perform anti-interference processing, and then send it to the amplifying switch unit;

[0022] The amplifying switch unit is used to receive and amplify the switch control signal sent by the anti-interference unit, and then send it to the driving switch unit;

[0023] The driving switch unit is used to receive the switch control signal sent by the amplifying switch unit and then perform switching actions;

[0024] The switch unit is used to maintain the same on-off action as the driving switch unit.

[0025] Specifically, the peak power control circuit is used to dynamically sample and filter the current of the plasma energy output module, generate a voltage signal, and adjust the amplification factor of the voltage signal to adjust the peak power point; then send the voltage signal after the amplification factor adjustment to the single-chip microcomputer to control the working cycle of the switch module, and ensure that the output power of the plasma energy output module does not exceed the preset peak power and meets the preset power curve.

[0026] Furthermore, the peak power control circuit includes a bus sampling unit, an input filtering unit, an amplification factor adjustment unit and an output unit, wherein:

[0027] The bus sampling unit is used to dynamically sample the current of the full-bridge inverter and boost circuit, and send the sampling signal to the input filter unit;

[0028] The input filtering unit is used to receive the sampling signal sent by the bus sampling unit and perform filtering processing to generate a voltage signal, and then send the voltage signal to the amplification factor adjustment unit;

[0029] The amplification factor adjustment unit is used to receive the voltage signal, and perform amplification factor adjustment to adjust the peak power point, and then send the voltage signal after the amplification factor adjustment to the output unit;

[0030] The output unit is used to receive the voltage signal sent by the amplification factor adjustment unit and send it to the single chip microcomputer.

[0031] Furthermore, the peak power control circuit samples the bus current of the bridge arm bus of the full-bridge inverter and boost circuit through a sampling resistor.

[0032] Furthermore, the energy control circuit samples the bus current of the bridge arm bus of the full-bridge inverter and boost circuit through a current transformer.

[0033] Furthermore, the parallel short-circuit detection circuit includes

[0034] The parallel sampling unit is used to perform parallel sampling on the voltage boosted by the full-bridge inverter and boost circuit, and send the sampled voltage to the next stage;

[0035] The Hall voltage sensor is used to receive the sampled voltage sent by the parallel sampling unit and perform isolation processing, and then send the obtained sampled voltage to the next stage;

[0036] The rectification and filtering unit is used to receive the sampled voltage sent by the Hall voltage sensor and perform rectification and filtering, and then send the obtained sampled voltage to the next stage;

[0037] The comparison unit is used to receive the sampled voltage sent by the rectifier and filter unit and compare it with the adjusted reference voltage, and generate a short-circuit detection signal, and then send the short-circuit detection signal to the single-chip microcomputer. When the single-chip microcomputer determines that there is a short circuit according to the short-circuit detection signal, the switch module of the control switch circuit is disconnected.

[0038] Furthermore, it also includes a control panel, which includes an identification control module, an alarm circuit and a human-computer interaction module; when the switch circuit is determined to be short-circuited according to the short-circuit detection signal, the switch circuit sends a short-circuit control signal to the identification control module;

[0039] The identification control module is used to receive and process the short-circuit control signal sent by the single-chip microcomputer in the switch circuit, generate an alarm signal, control the DC control module and the plasma energy output module to be disconnected (i.e., control the first drive control circuit and the second drive control circuit to be disconnected), and send the alarm signal to the alarm circuit;

[0040] The alarm circuit is used to receive and process the alarm signal sent by the identification control module and give an alarm, and at the same time send the processed alarm signal to the human-computer interaction module for display. --------Third-level energy protection Compared with the prior art, the present invention has the following beneficial effects:

[0041] The main improvements of the present invention are:

[0042] 1) Add a switch circuit in the protection system for short circuit protection to prevent equipment damage. This invention is obviously different from the existing plasma surgery system.

[0043] 2) The bus current is sampled dynamically by the full-bridge inverter and boost circuit, and fed back to the second drive control circuit after being processed by the internal rectifier filter circuit and the resistor-capacitor network (i.e., equivalent to the measured impedance value), and energy regulation is performed when the impedance detected is lower than the excitation impedance value of the plasma, so that the output energy of the plasma energy output module is reduced; this direct feedback mechanism does not need to pass through the single-chip microcomputer, has a fast response, and the system energy output is stable, which can well prevent equipment damage. This invention point is obviously different from the existing plasma surgery system, and there is no technical inspiration from the existing technology.

[0044] 3) A new parallel short-circuit detection circuit is used for parallel sampling, isolation, rectification and filtering, and comparison with the adjusted reference voltage, and then a short-circuit detection signal is sent to the switch circuit; this short-circuit detection method is more accurate, and the switch circuit can disconnect the plasma energy output module in time when a short circuit occurs under the control of the short-circuit detection signal, which is safe. This invention is obviously different from the existing plasma surgery system, and there is no technical inspiration from the existing technology.

[0045] The combination of the above three points, on the one hand, the energy control circuit dynamically samples the bus current of the full-bridge inverter and boost circuit to detect the impedance value, and then directly feeds back to the second drive control circuit; this direct feedback mechanism does not need to pass through the single-chip microcomputer, and has a fast response. When the impedance value detected is lower than the excitation impedance value of the plasma, energy control is performed, which can rapidly reduce the output energy of the impedance matching and output circuit, and ensure the continuous excitation of the plasma without affecting the plasma excitation, thereby avoiding damage to the equipment due to excessive energy and ensuring the continuous generation of plasma; on the other hand, the plasma precise energy control protection system is enabled to perform parallel sampling of the boosted voltage of the full-bridge inverter and boost circuit (the sampling method and sampling point are different from the prior art) to accurately detect the short circuit situation, and control the on and off of the entire system through the added switch circuit, thereby playing a short circuit protection role; in similar cases, this method can quickly turn off the switch circuit after judging the short circuit, and only needs to turn off the switch circuit, and the DC control module and the plasma energy output module do not need to be shut down and restarted, which greatly shortens the reaction time; avoiding the defect that the conventional plasma energy output module needs to be shut down and restarted due to the lack of a switch circuit. Under this multiple protection mechanism, the plasma precise energy control protection system of the present application can quickly and accurately perform energy control and protection, solving the technical problem that the equipment is easily damaged due to factors such as inaccurate short-circuit detection control and untimely energy feedback. It can protect the equipment from damage when plasma is generated, and the practical effect is significantly better. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1The figure is a structural block diagram of a plasma precise energy control and protection system according to an exemplary embodiment.

[0047] Figure 2 The figure is a schematic diagram of a switch module circuit structure according to an exemplary embodiment.

[0048] Figure 3 The figure is a structural block diagram of a peak power control circuit according to an exemplary embodiment.

[0049] Figure 4 The present invention is a schematic diagram of the structures of a peak power control circuit, a full-bridge inverter and boost circuit, a parallel short-circuit detection circuit and an energy regulation circuit according to an exemplary embodiment.

[0050] Figure 5 The figure is a schematic diagram of the structure of a relay type switch module according to an exemplary embodiment.

[0051] Figure 6 The figure is a structural block diagram of a plasma precise energy protection control system according to an exemplary embodiment. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] like Figure 1 As shown, this embodiment provides a plasma precise energy control protection system including an AD / DC module, a DC control module and a plasma energy output module, and also includes a switch circuit connected in series between the DC control module and the plasma energy output module (the switch circuit is connected in series between the DC control module and the plasma energy output module through the switch module inside the switch circuit), and the plasma energy output module includes a second drive control circuit, a full-bridge inverter and boost circuit, an impedance matching and output circuit, a parallel short circuit detection circuit and an energy regulation circuit, wherein:

[0054] The second drive control circuit is used to drive the full-bridge inverter and boost circuit after being isolated;

[0055] The full-bridge inverter and boost circuit is used to invert and boost the voltage output by the switch circuit, and then output it to the impedance matching and output circuit;

[0056] The impedance matching and output circuit is used to perform impedance matching and output the voltage input by the full-bridge inverter and boost circuit;

[0057] The switch circuit includes a peak power control circuit, a single chip microcomputer and a switch module connected in series between a DC control module and a plasma energy output module, wherein:

[0058] The peak power control circuit is used to dynamically sample and filter the current of the full-bridge inverter and boost circuit, generate a voltage signal, and adjust the amplification factor of the voltage signal to adjust the peak power point, and then send the voltage signal after the amplification factor adjustment to the single-chip microcomputer;

[0059] The single chip microcomputer is used to receive and process the voltage signal sent by the peak power control circuit, and control the working cycle of the switch module according to the processed voltage signal (specifically, when the voltage signal is greater than the threshold, the working cycle of the switch module is controlled; and when the voltage signal is less than or equal to the set threshold, no processing is performed, that is, the switch module is always turned on), so that the output power of the plasma energy control system does not exceed the preset peak power and meets the preset power curve;

[0060] An energy control circuit is used to dynamically sample the bus current of the full-bridge inverter and boost circuit and feed it back to the second drive control circuit after being processed by the internal rectifier filter circuit and the resistor-capacitor network (i.e., equivalent to the measured impedance value); when the impedance detected by it is lower than the excitation impedance value of the plasma, the output energy of the plasma energy output module is reduced, and the continuous excitation of the plasma is ensured (i.e., the energy is reduced to a safe value, which ensures that the equipment is not damaged within a certain period of time and does not affect the plasma excitation, such as the equipment is not damaged within 500ms, which is equivalent to the working cycle of 3 to 4 switch modules at this time. The energy size here is not certain and should be based on the above standards, so it will not be repeated);

[0061] Parallel short-circuit detection circuit: used for parallel (dynamic) sampling, isolation, rectification and filtering of the voltage boosted by the full-bridge inverter and boost circuit, and comparison with the adjusted reference voltage, and then sending the obtained short-circuit detection signal to the single-chip microcomputer in the switch circuit; when the single-chip microcomputer determines that there is a short circuit according to the short-circuit detection signal, it controls the switch module in the switch circuit to disconnect.

[0062] Furthermore, in the peak power control circuit, the amplification factors are different for different types of cutter heads; for the same type of cutter head, the amplification factor after each sampling and filtering is constant.

[0063] It should be noted here that the plasma precise energy control protection system can ensure precise control of system energy while also playing a short-circuit protection role. On the one hand, the energy control circuit samples the current of the full-bridge inverter and boost circuit and directly feeds it back to the plasma energy output module without passing through the single-chip microcomputer in the middle, so the response is fast and the delay is small. In addition, the direct feedback mechanism is adopted, and the system energy output is stable, so that the surgical system using this embodiment has the advantages of fast cutting and high efficiency. On the other hand, the input and output ends of the switch module are respectively connected to the output end of the DC control module and the input end of the plasma energy output module, that is, the switch module is connected in series in the plasma precise energy protection control system. When the plasma When the sub-body precise energy protection and control system is working normally, the short-circuit detection signal generated by the parallel short-circuit detection circuit is a normal working signal. After the single-chip microcomputer receives this signal, the switch module is turned off and on in a normal working cycle. When the plasma precise energy protection and control system is in a short-circuit state, the short-circuit detection signal generated by the parallel short-circuit detection circuit is an abnormal working signal (a signal for judging that the system is in a short-circuit state). After receiving this signal, the single-chip microcomputer generates a switch control signal to control the switch module to disconnect, and the plasma precise energy control and protection system is disconnected, thereby playing a short-circuit protection role. Therefore, this embodiment can ensure precise energy control while also playing a good short-circuit protection effect, which is safe and reliable.

[0064] As a preference, the parallel short circuit detection circuit in this embodiment may include a parallel sampling unit, a Hall voltage sensor, a rectifying and filtering unit, and a comparing unit connected in sequence, wherein:

[0065] The parallel sampling unit is used to perform parallel sampling on the voltage boosted by the full-bridge inverter and boost circuit, and send the sampled voltage to the Hall voltage sensor;

[0066] The Hall voltage sensor is used to receive the sampled voltage sent by the parallel sampling unit and perform isolation processing, and then send the obtained sampled voltage to the rectification and filtering unit;

[0067] The rectification and filtering unit is used to receive the sampled voltage sent by the Hall voltage sensor and perform rectification and filtering, and then send the obtained sampled voltage to the comparison unit;

[0068] The comparison unit is used to receive the sampled voltage sent by the rectifier and filter unit and compare it with the reference voltage (adjustable), and generate a short-circuit detection signal, and then send the short-circuit detection signal to the single-chip microcomputer. When the single-chip microcomputer determines that there is a short circuit according to the short-circuit detection signal, the switch module of the control switch circuit is disconnected (the switch module is in a disconnected state when not working, and when starting to work, the DC control module fully charges it before turning on the switch module), and the DC control module and the plasma energy output module are not turned off temporarily.

[0069] It should be noted here that after the output voltage of the DC control module is input to the switch module, the switch module starts to charge and store energy until the switch module is opened; the parallel sampling unit detects the output voltage of the full-bridge inverter and boost circuit in the plasma energy output module, and uses a parallel voltage sensor (preferably a Hall voltage sensor) for accurate measurement. When the voltage is at or below the set value (it can also be converted into impedance, such as impedance below 10 ohms, which is equivalent to a short circuit), the voltage signal output by the parallel voltage sensor is rectified and filtered by the rectification and filtering unit, and then input to the comparison unit for comparison with the voltage set value. When the voltage signal after rectification and filtering is lower than or higher than the voltage set value (inclusive) (depending on the phase of the comparator), it is input to the single-chip microcomputer, and the single-chip microcomputer controls the switch module to shut down (delay judgment within 1 ms, preferably delay judgment within the range of 0 to 0.5 ms), thereby realizing short circuit detection and protection.

[0070] It should be noted here that the plasma energy control and protection system includes a DC control module and a plasma energy output module, the switch module is provided with an input end, an output end and a switch control input end, the input end and the output end of the switch module are respectively connected to the output end of the DC control module and the input end of the plasma energy output module, that is, the switch module is connected in series in the plasma energy control and protection system, the switch control input end of the switch module is connected to the single-chip microcomputer, receives the switch control signal sent by the single-chip microcomputer, and the switch module performs a disconnection or closing action according to the switch control signal. When the switch module is disconnected, the plasma energy output module is disconnected, and when the switch module is closed, the plasma energy output module is closed. In other words, the working cycle of the switch module is also the working cycle of the plasma energy control system. The voltage signal generated by the peak power control circuit is mainly used to control the working cycle of the switch module through the single-chip microcomputer, and to make the power peak output of the plasma energy control system not exceed the preset power peak and meet the preset power curve. Wherein, as needed, the preset peak power and the preset power curve can be preset in the peak power control circuit and the single-chip microcomputer in advance.

[0071] When the present embodiment is specifically implemented, the output voltage of the DC control module has different gears, such as 10 gears, each gear corresponds to a different voltage, the highest gear 10 corresponds to 65V, and the remaining gears decrease in sequence with the highest gear. The output end of the plasma energy output module is the output end of the plasma energy control system (the plasma energy control system includes a control panel, and the control panel is provided with an external interface that can be connected to a surgical blade and a foot switch. The output end of the plasma energy control system provides plasma output energy to the surgical blade through the external interface of the control panel). The output end of the plasma energy output module can be connected to surgical blades of different models through the external interface of the control panel. The models of surgical blades connected to the output end of the plasma energy control system are different, and the energy required by the surgical blades is also different. Accordingly, the peak power and power curve that the power output of the plasma energy control system needs to meet are different. The peak power and power curve corresponding to different types of surgical blades can be set by the operator according to actual needs. For example, when using blade A, the peak power is set to 300W, and the output power of the plasma energy control system needs to meet the power curve A. The peak power control circuit obtains the sampled current in real time, amplifies it, generates a voltage signal, and sends it to the microcontroller (what is actually measured is the real-time impedance between the two poles of the blade). The microcontroller can calculate the corresponding working cycle of the switch module when the peak power of 300W and the power curve A are met based on the received voltage signal (that is, different voltage signals here correspond to different preset peak powers and preset power curves), thereby generating a switch control signal to control the switch module to open or close. For the same type of blade, if 200 ohms is preset as the peak power point, then when the measured impedance is greater than 200 ohms, the working cycle of the single-chip microcomputer-controlled switch module is about 500ms (wherein the disconnection time is about 110ms), and when the measured impedance is 50 ohms, in order to adapt to the preset power curve, the working cycle of the single-chip microcomputer-controlled switch module is about 140ms (wherein the disconnection time is about 110ms), so that the output power of the plasma energy control system is always controlled within the required range. Compared with the prior art, in this technical solution, when the measured impedance is lower than the excitation impedance value of the plasma, the working cycle (composed of the disconnection time and the working time, and the disconnection time remains unchanged) becomes shorter (that is, the working time becomes shorter, that is, only the length of its working time is adjusted), the switch module is disconnected, and the switch circuit is charged and stored through the DC control module. This technical solution can adjust the working cycle of the switch module according to the preset peak power and the preset power curve. When the impedance is lower than the excitation impedance value of the plasma, the switch circuit disconnects the energy storage. Within a certain range, the working cycle is short and the burst energy is very strong, which can effectively avoid problems such as weak instantaneous energy excitation and not easy to generate plasma.When the surgical system of this embodiment is used during surgery, when tissue is attached to the surgical blade, that is, blade sticking occurs, the blade impedance changes. If the blade sticking problem is not solved, the surgical effect will be seriously affected. In this embodiment, since the switch circuit disconnects the energy storage, the energy is instantly excited for a short time. The plasma generated by the instantaneous energy can remove the tissue attached to the blade, quickly solving the blade sticking problem. In addition, since this embodiment can continuously output plasma energy, it has the advantages of fast cutting and high efficiency.

[0072] As a preference, the switch module in this embodiment may include a VMOS switch module or a relay switch module. When the VMOS switch module is used in this embodiment, the VMOS switch module may include an anti-interference unit, an amplifying switch unit, a driving switch unit, and a switch unit connected in series in a plasma energy control system circuit, wherein:

[0073] The anti-interference unit is used to receive the switch control signal sent by the single chip microcomputer, perform anti-interference processing, and then send it to the amplifying switch unit;

[0074] The amplifying switch unit is used to receive and amplify the switch control signal sent by the anti-interference unit, and then send it to the driving switch unit;

[0075] The driving switch unit is used to receive the switch control signal sent by the amplifying switch unit, and then perform on-off actions; for example, when the switch control signal sent by the single-chip microcomputer to the anti-interference unit is at a low level, the driving switch unit is turned on; when the switch control signal sent by the single-chip microcomputer to the anti-interference unit is at a high level, the driving switch unit is turned off;

[0076] The switch unit is used to maintain the same on-off action as the driving switch unit.

[0077] It should be noted here that the input and output ends of the switch unit are the input and output ends of the switch module. Figure 2 As shown, the circuit structure of the switch module in this embodiment may include a first MOS transistor Q1, a second MOS transistor Q2, a first voltage regulator Z1, a first transistor S1, a first diode D1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth capacitor C5 (the fifth capacitor C5 may be omitted) and a third external power supply U3, wherein:

[0078] The source and drain of the first MOS tube Q1 are respectively connected in series in the circuit of the plasma energy control system as the input end and the output end of the switch module, the first resistor R1 and the first voltage regulator Z1 are simultaneously connected in parallel between the source and the gate of the first MOS tube Q1, and the positive electrode of the first voltage regulator Z1 is connected to the gate of the first MOS tube Q1, the gate of the first MOS tube Q1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to the drain of the second MOS tube Q2, the source of the second MOS tube Q2 is grounded, and the second M The gate of the OS tube Q2 is connected to one end of the third resistor R3 and the collector of the first transistor S1 at the same time, the other end of the third resistor R3 is connected to the third external power supply U3, the emitter of the first transistor S1 is grounded, the base of the first transistor S1 is connected to the cathode of the first diode D1 and one end of the fifth capacitor C5 at the same time, the other end of the fifth capacitor C5 is grounded, the anode of the first diode D1 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the single-chip microcomputer as the switch control input end of the switch module.

[0079] In the switch module circuit structure provided in the present embodiment, the fourth resistor R4, the first diode D1 and the fifth capacitor C5 together form an anti-interference unit, wherein the first diode D1 and the fifth capacitor C5 together can play a role in preventing false triggering and anti-interference, the third resistor R3 and the first transistor S1 form an amplifying switch unit, the second resistor R2 and the second MOS transistor Q2 form a driving switch unit, wherein the second resistor R2 is a voltage-dividing resistor, the first MOS transistor, the first resistor R1 and the first voltage-stabilizing transistor Z1 form a switch unit, and the voltage-stabilizing transistor is provided in the switch unit to ensure the gate voltage stability of the first MOS transistor Q1 and improve the circuit working quality; in order to simplify the circuit structure, the first MOS transistor in the switch unit can adopt a PMOS transistor, and in specific work, the base of the first transistor S1 is connected from the microcontroller When a high level is received in the single-chip microcomputer, the first triode S1 is turned on, the gate of the second MOS tube Q2 is low level, and the second MOS tube Q2 is disconnected. At this time, the gate of the first MOS tube Q1 in the switch unit is high level, the first MOS tube Q1 is disconnected, and accordingly, the switch unit and the plasma energy control system are disconnected; when the base of the first triode S1 receives a low level from the single-chip microcomputer, the gate of the second MOS tube Q2 is high level, and the second MOS tube Q2 is turned on. At this time, the gate of the first MOS tube Q1 in the switch unit is low level, the first MOS tube Q1 is turned on, the switch unit is turned on, and accordingly, the switch unit and the plasma energy control system are turned on. Therefore, the single-chip microcomputer controls the working cycle of the switch circuit by sending a high level of a certain length and a low level of a certain length to the switch control input end of the switch module. In addition, as another embodiment different from the above-mentioned switch module circuit structure, the first MOS tube Q1 in the switch unit can also use an NMOS tube or a relay to realize the switch function. The use of a VMOS tube can make the reliability of this embodiment higher, with the characteristics of rapid switching, not easy to damage, and long service life. In this embodiment, the third external power supply U3 can be 12V.

[0080] As another preferred embodiment, the switch circuit provided in this embodiment may also use a relay type switch module, such as Figure 5 As shown, the relay type switch module includes a relay K, a transistor Q20 and a diode D20, wherein the emitter of the transistor Q20 is grounded and connected to the positive electrode of the diode D20, the negative electrode of the diode D20 is connected to the collector of the transistor Q20, the base of the transistor Q20 is connected to the single-chip microcomputer through a resistor R30, the collector of the transistor Q20 is also connected to one end of the coil of the relay K, and the other end of the coil of the relay K can be connected to a 12V external power supply, wherein the two ends of the switch contact of the relay K are respectively connected in series in the system circuit as the input end and the output end of the relay type switch module.

[0081] As a preference, Figure 3As shown, the peak power control circuit includes a bus sampling unit, an input filtering unit, an amplification factor adjustment unit and an output unit, wherein:

[0082] The bus sampling unit is used to dynamically sample the current of the plasma energy output module and send the sampling signal to the input filter unit;

[0083] The input filtering unit is used to receive the sampling signal sent by the bus sampling unit and perform filtering processing to generate a voltage signal, and then send the voltage signal to the amplification factor adjustment unit;

[0084] The amplification factor adjustment unit is used to receive the voltage signal, adjust the amplification factor, and then send the voltage signal after the amplification factor adjustment to the output unit; here, the amplification factor of the amplification factor adjustment unit is determined according to the preset power curves of different types of cutter heads. Different cutter head models may have different amplification factors. For example, if the peak power of the preset power curve A of the cutter head A is 300W, then the corresponding amplification factor is 2. If the peak power is changed, the corresponding amplification factor is changed;

[0085] The output unit is used to receive the voltage signal sent by the amplification factor adjustment unit and send it to the single chip microcomputer.

[0086] In order to better explain the peak power control circuit, Figure 3 As shown, this embodiment provides a specific peak power control circuit, including a first amplifier V1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a first sliding potentiometer RW1 (or an electronic potentiometer or other equivalent elements), wherein:

[0087] The positive input terminal of the first amplifier V1 is connected to one end of the fifth resistor R5 and one end of the second capacitor C2 at the same time, the other end of the second capacitor C2 is grounded, the other end of the fifth resistor R5 is grounded through the first capacitor C1, the first capacitor C1 is connected to one end of the fifth resistor R5 and one end of the ninth resistor R9, the other end of the ninth resistor R9 is grounded, and the other end of the ninth resistor R9 relative to the ground is connected to the plasma energy output module as a bus sampling input terminal, and the reverse input terminal of the first amplifier V1 is connected to one end of the sixth resistor R6 and one end of the third capacitor C3 at the same time. The first amplifier V1 is connected to the reverse input terminal through the first sliding potentiometer RW1, and the sliding tap of the first sliding potentiometer RW1 is connected to the output terminal of the first amplifier V1. The output terminal of the first amplifier V1 is also connected to one end of the seventh resistor R7. The other end of the seventh resistor R7 serves as the output terminal of the energy control module and is connected to one end of the fourth capacitor C4 and one end of the eighth resistor R8. The other end of the fourth capacitor C4 and the other end of the eighth resistor R8 are grounded at the same time.

[0088] It should be noted here that, in the above-mentioned peak power control circuit, the ninth resistor R9 constitutes a bus sampling unit, the first capacitor C1, the second capacitor C2 and the fifth resistor R5 constitute an input filtering unit, the third capacitor C3, the sixth resistor R6, the first amplifier V1 and the first sliding potentiometer RW1 constitute an amplification factor adjustment unit, and the seventh resistor R7, the eighth resistor R8 and the fourth capacitor C4 constitute an output unit.

[0089] like Figure 4 As shown, when the present embodiment is implemented, the plasma energy output module includes a full-bridge inverter and boost circuit, the full-bridge inverter and boost circuit includes a full-bridge inverter circuit and a boost transformer connected to each other, the bus sampling input end of the peak power control circuit can be connected to the bridge arm bus in the full-bridge inverter circuit, and because the sampling current is relatively small or there is interference, it can be filtered and amplified in turn through the filtering unit and the amplification factor adjustment unit in the peak power control circuit, and finally a voltage signal is generated and sent to the single-chip microcomputer through the output unit.

[0090] like Figure 4 As shown, the parallel short circuit detection circuit provided in this embodiment may include a Hall voltage sensor T3, a first comparator A1, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a sixth capacitor C6, a tenth diode D10, an eleventh diode D11, a second sliding potentiometer RW2 and a second external power supply U2, wherein:

[0091] The two ends of the primary side of the Hall voltage sensor T3 are respectively connected to one end of the tenth resistor R10 and one end of the eleventh resistor R11, and the other end of the tenth resistor R10 and the other end of the eleventh resistor R11 are respectively connected to the plasma energy output module as the two ends of the input end of the parallel short-circuit detection circuit, and the two ends of the secondary side of the Hall voltage sensor T3 are respectively connected to the positive electrode of the tenth diode D10 and the positive electrode of the eleventh diode D11, and the secondary side of the Hall voltage sensor T3 is connected to the second external power supply, and the cathode of the tenth diode D10 is also connected to the cathode of the eleventh diode D11. The cathode of the first comparator A1, one end of the twelfth resistor R12, one end of the sixth capacitor C6 and the positive input end of the first comparator A1 are connected, the anode of the eleventh diode D11, the other end of the twelfth resistor R12 and the other end of the sixth capacitor C6 are grounded at the same time, the reverse input end of the first comparator A1 is connected to the sliding tap of the second sliding potentiometer RW2, one end of the resistance of the second sliding potentiometer RW2 is connected to the second external power supply U2, the other end of the resistance of the second sliding potentiometer RW2 is grounded, and the output end of the first comparator A1 is connected to the single-chip microcomputer as the output end of the parallel short-circuit detection circuit.

[0092] It should be noted that the tenth resistor R10 and the eleventh resistor R11 together constitute a parallel sampling unit, the tenth diode D10, the eleventh diode D11, the twelfth resistor R12 and the sixth capacitor C6 together constitute a rectification and filtering unit, and the first comparator A1 and the second sliding potentiometer RW2 together constitute a comparison unit. In specific operation, the voltage at the reverse input end of the first comparator A1 is used as a reference voltage. By adjusting the sliding tap of the second sliding potentiometer RW2, the reference voltage can be changed. The positive input end of the first comparator A1 is an input voltage related to the short-circuit detection signal. In specific operation, the Hall voltage sensor T3 receives the sampling voltage signal. When the voltage is lower than the set value, it is input to the in-phase end of the first comparator A1 after rectification and filtering, and the first comparator A1 outputs a low level; when the voltage is higher than the set value, it is input to the in-phase end of the first comparator A1 after rectification and filtering, and the first comparator A1 outputs a high level.

[0093] If the voltage at the same-direction input terminal of the first comparator A1 is used as the reference voltage, when the voltage is higher than the set value, it is input to the inverting terminal of the first comparator A1 after rectification and filtering, and the first comparator A1 outputs a low level; when the voltage is lower than the set value, it is input to the inverting terminal of the first comparator A1 after rectification and filtering, and the first comparator A1 outputs a high level. In this embodiment, the first external power supply U1 can be 12V (regulated power supply), and the second external power supply U2 can be 5V (regulated power supply).

[0094] like Figure 4 As shown, the energy control circuit may include a current transformer T1, a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9 and a resistor-capacitor network, wherein one end of the primary side of the current transformer T1 is connected to the bridge arm bus in the full-bridge inverter circuit in the full-bridge inverter and boost circuit as a sampling end, and the other end of the primary side of the current transformer T1 is connected to the bus sampling input end of the peak power control circuit as a sampling end for current sampling, and one end of the secondary side of the current transformer T1 is connected to the cathode of the sixth diode D6 at the same time. and the anode of the seventh diode D7, the other end of the secondary side of the current transformer T1 is simultaneously connected to the anode of the eighth diode D8 and the cathode of the ninth diode D9, the anode of the sixth diode D6 is connected to the anode of the ninth diode D9 and then grounded and connected to one end of the input end of the resistor-capacitor network, the cathode of the seventh diode D7 is connected to the cathode of the eighth diode D8 and then connected to the other end of the input end of the resistor-capacitor network, and the output end of the resistor-capacitor network is connected to the input end of the drive control circuit.

[0095] It should be noted here that only in abnormal circumstances, such as insufficient insulation of the blade or even short circuit, on the one hand, when the impedance value detected by the energy control circuit is lower than the excitation impedance value of the plasma, the resistance and capacitance values ​​are adjusted through the resistance and capacitance network, and then directly fed back to the second drive control circuit (without passing through the single-chip microcomputer, the reaction is faster), driving the full-bridge inverter and boost circuit to perform inverter boost, and input impedance matching and output circuit, so that the output energy of the entire system is gradually reduced; and when the impedance value detected by the energy control circuit is higher than the excitation impedance value of the plasma, because the current is small at this time, after sampling, the feedback processed by the rectifier filter circuit and the resistance and capacitance network is very small, and the role of the energy control circuit is negligible, so it will hardly affect the output of energy; on the other hand, when the parallel short circuit detection circuit detects a short circuit, the single-chip microcomputer of the switch circuit controls the switch module to disconnect. In addition, it can also be associated with adding a similar energy control circuit at the same position of the DC control module.

[0096] To better illustrate this embodiment, the AC / DC module in this embodiment may include an AC input filter circuit, a high-voltage rectifier filter circuit, and a low-voltage output circuit, wherein:

[0097] The AC input filter circuit is used to filter the input AC power and then output the filtered AC power to the high-voltage rectifier filter circuit;

[0098] The high-voltage rectifying and filtering circuit is used to rectify and filter the alternating current input by the alternating current input filtering circuit to obtain high-voltage direct current, and then output the high-voltage direct current to the low-voltage output circuit and the DC control module;

[0099] The low-voltage output circuit is used to isolate and reduce the high-voltage direct current input by the high-voltage rectifier and filter circuit to obtain low-voltage direct current, and then output the low-voltage direct current to the DC control module, the switch circuit, the plasma energy output module and the control panel.

[0100] The DC control module in this embodiment may include a soft-switching full-bridge inverter and buck circuit, a rectifier filter output circuit and a first drive control circuit, wherein;

[0101] The first drive control circuit: after being isolated, is used to drive the full-bridge inverter and buck circuit. Here, the first drive control circuit drives the gate of the VMOS tube in the soft-switching full-bridge inverter and buck circuit, and can make the DC control module output different voltages according to different types of blades;

[0102] The soft-switch full-bridge inverter and buck circuit is used to invert and buck the high-voltage direct current output by the AC / DC control module, and then output the resulting voltage to the rectifier and filter output circuit;

[0103] The rectification and filtering output circuit is used to rectify and filter the voltage output by the soft-switching full-bridge inverter and buck circuit, and then output the rectified and filtered voltage to the switching circuit.

[0104] Furthermore, if Figure 6 As shown, in this embodiment, a control panel is also included, and the control panel may include an external interface, an identification control module, an alarm circuit and a human-computer interaction module, wherein:

[0105] The identification control module is used to identify and process the surgical blade head information and foot switch information connected to the external interface, generate a first control signal, and then send the first control signal to the DC control module and the plasma energy output module at the same time; it is also used to receive and process the short-circuit signal sent by the switch module, generate an alarm signal, and then send the alarm signal to the alarm circuit; it is also used to receive and process the operator signal sent by the human-computer interaction module, generate a second control signal, and then send the second control signal to the DC control module and the plasma energy output module at the same time (i.e., the process of the operator manually selecting the gear position);

[0106] The alarm circuit is used to receive the alarm signal sent by the identification control module and give an alarm, and at the same time send the alarm signal to the human-computer interaction module for display;

[0107] The human-machine interaction module is used to receive and display the signals sent by the identification control module and the alarm circuit, and is also used to provide a human-machine interface for the operator and send the relevant signals input by the operator to the identification control module.

[0108] It should be noted here that in the present embodiment, the interface of the external device (such as a foot switch, a surgical knife head, etc.), the external device, the display / touch screen of the control panel itself, etc. are all isolated from the plasma energy control system provided in the present embodiment through an isolation circuit. When the parallel short-circuit detection circuit performs short-circuit detection on the full-bridge inverter and boost circuit and determines that it is short-circuited, the single-chip microcomputer will send a short-circuit signal to the identification control module while controlling the switch module to disconnect. After the identification control module identifies the short-circuit signal, it controls the alarm circuit to alarm. The alarm circuit can include various alarm forms such as sound alarm, sound and light alarm, and the human-computer interaction module can include a touch screen interaction mode or an ordinary button display interaction module.

[0109] In addition, when implementing this embodiment, the process of the operator manually selecting the gear is as follows: After the operator selects the working mode, such as cutting, hemostasis, etc., through the foot switch, each working mode (each has multiple energy gears, such as 10 gears) is manually selected through the human-computer interaction module, and the energy gear can be adjusted. The recognition control module is preset with a corresponding default gear according to different models of blade heads, which is generally the best gear. The operator can select the required gear through the human-computer interaction module as needed, input the gear selection signal to the recognition control module, and select the working state of the working mode through the foot switch (such as selecting cutting or hemostasis on or off). If the cutting mode is selected, the foot switch sends a switch signal to the identification control module through the external interface (the hemostasis switch provides a switch signal to the identification control module through another channel). After the identification control module identifies the switch signal, it controls the first drive control circuit in the DC control module and the second drive control module in the plasma energy output module (that is, the first drive control circuit and the second drive control module are turned on at the same time, and the switch module in the switch circuit is turned on only after the DC control module fully charges it. Although there is a sequence in time, the opening time difference between the switch module and the first two is in milliseconds, which is equivalent to turning on the first drive control circuit, the second drive control module and the switch module at the same time).

[0110] On the one hand, the identification control module outputs the corresponding control voltage to the first drive control circuit according to the preset different energy gears. After isolation, the first drive control circuit drives the soft switch full-bridge inverter and buck circuit (input to the gate of the VMOS tube). After the voltage is stepped down, it is input to the rectifier filter output circuit output to control the output voltage of the corresponding gear of the DC control module (as the input voltage of the switch circuit). The operator can also select the corresponding gear according to the human-computer interaction module to manually adjust the preset gear, and then adjust the output voltage of the corresponding gear of the DC control module through the above-mentioned workflow.

[0111] On the other hand, after the identification control module receives the switch signal of the foot switch, it turns on the second drive control circuit, which is isolated and used to drive the full-bridge inverter and boost circuit (input to Figure 4 The voltage is boosted and input to the impedance matching and output circuit to control the energy output of the plasma energy output module. Figure 4 The energy control circuit dynamically samples the bus current of the full-bridge inverter and boost circuit and feeds back to the drive control circuit after processing through the rectifier filter circuit and the resistor-capacitor network (the resistor-capacitor parameters are pre-adjusted at the factory). The parallel short-circuit detection circuit samples and processes the boosted voltage of the full-bridge inverter and boost circuit in parallel, generates a short-circuit detection signal, and then sends the short-circuit detection signal to the single-chip microcomputer in the switch circuit. The single-chip microcomputer controls the switch module in the switch circuit to open or close according to the short-circuit detection signal. During normal operation, the first drive control circuit and the second drive control circuit are both turned on, and are only turned off during abnormal operation (such as when the blade is judged to be short-circuited, or the foot switch is turned off).

[0112] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A plasma precise energy control and protection system, comprising an AC / DC module, a DC control module and a plasma energy output module, characterized in that: It also includes a switch circuit, which includes a peak power control circuit, a single-chip microcomputer, and a switch module connected in series between a DC control module and a plasma energy output module; the plasma energy output module includes a second drive control circuit, a full-bridge inverter and boost circuit, an impedance matching and output circuit, a parallel short-circuit detection circuit, and an energy regulation circuit, wherein: The second drive control circuit drives the full-bridge inverter and boost circuit, so that the full-bridge inverter and boost circuit inverts and boosts the voltage output by the switch circuit, and then outputs energy through the impedance matching and output circuit; Energy control circuit: used for dynamic current sampling of the full-bridge inverter and boost circuit to detect the impedance value, specifically including dynamic bus current sampling, after processing by the internal rectifier filter circuit and the resistor-capacitor network, the impedance value of the blade environment in the working state is measured, and then directly fed back to the second drive control circuit; when the impedance value detected is lower than the excitation impedance value of the plasma, energy control is performed to reduce the output energy of the impedance matching and output circuit, and ensure continuous excitation of the plasma; Parallel short-circuit detection circuit: used to dynamically perform parallel short-circuit detection on the boost output end of the full-bridge inverter and boost circuit, and then send the obtained short-circuit detection signal to the switch circuit for short-circuit judgment to realize the on-off of the switch circuit; The peak power control circuit is used to dynamically sample and filter the current of the full-bridge inverter and boost circuit, and to adjust the amplification factor of the generated voltage signal to adjust the peak power point, and then send it to the single-chip microcomputer; The single chip microcomputer is used to process the received voltage signal and control the working cycle of the switch module so that the output power of the plasma energy control system does not exceed the preset peak power and meets the preset power curve.

2. A plasma precise energy control protection system according to claim 1, characterized in that: The switch module includes a VMOS switch module or a relay switch module.

3. A plasma precise energy control protection system according to claim 2, characterized in that: The VMOS switch module includes a PMOS switch module or an NMOS switch module.

4. A plasma precise energy control protection system according to claim 2, characterized in that: The VMOS switch module comprises an anti-interference unit, an amplifying switch unit, a driving switch unit and a switch unit connected in series between a DC control module and a plasma energy output module, wherein: The anti-interference unit is used to receive the switch control signal sent by the single chip microcomputer, perform anti-interference processing, and then send it to the amplifying switch unit; The amplifying switch unit is used to receive and amplify the switch control signal sent by the anti-interference unit, and then send it to the driving switch unit; The driving switch unit is used to receive the switch control signal sent by the amplifying switch unit and then perform switching actions; The switch unit is used to maintain the same on-off action as the driving switch unit.

5. The plasma precise energy control protection system according to claim 1, characterized in that: The peak power control circuit includes a bus sampling unit, an input filtering unit, an amplification factor adjustment unit and an output unit, wherein: The bus sampling unit is used to dynamically sample the current of the full-bridge inverter and boost circuit, and send the sampling signal to the input filter unit; The input filtering unit is used to receive the sampling signal sent by the bus sampling unit and perform filtering processing to generate a voltage signal, and then send the voltage signal to the amplification factor adjustment unit; The amplification factor adjustment unit is used to receive the voltage signal, and perform amplification factor adjustment to adjust the peak power point, and then send the voltage signal after the amplification factor adjustment to the output unit; The output unit is used to receive the voltage signal sent by the amplification factor adjustment unit and send it to the single chip microcomputer.

6. The plasma precise energy control protection system according to claim 1, characterized in that: The peak power control circuit samples the bus current of the bridge arm bus of the full-bridge inverter and boost circuit through a sampling resistor.

7. The plasma precise energy control protection system according to claim 1, characterized in that: The energy control circuit samples the bus current of the bridge arm bus of the full-bridge inverter and boost circuit through a current transformer.

8. The plasma precise energy control protection system according to claim 1, characterized in that: The parallel short-circuit detection circuit comprises: Parallel sampling unit: used to perform parallel sampling on the voltage boosted by the full-bridge inverter and boost circuit, and send the sampled voltage to the next stage; Hall voltage sensor: used for receiving the sampling voltage sent by the parallel sampling unit and performing isolation processing, and then sending the obtained sampling voltage to the next stage; Rectification and filtering unit: used for receiving the sampled voltage sent by the Hall voltage sensor and performing rectification and filtering, and then sending the obtained sampled voltage to the next stage; Comparison unit: used for receiving the sampled voltage sent by the rectification and filtering unit and comparing it with the adjusted reference voltage, and then sending the generated short-circuit detection signal to the switch circuit for short-circuit judgment and on-off action.

9. The plasma precise energy control protection system according to claim 1, characterized in that: It also includes a control panel, which includes an identification control module, an alarm circuit and a human-computer interaction module; when the switch circuit is determined to be short-circuited according to the short-circuit detection signal, the switch circuit sends a short-circuit control signal to the identification control module; The identification control module is used to receive and process the short-circuit control signal sent by the single-chip microcomputer in the switch circuit, generate an alarm signal, control the DC control module and the plasma energy output module to be disconnected, and send the alarm signal to the alarm circuit; The alarm circuit is used to receive and process the alarm signal sent by the identification control module and to alarm, and at the same time send the processed alarm signal to the human-computer interaction module for alarm display.

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