阅读说明：本技术 自适应可触摸等离子体装置及其控制方法 (Adaptive touchable plasma apparatus and control method thereof ) 是由 杨静慧 赵勇 张秋俊 胡逢亮 巨姗 于 2021-08-12 设计创作，主要内容包括：本申请涉及一种自适应可触摸等离子体装置及其控制方法,自适应可触摸等离子体装置包括电源装置、等离子体发生装置和自适应控制装置,等离子体发生装置连接电源装置和自适应控制装置；电源装置用于输出电压至等离子体发生装置,自适应控制装置用于采集等离子体发生装置的人体接触电流,根据人体接触电流与预设的人体安全电流阀值进行对比,并根据对比结果调节电源装置的输出电压,以使等离子体发生装置的人体接触电流处于安全阀值范围内,有效确保人体接触等离子体的安全性。(The application relates to a self-adaptive touchable plasma device and a control method thereof, wherein the self-adaptive touchable plasma device comprises a power supply device, a plasma generating device and a self-adaptive control device, and the plasma generating device is connected with the power supply device and the self-adaptive control device; the power supply device is used for outputting voltage to the plasma generating device, the self-adaptive control device is used for collecting human body contact current of the plasma generating device, comparing the human body contact current with a preset human body safety current threshold value according to the human body contact current, and adjusting the output voltage of the power supply device according to a comparison result, so that the human body contact current of the plasma generating device is within the safety threshold value range, and the safety of human body contact plasma is effectively ensured.)

1. An adaptive touchable plasma device, comprising a power supply device, a plasma generation device and an adaptive control device, wherein the plasma generation device is connected with the power supply device and the adaptive control device;

the power supply device is used for outputting voltage to the plasma generating device, the self-adaptive control device is used for collecting human body contact current of the plasma generating device, comparing the human body contact current with a preset human body safe current threshold value according to the human body contact current, and adjusting the output voltage of the power supply device according to a comparison result so that the human body contact current of the plasma generating device is within a safe threshold value range.

2. The adaptive touchable plasma device according to claim 1, wherein the plasma generation device comprises a dielectric layer, a high voltage electrode layer and a low voltage electrode layer, the high voltage electrode layer and the low voltage electrode layer are respectively disposed on two sides of the dielectric layer, the high voltage electrode layer is connected with the power supply device, and the low voltage electrode layer is connected with the adaptive control device.

3. The adaptive touchable plasma device according to claim 2, wherein the dielectric layer is a ceramic, quartz or teflon material.

4. The adaptive touchable plasma device according to claim 2, wherein the dielectric layer has a thickness of 50-150 μ ι η.

5. The adaptive touchable plasma device according to claim 2, wherein the high voltage electrode layer and the low voltage electrode layer are both metal thin film layers.

6. The adaptive touchable plasma device according to claim 5, wherein the thickness of the metal thin film layer is 10 μm-50 μm.

7. The adaptive touchable plasma device according to claim 1, wherein the adaptive control means comprises a controller and a measurement network circuit, the controller connecting the power supply means and the measurement network circuit, the measurement network circuit connecting the plasma generation means.

8. The adaptive touchable plasma device according to claim 7, wherein the measurement network circuit is a body impedance network circuit, and the body impedance network circuit and the body safe current threshold are obtained by performing numerical simulation and test result optimization on a national standard body impedance model for a DBD discharge model.

9. An adaptive touchable plasma device according to any of claims 1-8, wherein the power supply means is a pulsed or high frequency alternating current alternating power supply.

10. A method of controlling an adaptive touchable plasma device, the method being implemented based on the adaptive touchable plasma device of any one of claims 1 to 9, the method comprising: the human body contact current of the plasma generating device is collected, the human body contact current is compared with a preset human body safety current threshold value according to the human body contact current, and the output voltage of the power supply device is adjusted according to the comparison result, so that the human body contact current of the plasma generating device is within the safety threshold value range.

Technical Field

The application relates to the technical field of sterilization and disinfection equipment, in particular to a self-adaptive touchable plasma device and a control method thereof.

Background

The plasma is the fourth state of matter, and is considered to be a novel molecular activation means by virtue of a large amount of active components such as high-energy electrons, ions, excited-state atoms, free radicals and the like contained in the system. A large number of researches and applications show that active substances such as ultraviolet light, heat radiation and the like generated by the atmospheric pressure low-temperature plasma in the air can not only effectively destroy the cell structure of microorganisms to cause apoptosis, but also induce the expression of growth factors in vascular endothelial cells to promote wound epidermis regeneration, granulation tissue proliferation and collagen precipitation, and have positive effects on sterilization, disinfection, hemostasis, coagulation, wound healing promotion and the like. On the other hand, the atmospheric pressure low-temperature plasma has good selectivity on bacteria and normal tissue cells, and can inactivate harmful bacteria and ensure the safety of healthy cell tissues by optimizing and regulating parameters of the plasma.

However, plasma contacts different parts of the human body, and plasma discharge and human body impedance values are affected by air environment differences, human body contact conditions and the like. How to ensure the safety of human body contacting plasma is an urgent problem to be solved.

Disclosure of Invention

Accordingly, it is necessary to provide an adaptive touchable plasma device and a control method thereof, which can effectively ensure the safety of human body contact with plasma, in order to solve the problem that plasma discharge and human body impedance are affected by air environment difference, human body contact condition and the like.

An adaptive touchable plasma device, comprising a power supply device, a plasma generation device and an adaptive control device, wherein the plasma generation device is connected with the power supply device and the adaptive control device;

the power supply device is used for outputting voltage to the plasma generating device, the self-adaptive control device is used for collecting human body contact current of the plasma generating device, comparing the human body contact current with a preset human body safe current threshold value according to the human body contact current, and adjusting the output voltage of the power supply device according to a comparison result so that the human body contact current of the plasma generating device is within a safe threshold value range.

In one embodiment, the plasma generation device includes a dielectric layer, a high voltage electrode layer and a low voltage electrode layer, the high voltage electrode layer and the low voltage electrode layer are respectively disposed on two sides of the dielectric layer, the high voltage electrode layer is connected to the power supply device, and the low voltage electrode layer is connected to the adaptive control device.

In one embodiment, the dielectric layer is made of ceramic, quartz or teflon.

In one embodiment, the dielectric layer has a thickness of 50 μm to 150 μm.

In one embodiment, the high voltage electrode layer and the low voltage electrode layer are both metal thin film layers.

In one embodiment, the thickness of the metal thin film layer is 10 μm to 50 μm.

In one embodiment, the adaptive control means comprises a controller and a measurement network circuit, the controller being connected to the power supply means and the measurement network circuit, the measurement network circuit being connected to the plasma generating means.

In one embodiment, the measurement network circuit is a human body impedance network circuit, and the human body impedance network circuit and the human body safe current threshold are obtained by performing numerical simulation and test result optimization on a national standard human body impedance model for a DBD (Dielectric Barrier Discharge) Discharge model.

In one embodiment, the power supply means is a pulsed or high frequency alternating current alternating power supply.

A control method of an adaptive touchable plasma device, which is realized based on the adaptive touchable plasma device, comprises the following steps: the human body contact current of the plasma generating device is collected, the human body contact current is compared with a preset human body safety current threshold value according to the human body contact current, and the output voltage of the power supply device is adjusted according to the comparison result, so that the human body contact current of the plasma generating device is within the safety threshold value range.

According to the self-adaptive touchable plasma device and the control method thereof, the human body contact current of the plasma generating device is collected, the human body contact current is compared with a preset human body safe current threshold value according to the human body contact current, and the output voltage of the power supply device is adjusted according to the comparison result, so that the human body contact current of the plasma generating device is within the safe threshold value range, and the safety of the human body contacting the plasma is effectively ensured.

Drawings

FIG. 1 is a block diagram of an adaptive touchable plasma device in one embodiment;

FIG. 2 is a schematic diagram of the structure of an adaptive touchable plasma device in one embodiment;

FIG. 3 is a diagram illustrating DBD discharge voltage waveforms in an embodiment;

FIG. 4 is a voltage diagram of the body impedance network according to an embodiment.

Detailed Description

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

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. The "connection" in the following embodiments is understood as "electrical connection", "communication connection", or the like if the connected circuits, modules, units, or the like have electrical signals or data transmission therebetween.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, the terminology used in this specification includes any and all combinations of the associated listed items.

In one embodiment, there is provided an adaptive touchable plasma device, as shown in fig. 1, comprising a power supply device 100, a plasma generation device 200 and an adaptive control device 300, the plasma generation device 200 being connected to the power supply device 100 and the adaptive control device 300; the power supply device 100 is used for outputting voltage to the plasma generation device 200, the adaptive control device 300 is used for collecting human body contact current of the plasma generation device 200, comparing the human body contact current with a preset human body safe current threshold value according to the human body contact current, and adjusting the output voltage of the power supply device 100 according to the comparison result so that the human body contact current of the plasma generation device 200 is within the safe threshold value range.

Specifically, the power supply device 100 may be a high voltage power supply, and outputs a high voltage ac to the plasma generation device 200, and the adaptive control device 300 collects the human body contact current of the plasma generation device 200 and compares the human body contact current with a preset human body safety current threshold. The specific type of power supply apparatus 100 is not exclusive and may be a pulsed or high frequency alternating current power supply, outputting a high voltage with a peak value of 10-25kV and an output frequency of 5k-30 kHz. In this embodiment, the power supply device 100 is an adjustable high-frequency ozone power supply, and specifically adopts a 200W adjustable high-frequency ozone power supply for power supply.

The specific value of the human body safe current threshold is not unique and can be set according to actual conditions, the human body safe current threshold is a range and is related to frequency, and environmental factors such as relative humidity and temperature can influence results and are reflected on the frequency. The range smaller than or equal to the human body safe current threshold value can be used as the safe threshold value range, and when the acquired human body contact current is larger than the human body safe current threshold value, the self-adaptive control device 300 adjusts the amplitude and the frequency of the output voltage of the power supply device 100, so that the human body contact current of the plasma generation device 200 is smaller than or equal to the human body safe current threshold value, and the human body contact current of the plasma generation device 200 is within the safe threshold value range.

According to the self-adaptive touchable plasma device, the power supply device 100 outputs voltage to the plasma generation device 200, the self-adaptive control device 300 collects human body contact current of the plasma generation device 200, compares the human body contact current with a preset human body safe current threshold value according to the human body contact current, and adjusts the output voltage of the power supply device 100 according to a comparison result, so that the human body contact current of the plasma generation device 200 is within the safe threshold value range, and the safety of the human body contacting the plasma is effectively ensured.

In one embodiment, the plasma generation device 200 includes a dielectric layer, a high voltage electrode layer and a low voltage electrode layer, wherein the high voltage electrode layer and the low voltage electrode layer are respectively disposed on two sides of the dielectric layer, the high voltage electrode layer is connected to the power supply device 100, and the low voltage electrode layer is connected to the adaptive control device 300. The material of the dielectric layer is not exclusive and can be ceramic, quartz or polytetrafluoroethylene. The thickness of the dielectric layer may be 50 μm to 150 μm. In this embodiment, a ceramic wafer with a thickness of 100 μm is used as the dielectric layer. The structures and materials of the high-voltage electrode layer and the low-voltage electrode layer are not exclusive, and the high-voltage electrode layer and the low-voltage electrode layer can adopt metal thin film layers with the thickness of 10-50 mu m. In this example, copper foils were used as the high-voltage electrode layer and the low-voltage electrode layer.

In one embodiment, the adaptive control apparatus 300 includes a controller connected to the power supply apparatus 100 and a measurement network circuit connected to the plasma generation apparatus 200. The controller may be an MCU (Micro Control Unit, chinese is a Micro Control Unit). The measurement network circuit detects the touch body sensing current, and transmits the electrical signals into the MCU by acquiring and converting the electrical signals into the electrical signals. And the control end of the MCU reads an electrical signal provided by the measurement network circuit, compares the electrical signal with a human body safety current threshold value after frequency factor compensation, and finally adjusts the output parameter of the high-voltage power supply according to the actual contact current change so as to ensure that the human body contact current is always within the safety threshold value range. Wherein the frequency factor compensation can reduce the influence of environmental factors such as relative humidity and temperature on signal acquisition.

The structure of the measurement network circuit is not unique, and in one embodiment, the measurement network circuit is a human body impedance network circuit, and the human body impedance network circuit and the human body safe current threshold value are obtained by performing numerical simulation and test result optimization on a national standard human body impedance model aiming at a DBD discharge model. Specifically, as shown in fig. 2, the high-voltage side of the DBD discharge model 210 is connected to a high-voltage power supply BAT, the low-voltage side of the DBD discharge model 210 is connected to a measurement terminal a of the body impedance network circuit 310, and a measurement terminal B of the body impedance network circuit 310 is grounded. The body impedance network circuit 310 includes a resistor R_SResistance R_BResistance R₁Capacitor C_SAnd a capacitor C₁Resistance R_SAnd a capacitor C_SAfter parallel connection, one end is connected with a measuring terminal A, and the other end is connected with a resistor R_BFirst terminal and resistor R₁First terminal of (3), resistor R_BIs connected with a measuring terminal B and a capacitor C₁Are respectively connected with a resistor R₁Second terminal and resistor R_BThe second end of (a). Wherein, the resistance R_SHas a resistance value of 1500 omega and a resistance R_BHas a resistance value of 500 omega and a resistance R₁Has a resistance of 10000 omega and a capacitance C_SHas a capacitance value of 0.22 muF, a capacitance C₁The capacitance value of (1) is 0.022 μ F. The MCU receives the voltage U2 output from the body impedance network circuit 310, and calculates the body contact current U2/500 (peak value).

In one embodiment, there is also provided a control method of an adaptive touchable plasma device, which is implemented based on the adaptive touchable plasma device described above, and includes: the human body contact current of the plasma generating device is collected, the human body contact current is compared with a preset human body safety current threshold value according to the human body contact current, and the output voltage of the power supply device is adjusted according to the comparison result, so that the human body contact current of the plasma generating device is within the safety threshold value range.

Specifically, human body contact current of the plasma generating device is collected through the self-adaptive control device, comparison is carried out according to the human body contact current and a preset human body safety current threshold value, and output voltage of the power supply device is adjusted according to a comparison result. The human body safe current threshold is related to frequency, and environmental factors such as relative humidity and temperature influence results are reflected on the frequency. The range smaller than or equal to the human body safe current threshold value can be used as the safe threshold value range, and the self-adaptive control device adjusts the amplitude and the frequency of the output voltage of the power supply device when the collected human body contact current is larger than the human body safe current threshold value, so that the human body contact current of the plasma generating device is smaller than or equal to the human body safe current threshold value, and the human body contact current of the plasma generating device is in the safe threshold value range.

The power supply device can be a high-voltage power supply and outputs high-voltage alternating current to the plasma generating device, and the self-adaptive control device acquires human body contact current of the plasma generating device and compares the human body contact current with a preset human body safety current threshold value. The specific type of power supply device is not exclusive and can be a pulse or high-frequency alternating current alternating power supply, the output peak value of the high-voltage alternating current power supply is 10-25kV high in output frequency, and the output frequency is 5k-30 kHz. In this embodiment, the power supply device is an adjustable high-frequency ozone power supply, and specifically, a 200W adjustable high-frequency ozone power supply is adopted for power supply.

In one embodiment, the plasma generating device comprises a dielectric layer, a high-voltage electrode layer and a low-voltage electrode layer, wherein the high-voltage electrode layer and the low-voltage electrode layer are respectively arranged on two sides of the dielectric layer, the high-voltage electrode layer is connected with the power supply device, and the low-voltage electrode layer is connected with the self-adaptive control device. The material of the dielectric layer is not exclusive and can be ceramic, quartz or polytetrafluoroethylene. The thickness of the dielectric layer may be 50 μm to 150 μm. In this embodiment, a ceramic wafer with a thickness of 100 μm is used as the dielectric layer. The structures and materials of the high-voltage electrode layer and the low-voltage electrode layer are not exclusive, and the high-voltage electrode layer and the low-voltage electrode layer can adopt metal thin film layers with the thickness of 10-50 mu m. In this example, copper foils were used as the high-voltage electrode layer and the low-voltage electrode layer.

In one embodiment, the adaptive control means comprises a controller connected to the power supply means and to the measurement network circuit, which is connected to the plasma generating means, and a measurement network circuit. Wherein, the controller can adopt MCU. The measurement network circuit detects the touch body sensing current, and transmits the electrical signals into the MCU by acquiring and converting the electrical signals into the electrical signals. And the control end of the MCU reads an electrical signal provided by the measurement network circuit, compares the electrical signal with a human body safety current threshold value after frequency factor compensation, and finally adjusts the output parameter of the high-voltage power supply according to the actual contact current change so as to ensure that the human body contact current is always within the safety threshold value range. Wherein the frequency factor compensation can reduce the influence of environmental factors such as relative humidity and temperature on signal acquisition.

The structure of the measurement network circuit is not unique, and in one embodiment, the measurement network circuit is a human body impedance network circuit, and the human body impedance network circuit and the human body safe current threshold value are obtained by performing numerical simulation and test result optimization on a national standard human body impedance model aiming at a DBD discharge model. Specifically, as shown in fig. 2, the high-voltage side of the DBD discharge model is connected to a high-voltage power supply BAT, the low-voltage side of the DBD discharge model is connected to a measurement terminal a of the body impedance network circuit, and a measurement terminal B of the body impedance network circuit is grounded. The body impedance network circuit 310 includes a resistor R_SResistance R_BResistance R₁Capacitor C_SAnd a capacitor C₁Resistance R_SAnd a capacitor C_SAfter parallel connection, one end is connected with a measuring terminal A, and the other end is connected with a resistor R_BFirst terminal and resistor R₁First terminal of (3), resistor R_BIs connected with a measuring terminal B and a capacitor C₁Are respectively connected with a resistor R₁Second terminal and resistor R_BThe second end of (a). Wherein, the resistance R_SHas a resistance value of 1500 omega and a resistance R_BHas a resistance value of 500 omega and a resistance R₁Has a resistance of 10000 omega and a capacitance C_SHas a capacitance value of 0.22 muF, a capacitance C₁The capacitance value of (1) is 0.022 μ F. The MCU receives the voltage U2 output from the body impedance network circuit 310, and calculates the body contact current U2/500 (peak value).

According to the control method of the self-adaptive touchable plasma device, the human body contact current of the plasma generation device is collected, the human body contact current is compared with a preset human body safe current threshold value according to the human body contact current, and the output voltage of the power supply device is adjusted according to the comparison result, so that the human body contact current of the plasma generation device is within the safe threshold value range, and the safety of the human body contacting the plasma is effectively ensured.

In order to facilitate a better understanding of the above-described adaptive touchable plasma device, a detailed explanation is given below in connection with specific embodiments.

Aiming at the problem of electrical safety of high-frequency alternating-current dielectric barrier discharge acting on a human body, a human body impedance network and a DBD (direct-bonded diode) discharge model in a GB/T12113-2003 contact current and protection conductor current measuring method (called national standard for short later) are combined, plasma contacts different parts of the human body, the plasma discharge and the human body impedance value can be influenced by the air environment difference, the contact condition of the human body and the like, and the self-adaptive touchable plasma device can adaptively adjust the plasma sensing current threshold value by acquiring electrical signals. Meanwhile, the method can also provide guidance for the development of plasma biomedical application and medical plasma sources. The reasonability and influence factors of a human body impedance model and a safety limit value in the national standard are preliminarily evaluated by a human body in different environments, a subsequent optimization direction is given, and reference is provided for the evaluation of the safety of the human body acted by low-temperature plasma.

The self-adaptive touchable plasma device comprises a plasma generating device, a high-voltage power supply and a self-adaptive control device. As shown in fig. 1, the high voltage power supply outputs high voltage to the plasma generation device 200, the adaptive control device 300 collects the human body contact current of the plasma generation device 200, compares the human body contact current with a preset human body safe current threshold value, and adjusts the output voltage of the high voltage power supply according to the comparison result, so that the human body contact current of the plasma generation device 200 is within the safe threshold value range. The human body safe current threshold is related to frequency, and environmental factors such as relative humidity and temperature influence results are reflected on the frequency. The range smaller than or equal to the human body safe current threshold value can be used as the safe threshold value range, and when the acquired human body contact current is larger than the human body safe current threshold value, the self-adaptive control device 300 adjusts the amplitude and the frequency of the output voltage of the high-voltage power supply, so that the human body contact current of the plasma generating device 200 is smaller than or equal to the human body safe current threshold value, and the human body contact current of the plasma generating device 200 is in the safe threshold value range.

The plasma generating device 200 is a single-layer dielectric barrier discharge structure, the dielectric material is ceramic, quartz or polytetrafluoroethylene and other insulating materials, the thickness of the dielectric is 50-150 μm, and metal thin layers (10-50 μm) are attached to two sides of the dielectric to be used as high-voltage and low-voltage electrodes. By adding the dielectric layer on the electrode, the safety problem that a human body contacts with plasma is solved. The structures and materials of the high-voltage electrode and the low-voltage electrode are not unique, and the high-voltage electrode layer and the low-voltage electrode layer can be made of metal films, for example, copper foils are used as the high-voltage electrode layer and the low-voltage electrode layer.

The high-voltage power supply is a pulse or high-frequency alternating current alternating power supply, the peak-peak value of the output power supply is 10-25kV high voltage, and the output frequency is 5k-30 kHz. The adaptive control means 300 is divided into a measuring network circuit of contact current and a controller. The controller can adopt MCU, and the measuring network circuit detects the touch body sensing current, and through gathering and converting the electricity signal into electricity signal, sends into MCU with electricity signal. And the control end of the MCU reads an electrical signal provided by the measurement network circuit, compares the electrical signal with a human body safe current threshold value after frequency factor compensation, and finally adjusts the output parameter of the high-voltage power supply according to the actual contact current change so as to enable the human body contact current to be always within the safe threshold value range, thereby realizing the self-adaptive adjustment of the induced current within the human body contact range according to the different human body impedances under different environments.

Specifically, the measurement network circuit is a human body impedance network circuit, the human body impedance network circuit and the human body safe current threshold value are obtained by carrying out numerical simulation and test result optimization on a national standard human body impedance model aiming at a DBD discharge model. As shown in FIG. 2, the high voltage side of the DBD discharge model 210 is connected to a high voltage power supply BAT, the low voltage side of the DBD discharge model 210 is connected to a measurement terminal A of the body impedance network circuit 310, and a measurement terminal B of the body impedance network circuit 310 is grounded. The MCU receives the voltage U2 output from the body impedance network circuit 310, and calculates the body contact current U2/500 (peak value).

The high-voltage power supply adopts a 200W adjustable high-frequency ozone power supply for power supply, the DBD device takes a ceramic wafer with the thickness of 100 mu m as a medium, and copper foils are pasted on two sides of the ceramic wafer to be used as high-voltage and low-voltage electrodes. The measurement terminal A of the body impedance network is connected to the ground side, the terminal B is connected to the ground, and the model of the body impedance network combined with the DBD discharge is shown in FIG. 2. When the 200W adjustable high-frequency ozone power supply is used for supplying power, and the palm of a human body is contacted with a ceramic wafer medium with the thickness of 100 microns, the measured DBD discharge voltage waveform and the voltage U2 of the human body impedance network are respectively shown in fig. 3 and fig. 4. The amplitude and the frequency of the power supply can be adjusted through the equivalent impedance of a human body, so that the self-adaptive adjustment of the sensing current is achieved. Due to asymmetry of the positive and negative electrodes of the DBD device, the measurement results of fig. 3 and 4 show that the weighted contact current of the body impedance model is 0.724mA at 5.9 kV.

The application provides a tangible plasma device of self-adaptation combines together national standard human impedance network and DBD model of discharging to through the method of experiment repeated contact attempt, touch under single DBD reactor and the specific condition can contact discharge voltage and electric current, detect through touch body perception electric current, through gathering electrical signal, convert electricity signal into, and transmit feedback signal into MCU, realize power self-adaptation regulation, ensure that human touch current is in human safe threshold. The self-adaptive touchable plasma device has the following beneficial effects:

1. the generated plasma source has certain safety and can be in direct contact with a human body. The strong sterilizing property of plasma makes the device hopeful to be applied to clinical medical treatment, including anti-infection, wound treatment, hemostasis, skin disease treatment, tooth cleaning, skin beautifying and the like.

2. The reasonability and influence factors of a human body impedance model and a safety limit value in the national standard are preliminarily evaluated by a human body in different environments, and a subsequent optimization direction is given. And provides reference for the safety evaluation of the low-temperature plasma acting on the human body.

3. The electric current is sensed through the touch body, the electric signal is acquired and converted into an electric signal, and a feedback signal is transmitted into the MCU, so that the power supply is adaptively adjusted, and the human touch current is ensured to be in a human body safety threshold value.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.