CN113679467A - Variable phase array electrode device - Google Patents
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- CN113679467A CN113679467A CN202110911546.2A CN202110911546A CN113679467A CN 113679467 A CN113679467 A CN 113679467A CN 202110911546 A CN202110911546 A CN 202110911546A CN 113679467 A CN113679467 A CN 113679467A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00702—Power or energy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00827—Current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00892—Voltage
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Abstract
The invention discloses a variable phase array electrode device which comprises an electrode module, a voltage sampling circuit, a current sampling circuit, a temperature detection circuit, a main controller, a driving circuit and an impedance matching circuit. The electrode module is arranged in a mode that the common electrode and the peripheral electrodes are uniformly arranged around the common electrode, parasitic parameter influence is eliminated through the impedance matching circuit, the heating value in the area defined by the peripheral electrodes and the common electrode is the same, and the problem that the heating value is different due to the fact that the efficiency of a certain electrode is different from that of other electrodes is solved.
Description
Technical Field
The invention belongs to the technical field of electrode type electrocautery instruments.
Background
Most of the high-frequency fulguration instruments are used for ablation and necrosis of tissues in the current practical use. Many of the radio frequency cosmetic techniques currently on the market are products evolved from the original high frequency electrocautery. The technology is realized by changing the structure and energy of the electrode, the energy is loaded on the skin of a human body, when high-frequency current flows through tissues, joule heat is generated, and three-space-too-chain is broken by utilizing collagen at about 45-50 ℃. The collagen is subjected to cell recombination, the elasticity of the cells is improved, the collagen regeneration is promoted, and simultaneously, the dermis layer is stimulated to secrete more new collagen fibers for regeneration. However, many beauty devices adopting the technology of the high-frequency electrocautery are on the market at present, and the reliability of the products has risks, such as impedance reduction caused by temperature rise in the working process and high instantaneous energy, so that patients feel uncomfortable and have acupuncture feeling and can burn skin.
As in the patent application CN109498996A, the emphasis is placed on phase design between multiple electrodes to control uniform heating. When the number of the electrodes is fixed, the phase angle is completely fixed, on one hand, although energy output exists between any two electrodes in the mode, although energy output also exists between two electrodes far away from each other, when the two electrodes far away from each other act on a human body, impedance parameters at two ends are much larger than those between two electrodes near to each other, so that uniform heating of a region cannot be achieved in the case, and the reliability problem still exists. On the other hand, the patent application does not consider the existence of parasitic parameters and can not maximize the efficiency. The arrangement of the angle alone cannot achieve uniform heating in the region of action.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above disadvantages, the present invention provides a variable phase array electrode device, which solves the technical problem of the prior art that the resonance point shifts due to the parasitic parameters in the electrode type electrocautery, and aims to heat the load uniformly in the electrode action area.
The technical scheme is as follows: in order to solve the above problems, the variable phase array electrode device of the present invention may adopt the following technical scheme:
a variable phase array electrode device comprises an electrode module, a voltage sampling circuit, a current sampling circuit, a temperature detection circuit, a main controller, a driving circuit and an impedance matching circuit;
the electrode module comprises a central common electrode and a plurality of peripheral electrodes uniformly arranged around the common electrode; a load end is formed between the two peripheral electrodes and between each peripheral electrode and the common electrode by connecting a load;
the main controller is used for generating a driving signal with a certain frequency and a voltage amplitude modulation instruction according to preset parameters, so that the driving circuit generates a driving signal with a certain amplitude; the driving signal is loaded to a load end through an impedance matching circuit; then, further adjusting according to the feedback parameters of the load to form closed-loop adjustment;
the impedance matching circuit is used for matching parasitic inductance and/or parasitic capacitance existing in the circuit, so that the reactance Z of a load end is R0; where R0 is the actual impedance at the load side.
Has the advantages that: compared with the prior art, the variable phase array electrode device provided by the invention can acquire the load parameters under the condition of the existing phase through the real-time sampling of the voltage sampling circuit and the current sampling circuit, and then matches the parasitic inductance and/or the parasitic capacitance existing in the circuit with the over-control impedance matching circuit so as to adjust the efficiency of the circuit; so as to reduce or eliminate the influence of parasitic parameters in the circuit where the electrode is positioned on the efficiency; the problem of different heating values caused by different efficiencies of a certain electrode and other electrodes is avoided. Meanwhile, the common electrode and the peripheral electrodes uniformly surrounding the common electrode are adopted in the invention, namely two adjacent peripheral electrodes and the common electrode form a triangular area, the side lengths in the triangular area are the same, and the heating value is the same under the condition of eliminating the influence of parasitic parameters, so that the heating values in the areas surrounding the peripheral electrodes surrounding the common electrode are the same.
Drawings
Fig. 1 is a schematic structural diagram of an electrode module of the variable phase array electrode device of the present invention.
Fig. 2 is a schematic circuit diagram of an electrode module of the variable phase array electrode device according to the present invention.
Fig. 3 is a circuit configuration diagram in an electrode module of the variable array electrode apparatus of the present invention.
Fig. 4 is a flowchart of performing impedance matching.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Referring to fig. 1 and 2, the variable phase array electrode device provided by the present invention includes an upper computer, an electrode module (shown as an electrode output port in fig. 2), a voltage sampling circuit (shown as a voltage transformer in fig. 2), a current sampling circuit (shown as a current transformer in fig. 2), a multiplier, a temperature detection circuit, a main controller, a driving circuit, an impedance matching circuit, and a voltage amplitude modulation module.
As shown in fig. 1, the electrode module includes a central common electrode P0 and several peripheral electrodes P1 to PN uniformly arranged around the common electrode P0 (N is the number of peripheral electrodes, and N is 6 in this embodiment); the two peripheral electrodes and the connection between each peripheral electrode and the common electrode are used for connecting a load to form a load end.
The upper computer is used for setting the phase difference output between the electrodes and the output energy level.
The main controller is used for generating a driving signal with a certain frequency and a voltage amplitude modulation instruction according to preset parameters, so that the driving circuit generates a driving signal with a certain amplitude; controlling the impedance matching circuit according to the calculating multiplier and the voltage and current sampling value to complete the impedance matching circuit; the driving signal is loaded to a load end through an impedance matching circuit; and then further adjusting to form a closed loop adjustment according to the feedback parameter of the load. The main controller generates a voltage amplitude modulation instruction through the voltage amplitude modulation module.
The impedance matching circuit is used for matching parasitic inductance and/or parasitic capacitance existing in the circuit, so that the reactance Z of a load end is R0; where R0 is the actual impedance at the load side.
As shown in fig. 1, the distance between each peripheral electrode and the common electrode is equal, and the distance between two adjacent peripheral electrodes is also equal. The initial phase angle of the electrode of P1 and the voltage of the common point P0 is 0, and then the phase angle is increased by 360 degrees/N once; in addition, the radius of the electrode is r, the distance between two peripheral electrodes is L1, the distance between P0 and PN is L2, and the current between P0 and P1 is I, and it is noted that the distance between the electrodes is smaller than or equal to the radius of the electrode in order to achieve the actual therapeutic effect in the treatment area, the specific principle is as follows: the basic rf, Physics, Safety, and aesthetic applications described in journal of the cosmetology skin science society, 2015, volume 2, pages 1-22 (cane Irvine Duncan, Michael krein. basic radio frequency: Physics and Safety and Application to aesthesia. this patent cites the Bipolar radio frequency Systems of this document. this article states that tissue response to Bipolar rf can be demonstrated by thermal experiments using porcine tissue for in vitro studies. The distance between the electrodes is about the size of the electrodes or less, the penetration depth is about half of the distance between the electrodes, and the distributed energy is uniform. As the inter-electrode distance increases, the rf energy distribution becomes non-uniform and most of the heat is concentrated near the electrode surface. The bipolar geometry given in this document is one in which the two electrodes are the same size, 10 mm, and the distance between them is 10 mm. The hot zone was located between the electrodes and had a uniform distribution to a depth of 5 mm. For bipolar geometries, the distance between the electrodes is about the size of the electrodes or less, and the penetration depth is about half the distance between the electrodes. As the inter-electrode distance increases, the rf energy distribution becomes non-uniform and most of the heat is concentrated near the electrode surface. Therefore, in order to uniformly heat the two electrodes, the distance between the electrodes and the size relationship of the electrodes must be controlled.
Thus, the energy between the spaced electrodes is substantially ineffective in treating the tissue between the electrodes, which is a small percentage of thermal equilibrium. The effect of uniform heating can be achieved by only considering the electrical parameters between P0 and PN and the electrical parameters between the peripheral adjacent electrodes. In this embodiment, the peripheral electrodes are all circular electrodes with the same size and have a radius of r; the distance L1 between the two peripheral electrodes is less than or equal to 2 r; the distance L2 between the peripheral electrode and the common electrode is less than or equal to 2 r.
Taking an array structure composed of the peripheral 6 electrode and the central electrode P0 as an example, P0 is a common electrode, the potential is 0, Pn outputs a high-frequency sine wave with an effective value U, and assuming that the phase angle of P1 is 0 °, the voltages of the peripheral electrode and the central P0 electrode can be expressed as:
ψ is 360 °/N, and a is the amplitude of the voltage.
Assuming that the electrical conductivity of the tissue is ρ and the resistance R is L ρ, the value of the voltage between the peripheral electrode and P0 is equal, so that the value of the current I between P0 and the peripheral electrode is U/R, and the amount of heat generated between P0 and the peripheral electrode is equal regardless of the influence of other parameters, and further, since the peripheral electrodes are arranged in an equiangular distribution, the value of the voltage between any adjacent peripheral electrodes is equal to
When N is 6, the sequential angles are 360 °/6 and 60 ° are increased, so that the energy generated by the P1- > P2, P2- > P3, P3- > P4 and P5- > P6 electrodes acting on the load end is the same in the same period.
The above conclusion is achieved in an ideal situation, but in a practical situation, the situation is not so ideal, the voltage value reaching the load end is different between any two electrodes due to the inductance L on the wiring harness and the parasitic capacitance C between the wires, which also causes uneven heating of the area type, and in order to solve the defect, an impedance matching circuit is added in the embodiment to overcome the influence of the parasitic parameters. As shown in fig. 3, the impedance matching circuit includes a first module and a second module connected in parallel with the first module; the first module comprises n first lines which are connected in parallel, and each first line comprises a first matching resistor and a matching capacitor; switches are arranged at two ends of the first circuit, the same end of each of two adjacent first matching resistors is also provided with a switch, and one end of each of two adjacent matching capacitors is also provided with a switch; the second module comprises n second lines which are connected in parallel, each second line comprises a second matching resistor, and each second line is provided with a switch; where n is the number of peripheral electrodes.
Parasitic series inductance L exists from the drive end to the load endStringParasitic parallel capacitance C exists between the electrodesAnd areAssume that when the load is at a certain time, the voltage at the load end is equal to
Wherein A is the amplitude of the voltage; omega is angular frequency; t is an independent variable; psi 0 is the initial phase angle; when parasitic inductance L exists in the circuitStringWhile adjusting L in the impedance matching circuitnAnd CmSo that
Wherein L isnIs the inductance value, C, of the first matching resistor on the nth first linemThe capacitance value of the matching capacitor on the mth first line; m and n may be different.
When parasitic capacitance C existsAnd areAt the time of L, adjustLnSo that
To match the parasitic capacitance; wherein L isLnThe inductance value of the second matching resistor on the nth second line.
As shown in fig. 4, the main controller is used to control the multiplier and the impedance matching circuit to complete impedance matching.
The voltage sampling circuit and the current sampling circuit are both connected with the multiplier; the voltage sampling circuit is used for measuring the voltage of the load end; the current sampling circuit is used for measuring the current of the load end; the multiplier is used for measuring active power in the circuit.
And referring to fig. 4 again, the process of determining whether the impedance matching is completed is to determine that parasitic parameters exist in the circuit when the voltage waveform acquired by the voltage sampling circuit and the voltage waveform of the current sampling circuit have a phase difference. Wherein, whether a parasitic capacitance or a parasitic inductance exists in the circuit is judged by adjusting the matching value respectively. If the parameter phase angle of the second line is adjusted to be smaller, the existence of the parasitic capacitance can be judged, and if not, the existence of the parasitic inductance is judged. And when the phase angle between the voltage waveform collected by the voltage sampling circuit and the voltage waveform of the current sampling circuit is zero, judging that the impedance matching is finished. The above embodiment can realize uniform heating of the region where the load is located by combining the matrix phase arrangement between the electrodes and the impedance matching.
The invention embodies a number of methods and approaches to this solution and the foregoing is only a preferred embodiment of the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (10)
1. A variable phase array electrode device is characterized by comprising an electrode module, a voltage sampling circuit, a current sampling circuit, a temperature detection circuit, a main controller, a driving circuit and an impedance matching circuit;
the electrode module comprises a central common electrode and a plurality of peripheral electrodes uniformly arranged around the common electrode; a load end is formed between the two peripheral electrodes and between each peripheral electrode and the common electrode by connecting a load;
the main controller is used for generating a driving signal with a certain frequency and a voltage amplitude modulation instruction according to preset parameters, so that the driving circuit generates a driving signal with a certain amplitude; the driving signal is loaded to a load end through an impedance matching circuit; then, further adjusting according to the feedback parameters of the load to form closed-loop adjustment;
the impedance matching circuit is used for matching parasitic inductance and/or parasitic capacitance existing in the circuit, so that the reactance Z of a load end is R0; where R0 is the actual impedance at the load side.
2. The variable phase array electrode device according to claim 1, wherein each peripheral electrode is equidistant from the common electrode, and distances between two adjacent peripheral electrodes are also equal; the peripheral electrodes are all round electrodes with the same size, and the radius of the peripheral electrodes is r; the distance L1 between the two peripheral electrodes is less than or equal to 2 r; the distance L2 between the peripheral electrode and the common electrode is less than or equal to 2 r.
3. The variable phase array electrode assembly as claimed in claim 1 or 2, wherein the impedance matching circuit comprises a first block and a second block connected in parallel with the first block;
the first module comprises n first lines which are connected in parallel, and each first line comprises a first matching resistor and a matching capacitor; switches are arranged at two ends of the first circuit, the same end of each of two adjacent first matching resistors is also provided with a switch, and one end of each of two adjacent matching capacitors is also provided with a switch;
the second module comprises n second lines which are connected in parallel, each second line comprises a second matching resistor, and a switch is arranged on each second line.
4. The variable phase array electrode assembly as claimed in claim 3, wherein the voltage at the load end is set to be equal to or lower than the voltage at the load end
Wherein A is the amplitude of the voltage; w is the angular frequency; t is an independent variable; psi 0 is the initial phase angle; when parasitic inductance L exists in the circuitStringWhile adjusting L in the impedance matching circuitnAnd CmSo that
Wherein L isnIs the inductance value, C, of the first matching resistor on the nth first linemIs the m first lineThe capacitance value of the matching capacitor on the circuit;
when parasitic capacitance C existsAnd areAt the time of L, adjustLnSo that
To match the parasitic capacitance; wherein L isLnThe inductance value of the second matching resistor on the nth second line.
5. The variable phase array electrode assembly of claim 4, wherein the voltages of any one of the peripheral electrodes and the central electrode are:
psi is 360 DEG/n; a voltage value between adjacent peripheral electrodes of
The number of peripheral electrodes; when N is 6, then the successive angles are 360 °/6 in 60 ° increments; a is the amplitude of the voltage; w is the angular frequency; t is an independent variable; and N is the number of peripheral electrodes.
6. The variable phase array electrode device according to claim 4, further comprising a multiplier, wherein the voltage sampling circuit and the current sampling circuit are connected to the multiplier; the voltage sampling circuit is used for measuring the voltage of the load end; the current sampling circuit is used for measuring the current of the load end; the multiplier is used for measuring active power in the circuit.
7. The variable phase array electrode device according to claim 6, wherein the determination circuit determines that the impedance matching has been completed when the phase angle between the voltage waveform sampled by the voltage sampling circuit and the voltage waveform of the current sampling circuit is zero, when the voltage waveform sampled by the voltage sampling circuit is out of phase with the voltage waveform of the current sampling circuit.
8. The variable phase array electrode assembly as claimed in claim 1, further comprising a voltage amplitude modulation module, wherein the main controller generates the voltage amplitude modulation command via the voltage amplitude modulation module.
9. The variable phase array electrode assembly as claimed in claim 3, wherein the number of the peripheral electrodes is 6, and wherein the initial phase angle of the voltage between one peripheral electrode and the common electrode is 0, and then the phase angles between adjacent peripheral electrodes are sequentially increased by 60 °.
10. The variable phase array electrode device according to claim 6, further comprising an upper computer for setting an inter-electrode output phase difference and an output energy level; and the main controller controls the impedance matching circuit according to the calculation multiplier and the voltage and current sampling value so as to complete the impedance matching circuit.
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| CN202110911546.2A CN113679467A (en) | 2021-08-10 | 2021-08-10 | Variable phase array electrode device |
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| CN202110911546.2A CN113679467A (en) | 2021-08-10 | 2021-08-10 | Variable phase array electrode device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5772659A (en) * | 1995-09-26 | 1998-06-30 | Valleylab Inc. | Electrosurgical generator power control circuit and method |
| US20070093806A1 (en) * | 1991-07-05 | 2007-04-26 | Desai Jawahar M | Device and Method for Multi-Phase Radio-Frequency Ablation |
| US20070125662A1 (en) * | 2003-12-30 | 2007-06-07 | Image Guided Therapy Scientifique Unitec | Device for treating a biological tissue volume by localise hyperthermy |
| CN202207398U (en) * | 2011-07-22 | 2012-05-02 | 李娜 | Multi-contact radio frequency beauty instrument |
| CN106575953A (en) * | 2014-07-14 | 2017-04-19 | 柯惠有限合伙公司 | Dual band power amplifier circuit for microwave ablation |
| CN108233886A (en) * | 2018-03-12 | 2018-06-29 | 锐石创芯（深圳）科技有限公司 | Wideband impedance matching module and the device for including it |
| CN109498996A (en) * | 2018-12-19 | 2019-03-22 | 武汉奇致激光技术股份有限公司 | A kind of the multi-pole rf beauty instrument composition structure and constructive method of the combination of phase battle array |
| CN111494003A (en) * | 2020-06-01 | 2020-08-07 | 深圳市艾尔曼医疗电子仪器有限公司 | Digital minimally invasive high-frequency energy working system |
-
2021
- 2021-08-10 CN CN202110911546.2A patent/CN113679467A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070093806A1 (en) * | 1991-07-05 | 2007-04-26 | Desai Jawahar M | Device and Method for Multi-Phase Radio-Frequency Ablation |
| US5772659A (en) * | 1995-09-26 | 1998-06-30 | Valleylab Inc. | Electrosurgical generator power control circuit and method |
| US20070125662A1 (en) * | 2003-12-30 | 2007-06-07 | Image Guided Therapy Scientifique Unitec | Device for treating a biological tissue volume by localise hyperthermy |
| CN202207398U (en) * | 2011-07-22 | 2012-05-02 | 李娜 | Multi-contact radio frequency beauty instrument |
| CN106575953A (en) * | 2014-07-14 | 2017-04-19 | 柯惠有限合伙公司 | Dual band power amplifier circuit for microwave ablation |
| CN108233886A (en) * | 2018-03-12 | 2018-06-29 | 锐石创芯（深圳）科技有限公司 | Wideband impedance matching module and the device for including it |
| CN109498996A (en) * | 2018-12-19 | 2019-03-22 | 武汉奇致激光技术股份有限公司 | A kind of the multi-pole rf beauty instrument composition structure and constructive method of the combination of phase battle array |
| CN111494003A (en) * | 2020-06-01 | 2020-08-07 | 深圳市艾尔曼医疗电子仪器有限公司 | Digital minimally invasive high-frequency energy working system |
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Application publication date: 20211123 |