CN-122005060-A - Radio frequency device and radio frequency energy control method

CN122005060ACN 122005060 ACN122005060 ACN 122005060ACN-122005060-A

Abstract

The invention provides a radio frequency device and a radio frequency energy control method. The radio frequency device mainly comprises a control unit, a radio frequency module, a temperature monitoring module, an impedance monitoring module, a touch display panel and the like, wherein the radio frequency module comprises a plurality of radio frequency sources with different frequencies and a plurality of groups of radio frequency electrodes. The radio frequency energy control method comprises the step of obtaining an equivalent thermal volume V of the radio frequency treatment skin tissue by the radio frequency electrode width D, the radio frequency electrode distance L and the radio frequency treatment depth H. The temperature T0 and the impedance R of the skin tissue are monitored in real time. The temperature difference Δt is calculated from the real-time temperature T0 and the set target temperature T1. The radio frequency output energy Q is calculated from the temperature difference Δt and the equivalent thermal volume V. The output energy Q is combined with the impedance R and the treatment time t to calculate the output voltage U, and the radio frequency module is controlled by the voltage. The invention enables the radio frequency therapeutic apparatus to meet wider therapeutic requirements and more accurate output energy control.

Inventors

GE XIAOYONG
WANG LIYING

Assignees

上海希格玛高技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. A method of radio frequency energy control comprising the steps of: Acquiring a radio frequency electrode width D and a radio frequency electrode spacing L; acquiring a radio frequency treatment depth H, a radio frequency treatment target temperature T1 and a radio frequency treatment duration T; acquiring the impedance R of an object subjected to radio frequency treatment; acquiring the temperature T0 of an object subjected to radio frequency treatment; Calculating an equivalent heat volume V of the radio frequency treatment according to the radio frequency electrode width D, the radio frequency electrode distance L and the radio frequency treatment depth H; calculating a temperature difference delta T according to the radio frequency treatment target temperature T1 and the object temperature T0; According to the temperature difference delta T and the equivalent thermal volume V, calculating radio frequency output energy Q; and calculating the radio frequency output voltage U according to the radio frequency output energy Q and the object impedance R.
2. The method of claim 1, wherein the equivalent thermal volume V is a cuboid and is calculated by the formula V = RF electrode width D x RF electrode spacing L x RF processing depth H.
3. The method of claim 2, wherein when there is an overlap in the plurality of equivalent thermal volumes, the volume of the overlap is subtracted.
4. The method of claim 1, wherein the RF output energy Q is calculated using the formula Q=kcρVΔT, where ρ is the object density, c is the object specific heat capacity, k is the influence factor, and V is the equivalent thermal volume.
5. The method of claim 1, wherein the rf output voltage U is calculated using the following equation q=u 2 t/R, where Q is the rf output energy, t is the rf processing time, and R is the object impedance.
6. A radio frequency device, comprising: A plurality of radio frequency sources, wherein each radio frequency source is operable to emit radio frequencies at a plurality of different frequencies; the radio frequency electrodes of each group can be switched and connected with different radio frequency sources; the input/output module is used for acquiring the radio frequency processing depth H, the radio frequency processing target temperature T1 and the radio frequency processing time length T; The temperature monitoring module is used for monitoring the temperature T0 of the object subjected to radio frequency treatment; the impedance monitoring module is used for monitoring the impedance R of the object subjected to radio frequency treatment; And the control unit is used for calculating the output voltage U and controlling the radio frequency source.
7. The radio frequency device according to claim 6, wherein the radio frequency processing depth H is obtained in one of two ways: (1) Inputting a radio frequency processing depth H through the input-output module; (2) And selecting a processing part through the input/output module, and matching the corresponding radio frequency processing depth H according to the processing part.
8. The radio frequency device of claim 6, wherein the temperature monitoring module comprises a plurality of temperature probes, each temperature probe disposed within a different radio frequency electrode; when the radio frequency electrode is in the radio frequency treatment process, the temperature measuring probe arranged in the radio frequency electrode monitors the object temperature T0 in real time, the impedance monitoring module monitors the object impedance R in real time, and the input/output module displays the object temperature T0 in real time.
9. The radio frequency device according to claim 8, wherein the radio frequency output voltage U of the radio frequency electrode is dynamically adjusted during the radio frequency processing according to the real-time monitoring data of the object impedance R and the object temperature T0, so as to ensure that the object temperature does not exceed the set target temperature T1 during the radio frequency processing.
10. The RF device of claim 6, further comprising a relay module, wherein the RF electrodes are grouped in pairs, and the RF source is switched for the RF electrodes by the relay module.

Description

Radio frequency device and radio frequency energy control method Technical Field The invention relates to a radio frequency device, in particular to a radio frequency device based on a multi-frequency and multi-source circuit and a radio frequency energy control method, and belongs to the technical field of radio frequency therapeutic equipment. Background The radio frequency therapeutic apparatus is a therapeutic apparatus which uses radio frequency current to act on pathological tissues of human body. The radio frequency therapeutic apparatus emits radio frequency to make polar molecules in human tissue move at high speed to generate heat (i.e. endogenous heat effect), and denature or coagulate protein at low temperature to lose activity, thereby realizing therapeutic effect. The radio frequency circuit is a high-frequency alternating circuit (300 KHz-300 GHz), a loop of a single radio frequency source is adopted, and no matter how many groups of discharge electrodes exist, the current flowing through the electrodes is in the same loop. It is known from ohm's law that the larger the current flowing between human tissues closer to the electrode in the same current circuit, the larger the heat generated by the same is. Thus when the treatment area is large, the energy is generally concentrated in the region where the electrode current loop is shorter, and the current density between the middle two electrodes as shown in fig. 1 is greater. In the same current loop, the current distribution is relatively uniform when there are only two electrodes (including negative plates) acting on human tissue. If there are more than two electrodes acting on human tissue, the problem of uneven current distribution between the electrodes needs to be considered. The multipole rf output control method in the market generally adopts the following technical paths. Patent application number 201410793852.0 discloses a radio frequency output device, which adopts a plurality of radio frequency sources and sequentially and correspondingly connects a plurality of groups of radio frequency electrodes through a plurality of radio frequency electrode driving circuits. The multiple groups of radio frequency electrodes act on human tissues, and the arrangement treatment of the radio frequency electrodes is carried out by adopting a mode of circularly conducting the multiple groups of radio frequency electrodes. The energy during treatment is calculated by the formula q=i 2 Rt, where Q is the energy, I is the current magnitude, R is the skin impedance, and t is the time over which the current flows. This scheme controls the energy output by controlling the current, but the current is susceptible to skin impedance. In addition, this solution does not allow free control of the depth of the radio frequency in the skin. The patent application number 202111666513.2 discloses a control method of a radio frequency therapeutic apparatus, a radio frequency therapeutic apparatus and a controller. The electrodes act on human tissues, and each group of electrodes corresponds to an independent radio frequency source in a multi-radio frequency source mode, so that the plurality of radio frequency signal output modules are controlled to adjust radio frequency power. This scheme only describes a method of temperature control based on temperature detection data of the electrode pads, and does not mention initial output power of each group of radio frequency output modules. From the safety point of view, the initial output power of each group of radio frequency output modules should be within a reasonable range, and under the condition that the distances among multiple groups of electrodes and the sizes of the electrodes are different, the output power which each group of electrodes should adapt to is also different, so that the accurate output of radio frequency energy can be realized. This patent does not disclose this aspect. Accordingly, there is a need for a method of controlling rf energy that is capable of more accurately performing power output for each set of rf sources. Disclosure of Invention The invention aims to solve the technical problems that when multi-frequency and multi-source energy is output, the output power of each group of radio frequency modules is not clear, and the power self-matching output and adjustment cannot be carried out according to the parameters such as the treatment depth, the treatment area, the target temperature and the like. In order to solve the technical problem, a first aspect of the present invention provides a radio frequency energy control method. The method comprises the following steps: Acquiring a radio frequency electrode width D and a radio frequency electrode spacing L; acquiring a radio frequency treatment depth H, a radio frequency treatment target temperature T1 and a radio frequency treatment duration T; acquiring the impedance R of an object subjected to radio frequency treatment; acquiring the temp