A system, stimulation method and evaluation method for skin electrical stimulation

Abstract

The present invention discloses a system and method for electrical skin stimulation. The system uses a plurality of electrodes to conduct electrical stimulation, detects the resistance of the skin between two adjacent electrodes, adjusts the power of the two adjacent electrodes, and calculates the total power of the two adjacent electrodes based on the change in resistance value, so that the heating value between the two adjacent electrodes is constant and the stimulation is automatically adjusted in real time. This ensures that the heating value of skin portions with different resistance values within the electrical stimulation range remains constant, and that the heating value of skin portions within the electrical stimulation range remains constant even when the resistance value changes, thereby improving the electrical stimulation effect on the skin. The present invention also provides an evaluation method for electrical skin stimulation.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a skin electrical stimulation technology. Background Art

[0002] Prior art electrical stimulation techniques for human skin all work by applying high-frequency energy to the skin. When the high-frequency current flows through the tissue, it generates Joule heating, which increases cell elasticity. For example, Chinese patent applications CN213758525U and CN112641436A disclose radiofrequency beauty devices. These devices only provide a design approach, but fail to provide a realistic stimulation effect. Another example is Chinese patent application CN109173068B, which describes a constant current output control method. This method primarily maintains a constant output current. However, during stimulation, the body's impedance varies with temperature, making a constant current ineffective. Furthermore, it is impossible to quantitatively evaluate whether the desired stimulation effect has been achieved. In the specific use of skin electrical stimulation, the skin impedance of different individuals, or even different skin areas within the same individual, varies and constantly changes. How can the body's impedance be adjusted to achieve a more uniform stimulation effect as temperature changes, while also providing a technical evaluation of the stimulation effect? The prior art lacks such technical means. Summary of the Invention

[0003] Purpose of the invention: In view of the above shortcomings, the present invention provides a skin electrical stimulation system, which achieves uniform stimulation of the area by adjusting the electrical stimulation energy output in real time.

[0004] The present invention also provides a method for skin electrical stimulation, which also achieves the above-mentioned purpose.

[0005] The present invention also provides a method for evaluating skin electrical stimulation, which can ultimately provide an evaluation of the actual stimulation effect through the combined stimulation of magnetic and electric stimulation, thereby achieving optimization of the stimulation effect.

[0006] Technical solution: To solve the above problems, the skin electrical stimulation system of the present invention can adopt the following technical solutions:

[0007] A system for electrically stimulating the skin comprises a plurality of electrodes for providing electrical stimulation; further comprising: a skin electrical parameter detection module for detecting the electrical resistance of the skin between two adjacent electrodes; the electrical resistance of the skin between each two adjacent electrodes being an independent resistance value; the resistance value having a plurality of values and all being recorded in the skin electrical parameter detection module; a power drive circuit for adjusting the power of two adjacent electrodes respectively; a control module for presetting the heating value between two adjacent electrodes; receiving the resistance of the skin between two adjacent electrodes detected by the skin electrical parameter detection module, and setting the total power of the two adjacent electrodes according to the change in the resistance value so that the heating value between the two adjacent electrodes is constant, and sending the calculated total power to the power drive circuit.

[0008] Corresponding to the above-mentioned system for electrical skin stimulation, the method for electrical skin stimulation provided by the present invention adopts the following technical solutions:

[0009] A method for electrically stimulating the skin comprises: energizing a plurality of electrodes for electrical stimulation, detecting the resistance of the skin between two adjacent electrodes; the resistance of the skin between each two adjacent electrodes is an independent resistance value; the resistance value has a plurality of independent resistance values, and each resistance value is recorded in a skin electrical parameter detection module; adjusting the power of the two adjacent electrodes; presetting the heating value between the two adjacent electrodes; receiving the resistance of the skin between the two adjacent electrodes detected by the skin electrical parameter detection module, calculating the total power of the two adjacent electrodes based on the change in the resistance value to keep the heating value between the two adjacent electrodes constant, and sending the calculated power parameter to a power drive circuit.

[0010] Compared with the existing technology, the system and method for electrical stimulation of the skin provided by the present invention have the following beneficial effects: it can automatically adjust the stimulation in real time, so that the heat generation of the skin parts with different resistance values within the electrical stimulation range is always constant, and the heat generation of the skin parts within the electrical stimulation range is kept constant when the resistance value changes, and the heat generation will not increase or decrease due to the change of resistance value, thereby improving the electrical stimulation effect on the skin.

[0011] The method for evaluating skin electrical stimulation provided by the present invention can adopt the following technical solutions:

[0012] A method for evaluating skin electrical stimulation uses a plurality of electrodes to conduct electrical stimulation, including: detecting the electrical resistance of the skin in the range between two adjacent electrodes; the electrical resistance of the skin in the range between each two adjacent electrodes is an independent resistance value; the resistance value has a plurality of values and is recorded in a skin electrical parameter detection module; presetting the heating value between two adjacent electrodes; receiving the resistance of the skin in the range between the two adjacent electrodes detected by the skin electrical parameter detection module, and calculating the power parameters of the two adjacent electrodes according to the change in the resistance value; keeping the heating value between the two adjacent electrodes constant, and sending the calculated power parameter to a power drive circuit; when detecting the resistance of the skin in the range between the two adjacent electrodes, detecting the previous resistance value of the skin in the range between the two adjacent electrodes, and detecting the next resistance value of the skin in the range between the two adjacent electrodes again after the electrical stimulation continues for a unit time; obtaining the difference between the previous resistance value and the next resistance value, and using the percentage of the difference relative to the previous resistance value as the evaluation result after electrical stimulation.

[0013] The beneficial effects of the above evaluation method are: it can automatically adjust the stimulation in real time, so that the heat generated by the skin parts with different resistance values within the electrical stimulation range is always constant; at the same time, it overcomes the single stimulation of previous radio frequency beauty devices and the lack of real-time stimulation comparison results. This system can output real-time and objective comparison data of the skin stimulation effect before and after stimulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the probe used in the present invention for electromagnetic stimulation of the skin.

[0015] Figure 2 yes Figure 1 Schematic diagram of the arrangement of electrodes in the probe.

[0016] Figure 3 Therefore Figure 2 Flowchart of four-electrode-based electrical stimulation.

[0017] Figure 4 It is a working block diagram of the skin electrical stimulation system. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0019] Example 1

[0020] Please combine Figures 1 to 4 As shown, this embodiment discloses a system for electrical stimulation of the skin. The output of the system is as follows Figure 1The figure shows a probe with magnetic stimulation and electrical stimulation. It includes several electrodes 1 for providing electrical stimulation and a magnetic stimulation system 2, and the magnetic stimulation system 2 is used to provide magnetic stimulation to the skin. However, in this system, electrical stimulation can be used independently without using a magnetic stimulation system. The requirements for electrical stimulation in this system are to adjust the heating value of the skin parts with different resistance values within the electrical stimulation range in real time to remain constant, and to keep the heating value constant when the resistance value of the skin parts within the electrical stimulation range changes, and not increase or decrease the heating value due to the change in resistance value. There are no similar requirements for magnetic stimulation. The electrodes include at least four, and the at least four electrodes form at least six groups of two adjacent electrodes, that is, six groups of adjacent electrode groups; the heating value of each group of adjacent motor groups is equal. When the resistance of the skin in the range between adjacent motor groups is different from the resistance of the skin in the range between other adjacent motor groups, the total power of the different adjacent motor groups is adjusted to make the heating value of each group of adjacent motor groups equal.

[0021] The system also includes:

[0022] The skin electrical parameter detection module is used to detect the resistance of the skin located between two adjacent electrodes; the resistance of the skin in the range between each two adjacent electrodes is an independent resistance value; the resistance value has several values and they are all recorded in the skin electrical parameter detection module; the skin electrical parameter detection module detects the previous resistance value of the skin located between two adjacent electrodes, and detects the next resistance value of the skin located between two adjacent electrodes again after the electrical stimulation lasts for a unit time; the next resistance value and the previous resistance value are both sent to the control module for the control module to calculate the change in resistance value.

[0023] Power driving circuit; used to adjust the power of two adjacent electrodes respectively.

[0024] The control module is configured to preset the heating value between two adjacent electrodes. It receives the skin resistance between the two adjacent electrodes as detected by the galvanic skin parameter detection module, adjusts the total power for the two adjacent electrodes based on the change in resistance to maintain a constant heating value between the two adjacent electrodes, and transmits the calculated total power to the power drive circuit. The control module also includes several heating value settings, which are used to preset the heating value between the two adjacent electrodes.

[0025] Example 2

[0026] like Figures 2 to 4As shown, corresponding to the above-mentioned embodiment 1, this embodiment provides a method for electrical stimulation of the skin, using a plurality of electrodes to energize for electrical stimulation, and detecting the resistance of the skin in the range between two adjacent electrodes; the resistance of the skin in the range between each two adjacent electrodes is an independent resistance value; the resistance value has several values and they are all recorded in the skin electrical parameter detection module; the power of the two adjacent electrodes is adjusted respectively; the heat generation between the two adjacent electrodes is preset; the resistance of the skin in the range between the two adjacent electrodes detected by the skin electrical parameter detection module is received, and the total power of the two adjacent electrodes is calculated according to the change in the resistance value to make the heat generation between the two adjacent electrodes constant, and the calculated power parameter is sent to the power driving circuit.

[0027] like Figure 2 As shown, this embodiment is described by taking four electrodes as an example.

[0028] Before the device starts to output energy, it is necessary to calibrate the initial value of the stimulation area and record the impedance between the electrodes in each area of each user as the basis for output energy and stimulation time. In order to optimize the stimulation effect, the heat obtained per unit impedance should be the same. The energy level V value of the stimulation is changed through the human-computer interaction interface. V is the equivalent level per unit impedance per unit time, ranging from 1 to 10. Assume that the impedance between the electrodes P1 and P2 in the customer's area A is Z 1-2 Since the impedance values of the same part of different customers and different parts of the same customer are different, the reactance value measured according to the initial value will be calculated based on the V value and the measured impedance value Z in the system. 1-2 , to adjust the power coefficient to achieve consistent output energy. That is, the actual output energy is Q 1-2 , Q 1-2 =V*Z 1-2 *t=K*P*t, P is the total power of two adjacent electrodes, K is a fixed value, which is related to the driving capacity of the system's power module. Assume K=200, because the range of V is 1 to 10; the actual time t during the stimulation process is set by the host computer. After each stimulation interval, the area Z will be 1-2 The impedance is collected and dynamically adjusted according to the actual test results, so the actual output energy will also be dynamically adjusted to achieve the optimization of stimulation and avoid inconsistency of stimulation effect. 1-2 =400Ω, V is set to 2, the actual output Q 1-2 =V*Z 1-2*t=K*P*t,P=800 / K=4W. Here, when K=200, Z=400, and because the maximum value of V is 10, the maximum value of P is 20W. When P=4W is used for treatment, after 15 minutes of stimulation, the system will adjust the actual output power according to the size of P. After the stimulation is completed, the impedance of this part is measured as Z. t(1-2) =395, the stimulation result for this area is (400-390) / 400*100%=2.5%; if the second stimulation Z 1-2 It becomes 395Ω. If the level V setting remains unchanged, P = 790 / K = 3.95W. Therefore, by adjusting P from 4W to 3.95W a second time, even when the skin impedance of the same area changes, the heating value of the electrode to the skin in that area remains constant by adjusting P.

[0029] like Figure 4 As shown, when the system starts to stimulate, electrical stimulation is performed first. After the electrical stimulation ends, magnetic stimulation can be optionally performed to enhance the activity and firming effect of the skin.

[0030] When electrical stimulation is performed independently without magnetic stimulation, there are n stimulation electrodes, and the impedance between each pair of electrodes is different. In this way, the system has a total impedance value of n(n-1) / 2 channels, where n is greater than or equal to 2. Taking 4 electrodes as an example, as shown in the block diagram 1-2 , Z 2-3 , Z 3-4 , Z 1-4 , Z 1-3 , Z 2-4 As shown, assuming that the value Z actually measured by the initial sampling circuit 1-2 =Z, Z 2-3 =Z, Z 3-4 =Z, Z 4-1 =Z, Z 4-2 =2Z,Z 1-3 =2Z, and the energy obtained per unit impedance is V. Therefore, the energy output of the corresponding channel's RF stimulation is V*Z, V*Z, V*Z, V*Z, V*2Z, and V*2Z, respectively. Once the system sets the RF therapy parameters and stimulates for a duration of t, the sampling module will collect real-time data on the load impedance between the corresponding universal electrodes and automatically adjust the real-time energy output. This continuous dynamic adjustment optimizes the regional stimulation effect, enhancing skin firmness and vitality. When the system completes stimulation, it collects the static impedance of the stimulated area and records it in the customer database.

[0031] Example 3

[0032] This embodiment provides a method for quantitatively evaluating electrical stimulation data in combination with the second embodiment. After stimulating the skin in the area where the electrode is located according to the electrical stimulation method of the second embodiment, it is assumed that the impedance after stimulation is Z L1-2 , Z L2-3 , Z L3-4 , Z L4-1 , Z L1-3 , Z L2-4 , then the quantitative evaluation of the stimulation effect on the stimulation area is: (Z 1-2 -Z L1-2 ) / Z 1-2 、(Z 2-3 -Z L2-3 ) / Z 2-3 、(Z 3-4 -Z L3-4 ) / Z 3-4 、(Z 1-4 -Z L4-1 ) / Z 4-1 、(Z 1-3 -Z L1-3 ) / Z 1-3 、(Z 2-4 -Z L2-4 ) / Z 2-4 This result indicates the degree of improvement in skin activity based on the original organic basis. Through this result, we can quantitatively obtain the real-time effect after skin stimulation, and more objectively reflect the effectiveness of the system when stimulating the skin. The following examples are given for illustration. The following data is obtained by using a certain part of the user of the stimulation system, P1 and P2 (P1 and P2 represent electrodes) Figure 2 The data after 30 minutes of stimulation with the electrode arrangement is given in the sampling module. In order to improve the accuracy of the evaluation, the sampling values under various excitation signals are given, namely data under 500kHZ, 250kHZ, and 50kHZ. The data under each frequency are obtained by taking the average value after multiple sampling. The formula is Z 500KHZ =(Z1+Z2+...+Zm) / m, where m represents the actual number of sampling points. The value of m can be set by the host computer. The actual measured data is as follows:

[0033] Frequency (KHZ) Impedance before stimulation (Ω) Post-stimulation impedance (Ω) Evaluation results (%) 50 265 255 3.77 250 240 230 4.1 500 225 215 4.4

[0034] The specific evaluation results are based on the average value of the three frequency effects as the final result, and the effect evaluation value is

[0035] η=(Z 500KHZ +Z 250KHZ +Z 50KHZ) / 3 = 4.09%. Therefore, when patient A was stimulated, the actual effect on the skin between electrodes P1 and P2 was improved by 4.09%. Therefore, this evaluation method provides data on the change in the actual resistance value of the skin between the two electrodes after electrical stimulation. This change data can be used as an evaluation criterion to assess the effect of the electrical stimulation of the skin according to the present invention; that is, a higher effect evaluation value indicates a better stimulation effect.

[0036] There are many methods and approaches to implement the technical solution of the present invention. The above is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A system for electrical stimulation of the skin, comprising a plurality of electrodes for providing electrical stimulation; characterized in that: Also includes: The skin electrical parameter detection module is used to detect the resistance of the skin between two adjacent electrodes; the resistance of the skin between each two adjacent electrodes is an independent resistance value; there are multiple resistance values, all of which are recorded in the skin electrical parameter detection module; Power driving circuit; used to adjust the power of two adjacent electrodes respectively; The control module is used to preset the heating value between two adjacent electrodes; receive the skin resistance between the two adjacent electrodes detected by the skin electrical parameter detection module, and set the total power of the two adjacent electrodes according to the change of the resistance value to keep the heating value between the two adjacent electrodes constant, and send the calculated total power to the power drive circuit; The electrodes include at least four electrodes, and the at least four electrodes form at least six groups of two adjacent electrodes, that is, six adjacent electrode groups are correspondingly set; the heat generation of each group of adjacent electrode groups is equal, and when the resistance of the skin in the range between adjacent electrode groups is different from the resistance of the skin in the range between other adjacent electrode groups, the total power of different adjacent electrode groups is adjusted to make the heat generation of each group of adjacent electrode groups equal.

2. The system for electrical skin stimulation according to claim 1, wherein: The skin electrical parameter detection module detects the previous resistance value of the skin located between two adjacent electrodes, and again detects the next resistance value of the skin located between two adjacent electrodes after the electrical stimulation lasts for a unit time; both the next resistance value and the previous resistance value are sent to the control module for the control module to calculate the change in resistance value.

3. The system for electrical skin stimulation according to claim 1, wherein: The control module is provided with a plurality of heating levels, and the heating level between two adjacent electrodes is preset by presetting the heating level.

4. The system for electrical skin stimulation according to claim 3, wherein: Also included is a magnetic stimulation system for providing magnetic stimulation to the skin.

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