Adaptive skin impedance intermediate frequency physiotherapy instrument control system and control method

Abstract

The invention discloses a skin impedance self-adaptive intermediate frequency physiotherapy instrument control system and a skin impedance self-adaptive intermediate frequency physiotherapy instrument control method.The control system comprises an electrode output unit, a main control unit, a current and voltage real-time sampling unit and an impedance value calculation unit, and the current and voltage real-time sampling unit is used for sampling real-time current and voltage when the electrode output unit works; the collected real-time current and voltage are sent to an impedance value calculation unit; the impedance value calculation unit is used for receiving the current and the voltage sent by the electrode output unit and calculating an impedance value generated by the skin of the user to the current pulse signal according to the current and the voltage values; the main control unit is used for receiving the impedance values calculated by the impedance value calculation unit, taking the impedance value received for the first time as a standard value, taking each impedance value received after the first time as a current real-time impedance value, comparing the standard value with the current real-time impedance value, and finally, according to a comparison result, determining the impedance value of the current real-time impedance value. And an instruction for increasing, maintaining or reducing the voltage output related parameters is sent to the electrode output unit.

Description

Technical Field

[0001] This invention relates to the field of physiotherapy devices, specifically to a control system and control method for an adaptive skin impedance mid-frequency physiotherapy device. Background Technology

[0002] Mid-frequency physiotherapy devices include electrodes. During use, pulse signals are generated through electrode patches and applied to the skin, penetrating subcutaneous tissue and muscle nerves. This regulates nerve excitability and inhibition, activates the area around the lesion, and enhances local blood circulation and metabolism. Existing mid-frequency physiotherapy devices typically use electrical signals of fixed frequency and intensity for treatment. However, individual skin differences are significant, and skin resistance changes continuously due to factors such as emotions or ambient temperature during treatment. Using the original fixed frequency and intensity for treatment after changes in skin resistance will limit the therapeutic effect and user experience. Furthermore, existing devices cannot adjust the output voltage according to changes in resistance, causing fluctuations in the treatment current. This can easily lead to the output current exceeding the nerve stimulation threshold, causing irreversible nerve damage.

[0003] Chinese patent application number 202210093717 X discloses an adaptive frequency modulation system for a radiofrequency beauty device based on skin impedance. The system includes: an excitation electrode, which contacts the target skin during operation to generate a radiofrequency electrical signal; a measurement electrode, which contacts the target skin during operation to measure the voltage vector of the target skin; and a central processing unit, connected to both the excitation and measurement electrodes, used to determine the current impedance of the target skin based on the voltage vector, determine the radiofrequency frequency and amplitude based on the impedance, and generate a control signal. The control signal is used to adjust the frequency and amplitude of the radiofrequency electrical signal based on the radiofrequency frequency and amplitude. This adaptive system measures the voltage applied to the user's skin in real time, determines the skin's impedance based on the measured voltage, and ultimately adjusts the radiofrequency frequency and amplitude based on the impedance. However, because different people have different sensitivities and kinetic responses to pulse intensity, the required pulse intensity also varies. If adjustments are not made according to different individuals, the treatment effect will be insufficient. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, the present invention aims to provide an adaptive skin impedance mid-frequency physiotherapy instrument control system and control method, thereby solving the problems of existing physiotherapy instruments being unable to adaptively adjust the output voltage according to different populations, resulting in poor treatment effects and the easy generation of overcurrent during treatment, which can cause nerve damage.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An adaptive skin impedance mid-frequency physiotherapy device control system includes an electrode output unit, a main control unit, a real-time current and voltage sampling unit, and an impedance value calculation unit. The real-time current and voltage sampling unit is electrically connected to the electrode output unit and is used to collect the real-time current and voltage of the electrode output unit during operation, and send the collected real-time current and voltage to the impedance value calculation unit. The impedance value calculation unit is electrically connected to the real-time current and voltage sampling unit and is used to receive the current and voltage emitted by the electrode output unit, and calculate the impedance value of the user's skin to the current pulse signal based on the current and voltage values. The main control unit is connected to the electronic calculation unit and the electrode output unit, and is used to receive the impedance value calculated by the impedance value calculation unit, and convert the first received impedance value into an impedance value. The first impedance value is used as the standard value. Each subsequent impedance value received is used as the current real-time impedance value. The standard value is compared with the current real-time impedance value. Based on the comparison result, an instruction to increase, maintain, or decrease the voltage output value is sent to the electrode output unit. If the current real-time impedance value is greater than the standard value by a certain degree, an instruction to increase the voltage output value is sent to the electrode output unit. If the current real-time impedance value is less than the standard value by a certain degree, an instruction to decrease the voltage output value is sent to the electrode output unit. If the current real-time impedance value is approximately equal to the standard value, the current output voltage continues to be output. The electrode output unit is connected to the main control unit and receives the voltage output instruction from the main control unit, adjusts the voltage output magnitude, and emits corresponding pulse waves. In this way, the impedance value calculated from the first acquisition of the current and voltage applied to the user by the electrode output unit is used as the standard value. Then, after acquiring the current and voltage signals from each subsequent acquisition, the current impedance value is calculated. By comparing the current impedance value with the standard value, it is possible to determine whether there is a difference between the current impedance value and the standard value, and the magnitude of the difference, thereby adjusting the output voltage of the electrode output unit in real time. The standard value set in this method serves as a reference for subsequent impedance measurements. During the detection process, if the current impedance increases to a certain extent, the corresponding operating current decreases, failing to achieve the desired therapeutic effect, thus requiring an increase in output voltage. Conversely, if the current impedance decreases to a certain extent, the operating current increases, potentially leading to overcurrent, thus requiring a decrease in output voltage to avoid overcurrent and effectively prevent nerve damage. This method uses the user's initial skin impedance as a standard value for each use and compares it with subsequent changes in skin impedance for adjustment. Different people have different standard values ​​during real-time use, allowing for adjustments tailored to individual users. Furthermore, even for the same user, the standard value may vary depending on the treatment site or the skin surface condition of the same site. By acquiring the standard value first and then comparing impedance values ​​multiple times, this method can adapt to different users or different sites and skin conditions within the same user.

[0006] Furthermore, the electrode output unit includes a D / A converter, an intermediate frequency filter, an isolation circuit, an adjustable amplifier circuit, and an electrode assembly connected in sequence. The real-time current and voltage sampling unit includes a current acquisition unit and a voltage acquisition unit connected in parallel between the adjustable amplifier circuit and the electrode assembly. These units are used to detect the current flowing through the user's skin and the voltage acting on the user's skin, respectively, and are communicatively connected to the main control unit, sending the detected current and voltage signals to the main control unit. Thus, the electrode output unit can convert the signal from the main control unit to analog-to-digital conversion, filter, isolate, and then amplify and output it. The main control unit generates an AC signal of a specific frequency and amplitude, which is processed by the electrode output unit and applied to the excitation electrode in contact with the user's skin. By measuring the sampled voltage and current, the user's skin impedance is detected. The isolation circuit provides protective measures for the medical device, preventing the risk of electric shock.

[0007] Furthermore, it also includes a power supply boost unit, which comprises a power supply module, a second isolation circuit, and a boost module connected in a primary manner. The boost module is electrically connected to the input terminal of the adjustable amplifier circuit, used to boost the voltage of the power supply module to the voltage required for circuit operation before outputting it to the adjustable amplifier circuit. The first power supply circuit of the power supply module is connected to the boost module, and the second power supply circuit is connected to the main control unit. In this way, the power supply module can provide a stable current to the main control unit and the electrode output unit.

[0008] Furthermore, a prompting unit is included. This prompting unit is located between the real-time current and voltage sampling unit and the impedance value calculation unit, and is communicatively connected to both units. It receives real-time current signals from the current and voltage sampling unit, determines the current current value based on the received signals, and compares the current current value with a set threshold. If the current current value is greater than the set threshold, the measured output current value is determined to be valid. If the current current value is less than or equal to the set threshold, the measured output current value is determined to be due to noise, and a prompt is sent to the user indicating that the electrode is not being worn effectively. A signal is also sent to the impedance value calculation unit to not perform impedance value calculation. Thus, by setting up the prompting unit, it is possible to determine whether the user is wearing the electrode patch correctly, thereby preventing impedance value calculation and issuing a corresponding prompt when the wear is invalid, ensuring the user's treatment effect.

[0009] Furthermore, the main control unit is also used to determine the cleanliness of the electrode patch based on the ratio of the user's real-time impedance value to the standard value. Specifically, if the user's real-time impedance value exceeds twice the standard value, it is determined that the electrode patch application has deteriorated, and a prompt is issued to the user to clean or replace the electrode patch. In this way, the main control unit can determine the application condition of the electrode patch based on the ratio of the user's real-time impedance value to the standard value, and thus replace or clean the electrode patch after it deteriorates (such as peeling edges or excessive impurities affecting treatment), to ensure sufficient therapeutic effect.

[0010] Furthermore, the main control unit includes a storage unit and a comparison unit. The storage unit is connected to the impedance value calculation unit and is used to receive the calculation results of the impedance value calculation unit, the current user's user data, and existing user group data. The comparison unit is communicatively connected to the storage unit and is used to compare the standard value stored in the storage unit with the current real-time impedance value and output corresponding instructions based on the comparison result. It is also used to match the current user data with the corresponding category of user group data and output a corresponding voltage output signal to the electrode output unit based on the impedance value range displayed by the matched user group data. In this way, in addition to storing the impedance value calculation results of the current user, the storage unit can also provide the comparison unit with the current user data and user group data, so that the comparison unit can compare the current user data with the existing user group data, thereby quickly finding the user group corresponding to the current user, and quickly determining the impedance value range that the current user's skin can exhibit after being subjected to an intermediate frequency electrical signal based on the impedance value range displayed by the corresponding existing user group, and further determining the voltage output range applicable to the user. This enables the measurement module used by the real-time current and voltage sampling unit to achieve higher measurement accuracy within the user's impedance value range, and to more quickly determine the standard value of the user's skin impedance under the current usage state.

[0011] A method for controlling a mid-frequency physiotherapy device with adaptive skin impedance includes: S1, attaching the electrode patch of the electrode output unit to the user's skin, setting the pulse output level of the physiotherapy device, acquiring the current and voltage emitted by the electrode output unit through a real-time current and voltage sampling unit, calculating the skin impedance of the pulse signal acting on the user, and using this impedance value as the standard value for pulse output; S2, continuously sampling the current and voltage received by the user using the real-time current and voltage sampling unit, calculating the user's skin impedance during each real-time sampling based on the acquired current and voltage values, comparing the calculated current impedance value with the standard value, and finally outputting a voltage signal of corresponding intensity and / or base / modulation frequency to the electrode output unit based on the comparison result. If the current impedance value is greater than the standard value and the excess portion reaches 5%-15% of the standard value (this varies depending on the standard impedance value; the same applies to the ranges below), an instruction to increase the voltage output value is sent to the electrode output unit. If the current impedance value is less than the standard value and the decrease reaches 5%-15% of the standard value, an instruction to decrease the voltage output value is sent to the electrode output unit. If the current impedance value is close to the standard value and the deviation is less than ±5%, the current output voltage continues to be output. If the current impedance value is greater than the standard value and the excess portion reaches 30%~60% of the standard value, the output signal modulation frequency or fundamental frequency decreases. If the current impedance value is less than the standard value and the decrease portion reaches 15%~30% of the standard value, the output signal modulation frequency or fundamental frequency increases. If the current impedance value is greater than the standard value and the excess portion reaches 100% of the standard value, it is determined that the electrode patch application is abnormal, and a prompt to the user to confirm the electrode patch status is issued. In this way, after calculating the impedance value based on the initial monitoring, this impedance value is used as the standard value. Then, by continuously monitoring the current and voltage applied to the user, the current and voltage values ​​monitored each time are calculated to determine the current impedance value. This allows for continuous comparison between the current impedance value and the standard value, determining whether the user's impedance changes due to external factors during treatment. If an impedance change occurs, the voltage output value and output frequency parameters are adjusted based on the comparison results. This effectively ensures that the operating current remains approximately the current value selected after intensity level selection during treatment, preventing overcurrent. Since both the standard value and the current impedance value are based on the same user's impedance data, the detected standard value will differ for different users, achieving a treatment effect suitable for different users.

[0012] Furthermore, after collecting the current and voltage flowing through the user, the system first determines whether the current sampled current value is valid. If the current current value is greater than a set threshold, the current output current is considered valid, and the system proceeds directly to the next step of impedance value calculation. If the collected current value is less than or equal to the set threshold, impedance value calculation is not performed, and a warning message indicating that the electrodes are not being worn is issued. In this way, by separately determining the validity of the current value during treatment, it is possible to clearly determine whether the user is wearing the electrodes correctly.

[0013] Furthermore, before collecting standard values, user group data is collected first. Users are then categorized based on this data, and current usage data tables are created for each category. Finally, after the current user's data is entered, the current user is matched to the corresponding category's current usage data table to determine the current user's impedance range and provide suggestions on the output signal strength level of the physiotherapy device. In this way, by first collecting existing user group data and categorizing users into different groups, and then quickly matching the current user to the corresponding group after inputting data, the impedance range of the current user's skin is determined based on the impedance range of the existing user group. This allows for the calculation of the suitable output voltage for the current user, the determination of the corresponding level, and the provision of level selection suggestions. This enables the current user to quickly determine the suitable output voltage and corresponding level, and to quickly determine their standard impedance value.

[0014] Furthermore, the user data includes gender, age, weight, body fat percentage, and skin type, which includes dry, oily, and normal skin. Thus, each piece of data collected will have a certain impact on the impedance value. Therefore, the impedance value range obtained after collecting the above data and classifying the above-mentioned population can clearly reflect the impedance range of this user group, providing sufficient basis for users. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the control system of the intermediate frequency physiotherapy device in the embodiment; Figure 2 This is a circuit connection diagram of the control system of the intermediate frequency physiotherapy device in the embodiment; Figure 3 This is a flowchart of the control method for the intermediate frequency physiotherapy device in the embodiment; Figure 4 This is a detailed flowchart of the control method for the intermediate frequency physiotherapy device in the embodiment; Figure 5 This is a current usage data table for one of the user groups in the embodiment. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] Existing intermediate frequency physiotherapy devices cannot adaptively adjust to different users' real-time usage conditions during operation. However, the user's impedance value changes constantly during use. If the output voltage of the electrodes cannot be adjusted in real time during use, overcurrent can easily occur, causing nerve damage to the user.

[0019] Example 1 like Figure 1As shown, the adaptive skin impedance mid-frequency physiotherapy instrument control system provided in this embodiment includes an electrode output unit 1, a main control unit 5, a real-time current and voltage sampling unit 2, and an impedance value calculation unit 4. The real-time current and voltage sampling unit 2 is electrically connected to the electrode output unit 1 and is used to collect the real-time current and voltage of the electrode output unit 1 during operation, and send the collected real-time current and voltage to the impedance value calculation unit 4. The impedance value calculation unit 4 is electrically connected to the real-time current and voltage sampling unit 2 and is used to receive the current and voltage emitted by the electrode output unit 1, and calculate the impedance value exhibited by the user's skin under the current pulse signal based on the current and voltage values. The main control unit 5 is connected to the electronic calculation unit and the electrode output unit 1, and is used to receive the impedance value calculated by the impedance value calculation unit 4. The first received impedance value is used as the standard value, and each subsequent received impedance value is used as the current real-time impedance value. The standard value is compared with the current real-time impedance value, and finally, based on the comparison result, an instruction is sent to the electrode output unit 1 to increase, maintain, or decrease the voltage output value. When the comparison result shows that the current real-time impedance value is greater than the standard value, an instruction to increase the voltage output value is sent to electrode output unit 1. If the current real-time impedance value is less than the standard value, an instruction to decrease the voltage output value is sent to electrode output unit 1. If the current real-time impedance value is equal to the standard value, the current output voltage continues to be output. The electrode output unit 1 is connected to the main control unit 5 and is used to receive the voltage output instruction sent by the main control unit 5, adjust the voltage output magnitude, and send out corresponding pulse waves. The main control unit 5 includes a storage unit and a comparison unit. The storage unit is connected to the impedance value calculation unit 4 and is used to receive the calculation results of the impedance value calculation unit 4, the current user's user data, and existing user group data. The comparison unit is communicatively connected to the storage unit and is used to compare the standard value stored in the storage unit with the current real-time impedance value and output corresponding instructions according to the comparison result. It is also used to match the current user data with the corresponding category of user group data and output corresponding voltage output signals to electrode output unit 1 according to the impedance value range displayed by the matched user group data. In this way, the current and voltage applied to the user by the electrode output unit in the first instance are collected, and the calculated impedance value is used as a standard value. Then, after each subsequent current and voltage signal is collected, the current impedance value is calculated, and the current impedance value is compared with the standard value. This allows the system to determine whether there is a difference between the current impedance value and the standard value, and the magnitude of the difference, thereby adjusting the output voltage of the electrode output unit in real time. The standard value set in this method can serve as a reference for subsequent impedance measurements. During the detection process, if the current impedance increases to a certain extent, the corresponding operating current decreases, thus requiring an increase in the output voltage. Conversely, if the current impedance decreases to a certain extent, the operating current increases, which can easily lead to overcurrent, requiring a decrease in the output voltage to avoid overcurrent and effectively prevent damage to the nerves.The above method uses the user's initial skin impedance as a standard value for each use, and compares it with the standard value when the skin impedance changes subsequently, thus making adjustments accordingly. Different people have different standard values ​​during real-time use, allowing for adjustments tailored to different users. Furthermore, even for the same user, the standard value may vary due to different treatment sites or differences in skin surface conditions at the same site. By acquiring the standard value first and then comparing impedance values ​​multiple times during each application, it can adapt to different users or different skin conditions of the same user. In addition to storing the current user's impedance value calculation results, the main control unit 5's storage unit also provides the comparison unit with current user data and user group data. This allows the comparison unit to compare the current user data with existing user group data, quickly identify the user group corresponding to the current user, and rapidly determine the range of impedance values ​​that the current user can receive based on the impedance value range displayed for that user group. This further determines the applicable voltage output for the user, ensuring that the first impedance value collected by the real-time current and voltage sampling unit 2 is the appropriate impedance value for the current user, quickly finding the standard value that the user can receive.

[0020] like Figure 2 As shown, the electrode output unit 1 includes a D / A converter, an intermediate frequency filter, an isolation circuit, an adjustable amplifier circuit, and an electrode assembly connected in sequence. The real-time current and voltage sampling unit 2 includes a current acquisition unit and a voltage acquisition unit connected in parallel between the adjustable amplifier circuit and the electrode assembly. The current acquisition unit and the voltage acquisition unit are used to detect the current flowing through the user's skin and the voltage acting on the user's skin, respectively. They are communicatively connected to the main control unit 5 and send the detected current and voltage signals to the main control unit 5. The electrode assembly includes a first electrode and a second electrode. In this way, the electrode output unit 1 can convert the signal sent by the main control unit 5 from digital to analog, filter, isolate, and then amplify and output it. The main control unit 5 generates an AC signal of a specific frequency and amplitude, applies it to the excitation electrode in contact with the user's skin, and detects the user's skin impedance by measuring the sampled voltage and current. The isolation circuit can be used to provide protection for the medical device and prevent the risk of electric shock.

[0021] like Figure 1As shown, it also includes a power supply boost unit, which comprises a power supply module, a second isolation circuit, and a boost module connected in a primary manner. The boost module is electrically connected to the input terminal of the adjustable amplifier circuit and is used to boost the voltage of the power supply module to the voltage required for circuit operation before outputting it to the adjustable amplifier circuit. The first power supply circuit of the power supply module is connected to the boost module, and the second power supply circuit is connected to the main control unit 5. In this way, the power supply module can provide a stable current to the main control unit 5 and the electrode output unit 1. Specifically, in this embodiment, the power supply module is a battery, and the boost module is used to boost the battery voltage to the voltage required for circuit operation. A charging circuit is connected to the battery for charging the battery.

[0022] Furthermore, a prompting unit 3 is included. This prompting unit 3 is located between the real-time current and voltage sampling unit 2 and the impedance calculation unit 4, and is communicatively connected to both units. It receives the real-time current signal from the current and voltage sampling unit 2, determines the current value based on the received signal, and compares the current value with a set threshold. If the current value is greater than the set threshold, the measured output current value is determined to be valid. If the current value is less than or equal to the set threshold, the measured output current value is determined to be due to noise, and a prompt is sent to the user indicating that the electrode patch is not being worn correctly. A signal is also sent to the impedance calculation unit to not perform impedance calculation. Thus, by setting up the prompting unit, it is possible to determine whether the user is wearing the electrode patch correctly, thereby preventing impedance calculation when the patch is not worn correctly and issuing a corresponding prompt to ensure the user's treatment effect.

[0023] Furthermore, the main control unit is also used to determine the cleanliness of the electrode patch based on the ratio of the user's real-time impedance value to the standard value. Specifically, if the user's real-time impedance value exceeds twice the standard value, it is determined that the electrode patch application has deteriorated, and a prompt is issued to the user to clean or replace the electrode patch. In this way, the main control unit can determine the application condition of the electrode patch based on the ratio of the user's real-time impedance value to the standard value, and thus replace or clean the electrode patch after it deteriorates (such as peeling edges or excessive impurities affecting treatment), to ensure sufficient therapeutic effect.

[0024] Example 2 like Figure 3As shown, the adaptive skin impedance mid-frequency physiotherapy device control method provided in this embodiment includes: S1, attaching the electrode patch of the electrode output unit to the user's skin, and after setting the pulse output level of the physiotherapy device, acquiring the current and voltage emitted by the current electrode output unit through the real-time current and voltage sampling unit, and calculating the skin impedance of the pulse signal acting on the user, using the impedance value as the standard value of the pulse output; S2, continuously sampling the current and voltage received by the user using the real-time current and voltage sampling unit, calculating the user's skin impedance in each real-time sampling process based on the current and voltage values ​​acquired each time, then comparing the calculated current impedance value with the standard value, and finally outputting the pulse output to the electrode output unit based on the comparison result. The system outputs a voltage signal with the required strength and / or base / modulation frequency. If the current impedance value is greater than the standard value and the excess is 5%-15% of the standard value, an instruction to increase the voltage output value is sent to the electrode output unit. If the current impedance value is less than the standard value and the reduction is 5%-15% of the standard value, an instruction to decrease the voltage output value is sent to the electrode output unit. If the current impedance value is close to the standard value and the deviation is less than ±5%, the current output voltage continues to be output. If the current impedance value is greater than the standard value and the excess is 30%-60% of the standard value, the output signal modulation frequency or base frequency decreases. If the current impedance value is less than the standard value and the reduction is 15%-30% of the standard value, the output signal modulation frequency or base frequency increases. If the current impedance value is greater than the standard value and the excess is 100% of the standard value, an abnormality in the electrode patch application is determined, and a prompt to the user to confirm the electrode patch status is issued. In this way, the impedance value calculated after the first test is used as the standard value. Then, the current and voltage acting on the user are continuously monitored, and the current and voltage detected each time are used to calculate the current impedance value. This allows for continuous comparison between the standard value and the current impedance value, determining whether the user's impedance changes due to external factors during treatment. If the impedance value changes, the voltage output value and output frequency are adjusted based on the comparison results, effectively ensuring that the user remains within the standard value during treatment and preventing overcurrent. Since the standard value and the current impedance value are the same user's impedance data, the detected standard value will differ for different users, achieving a treatment effect that adapts to different users.

[0025] During use, if the user wears the electrode patch unstablely or if the adhesive surface accumulates impurities after prolonged use, the treatment effect will be affected. To effectively detect and control these phenomena, after collecting the current and voltage flowing through the user, the system first determines whether the current sampled current value is valid. If the current value is greater than a set threshold, the measured output current value is considered valid, and the process proceeds directly to the next step of impedance value calculation. If the collected current value is less than the set threshold, an electrode not being worn warning is issued, and impedance value calculation is not performed. If the collected current value is greater than the set threshold and exceeds it by more than 50%, the electrode patch adhesion is considered deteriorated, and the user is prompted to clean or replace the electrode patch. In this way, by separately judging the validity of the current value during treatment, it is possible to determine whether the user is wearing the electrode patch correctly and whether the electrode patch has excessive defects such as peeling edges, dust, or dander that could affect treatment. If any of these conditions occur, the user can be alerted accordingly to avoid poor treatment results due to improper use.

[0026] Specifically, the above prompts can be delivered via SMS, voice, or on-screen display.

[0027] like Figure 4 As shown, before collecting standard values, user group data is collected first. Users are then categorized based on this data, and current usage data tables for each category are created. Finally, after the current user's data is entered, the current user is matched to the corresponding category's current usage data table to determine the current user's impedance range and provide a suggested output signal strength level for the physiotherapy device. In this way, by first collecting existing user group data and categorizing users into different groups, and then quickly matching the current user to the corresponding group after inputting data, the impedance range generally acceptable to the current user can be determined based on the existing user group's impedance range. This allows for the calculation of the suitable output voltage for the current user, and subsequently, the corresponding level is determined based on the output voltage. A level selection suggestion is then provided to the user, enabling them to quickly determine the appropriate output voltage and level, thus rapidly establishing the standard value.

[0028] Furthermore, the user data includes gender, age, weight, body fat percentage, and skin type, which includes dry, oily, and normal skin. Thus, each piece of data collected will have a certain impact on the impedance value. Therefore, the impedance value range obtained after collecting the above data and classifying the above-mentioned population can clearly reflect the impedance range of this user group, providing sufficient basis for users.

[0029] For ease of understanding, the following describes how different users use the intermediate frequency physiotherapy device in this embodiment.

[0030] User 1, female, 36 years old, with dry skin. Before use, the user data was first entered into the system. Based on the user information, the user was categorized in the user group data table. The potential range of this user's skin impedance is 5000-15000Ω, and an intensity level of 13-15 (corresponding to approximately 7-8V) is recommended. The user's treatment area was the shoulder, and the actual intensity setting used was level 13. The initial measurement of the user's shoulder skin showed a standard value of 7800Ω, with the applied current being a low-to-mid-frequency modulated wave, a mid-frequency frequency of 2kHz, and a low-frequency modulation frequency of 1-150Hz. This standard value falls within the impedance range of the user group category. During use, the user's impedance value continuously changed, ranging from 7300-7800Ω. This change may be due to skin heating and sweating caused by the electrode patch being applied for an extended period. The impedance value on the user's shoulder remained stable during use, with a change of less than 5%, indicating that the electrode patch application remained largely unchanged.

[0031] User 2, female, 43 years old, with dry skin. According to the user group classification, this user's potential skin impedance range is 5000-15000Ω, and the recommended intensity level is 13-15 (corresponding to approximately 7-8V). The user treated her arm, and the actual intensity setting used was level 19 (corresponding to approximately 10V; this user's skin has high tolerance to electrical stimulation). The initial measurement of the user's shoulder skin yielded a standard value of 9300Ω, with the applied current being a low-to-mid-frequency modulated wave, a mid-frequency frequency of 2kHz, and a low-frequency modulation frequency of 1-150Hz. This standard value falls within the impedance range of the user group classification. During use, the user's impedance value continuously changed, ranging from 9300-10800Ω. This change may be due to the greater curvature of the arm skin, making it difficult to adhere properly, and the edges of the electrode patch lifting, resulting in a reduced contact area. During use, the user's arm impedance value increased by 16% before stabilizing. Based on the comparison between the real-time value and the standard value, the main control unit issued a command to the electrode output unit to increase the voltage output value. The actual output voltage was approximately 10V * 110% = 11V (for safety reasons, the gain adjustment is not entirely equivalent to the rate of change of impedance value). Under the standard value, the user's skin current was approximately 1.07mA. When the impedance value increased, this current dropped to 0.93mA. However, after the main control unit adjusted the output value based on the impedance change, the current value returned to 1.02mA, which is closer to the current intensity selected by User 1 when they started adjusting the intensity. Therefore, after User 2's electrode edge lifted, the intensity of the treatment current they felt did not decrease significantly.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A control system for an adaptive skin impedance mid-frequency physiotherapy device, comprising an electrode output unit and a main control unit, characterized in that, It also includes a real-time current and voltage sampling unit and an impedance calculation unit. The real-time current and voltage sampling unit is electrically connected to the electrode output unit and is used to collect the real-time current and voltage when the electrode output unit is working, and send the collected real-time current and voltage to the impedance calculation unit. The impedance calculation unit is electrically connected to the real-time current and voltage sampling unit and is used to receive the current and voltage emitted by the electrode output unit, and calculate the impedance value exhibited by the user's skin under the current pulse signal based on the current and voltage values. The main control unit is connected to the electronic calculation unit and the electrode output unit, and is used to receive the impedance value calculated by the impedance calculation unit, and use the first received impedance value as the standard value, and the second and subsequent values... Each received impedance value is used as the current real-time impedance value. The current real-time impedance value is compared with the standard value. Finally, based on the comparison result, an instruction to increase, maintain, or decrease the voltage output value is sent to the electrode output unit. If the comparison result is that the current real-time impedance value is greater than the standard value, an instruction to increase the voltage output value is sent to the electrode output unit. If the current real-time impedance value is less than the standard value, an instruction to decrease the voltage output value is sent to the electrode output unit. If the current real-time impedance value is close to the standard value, the current output voltage continues to be output. The electrode output unit is connected to the main control unit and is used to receive the voltage output instruction sent by the main control unit, adjust the voltage output magnitude, and send out corresponding pulse waves.

2. The adaptive skin impedance mid-frequency physiotherapy instrument control system according to claim 1, characterized in that, The electrode output unit includes a D / A converter, an intermediate frequency filter, an isolation circuit, an adjustable amplifier circuit, and an electrode assembly connected in sequence. The real-time current and voltage sampling unit includes a current acquisition unit and a voltage acquisition unit connected in parallel between the adjustable amplifier circuit and the electrode assembly. The current acquisition unit and the voltage acquisition unit are used to detect the current flowing through the user's skin and the voltage acting on the user's skin, respectively. They are connected to the main control unit for communication and send the detected current and voltage signals to the main control unit.

3. The adaptive skin impedance mid-frequency physiotherapy instrument control system according to claim 2, characterized in that, It also includes a power supply boost unit, which includes a power supply module, a second isolation circuit, and a boost module that are electrically connected in the primary circuit. The boost module is electrically connected to the input terminal of the adjustable amplifier circuit and is used to boost the voltage of the power supply module to the voltage required for the circuit to operate before outputting it to the adjustable amplifier circuit. The first power supply circuit of the power supply module is connected to the boost module, and the second power supply circuit is connected to the main control unit.

4. The adaptive skin impedance mid-frequency physiotherapy instrument control system according to claim 1, 2, or 3, characterized in that, It also includes a prompting unit, which is located between the real-time current and voltage sampling unit and the impedance value calculation unit, and is communicatively connected to the real-time current and voltage sampling unit and the impedance value calculation unit. The prompting unit is used to receive the real-time current signal from the current and voltage sampling unit, and after determining the current current value based on the received current signal, compare the current current value with a set threshold. If the current current value is greater than the set threshold, the measured output current value is determined to be a valid value. If the current current value is less than or equal to the set threshold, the measured output current value is determined to be caused by noise signal, and a prompt is issued to the user that the electrode is not being worn effectively. The prompting unit also issues a signal to the impedance value calculation unit that impedance value calculation will not be performed.

5. The adaptive skin impedance mid-frequency physiotherapy instrument control system according to claim 4, characterized in that, The main control unit is also used to determine the cleanliness of the electrode patch based on the ratio of the user's real-time impedance value to the standard value. Specifically, if the user's real-time impedance value exceeds twice the standard value, it is determined that the electrode patch application has deteriorated, and a prompt is issued to the user to clean or replace the electrode patch.

6. The adaptive skin impedance mid-frequency physiotherapy instrument control system according to claim 4, characterized in that... The main control unit includes a storage unit and a comparison unit. The storage unit is connected to the impedance value calculation unit and is used to receive the calculation results of the impedance value calculation unit, the current user's user data, and existing user group data. The comparison unit is communicatively connected to the storage unit and is used to compare the standard value stored in the storage unit with the current real-time impedance value and output corresponding instructions based on the comparison result. It is also used to match the current user data with the corresponding category of user group data and output a corresponding voltage output signal to the electrode output unit based on the impedance value range displayed by the matched user group data.

7. A method for controlling a mid-frequency physiotherapy device that adapts to skin impedance, characterized in that, include: S1, after attaching the electrode patch of the electrode output unit to the user's skin and setting the pulse output level of the physiotherapy device, the current and voltage emitted by the electrode output unit are collected by the real-time current and voltage sampling unit, and the impedance of the pulse signal acting on the user's skin is calculated. This impedance value is used as the standard value for pulse output. S2, the real-time current and voltage sampling unit continuously samples the current and voltage received by the user. Based on each collected current and voltage value, the user's skin impedance is calculated for each real-time sampling process. The calculated current impedance value is then compared with the standard value. Finally, based on the comparison result, the corresponding intensity and / or base / modulation frequency is output to the electrode output unit. Voltage signal; if the current impedance value is greater than the standard value and the excess reaches 5%-15% of the standard value, an instruction to increase the voltage output value is sent to the electrode output unit; if the current impedance value is less than the standard value and the reduction reaches 5%-15% of the standard value, an instruction to decrease the voltage output value is sent to the electrode output unit; if the current impedance value is close to the standard value and the deviation is less than ±5%, the output continues according to the current output voltage; if the current impedance value is greater than the standard value and the excess reaches 30%-60% of the standard value, the output signal modulation frequency or fundamental frequency decreases; if the current impedance value is less than the standard value and the reduction reaches 15%-30% of the standard value, the output signal modulation frequency or fundamental frequency increases. If the current impedance value is greater than the standard value and the excess reaches 100% of the standard value, it is determined that the electrode patch application is abnormal, and a prompt will be sent to the user to confirm the status of the electrode patch.

8. The adaptive skin impedance mid-frequency physiotherapy device control method according to claim 7, characterized in that, After collecting the current and voltage flowing through the user, the system first determines whether the current sampled current value is valid. If the current current value is greater than the set judgment threshold, the current output current is determined to be valid, and the system directly proceeds to the next step of impedance value calculation. If the collected current value is less than or equal to the set threshold, impedance value calculation is not performed, and a prompt indicating that the electrodes are not being worn is issued.

9. The adaptive skin impedance mid-frequency physiotherapy device control method according to claim 7 or 8, characterized in that, Before collecting standard values, user group data is collected first. After classifying users according to the user group data, a current usage data table for each category of users is drawn. Finally, after the current user data is entered, the current user is matched to the current usage data table of the corresponding category of users, thereby determining the impedance value range of the current user and giving a suggestion on the output signal strength level of the physiotherapy device for the current user.

10. The adaptive skin impedance mid-frequency physiotherapy device control method according to claim 9, characterized in that, The user data includes gender, age, weight, body fat percentage, and skin type, which includes dry skin, oily skin, and normal skin.

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