CN114191707B - Skin impedance-based cosmetic instrument radio frequency power control method and equipment - Google Patents
Skin impedance-based cosmetic instrument radio frequency power control method and equipment Download PDFInfo
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- CN114191707B CN114191707B CN202111535351.9A CN202111535351A CN114191707B CN 114191707 B CN114191707 B CN 114191707B CN 202111535351 A CN202111535351 A CN 202111535351A CN 114191707 B CN114191707 B CN 114191707B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/08—Arrangements or circuits for monitoring, protecting, controlling or indicating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0531—Measuring skin impedance
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4836—Diagnosis combined with treatment in closed-loop systems or methods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/40—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals
- A61N1/403—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals for thermotherapy, e.g. hyperthermia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
Abstract
The application discloses a cosmetic instrument radio-frequency power control method and device based on skin impedance, wherein the current period radio-frequency power is obtained, then the current skin impedance value is determined according to the current period radio-frequency power, and finally the radio-frequency output power is adjusted according to the current skin impedance value and a preset reference impedance value. The change of data such as human skin temperature, water content, electrolyte content can arouse the change of skin impedance, and this application combines current skin impedance value and predetermines benchmark impedance value adjustment radio frequency output through the impedance that detects human skin tissue, can improve beauty instrument's safety in utilization and result of use according to the whole state adjustment radio frequency output of current skin.
Description
Technical Field
The application relates to the technical field of beauty instruments, in particular to a skin impedance-based beauty instrument radio frequency power control method and equipment.
Background
The radio frequency beauty instrument penetrates through skin and extends into subcutaneous tissues by outputting radio frequency waves, has no pain, no wound, no side effect and excellent effect, and is deeply loved by consumers. The radio frequency beauty instrument emits radio frequency electromagnetic waves to penetrate into the dermis layer of human skin, so that the dermis tissue generates a heat effect, subcutaneous collagen contraction and tension and collagen growth and regeneration are promoted, and the effects of wrinkle elimination, skin tightening and growth in the reverse age are achieved.
The existing radio frequency beauty instrument basically fixes power output, only adjusts the radio frequency output power according to a temperature sensing probe, prevents the skin of a user from being burnt due to overhigh temperature, and does not adjust the power according to other differences (such as impedance) except the skin temperature, so that the overhigh power can be used at the part with lower skin impedance, and the temperature sensing probe cannot timely detect temperature change due to overhigh power and overhigh temperature rise, thereby causing temperature control delay and easily causing skin scald; it is also possible to use too low power at the portion of skin with higher impedance, and the power is too low to allow the skin to reach the temperature for generating efficacy, which affects the use effect.
Disclosure of Invention
The application aims to overcome the defect that the use safety and the use efficacy cannot be ensured only by adjusting the radio frequency power of the beauty instrument according to the temperature in the prior art, and provides a skin impedance-based beauty instrument radio frequency power control method and equipment.
The technical scheme of the application provides a cosmetic instrument radio frequency power control method based on skin impedance, which comprises the following steps
Acquiring the radio frequency power of the current period;
determining a current skin impedance value according to the current period radio frequency power;
and adjusting the radio frequency output power according to the current skin impedance value and a preset reference impedance value.
Further, the determining the current skin impedance value according to the current period radio frequency power specifically includes
And inputting the current period radio frequency power into a power-skin impedance calibration table, and looking up the table to output a current skin impedance value corresponding to the current period radio frequency power.
Further, the adjusting the radio frequency output power according to the current skin impedance value and a preset reference impedance value specifically includes
If the current skin impedance value is within the safe impedance range, then
Determining target radio frequency output power according to the difference value of the current skin impedance value and a preset reference impedance value;
and adjusting the radio frequency output power according to the target radio frequency output power.
Further, the determining the target rf output power according to the difference between the current skin impedance value and the preset reference impedance value specifically includes
Subtracting a preset reference impedance value from the current skin impedance value to obtain an impedance difference value;
calculating the power proportion according to the impedance difference: p = a + b Δ R, where a, b are coefficients and Δ R is the impedance difference;
and multiplying the preset maximum power by the power ratio to obtain the target radio frequency output power.
Further, before the step of multiplying the preset maximum power by the power ratio to obtain the target rf output power, the method further includes
If the power ratio is greater than or equal to 1, then
Taking the preset maximum power as the target radio frequency output power, otherwise
And multiplying the preset maximum power by the power ratio to obtain the target radio frequency output power.
Further, after determining the current skin impedance value according to the current cycle radio frequency power, the method further comprises
Acquiring a historical skin impedance value and a current skin impedance value, and determining a current maximum impedance value and a current minimum impedance value;
determining the maximum variation of the current impedance according to the maximum current impedance value and the minimum current impedance value;
and if the maximum variation of the current impedance is larger than or equal to the variation threshold, closing the radio frequency output.
Further, the radio frequency current is driven by a PWM signal, and the radio frequency current is periodically and intermittently output;
the adjusting of the radio frequency output power specifically comprises
Adjusting the output period of the RF current, and/or
Adjusting the output voltage of the power supply, and/or
Adjusting the frequency of the PWM signal, and/or
And adjusting the duty ratio of the PWM signal.
Further, the radio frequency current is driven by the PWM signal, and the radio frequency current is periodically and intermittently output;
the adjusting of the radio frequency output power specifically comprises
Adjusting the radio frequency output power by adjusting the output period of the radio frequency current;
if the output period of the radio frequency current does not meet the period adjustment condition and the radio frequency output power does not reach the target radio frequency output power, adjusting the output voltage of the power supply;
if the output voltage of the power supply does not meet the voltage regulation condition and the radio frequency output power does not reach the target radio frequency output power, regulating the frequency of the PWM signal;
and if the frequency of the PWM signal does not meet the frequency adjusting condition and the radio frequency output power does not reach the target radio frequency output power, adjusting the duty ratio of the PWM signal.
The technical scheme of the present application also provides a storage medium, where the storage medium stores computer instructions, and when a computer executes the computer instructions, the storage medium is used to execute the skin impedance-based cosmetic instrument radio frequency power control method.
The technical scheme of the application also provides electronic equipment which comprises at least one processor; and (c) a second step of,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the skin impedance based cosmetic instrument radio frequency power control method as previously described.
After adopting above-mentioned technical scheme, have following beneficial effect:
the change of data such as human skin temperature, water content, electrolyte content can arouse the change of skin impedance, and this application combines current skin impedance value and predetermines benchmark impedance value adjustment radio frequency output through the impedance that detects human skin tissue, can improve beauty instrument's safety in utilization and result of use according to the whole state adjustment radio frequency output of current skin.
Drawings
The disclosure of the present application will become more readily understood with reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present application. In the figure:
fig. 1 is a flowchart of a method for controlling rf power of a skin impedance-based cosmetic apparatus according to an embodiment of the present application;
fig. 2 is a flow chart of a method for controlling rf power of a skin impedance-based cosmetic apparatus according to a preferred embodiment of the present application;
fig. 3 is a schematic diagram of a hardware structure of an electronic device in an embodiment of the present application.
Detailed Description
Embodiments of the present application are further described below with reference to the accompanying drawings.
It is easily understood that according to the technical solutions of the present application, those skilled in the art can substitute various structures and implementations without changing the spirit of the present application. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present application, and should not be construed as limiting or restricting the technical solutions of the present application in their entirety.
The directional terms upper, lower, left, right, front, rear, front, back, top, bottom and the like that are or may be mentioned in this specification are defined relative to the configurations shown in the drawings, and are relative concepts that may be changed accordingly depending on the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Throughout the description of the present application, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The foregoing is to be understood as belonging to the specific meanings in the present application as appropriate to the person of ordinary skill in the art.
The skin impedance-based cosmetic instrument radio frequency power control method in the embodiment of the application is shown in fig. 1 and comprises the following steps
Step S101: acquiring the radio frequency power of the current period;
step S102: determining a current skin impedance value according to the current period radio frequency power;
step S103: and adjusting the radio frequency output power according to the current skin impedance value and a preset reference impedance value.
And responding to a radio frequency beauty instrument starting instruction, periodically acquiring the actually output radio frequency power, and setting 0.1-0.5S as a period, wherein the step S101-the step S103 are executed in each period.
Specifically, the current-period radio frequency power acquired in step S101 is actually output radio frequency power, not output target power emitted by the system, and may be calculated by collecting actually output radio frequency current and voltage.
Then, step S102 is executed to obtain a current skin impedance value, for example, the current skin impedance value can be calculated according to the output target power sent by the system and the acquired current period radio frequency power; or calibrating a relation table of the radio frequency power and the skin impedance in advance, and quickly determining the skin impedance value in a table look-up mode.
And finally, step S103, adjusting the radio frequency output power according to the current skin impedance value and a preset reference impedance value based on a preset power adjustment rule. The preset reference impedance value is a skin impedance value of the skin under the action of radio frequency current of the beauty instrument and in a state of the best beauty effect, the preset power adjustment rule is set by taking the preset reference skin impedance value as a target, the current skin impedance value is compared with the preset reference skin impedance value, and the radio frequency output power is adjusted according to a comparison result.
In the embodiment of the application, the current skin impedance value is used as the adjustment basis of the radio frequency output power, the skin impedance value is different from the skin temperature, and the skin temperature can only detect the temperature of the epidermis layer and cannot reflect the state in the dermis layer; the change of parameters such as the water content of skin tissue, the electrolyte content, the tissue temperature and the like can influence the skin impedance value, and the skin impedance value can reflect the comprehensive state of the dermis layer and the epidermis layer of the skin in real time. Therefore, the radio frequency output power adjusting method based on the skin impedance value can adjust the radio frequency output power in time, so that the skin can reach the optimal state, and meanwhile, the risks of scalding and the like are prevented.
In one embodiment, the determining the current skin impedance value according to the current cycle radio frequency power specifically includes
And inputting the current period radio frequency power into a power-skin impedance calibration table, and looking up the table to output a current skin impedance value corresponding to the current period radio frequency power.
According to the embodiment of the application, the relation between the radio frequency power and the skin impedance is calibrated in advance and a power-skin impedance calibration table is listed according to relevant parameter data of the beauty instrument, when the current skin impedance value is determined, the radio frequency power in the current period is input into the power-skin impedance calibration table, and the corresponding current skin impedance value is obtained by looking up the table.
The power-skin impedance calibration table is formulated by combining the relevant parameter data of the beauty instrument, so that the influence of the power, voltage and current parameters of the beauty instrument on the skin impedance detection value can be eliminated, and the accuracy of the power-skin impedance calibration table is improved; meanwhile, a table look-up mode is adopted, so that a complex data processing flow is not needed, the response can be fast, and the response speed of the radio frequency power adjustment is improved.
In one embodiment, the adjusting the radio frequency output power according to the current skin impedance value and the preset reference impedance value specifically includes
If the current skin impedance value is within the safe impedance range, then
Determining target radio frequency output power according to the difference value of the current skin impedance value and a preset reference impedance value;
and adjusting the radio frequency output power according to the target radio frequency output power.
Specifically, the safe impedance range is a skin impedance range in a normal use state of the beauty instrument, and is set between a lower impedance threshold and an upper impedance threshold. When the skin impedance is smaller than a lower limit impedance threshold, which is preferably set to 50 ohms, the radio frequency output power is overlarge, and the short circuit of the electrode output end or the internal circuit fault may exist; when the skin impedance is larger than the upper limit impedance threshold, which preferably sets the upper limit impedance threshold to 2K ohms, it indicates that the radio frequency output power is too small, and there may be a case that the electrode output end is not in contact with the skin.
In order to avoid other risks such as scald caused by overlarge radio frequency output power, electric energy waste caused by continuous power output of the beauty instrument in a non-use state and the like, when the skin impedance value is out of the safe impedance range, the radio frequency output is automatically closed, and the safety protection is realized.
And after the current skin impedance value is determined to be within the safe impedance range, determining target radio frequency output power according to the difference value of the skin impedance value and a preset reference impedance value based on a preset calculation rule, and adjusting the radio frequency output power to the target radio frequency output power.
Before the target radio frequency output power is determined, whether the current skin impedance value is within the safe impedance range or not is judged, and safety is guaranteed.
In one embodiment, the determining the target rf output power according to the difference between the current skin impedance value and the preset reference impedance value specifically includes
Subtracting a preset reference impedance value from the current skin impedance value to obtain an impedance difference value;
calculating the power ratio according to the impedance difference: p = a + b Δ R, where a, b are coefficients and Δ R is the impedance difference;
and multiplying the preset maximum power by the power ratio to obtain the target radio frequency output power.
If the current skin impedance value is larger than the preset reference impedance value, the impedance difference value delta R is a positive value, and if the current skin impedance value is smaller than the preset reference impedance value, the impedance difference value delta R is a negative value. Wherein, a is a compensation coefficient, which acts as a minimum value of the limiting power, and a compensation calculation value, and the value of the compensation coefficient a can be selected as 20; b is a scaling factor, which may be selected to be 0.4. And the calculated power proportion P is the percentage of the preset maximum power, and the preset maximum power is multiplied by the power proportion to finally obtain the target radio frequency output power.
According to the embodiment of the application, the target radio frequency output power is obtained through calculation according to the impedance difference value and the preset maximum power, and the better radio frequency output power can be obtained within the limited radio frequency output power range based on the impedance difference value.
In one embodiment, before the step of multiplying the preset maximum power by the power ratio to obtain the target rf output power, the method further includes
If the power ratio is greater than or equal to 1, then
Taking the preset maximum power as the target radio frequency output power, otherwise
And multiplying the preset maximum power by the power ratio to obtain the target radio frequency output power.
The preset maximum power is based on safety factor consideration, the allowed maximum power of the radio frequency output is the allowed maximum power, and if the radio frequency output power exceeds the preset maximum power, risks such as overlarge radio frequency current and scalding exist.
According to the embodiment of the application, before the target radio frequency output power is determined, whether the calculated target radio frequency output power is larger than or equal to the preset maximum power is judged, so that power protection is realized.
Specifically, whether the power ratio calculated based on the impedance difference is greater than or equal to 1 is judged, if the power ratio is greater than or equal to 1, the finally calculated target radio frequency output power is inevitably greater than or equal to the preset maximum power, and at the moment, the preset maximum power is used as the target radio frequency output power, so that the radio frequency output power is prevented from exceeding the preset maximum power.
In one embodiment, after determining the current skin impedance value according to the current cycle radio frequency power, the method further includes
Acquiring a historical skin impedance value and a current skin impedance value, and determining a current maximum impedance value and a current minimum impedance value;
determining the maximum variation of the current impedance according to the current maximum impedance value and the current minimum impedance value;
and if the maximum variation of the current impedance is larger than or equal to the variation threshold, closing the radio frequency output.
Specifically, after a starting instruction is received, the skin impedance value acquired in each period is stored as a historical skin impedance value, after the current skin impedance value is determined according to the radio frequency power in each period, the current maximum impedance value and the current minimum impedance value are obtained from the current skin impedance value and the historical skin impedance value, the current maximum impedance value is subtracted from the current minimum impedance value to obtain the current maximum impedance variation, and the current maximum impedance variation is the maximum impedance variation after the cosmetic instrument is started at this time.
Because the moisture content, the electrolyte content and the like of the skin tissue can affect the impedance value of the skin, the moisture content, the electrolyte content and other data of the skin tissue are kept stable in a short time, and the variation of the skin impedance is smaller than the variation threshold under the condition of only adjusting the skin impedance by adjusting the radio frequency output power. If the maximum variation of the current impedance is detected to be larger than or equal to the variation threshold, the data such as the water content, the electrolyte content and the like of the skin tissue are considered to be changed, and the risk of scalding caused by accelerated skin temperature rise possibly exists by continuously adjusting the radio frequency output power at the moment, so that the radio frequency output is directly closed and the cosmetic instrument is restarted at the moment to ensure the use safety. The stored historical skin impedance value is stored in the next stage after the radio frequency output is closed every time and the data is cleared.
According to the embodiment of the application, after the current skin impedance is obtained and before the target radio frequency output power is determined, the maximum variation of the impedance after starting is judged firstly to judge whether the skin state is stable or not, if the maximum variation of the impedance is overlarge, the skin state is considered to be mutated, and in order to avoid temperature sudden rise caused by skin state variation, the radio frequency output is directly closed to ensure the use safety.
In one embodiment, the radio frequency current is driven by a PWM signal, and the radio frequency current is periodically and intermittently output;
the adjusting of the radio frequency output power specifically comprises
Adjusting the output period of the RF current, and/or
Adjusting the output voltage of the power supply, and/or
Adjusting the frequency of the PWM signal, and/or
And adjusting the duty ratio of the PWM signal.
Specifically, the radio frequency output current of the beauty instrument is driven by the PWM signal, and the PWM signal is periodically and intermittently output, so that the radio frequency current is driven to be periodically and intermittently output, namely, the radio frequency current is output for a first time period, the output for a second time period is stopped, and then the first time period is output, and the radio frequency current is sequentially and cyclically output.
In the embodiment of the present application, the radio frequency output power may be adjusted by using at least one of the following four ways:
firstly, the output period of the radio frequency current is adjusted, the duration of a first time period of the radio frequency current output can be adjusted, the duration of a second time period of the radio frequency current output stopping can also be adjusted, or the durations of the first time period and the second time period are adjusted simultaneously;
setting a DC-DC power supply of radio frequency current as an adjustable power supply, and adjusting the radio frequency output power by adjusting the output voltage of the power supply;
thirdly, adjusting the radio frequency output power by adjusting the frequency of a driving PWM signal of the radio frequency current;
and fourthly, adjusting the radio frequency output power by adjusting the duty ratio of a driving PWM signal of the radio frequency current.
The embodiment of the application provides four adjustment modes of the radio frequency output power, one or more than two of the adjustment modes can be selected to realize the adjustment of the radio frequency output power, the adjustable range of the radio frequency output power is enlarged, and the effective execution of a radio frequency output power adjustment strategy based on skin impedance is ensured.
In one embodiment, the radio frequency current is driven by a PWM signal, and the radio frequency current is periodically and intermittently output;
the adjusting the radio frequency output power specifically comprises
Adjusting the radio frequency output power by adjusting the output period of the radio frequency current;
if the output period of the radio frequency current does not meet the period adjustment condition and the radio frequency output power does not reach the target radio frequency output power, adjusting the output voltage of the power supply;
if the output voltage of the power supply does not meet the voltage regulation condition and the radio frequency output power does not reach the target radio frequency output power, regulating the frequency of the PWM signal;
and if the frequency of the PWM signal does not meet the frequency adjusting condition and the radio frequency output power does not reach the target radio frequency output power, adjusting the duty ratio of the PWM signal.
The embodiment of the application sets the selection priority for the adjustment ranges of the four radio frequency output powers, and the selection priority is sequentially the adjustment of the output period of the radio frequency current, the adjustment of the output voltage of the power supply, the adjustment of the frequency of the PWM signal and the adjustment of the duty ratio of the PWM signal.
Specifically, the output period of the rf current is preferably adjusted to achieve the adjustment of the rf output power, and if the output period of the rf current is adjusted to a value that does not satisfy the adjustment condition (e.g., the output period of the rf current is adjusted to a limit value of the period adjustable range), and the rf output power does not reach the target rf output power, the rf output power is adjusted to the target rf output power
The output voltage of the power supply is selected to adjust the RF output power, and if the output voltage of the power supply does not satisfy the voltage adjustment condition (for example, the output voltage of the power supply is adjusted to the limit value of the voltage adjustable range) and the RF output power does not reach the target RF output power, the RF output power is adjusted according to the output voltage of the power supply
Adjusting the frequency of the PWM signal is selected to adjust the rf output power, and if the frequency of the PWM signal does not satisfy the frequency adjustment condition (for example, the frequency of the PWM signal is adjusted to a limit value of the frequency adjustable range), and the rf output power does not reach the target rf output power, the rf output power is adjusted to the target rf output power
And adjusting the duty ratio of the PWM signal to realize the adjustment of the radio frequency output power.
When the target rf output power is within the normal range, the rf output power can be adjusted to the target rf output power by the four methods.
The embodiment of the application provides a specific adjustment mode of the radio frequency output power, and the specific adjustment mode is selected in sequence according to the priority sequence of the four adjustment modes, so that the conflict among the multiple adjustment modes is avoided.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
FIG. 2 is a flow chart of the RF power control method of the skin impedance-based beauty treatment instrument in a preferred embodiment of the present application, including
Step S201: acquiring the radio frequency power of the current period;
step S202: inputting the current period radio frequency power into a power-skin impedance calibration table, and looking up the table to output a current skin impedance value corresponding to the current period radio frequency power;
step S203: if the current skin impedance value is within the safe impedance range, executing step S204, otherwise executing step S219;
step S204: acquiring a historical skin impedance value and a current skin impedance value, and determining a current maximum impedance value and a current minimum impedance value;
step S205: determining the maximum variation of the current impedance according to the current maximum impedance value and the current minimum impedance value;
step S206: if the maximum variation of the current impedance is greater than or equal to the variation threshold, performing step S219, otherwise, performing step S207;
step S207: subtracting a preset reference impedance value from the current skin impedance value to obtain an impedance difference value;
step S208: calculating the power proportion according to the impedance difference: p = a + b Δ R, where a, b are coefficients and Δ R is the impedance difference;
step S209: if the power ratio is greater than or equal to 1, executing step S210, otherwise executing step S211;
step S210: taking the preset maximum power as a target radio frequency output power, and then executing step S212;
step S211: multiplying the preset maximum power by the power ratio to obtain target radio frequency output power, and then executing the step S212;
step S212: adjusting the output period of the radio frequency current according to the target radio frequency output power;
step S213: if the output period of the rf current does not satisfy the period adjustment condition and the rf output power does not reach the target rf output power, go to step S214;
step S214: adjusting the output voltage of the power supply according to the target radio frequency output power;
step S215: if the output voltage of the power supply does not satisfy the voltage adjustment condition and the rf output power does not reach the target rf output power, go to step S216;
step S216: adjusting the frequency of the PWM signal according to the target radio frequency output power;
step S217: if the frequency of the PWM signal does not satisfy the frequency adjustment condition and the rf output power does not reach the target rf output power, go to step S218;
step S218: adjusting the duty ratio of the PWM signal according to the target radio frequency output power;
step S219: the radio frequency output is turned off.
The technical solution of the present application further provides a storage medium, where the storage medium stores computer instructions, and when the computer executes the computer instructions, the storage medium is configured to execute the method for controlling radio frequency power of a skin impedance-based cosmetic apparatus in any one of the foregoing embodiments.
Fig. 3 shows an electronic device of the present application, comprising:
at least one processor 301; and (c) a second step of,
a memory 302 communicatively coupled to the at least one processor 301; wherein the content of the first and second substances,
the memory 302 stores instructions executable by the at least one processor 301 to enable the at least one processor 301 to perform all the steps of the skin impedance based cosmetic instrument radio frequency power control method in any of the method embodiments described above.
In fig. 3, a processor 302 is taken as an example:
the electronic device may further include: an input device 303 and an output device 304.
The processor 301, memory 302, input device 303, and output device 304 may be connected by a bus or other means.
The memory 302 is a non-volatile computer-readable storage medium, and can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the skin impedance-based cosmetic apparatus rf power control method in the embodiment of the present application, for example, the method flow shown in fig. 1 or 2. The processor 301 executes the non-volatile software programs, instructions and modules stored in the memory 302 to execute various functional applications and data processing, i.e. to implement the skin impedance-based cosmetic instrument radio frequency power control method in the above embodiment.
The memory 302 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the skin impedance-based cosmetic instrument radio frequency power control method, and the like. Further, the memory 302 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 302 optionally includes memory remotely located from processor 301, which may be connected via a network to a device that performs the skin impedance based cosmetic instrument radio frequency power control method. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 303 may receive an input of a user click and generate signal inputs related to user settings and function control of the skin impedance based cosmetic instrument radio frequency power control method. The output device 404 can output signals such as current and data, for example, rf current signals output by the skin impedance-based cosmetic instrument rf power control method, and the output device 304 can also be connected to a display device including an indicator light and a display screen.
When the one or more modules are stored in the memory 302, when executed by the one or more processors 301, the skin impedance based cosmetic instrument radio frequency power control method of any of the method embodiments described above is performed.
What has been described above is merely the principles and preferred embodiments of the present application. It should be noted that, for those skilled in the art, the embodiments obtained by appropriately combining the technical solutions respectively disclosed in the different embodiments are also included in the technical scope of the present invention, and several other modifications may be made on the basis of the principle of the present application and should also be regarded as the protective scope of the present application.
Claims (8)
1. A cosmetic instrument radio frequency power control method based on skin impedance is characterized by comprising
Acquiring the radio frequency power of the current period;
determining a current skin impedance value according to the current period radio frequency power;
adjusting radio frequency output power according to the current skin impedance value and a preset reference impedance value;
adjusting the radio frequency output power according to the current skin impedance value and a preset reference impedance value specifically comprises
If the current skin impedance value is within the safe impedance range, then
Determining target radio frequency output power according to the difference value between the current skin impedance value and a preset reference impedance value;
adjusting the radio frequency output power according to the target radio frequency output power;
the determining the target radio frequency output power according to the difference value between the current skin impedance value and the preset reference impedance value specifically comprises
Subtracting a preset reference impedance value from the current skin impedance value to obtain an impedance difference value;
calculating the power proportion according to the impedance difference: p = a + b Δ R, where a, b are coefficients and Δ R is the impedance difference;
and multiplying the preset maximum power by the power ratio to obtain the target radio frequency output power.
2. The method of claim 1, wherein determining a current skin impedance value based on the current periodic RF power comprises
And inputting the current period radio frequency power into a power-skin impedance calibration table, and looking up the table to output a current skin impedance value corresponding to the current period radio frequency power.
3. The skin impedance-based cosmetic instrument radio-frequency power control method of claim 1, wherein before multiplying the preset maximum power by the power ratio to obtain the target radio-frequency output power, further comprising
If the power ratio is greater than or equal to 1, then
Taking the preset maximum power as the target radio frequency output power, otherwise
And multiplying the preset maximum power by the power ratio to obtain the target radio frequency output power.
4. The skin impedance-based cosmetic instrument radio frequency power control method of any one of claims 1-3, further comprising determining a current skin impedance value according to the current cycle radio frequency power, and then
Acquiring a historical skin impedance value and a current skin impedance value, and determining a current maximum impedance value and a current minimum impedance value;
determining the maximum variation of the current impedance according to the current maximum impedance value and the current minimum impedance value;
and if the maximum variation of the current impedance is larger than or equal to the variation threshold, closing the radio frequency output.
5. The skin impedance-based cosmetic instrument radio frequency power control method according to any one of claims 1 to 3, wherein the radio frequency current is driven by a PWM signal and the radio frequency current is periodically and intermittently outputted;
the adjusting the radio frequency output power specifically comprises
Adjusting the output period of the RF current, and/or
Adjusting the output voltage of the power supply, and/or
Adjusting the frequency of the PWM signal, and/or
And adjusting the duty ratio of the PWM signal.
6. The skin impedance-based beauty instrument radio frequency power control method according to any one of claims 1-3, wherein the radio frequency current is driven by a PWM signal and the radio frequency current is periodically and intermittently outputted;
the adjusting of the radio frequency output power specifically comprises
Adjusting the radio frequency output power by adjusting the output period of the radio frequency current;
if the output period of the radio frequency current does not meet the period adjustment condition and the radio frequency output power does not reach the target radio frequency output power, adjusting the output voltage of the power supply;
if the output voltage of the power supply does not meet the voltage regulation condition and the radio frequency output power does not reach the target radio frequency output power, regulating the frequency of the PWM signal;
and if the frequency of the PWM signal does not meet the frequency adjusting condition and the radio frequency output power does not reach the target radio frequency output power, adjusting the duty ratio of the PWM signal.
7. A storage medium storing computer instructions for performing the skin impedance based cosmetic instrument radio frequency power control method of any one of claims 1-6 when executed by a computer.
8. An electronic device comprising at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the skin impedance based cosmetic instrument radio frequency power control method of any one of claims 1-6.
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| CN117482390A (en) * | 2024-01-02 | 2024-02-02 | 深圳市宗匠科技有限公司 | Output power adjusting method, beauty instrument, storage medium and electronic equipment |
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