Moisture detection circuit, moisture detection method and beauty instrument

Abstract

The invention provides a moisture detection circuit, a moisture detection method and a cosmetic instrument, the moisture detection circuit comprises a first detection electrode tip, a second detection electrode tip, an input unit and an output unit, and the first detection electrode tip and the second detection electrode tip are not in contact with each other; the input unit is connected with the first detection electrode tip and receives a detection driving signal and a detection enable signal, and the input unit is excited to transmit the received detection driving signal to the first detection electrode tip when the detection enable signal is configured to represent that the beauty instrument is in a moisture detection stage; the output unit is connected with the second detection electrode tip and responds to the excitation state of the input unit, the second detection electrode tip generates a corresponding detection signal based on the detection driving signal on the first detection electrode tip and the permeable medium between the first detection electrode tip and the second detection electrode tip, and the detection signal is output after being processed by the output unit, and a detection output signal output by the output unit represents the moisture content of the permeable medium.

Description

Technical Field

[0001] This application relates to the field of medical beauty technology, and in particular, to a moisture detection circuit, a moisture detection method, and a beauty instrument. Background Art

[0002] When dealing with the problems of "early aging" of the skin, such as dryness and water shortage, loss of collagen, and slow metabolism, current beauty electronic devices such as beauty instruments apply radio frequency technology and microcurrent technology to promote collagen synthesis, accelerate skin metabolism, and promote the penetration of skin care products, helping the skin to moisturize and lock water, and improving the problem of rough skin.

[0003] However, most current beauty instruments on the market cannot collect the moisture content of the penetration medium during penetration, and cannot determine whether the medium is dry. If the medium dries up early during the penetration process, the conductivity of the medium will be greatly reduced, the current formed by the penetration electric field will be very small, and the penetration effect will be greatly reduced, thus affecting the penetration effect. Summary of the Invention

[0004] This application provides a moisture detection circuit, a moisture detection method, and a beauty instrument, which can solve the problem that existing beauty instruments cannot detect the moisture content of the penetration medium.

[0005] To solve the above problems, a technical solution provided by this application is: to provide a moisture detection circuit, which is applied to a beauty instrument and includes: a first detection electrode head and a second detection electrode head, configured to contact the user's skin, and the first detection electrode head and the second detection electrode head are non-contact with each other; an input unit, connected to the first detection electrode head, and receiving a detection drive signal and a detection enable signal. When the detection enable signal is configured to indicate that the beauty instrument is in the moisture detection stage, the input unit is excited to transmit the received detection drive signal to the first detection electrode head; an output unit, connected to the second detection electrode head. In response to the input unit being in an excited state, based on the detection drive signal on the first detection electrode head and the penetration medium between the first detection electrode head and the second detection electrode head, the second detection electrode head generates a corresponding detection signal and outputs it after being processed by the output unit, where the detection output signal output by the output unit represents the moisture content of the penetration medium.

[0006] In an embodiment, the input unit includes a switching device, and the switching device includes an optocoupler or a relay; wherein, when the switching device is configured to be in a conducting state by the detection enable signal, the input unit is excited to transmit the received detection drive signal to the first detection electrode head.

[0007] In one embodiment, the switching device includes an optocoupler, and the optocoupler includes: a control terminal for receiving the detection enable signal; a first path terminal for receiving the detection drive signal; a second path terminal connected to the first detection electrode head; in response to the control terminal being configured to be in a conducting state by the detection enable signal, the optocoupler conducts, and the detection drive signal is transmitted to the first detection electrode head through the optocoupler.

[0008] In one embodiment, the output unit includes: a signal amplification unit connected to the second detection electrode head for amplifying and outputting the detection signal generated by the second detection electrode head; a protection unit connected to the signal amplification unit for protecting the signal amplification unit.

[0009] In one embodiment, the signal amplification unit includes: a signal amplifier including a first input terminal, a second input terminal, and an output terminal, the first input terminal of the signal amplifier being connected to the second detection electrode head; a first resistor and a second resistor, the first ends of the first resistor and the second resistor being connected to the second input terminal of the signal amplifier, the second end of the first resistor being connected to the output terminal of the signal amplifier, and the second end of the second resistor being grounded.

[0010] In one embodiment, the protection unit includes a diode, the cathode of the diode being connected to the first input terminal of the signal amplifier, and the anode of the diode being grounded.

[0011] In one embodiment, the output unit further includes: a first filtering unit connected between the second detection electrode head and the signal amplification unit for filtering the detection signal; a second filtering unit connected between the output terminal of the signal amplification unit and the signal output terminal for filtering the detection output signal output by the signal amplification unit.

[0012] To solve the above problems, another technical solution provided by the present application is: to provide a moisture detection method applied to a beauty instrument, including: in response to the beauty instrument being in the moisture detection stage, configuring a detection enable signal to make the input unit of the moisture detection circuit in an excited state, and transmitting a detection drive signal to the first detection electrode head; in response to the input unit being in an excited state, based on the detection drive signal on the first detection electrode head and the permeation medium between the first detection electrode head and the second detection electrode head, generating a corresponding detection signal on the second detection electrode head; processing and outputting the detection signal through the output unit of the moisture detection circuit, wherein the detection output signal output by the output unit characterizes the moisture content of the permeation medium.

[0013] In one embodiment, it further includes: performing corresponding operations in response to the moisture content of the permeating medium characterized by the detected output signal being lower than a preset value.

[0014] To solve the above problems, another technical solution provided by this application is: to provide a beauty instrument, including: a moisture detection circuit, the moisture detection circuit as described in any one of the above; at least one set of penetration promoting electrode groups for outputting a penetration promoting electric field. Among them, the penetration promoting electric field can be used to promote the penetration and absorption of the permeating medium on the user's skin or achieve a beauty effect.

[0015] In one embodiment, the penetration promoting electrodes in the penetration promoting electrode group, the first detection electrode head and the second detection electrode head in the moisture detection circuit are arranged in the same plane.

[0016] In one embodiment, the working time period of the moisture detection stage does not overlap with the working time period of the penetration promoting stage of the beauty instrument; in the penetration promoting stage, at least one set of the penetration promoting electrode groups in the beauty instrument is configured to output a penetration promoting electric field.

[0017] Different from the prior art, the beneficial effect of this application is that in the moisture detection circuit, moisture detection method, and beauty instrument provided by this application, the moisture detection circuit includes a first detection electrode head, a second detection electrode head, an input unit, and an output unit. Among them, when the input unit is configured to represent that the beauty instrument is in the moisture detection stage in response to the detection enable signal, the input unit is excited to transmit the received detection drive signal to the first detection electrode head; the output unit, in response to the input unit being in an excited state, based on the detection drive signal on the first detection electrode head and the permeating medium between the first detection electrode head and the second detection electrode head, the second detection electrode head generates a corresponding detection signal and outputs a detection output signal representing the moisture content of the permeating medium after being processed by the output unit, so as to control the beauty instrument to perform corresponding operations, such as alarming to prompt the user, reducing power output, etc., to improve the user experience. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the beauty instrument provided by this application;

[0020] Figure 2 It is a schematic structural diagram of the beauty instrument provided by this application from a perspective;

[0021] Figure 3 Schematic diagram of a structure of a moisture detection circuit provided by the present application;

[0022] Figure 4 Schematic diagram of a structure of another embodiment of the moisture detection circuit provided by the present application;

[0023] Figure 5 Circuit diagram of an embodiment of the moisture detection circuit provided by the present application;

[0024] Figure 6 Schematic flowchart of an embodiment of the moisture detection method provided by the present application;

[0025] Figure 7 Schematic flowchart of another embodiment of the moisture detection method provided by the present application. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] The terms "first" and "second" in the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0028] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0029] Next, the present application will be described in detail in conjunction with the accompanying drawings and embodiments.

[0030] See Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of an embodiment of the beauty instrument provided by the present application; Figure 2 which is a schematic structural diagram of the beauty instrument provided by the present application from a perspective.

[0031] The present application provides a beauty instrument 1000, which includes a moisture detection circuit 100, at least one set of penetration enhancement electrode groups 200, and a control chip 300.

[0032] Among them, the moisture detection circuit 100 and at least one set of penetration enhancement electrode groups 200 are respectively electrically connected to the control chip 300. The moisture detection circuit 100 is used to detect the moisture content of the penetration medium; at least one set of penetration enhancement electrode groups 200 is used to output a penetration enhancement electric field. Among them, according to different frequencies and magnitudes, the penetration enhancement electric field can be used to promote the penetration and absorption of the penetration medium on the user's skin or achieve beauty effects. Specifically, such as achieving radio frequency beauty, EMS (Electrical Muscle Stimulation) microcurrent beauty, iontophoresis, electroporation, etc. Among them, the penetration enhancement electrode group includes at least 2 electrodes, and an electric field for penetration enhancement or beauty can be formed between the 2 electrodes.

[0033] In a usage scenario, during the process of the user using the beauty instrument 1000, the moisture detection circuit 100 detects the moisture content of the penetration medium on the user's skin. When the control chip 300 determines that the moisture content of the penetration medium detected by the moisture detection circuit 100 is lower than the threshold, corresponding operations are performed, such as issuing an alarm, or reducing the power output of the control chip 300 to the penetration enhancement electrode group 200, etc., so as to avoid the moisture content in the penetration medium being too low and greatly reducing the penetration enhancement effect, and further avoid affecting the penetration enhancement effect.

[0034] In an embodiment, as Figure 2 shown, at least one set of penetration enhancement electrode groups 200 includes two sets of penetration enhancement electrode groups 200. The first set of penetration enhancement electrode groups 200 includes penetration enhancement electrodes A and B, and the second set of penetration enhancement electrode groups 200 includes penetration enhancement electrodes C and D. Of course, in some control modes, at least any 2 electrodes among A, B, C, and D can form a set of electrode groups to achieve beauty and penetration enhancement effects. The moisture detection circuit 100 includes a first detection electrode head P1 and a second detection electrode head P2. Among them, the penetration enhancement electrodes (A, B, C, D) in the penetration enhancement electrode group 200 and the first detection electrode head P1 and the second detection electrode head P2 are arranged on the same plane, so that they can be arranged on the user's skin on the same plane, so as to achieve the functions of simultaneously enhancing penetration and detecting moisture of the penetration medium coated on the user's skin by the beauty instrument 1000, simplify the user operation, and improve the convenience of user use.

[0035] Among them, the shape and structure of the iontophoresis electrode, the first detection electrode head P1, and the second detection electrode head P2 in the iontophoresis electrode group 200 can be designed according to actual needs, not limited to Figure 2 the shape shown, for example, it can also be a custom structure such as an oval, rectangle, rhombus, circle, trapezoid, etc., and there is no limitation here. At the same time, the electrode can generally be made of a metal material with good electrical conductivity.

[0036] Among them, the layout design of the iontophoresis electrode, the first detection electrode head P1, and the second detection electrode head P2 in the iontophoresis electrode group 200 can be designed according to actual needs, as long as it can play the role of iontophoresis and moisture detection, not limited to Figure 2 the layout design shown.

[0037] It should be noted that since the permeation medium can generally conduct electricity, otherwise the iontophoresis pulse cannot conduct the medium to the deep layer of the skin. Therefore, if the iontophoresis electrode and the moisture detection electrode are arranged on the same plane, the iontophoresis signal will form a loop through the moisture detection electrode heads (P1, P2), which will not only interfere with the moisture detection signal, but also damage the electric field formed by the iontophoresis electrode, resulting in a tingling sensation during the iontophoresis process.

[0038] To solve this problem, in the embodiments of the present application, the working time period of the moisture detection stage is set not to overlap with the working time period of the iontophoresis stage of the beauty device 1000. Among them, during the iontophoresis stage, at least one iontophoresis electrode group 200 in the beauty device 1000 is configured to output an iontophoresis electric field. That is, the iontophoresis stage is the working state in which the iontophoresis electrode group 200 is configured to output an iontophoresis electric field.

[0039] Specifically, setting the working time period of the moisture detection stage not to overlap with the working time period of the iontophoresis stage of the beauty device 1000 avoids the iontophoresis signal in the iontophoresis stage from forming a loop through the moisture detection electrode, interfering with the moisture detection signal, and can also avoid the relevant signals of moisture detection during the iontophoresis stage from damaging the electric field formed by the iontophoresis electrode, resulting in a tingling sensation during the iontophoresis process. Therefore, in the present application, setting the working time period of the moisture detection stage not to overlap with the working time period of the iontophoresis stage of the beauty device 1000 can set the first detection electrode head P1 and the second detection electrode head P2 in the moisture detection circuit 100 on the same plane as the iontophoresis electrode group 200. Since their working time periods do not overlap, the above problems will not occur, and the beauty device 1000 can detect the moisture content of the permeation medium during the iontophoresis gap, and then perform corresponding operations, such as issuing an alarm when the detected moisture content of the permeation medium is low, or reducing the power output, thereby improving the user experience.

[0040] In addition, by setting the moisture detection stage during the gaps of multiple iontophoresis stages, as long as the time of the moisture detection stage is set short enough, the human body will not perceive the discontinuity of the iontophoresis stage, thus not affecting the user experience.

[0041] See Figure 3 , Figure 3 which is a schematic structural diagram of an embodiment of the moisture detection circuit provided by the present application.

[0042] Specifically, the present application further provides a moisture detection circuit 100, including: a first detection electrode head P1, a second detection electrode head P2, an input unit 10, and an output unit 20.

[0043] Among them, the first detection electrode head P1 and the second detection electrode head P2 are configured to contact the user's skin, and the first detection electrode head P1 and the second detection electrode head P2 are non-contact with each other. Specifically, one of the first detection electrode head P1 and the second detection electrode head P2 is used to output the received detection drive signal M1 to the permeation medium, and the other is used to receive the detection drive signal M1 transmitted through the permeation medium, so as to be transmitted to the output unit 20 to enable the output unit 20 to detect the moisture content of the permeation medium based on the detection drive signal M1.

[0044] Among them, the permeation medium can be beauty products such as essence, essence milk, beauty lotion, and medicinal liquid with beauty effects, and the permeation medium has conductivity.

[0045] The input unit 10 is connected to the first detection electrode head P1 and receives the detection drive signal M1 and the detection enable signal EN. Among them, the detection drive signal M1 and the detection enable signal EN can be sent by the control chip. Specifically, when the input unit 10 is configured to represent that the beauty instrument 1000 is in the moisture detection stage in response to the detection enable signal EN, the input unit 10 is excited, and the received detection drive signal M1 is transmitted to the first detection electrode head P1, and then the detection drive signal M1 is output to the permeation medium through the first detection electrode head P1.

[0046] The output unit 20 is connected to the second detection electrode head P2. In response to the input unit 10 being in an excited state, based on the detection drive signal M1 on the first detection electrode head P1 and the permeation medium between the first detection electrode head P1 and the second detection electrode head P2, the second detection electrode head P2 generates a corresponding detection signal M2 and outputs it after being processed by the output unit 20. Among them, the detection output signal M3 output by the output unit 20 represents the moisture content of the permeation medium.

[0047] It can be understood that since the detection drive signal M1 is transmitted to the second detection electrode head P2 through the permeation medium, and the moisture content of the permeation medium continuously decreases as the iontophoresis process progresses, the second detection electrode head P2 generates a corresponding detection signal M2 based on the detection drive signal M1 and the moisture content of the permeation medium, and then outputs it to the output unit 20 for processing and outputs the detection output signal M3 representing the moisture content of the permeation medium.

[0048] Specifically, for the moisture detection circuit 100 provided in this application, based on the detection drive signal M1 on the first detection electrode head P1 and the permeation medium between the first detection electrode head P1 and the second detection electrode head P2, the second detection electrode head P2 generates a corresponding detection signal M2, and after being processed by the output unit 20, outputs a detection output signal M3 representing the moisture content of the permeation medium. When the moisture content of the permeation medium represented by the detection output signal M3 is lower than a preset value, the beauty device 1000 performs corresponding operations, such as alarming to prompt the user, reducing power output, etc., to improve the user experience.

[0049] Among them, when the beauty device 1000 is working, it includes a penetration enhancement stage and a moisture detection stage. In the penetration enhancement stage, the penetration enhancement electrode group 200 generates a penetration enhancement electric field at a preset frequency. The penetration enhancement electric field can promote the permeation of the permeation medium into the user's skin, thereby achieving a beauty effect; the moisture detection stage is used to detect the moisture content of the permeation medium. To avoid the penetration enhancement signal in the penetration enhancement stage forming a loop through the moisture detection electrode and interfering with the moisture detection signal, and to avoid the relevant signals in the moisture detection during the penetration enhancement stage from damaging the electric field formed by the penetration enhancement electrode, resulting in a tingling sensation during the penetration enhancement process. In the embodiment of this application, the working time periods of the moisture detection stage and the penetration enhancement stage are set not to overlap. It can be located in the gap between multiple penetration enhancement stages, or in the non-power output time period of the penetration enhancement stage, so as to detect the moisture content of the permeation medium.

[0050] Specifically, for the moisture detection circuit 100 provided in this application, the input unit 10 is set to be excited only in the moisture detection stage, which avoids the penetration enhancement signal in the penetration enhancement stage forming a loop through the moisture detection electrode and interfering with the moisture detection signal M2, and can also avoid the detection drive signal M1 in the penetration enhancement stage from damaging the electric field formed by the penetration enhancement electrode, resulting in a tingling sensation during the penetration enhancement process. Therefore, in this application, the first detection electrode head P1 and the second detection electrode head P2 in the moisture detection circuit 100 can be arranged in the same plane as the penetration enhancement electrode group. Since their working time periods do not overlap, the above problems will not occur, and the beauty device 1000 can detect the moisture content of the permeation medium during the penetration enhancement gap, and then perform corresponding operations, such as alarming when detecting that the moisture content of the permeation medium is low, or reducing power output, thereby improving the user experience.

[0051] See Figure 4 , Figure 4 FIG. is a schematic structural diagram of another embodiment of the moisture detection circuit provided in this application. In one embodiment, the input unit 10 includes a switching device U. Among them, the switching device U includes an optocoupler or a relay; specifically, when the switching device U is configured to be in a conducting state by the detection enable signal EN, the input unit 10 is excited to transmit the received detection drive signal M1 to the first detection electrode head P1.

[0052] Specifically, the switch device U is used to conduct during the moisture detection stage, so as to transmit the detection drive signal M1 to the first detection electrode head P1. Additionally, the switch device U is only conductive during the moisture detection stage, which can prevent the detection drive signal M1 from damaging the electric field formed by the iontophoresis electrode during the iontophoresis stage, causing a problem of tingling sensation during the iontophoresis process, and can also prevent the current during the iontophoresis stage from damaging the control chip through the input unit 10.

[0053] In one embodiment, the switch device U includes an optocoupler. Specifically, the optocoupler has the characteristics of small volume, long service life, wide operating temperature range, and strong anti-interference performance, and has a good isolation effect on input and output electrical signals. Therefore, it is particularly suitable for application in the moisture detection circuit 100. Among them, the optocoupler includes a control terminal, a first path terminal, and a second path terminal. Among them, the control terminal is used to receive the detection enable signal EN; the first path terminal is used to receive the detection drive signal M1; the second path terminal is connected to the first detection electrode head P1. In response to the control terminal being configured to be in a conductive state by the detection enable signal EN, the optocoupler conducts, and the detection drive signal M1 is transmitted to the first detection electrode head P1 through the optocoupler.

[0054] Please continue to refer to Figure 4 , in one embodiment, the output unit 20 includes a signal amplification unit 21 and a protection unit 22. Among them, the signal amplification unit 21 is connected to the second detection electrode head P2 and is used to amplify and output the detection signal M2 generated by the second detection electrode head P2; the protection unit 22 is connected to the signal amplification unit 21 and is used to protect the signal amplification unit 21.

[0055] Refer to Figure 5 , Figure 5 is a circuit diagram of an embodiment of the moisture detection circuit provided by the present application. In the present application, the signal amplification unit 21 includes a signal amplifier A, a first resistor R1, and a second resistor R2. Among them, the signal amplifier A includes a first input terminal, a second input terminal, and an output terminal. The first input terminal of the signal amplifier A is connected to the second detection electrode head P2 and is used to receive the detection signal M2 generated on the second detection electrode head P2; the first resistor R1 serves as a negative feedback resistor. The first end of the first resistor R1 and the first end of the second resistor R2 are connected to the second input terminal of the signal amplifier A, the second end of the first resistor R1 is connected to the output terminal of the signal amplifier A, and the second end of the second resistor R2 is grounded.

[0056] The protection unit 22 includes a diode D. The cathode of the diode D is connected to the first input terminal of the signal amplifier A, and the anode of the diode D is grounded. Specifically, the diode D can protect the negative voltage value of the first input terminal of the signal amplifier A from exceeding the voltage drop of the diode D, thereby preventing the signal amplifier A from being damaged.

[0057] Please continue to refer toFigure 4 and Figure 5 In one embodiment, the output unit 20 further includes a first filtering unit 23 and a second filtering unit 24. Among them, the first filtering unit 23 serves as a high-pass filter and is connected between the second detection electrode head P2 and the signal amplification unit 21 for filtering the detection signal M2; the second filtering unit 24 serves as a low-pass filter and is connected between the output end of the signal amplification unit 21 and the signal output end P3 for filtering the detection output signal M3 output by the signal amplification unit 21.

[0058] In this embodiment, the first filtering unit 23 includes a first capacitor C1 and a third resistor R3. The first capacitor C1 serves as a DC-blocking capacitor. The first end of the first capacitor C1 is connected to the second detection electrode head P2, and the second end of the first capacitor C1 and the first end of the third resistor R3 are connected to the first input end of the signal amplifier A. The second end of the third resistor R3 is grounded. The second filtering unit 24 includes a second capacitor C2 and a fourth resistor R4. The first end of the fourth resistor R4 is connected to the output end of the signal amplifier A. The second end of the fourth resistor R4 and the first end of the second capacitor C2 are connected to the signal output end P3 to output the detection output signal M3, and the second end of the second capacitor C2 is grounded.

[0059] Specifically, for the moisture detection circuit 100 provided in the present application, during the moisture detection stage, the detection enable signal EN controls the switch device U to conduct, and the detection drive signal M1 enters the first detection electrode head P1 through the switch device U. When the first detection electrode head P1 and the second detection electrode head P2 come into contact with the permeation medium on the skin, the detection drive signal M1 contacts the permeation medium through the first detection electrode head P1 to generate a corresponding detection signal M2 at the second detection electrode head P2. The detection signal M2 then reaches the first input end of the signal amplifier A through the first capacitor C1. The third resistor R3 and the first capacitor C1 form a high-pass filter. The diode D plays a clamping and fast discharge role when the capacitor discharges in reverse. The signal amplifier A amplifies the detection signal M2 by a preset multiple through the first resistor R1 and the second resistor R2, so as to detect weak signals when the skin is dry. The output end of the signal amplifier A then forms a low-pass filter through the fourth resistor R4 and the second capacitor C2 to obtain a DC signal for AD sampling by the control chip, and the moisture content of the permeation medium is judged through the AD value.

[0060] In addition, for the moisture detection circuit 100 provided in this application, the detection drive signal M1 can be isolated by the switching device U, enabling the iontophoresis electrode group and the moisture detection electrodes (the first detection electrode head P1 and the second detection electrode head P2) to be on the same side. When there is a signal in the iontophoresis electrode group (with a peak-to-peak value as high as 70VPP), the detection enable signal EN controls the switching device U to cut off, and the iontophoresis electrode group will not form a loop through the detection drive signal M1, thus not changing the iontophoresis electric field. Without the switching device U, during iontophoresis, since the electric field distribution is changed, the iontophoresis signal enters the moisture detection electrodes through the skin to form a loop, which will cause the human body to feel a tingling sensation. In addition, due to the relatively large resistance of the third resistor R3 (such as 1M) of the second detection electrode to the ground, it is a high resistance to the skin and will not cause a change in the electrode electric field. Therefore, no additional switching device U is required to isolate the second detection electrode.

[0061] The diode D not only allows the charges stored in the first capacitor C1 and the skin capacitance to be quickly discharged, but also protects the negative voltage value at the first input terminal of the signal amplifier A from exceeding the voltage drop of the diode D, thereby avoiding damage to the signal amplifier A.

[0062] See Figure 6 , Figure 6 which is a schematic flowchart of an embodiment of the moisture detection method provided in this application. This application also provides a moisture detection method, including:

[0063] Step S1: In response to the beauty device being in the moisture detection stage, configure the detection enable signal to enable the input unit of the moisture detection circuit to be in an excited state, and transmit the detection drive signal to the first detection electrode head;

[0064] Specifically, when the input unit is configured to represent that the beauty device is in the moisture detection stage in response to the detection enable signal, the input unit is excited, transmits the received detection drive signal to the first detection electrode head, and then outputs the detection drive signal to the permeation medium through the first detection electrode head.

[0065] Among them, when the beauty device is working, it includes an iontophoresis stage and a moisture detection stage. In the iontophoresis stage, an iontophoresis electric field is generated by the iontophoresis electrode group at a preset frequency. The iontophoresis electric field can promote the permeation medium to penetrate into the user's skin, thereby achieving a beauty effect. The moisture detection stage is used to detect the moisture content of the permeation medium.

[0066] Among them, to prevent the penetration-enhancing signal in the penetration-enhancing stage from forming a circuit through the moisture detection electrode and interfering with the moisture detection signal, and to avoid the relevant signals of moisture detection in the penetration-enhancing stage from damaging the electric field formed by the penetration-enhancing electrode, resulting in a tingling sensation during the penetration-enhancing process. In the embodiment of the present application, the working time periods of the moisture detection stage and the penetration-enhancing stage are set not to overlap. It can be located in the gap between multiple penetration-enhancing stages or in the non-power output time period of the penetration-enhancing stage, so as to detect the moisture content of the penetration medium.

[0067] Step S2: In response to the input unit being in an excited state, based on the detection drive signal on the first detection electrode head and the penetration medium between the first detection electrode head and the second detection electrode head, a corresponding detection signal is generated on the second detection electrode head;

[0068] Specifically, since the detection drive signal is transmitted to the second detection electrode head through the penetration medium, and the moisture content of the penetration medium continuously decreases as the penetration-enhancing process progresses, therefore, a corresponding detection signal is generated on the second detection electrode head based on the detection drive signal and the moisture content of the penetration medium.

[0069] Step S3: The detection signal is processed and output by the output unit of the moisture detection circuit, where the detection output signal output by the output unit represents the moisture content of the penetration medium.

[0070] Specifically, in the moisture detection method provided in the present application, the input unit is set to be excited only in the moisture detection stage, which avoids the penetration-enhancing signal in the penetration-enhancing stage from forming a circuit through the moisture detection electrode and interfering with the moisture detection signal, and can also avoid the detection drive signal in the penetration-enhancing stage from damaging the electric field formed by the penetration-enhancing electrode, resulting in a tingling sensation during the penetration-enhancing process. Therefore, in the present application, the first detection electrode head and the second detection electrode head in the moisture detection circuit can be arranged in the same plane as the penetration-enhancing electrode group, and their working time periods do not overlap, so the above problems will not occur, and the beauty instrument can detect the moisture content of the penetration medium during the penetration-enhancing gap.

[0071] See Figure 7 , Figure 7 which is a schematic flowchart of another embodiment of the moisture detection method provided in the present application. In one embodiment, the moisture detection method further includes:

[0072] Step S4: In response to the moisture content of the penetration medium represented by the detection output signal being lower than a preset value, corresponding operations are performed.

[0073] Specifically, when the moisture content of the penetration medium represented by the detection output signal is lower than the preset value, an alarm can be given to prompt the user to remind the user to reapply the penetration medium on the skin, or reduce the power output of the beauty instrument to perform penetration-enhancing on the penetration medium with a small moisture content, so as to avoid waste and improve the user experience.

[0074] The above are only the embodiments of the present application, and do not thus limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present application.

Claims

1. A moisture detection circuit, applied to a beauty device, characterized in that, Comprising: A first detection electrode head and a second detection electrode head, configured to contact the user's skin, and the first detection electrode head and the second detection electrode head are non-contact with each other; An input unit, connected to the first detection electrode head, and receiving a detection drive signal and a detection enable signal. When the detection enable signal is configured to indicate that the beauty instrument is in the moisture detection stage, the input unit is excited to transmit the received detection drive signal to the first detection electrode head; An output unit, connected to the second detection electrode head. In response to the input unit being in an excited state, based on the detection drive signal on the first detection electrode head and the permeation medium between the first detection electrode head and the second detection electrode head, the second detection electrode head generates a corresponding detection signal and outputs it after being processed by the output unit. Among them, the detection output signal output by the output unit characterizes the moisture content of the permeation medium.

2. The moisture detection circuit according to claim 1, wherein The input unit includes a switching device, and the switching device includes an optocoupler or a relay; Wherein, when the switching device is configured to be in a conducting state by the detection enable signal, the input unit is excited to transmit the received detection drive signal to the first detection electrode head.

3. The moisture detection circuit according to claim 2, characterized in that, The switching device includes an optocoupler, and the optocoupler includes: A control terminal, for receiving the detection enable signal; A first path terminal, for receiving the detection drive signal; A second path terminal, connected to the first detection electrode head; In response to the control terminal being configured to be in a conducting state by the detection enable signal, the optocoupler conducts, and the detection drive signal is transmitted to the first detection electrode head through the optocoupler.

4. The moisture detection circuit according to any one of claims 1-3, characterized in that, The output unit includes: A signal amplification unit, connected to the second detection electrode head, for amplifying and processing the detection signal generated by the second detection electrode head and outputting it; A protection unit, connected to the signal amplification unit, for protecting the signal amplification unit.

5. The moisture detection circuit according to claim 4, wherein The signal amplification unit includes: A signal amplifier, the signal amplifier includes a first input terminal, a second input terminal and an output terminal, and the first input terminal of the signal amplifier is connected to the second detection electrode head; A first resistor and a second resistor, the first end of the first resistor and the first end of the second resistor are connected to the second input terminal of the signal amplifier, the second end of the first resistor is connected to the output terminal of the signal amplifier, and the second end of the second resistor is grounded.

6. The moisture detection circuit according to claim 5, wherein The protection unit includes a diode, the cathode of the diode is connected to the first input terminal of the signal amplifier, and the anode of the diode is grounded.

7. The moisture detection circuit according to claim 4, wherein The output unit further includes: A first filtering unit, the first filtering unit is connected between the second detection electrode head and the signal amplification unit, for filtering the detection signal; A second filtering unit, the second filtering unit is connected between the output terminal of the signal amplification unit and the signal output terminal, for filtering the detection output signal output by the signal amplification unit.

8. A moisture detection method, applied to a beauty device, characterized in that, Comprising: In response to the beauty instrument being in the moisture detection stage, configure a detection enable signal to enable the input unit of the moisture detection circuit to be in an excited state, and transmit a detection drive signal to the first detection electrode head; In response to the input unit being in an excited state, based on the detection drive signal on the first detection electrode head and the permeation medium between the first detection electrode head and the second detection electrode head, generate a corresponding detection signal on the second detection electrode head; Process and output the detection signal through the output unit of the moisture detection circuit, wherein the detection output signal output by the output unit characterizes the moisture content of the permeation medium.

9. The moisture detection method according to claim 8, wherein It further includes: In response to the moisture content of the permeation medium characterized by the detection output signal being lower than a preset value, perform corresponding operations.

10. A beauty device, characterized in that, It includes: A moisture detection circuit, the moisture detection circuit according to any one of claims 1-7; At least one set of electroosmotic promotion electrode groups for outputting an electroosmotic promotion electric field.

11. The beauty instrument according to claim 10, wherein, The electroosmotic promotion electrodes in the electroosmotic promotion electrode group, the first detection electrode head and the second detection electrode head in the moisture detection circuit are arranged in the same plane.

12. The beauty instrument according to claim 10 or 11, characterized in that, The working time period of the moisture detection stage does not overlap with the working time period of the electroosmotic promotion stage of the beauty instrument; in the electroosmotic promotion stage, at least one set of the electroosmotic promotion electrode groups in the beauty instrument is configured to output an electroosmotic promotion electric field.

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