Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
Referring to fig. 1, fig. 1 shows a functional block diagram of an EMS and RF function switching circuit according to an embodiment of the present invention, which includes a controller 100, a switch circuit 200, an EMS/RF control circuit 300, a first contact point TB1 and a second contact point P2, wherein one end of the switch circuit 200 is electrically connected to the first contact point TB1 and the second contact point P2, respectively, and the other end is electrically connected to the EMS/RF control circuit 300 under the control of the controller 100, and the first contact point TB1 and the second contact point P2 are used for contacting a human body.
The EMS/RF control circuit 300 is electrically connected to the controller 100, and is configured to receive a first frequency signal sent by the controller 100, and start an EMS function according to the first frequency signal, and the EMS/RF control circuit 300 is further configured to receive a second frequency signal sent by the controller 100, and start an RF function according to the second frequency signal. The controller 100 is configured to obtain a first detection signal flowing through the second contact point, and adjust the transmission power of the first frequency signal and the second frequency signal according to the first detection signal.
As shown in fig. 1, for an EMS/RF control circuit, it contains two functions, namely an EMS function and an RF function, wherein the RF function is a very important part of the electromagnetic spectrum, and both radio and microwave energy belongs to the category of electromagnetic radiation energy, which is commonly referred to as radio frequency. The radio frequency in units of frequency can range from hundreds of KHZ to hundreds of MHZ. When the radio frequency starts to work, the polarity of the electrode of the electric field in the biological tissue can be changed for millions times within 1 second, the polarity of the tissue particles charged in the electric field is changed at a frame frequency, the natural impedance of the dermal tissue can generate heat under the action of electron movement, and the friction caused by the electron movement can cause the deep layer of the skin to generate columnar distribution heating effect. This thermal effect begins to alter the collagen, causing it to shrink, and new collagen is regenerated, resulting in dermis remodeling and thickening. The EMS function is called ELECTRICAL MUSCLE STIMULATION, chinese name muscle current stimulation technology. The principle is that the motor nerve is directly stimulated by external current to induce the muscle to contract and move, thereby directly and effectively achieving the purpose of muscle augmentation or shaping. The low frequency current frequency is able to continue to move the muscle at an effective frequency and if the frequency of use is higher than a certain frequency, the muscle tone begins to decrease. Muscles cannot meet their neurophysiologic conditions, and thus an ideal exercise effect cannot be obtained. In addition, the muscle uses energy and consumes oxygen during exercise. Therefore, the embodiment of the invention realizes flexible switching of EMS functions and RF functions by sending the first frequency signal and the second frequency signal with different frequencies to the EMS/RF control circuit through the controller.
Meanwhile, since the different areas of the skin contact may cause different effects when people use the EMS function and the RF function, in the embodiment of the present invention, the controller further obtains the first control signal flowing through the second contact point at the first control signal output end, and adjusts the output power of the first frequency signal or the second frequency signal according to the first control signal. When the first contact point and the second contact point are in contact with the skin more, the face impedance is larger, the first detection signal value is lower, then the controller regulates down the emission power of the first frequency signal or the second frequency signal, when the first contact point and the second contact point are in contact with the skin less, the first detection signal value is higher because the skin generates smaller resistance value, and then the controller regulates up the emission power of the first frequency signal or the second frequency signal, so that a better effect is generated.
Therefore, it can be seen that, in the embodiment of the present invention, the controller sends the first frequency signal and the second frequency signal with different frequencies to the EMS/RF control circuit, so as to implement flexible switching between the EMS function and the RF function, and meanwhile, the controller can timely adjust the transmitting power of the EMS/RF circuit according to the condition of contacting the skin by acquiring the first detection signal flowing through the second contact point, thereby saving power and improving the effect of using the EMS function and the RF function by the user.
Furthermore, when the EMS/RF control circuit operates in the EMS mode, the frequency of the output carrier signal of the controller is relatively low, and when the electrical signal passing through the second contact point P2 is measured, there is often an error, which results in inaccurate measurement and failure to accurately control the EMS/RF control circuit 300, and the embodiment of the application further proposes to provide a second loop detection circuit 600, as shown in fig. 2, where the second loop detection circuit 600 is electrically connected to the second contact point P2, and detects the electrical signal passing through the second contact point P2 and then outputs a second detection signal to the controller 100, and the controller 100 controls the EMS/RF control circuit 300 according to the second detection signal. The second loop detection circuit 600 performs more sensitive detection on the electrical signal flowing through the second contact point P2, so that the contact condition between the second contact point P2 and the skin can be obtained more accurately, and the controller 100 adjusts the transmitting power of the first frequency signal and the transmitting power of the second frequency signal according to the second detection signal.
Fig. 3 is a schematic diagram of the EMS and RF function switching circuit, where the switching circuit 200 is an electrically controlled double-pole switch, one of which is connected to the first contact point TB1, and the other of which is connected to the second contact point P2, and the first contact point TB1 and the second contact point P2 are used for contacting the skin.
The controller 100 receives the first detection signal through the port CKECK P, receives the second detection signal through the CHECK P1 port, controls the EMS function of the EMS/RF control circuit 300 through the EMS-PWM port, and controls the RF function of the EMS/RF control circuit 300 through the RF-PWM port.
In order to describe the EMS and the RF function switching circuit in more detail, implementation of the EMS/RF control circuit 300 and the controller 100 circuit will be described below.
As shown in fig. 4A, a circuit diagram of a controller 100 provided in an embodiment of the present invention may be a conventional programmable controller 100, such as a PLC, a digital processing chip DSP, or a single chip microcomputer, in this embodiment, an STM32F030R8T6 programmable control chip is used as the controller 100, and specific pins include a signal input pin, a signal output pin, and an input and output pin, as shown in fig. 4A, for example, a DCDC EN pin, where the controller 100 is used as an enabling terminal to enable each control unit, an RF-PWM pin, which is used as an RF control signal output terminal, connected to the EMS/RF control circuit 300, an EMS-PWM pin, which is used as an EMS control signal output terminal, connected to the EMS/RF control circuit 300, and KG1 and KG2 pins, which are used to output control signals to the switch circuit 200, a CHECK P1 pin, which is used to receive a second detection signal, and a CHECK P2 pin, which is used to receive a first detection signal. More specific and detailed chip pin descriptions are not described in detail herein, and a person skilled in the art can select an appropriate pin to control according to needs, hereinafter, when a specific pin is used, the pin name will be directly referred to, and can be directly understood as a pin connection with the controller 100, and a corresponding relationship with the controller 100 will not be described.
As shown in FIG. 4B, in the voltage stabilizing circuit diagram provided by the embodiment of the invention, a wireless charging mode is adopted to provide power for the EMS and RF function switching circuit, the wireless charging circuit is designed by DS_JDS9002, and is an integrated wireless receiving, lithium battery protection chip and three-in-one chip for charging management, the maximum charging current is 450mA, a special communication protocol is provided, the voltage stabilizing chip is designed by XC6206P33 chip, and the output is stable and is 3.3V, and the minimum leakage current is 7uA.
Fig. 5 is an EMS/RF control circuit diagram provided by an embodiment of the present invention, where the EMS/RF control circuit diagram is composed of a transformer, a MOS transistor driving circuit, a boost circuit, and the like, and the controller 100 outputs waveforms with different frequencies through an EMS-PWM pin to drive the MOS transistor to operate. When the controller 100 sends out a carrier wave of 1MHz through the EMS-PWM pin, the MOS tube is driven to work, the transformer outputs a sine wave signal of high voltage to generate a high-frequency signal, and the high-frequency signal acts on the skin to generate a warming effect, so that the regeneration of collagen at the bottom layer of the skin is promoted. When the controller 100 sends out a 33Hz carrier wave through the EMS-PWM pin, the MOS tube is driven to work, the transformer outputs a low-frequency alternating current signal, and when the low-frequency alternating current signal acts on the skin, the electric stimulation is generated, so that the effect of skin tightening is achieved.
Specifically, as shown in fig. 5, the EMS/RF control circuit 300 includes an EMS/RF power supply circuit, a transformer L4, an N-MOS transistor Q15, and a transistor Q17. As can be seen from fig. 5, the EMS/RF power supply circuit includes an NPN transistor Q5, a PMOS transistor U7, a boost module U6, and the like. The voltage stabilizing circuit provides voltage for the EMS/RF power supply circuit through a VBAT pin and is connected with a PMOS tube U7, a grid electrode G of the PMOS tube U7 is connected with an enabling end DCDC-EN of the controller 100 through an NPN triode Q5, the enabling end DCDC-EN is connected with a base electrode of the triode Q5 through a current limiting resistor R38, the grid electrode G of the PMOS tube U7 is connected with a collector electrode of the triode Q5, an emitting electrode of the triode Q5 is grounded, the controller 100 controls the on and off of the PMOS tube U7 through the control triode Q5, and the PMOS tube U7 is used for protecting the boost module U6 from being damaged. The drain D of the PMOS transistor U7 is connected to the boost module U6 through a current limiting resistor R47, the limiting current is i=0.3/r47=0.3/0.2=1.5 a, ec1, c29 is a filter capacitor, after passing through the boost module U6, the output voltage vout=1.25 (1+r35/R44) =13.75V, and VOUT is connected to the tap 8 of the transformer L4, for providing the input voltage to the transformer.
The primary coil of the transformer L4 comprises taps 6, 8 and 10, an output end VOUT of the boosting module U6 is connected with the tap 8, and the tap 10 of the transformer L4 is grounded. The tap 6 of the transformer L4 is connected with the N-MOS tube Q15, the secondary coil of the transformer L4 comprises taps 3 and 6, the tap 3 is connected with the first contact point TB1, and the tap 6 is connected with the second contact point P2 for contacting a human body.
The controller 100 is connected with the grid electrode of the N-MOS transistor Q15 through an EMS-PWM pin, and is configured to output carrier signals with different frequencies to the transformer L4 through the N-MOS transistor Q15. The drain electrode of the N-MOS tube Q15 is connected with the tap 6 of the transformer L4, and the source electrode of the N-MOS tube Q15 is grounded through a current limiting resistor R31. Wherein the N-MOS tube is an N-channel MOS tube.
In order to more accurately control the transmitting power of the EMS/RF control circuit 300, so that the transmitting power can be dynamically adjusted according to the contact condition between the first contact point TB1 and the second contact point P2 and the skin, in the embodiment of the present invention, a detecting point S1 is further disposed at the source of the N-MOS transistor Q15, and is used as a first detecting signal output end, and connected to the CHECK P2 pin of the controller 100. The controller 100 can detect an electric signal flowing through the second contact point P2 through the CHECK P2, thereby acquiring a first detection signal. When the controller 100 obtains that the first detection signal is empty, it indicates that the second contact point P2 is not in contact with the skin, when the first detection signal is too large, it indicates that the second contact point P2 is in less contact with the skin, and it is necessary to increase the transmitting power, and when the first detection signal is too small, it indicates that the second contact point P2 is in more contact with the skin, and it is necessary to decrease the transmitting power. Of course, the control process may be set in a reverse manner, and is not particularly limited.
Furthermore, since the transformer generates reverse voltage during the working process, the MOS tube is easy to break down, and in order to further protect the MOS tube, the embodiment of the invention sets the diode D8 at the tap 10 of the transformer L4, the negative electrode of the diode D8 is connected with the tap 10 of the transformer L4, and the positive electrode is grounded. When the transformer generates negative pressure, the diode D8 is conducted to ground the tap 10 of the transformer, so that the N-MOS tube Q15 is prevented from being broken down due to the negative pressure, and the N-MOS tube Q15 is protected.
When the controller 100 transmits a low-frequency signal of 33HZ through the EMS-PWM pin, the transformer L4 outputs a low-frequency ac signal, and when the low-frequency ac signal acts on the skin, an electro-stimulation effect is generated, thereby achieving the effect of tightening the skin. When the controller 100 sends out a carrier wave of 1MHz through the EMS-PWM pin, the MOS tube is driven to work, the transformer outputs a sine wave signal of high voltage to generate a high-frequency signal, and the high-frequency signal acts on the skin to generate a warming effect, so that the regeneration of collagen at the bottom layer of the skin is promoted.
Further, in order to further improve the effect of the controller 100 transmitting the carrier signal, the embodiment of the present invention further adds an NPN transistor Q17 to the EMS/RF control circuit 300, as shown in fig. 6, the controller 100 is connected to the base of the NPN transistor Q17 through a pin RF-PWM, and is connected to the collector of the transistor Q17 through a tap 10 of the transformer L4, and the emitter of the transistor Q17 is grounded. The controller 100 may alternately send the first frequency signal or the second frequency signal to the gate of the N-channel MOS transistor Q15 and the base of the NPN-type transistor Q17 through two pins of the EMS-PWM and the RF-PWM at intervals, so that the transformer has higher working efficiency.
Therefore, it can be seen that the EMS/RF control circuit 300 provided in the embodiment of the present invention realizes sharing of EMS functions and RF functions by transmitting different frequency signals by the controller 100, simplifying the circuit, and meanwhile, by setting the detection point S1, the controller 100 can obtain the contact degree between the second contact point P2 and the skin in real time, so as to accurately adjust the transmitting power, and further, by setting a diode at the tap 10 of the transformer, the N-MOS is protected from breakdown, and a good protection effect is achieved. Furthermore, in order to make the transformer work with high efficiency, the symmetrical two carrier signal transmitting ends are arranged to transmit carrier signals at intervals, so that the transformer has higher working efficiency.
Furthermore, because the carrier signal emitted by the controller is lower in frequency during the EMS function, and the electrical signal generated on the skin surface and flowing through the second contact point is lower, the accuracy is often insufficient when the detection is performed through the first detection signal end, so that the embodiment of the invention further increases the second loop detection circuit. In fig. 7, the second loop detection circuit 600 includes a PNP type triode Q18 and an NPN type triode Q19 to form a detection circuit, and detects an electrical signal flowing through the second node contact, outputs a second detection signal, and improves the detection sensitivity of the second contact P2. In fig. 7, the second contact point P2 is electrically connected to the emitter of the PNP type triode Q18, the collector of the PNP type triode Q18 outputs a second detection signal to the controller 100 through the resistor R50, the base of the PNP type triode Q18 is connected to the collector of the NPN type triode Q19, the base of the NPN type triode Q19 is connected to the enabling terminal DCDC EN of the controller 100, the emitter of the NPN type triode Q19 is grounded, and the collector of the PNP type triode Q18 is connected to the CHECK P1 port of the controller 100 through the pull-up resistor R53 through the current limiting resistor R50. Meanwhile, in order to prevent the current from flowing back and breaking down the PNP type triode Q18, the embodiment of the invention further provides a diode D9 at the collector of the PNP type triode Q18, and the negative electrode of the second diode D9 is connected to the collector of the PNP type triode Q18, and the positive electrode is grounded. Through the second loop detection circuit 600, when the controller 100 sends out an enable signal through the DCDC EN port, the NPN transistor Q19 is turned on. When no electric signal passes through the second contact point P2, the PNP transistor Q18 is in an off state, and when current passes through the second contact point P2, even if the current is very weak, the PNP transistor Q18 will be turned on as long as the trigger condition of the emitter of the PNP transistor Q18 is satisfied, and the second detection signal output terminal will output a second detection signal to the CHECK P1 port of the controller 100.
Through the above-mentioned second loop detection circuit 600, when the EMS/RF control circuit 300 is in the EMS mode, since the current flowing through the second contact point P2 is weak, at this time, a current signal is generated at the second contact point P2, and the sensitivity of the current flowing through the second contact point P2 is adjusted by the second detection signal, so as to improve the detection sensitivity, and the second detection signal is output, so that the controller 100 can more accurately know the contact condition of the first contact point TB1 and the second contact point P2 with the skin.
As can be seen from the above, by providing the second loop detection circuit 600, the problem of inaccurate detection caused by too small current under the EMS function is solved, so that the controller 100 can more accurately grasp the contact condition between the first contact point TB1 and the second contact point P2 and the skin, and can more accurately control the EMS/RF control circuit 300.
Furthermore, the embodiment of the invention also provides a massage device, which comprises the EMS and the RF function switching circuit, wherein the specific structure diagram of the massage device is shown in fig. 8, and the massage device is further added with a skin measurement function, a vibration massage function, a refrigeration and heating function and a photon function on the basis of the EMS function and the RF function. Specifically, the massage apparatus includes a controller 100, a switch circuit 200, an EMS/RF control circuit 300, a skin test circuit 400, a first contact point TB1, a first loop detection circuit 500, a second contact point P2, a third contact point P1, a third loop detection circuit 700, and a third load circuit, where the third load circuit includes a motor driving circuit 800, a buzzer 900, a peltier driving circuit 1000, and a photon driving circuit 1100.
One end of the switch circuit 200 is electrically connected to the first contact point TB1 and the second contact point P2, the other end is electrically connected to the EMS/RF control circuit 300 and the skin measurement circuit 400 under the control of the controller 100, the switch circuit 200 is an electronically controlled switch circuit 200, and the switch circuit 200 may connect the first contact point TB1 and the second contact point P2 to the EMS/RF control circuit 300, or may electrically connect the first contact point TB1 and the second contact point P2 to the skin measurement circuit 400, so that the EMS/RF control circuit 300 and the skin measurement circuit 400 contact the skin through the first contact point TB1 and the second contact point P2, respectively.
The first contact point TB1 has one end connected to the switch circuit 200 and the other end connected to the first loop detection circuit 500, the first contact point TB1 is a bare electrode, that is, the first loop detection circuit 500 may contact the human body through the first contact point TB1, the first loop detection circuit 500 is started or disconnected under the control of the controller 100, for detecting whether the first contact point TB1 contacts the human body, the second contact point P2 has one end connected to the switch circuit 200 and the other end connected to the human body, the second contact point P2 is also a bare electrode, the third contact point P1 is used to contact the human body and connected to the third loop detection circuit 700, the third loop detection circuit 700 is electrically connected to the controller 100, for detecting a third detection signal between the first contact point TB1 and the third contact point P1, and transmitting the third detection signal to the controller 100, and the controller 100 performs driving of the buzzer driver circuit 900, the driver circuit 1100, and the like according to the third detection signal.
The EMS/RF control circuit 300 is electrically connected to the controller 100 and transmits an EMS signal or an RF signal under the control of the controller 100, and the EMS/RF control circuit 300 is further configured to transmit a first detection signal flowing through the second contact point P2 to the controller 100. Since one end of the second contact point P2 contacts the human body and the other end is connected to the switch circuit 200, when the switch circuit 200 turns on the second contact point P2 and the EMS/RF circuit, the EMS/RF circuit can detect an electrical signal flowing through the second contact point P2 and generate a first detection signal.
When the controller 100 controls the switch circuit 200 to electrically connect the first contact TB1 and the second contact P2 with the EMS/RF control circuit 300, the controller 100 receives the first detection signal and adjusts the EMS/RF control circuit 300 according to the first detection signal, that is, when the controller 100 controls the EMS/RF circuit to operate. The first detection signal may change in real time according to the magnitude of the facial impedance, and the change may also reflect the contact degree between the first contact point TB1 and the second contact point P2 and the skin, and the skin tightness, and the EMS/RF control circuit 300 may adjust the transmitting power of the EMS function or the RF function according to the first detection signal, so as to process the skin with an optimal power.
When the controller 100 controls the switch circuit 200 to electrically connect the first contact point TB1 and the second contact point P2 with the skin measurement circuit 400, the controller 100 controls the skin measurement circuit 400, so that the skin measurement circuit 400 can be started to measure skin. Due to the control of the switching circuit 200, the skin test circuit 400 and the EMS/RF circuit can only be separately activated, avoiding the collision of the skin test circuit 400 and the EMS/RF functions.
When the controller 100 controls the switch circuit 200 to be turned off, the controller 100 starts the first loop detection circuit 500 to obtain a third detection signal, and controls the third load circuit according to the third detection signal. When the third contact point P1 is in contact with the skin, the third loop detection circuit 700 obtains a third detection signal flowing through the third contact point P1, and determines whether the contact is made with the skin according to the third detection signal, and when the contact is made, the controller 100 starts the third load circuit, in this way, it is avoided that other functions are started without contact with the skin, and damage to the human body is caused while power is wasted.
According to the embodiment, the massager realizes reasonable switching of the EMS/RF function, the skin measurement function and the third party load function by arranging the switch circuit 200, realizes coordination and coexistence of the functions, reduces the complexity of equipment and avoids mutual independence among a plurality of functions. Meanwhile, the controller 100 controls the EMS/RF control circuit 300 and the third load circuit by acquiring the first detection signal and the third detection signal, respectively, so that accurate scheduling of functions is realized, and power waste and damage to a human body are avoided.
As shown in FIG. 9, the massage machine according to the embodiment of the present invention is described in more detail. As shown in fig. 9, the switch circuit 200 is an electrically controlled double-pole double-throw switch, wherein an intermediate point of one of the two-pole double-throw switches is connected to the first contact point TB1, and an intermediate point of the other one of the two-pole double-throw switches is connected to the second contact point P2, and meanwhile, one throw of the two-pole double-throw switch is electrically connected to the EMS/RF control circuit 300, and the other throw is electrically connected to the skin measurement circuit 400, i.e., the switch circuit 200 under the control of the controller 100 can electrically connect the first contact point TB1 and the second contact point P2 to the EMS/RF control circuit 300, or can electrically connect the first contact point TB1 and the second contact point P2 to the skin measurement circuit 400, and is a double-throw switch, so that the first contact point TB1 and the second contact point P2 can only be selectively connected to the EMS/RF control circuit 300 and the skin measurement circuit 400, but cannot be simultaneously connected.
One end of the first contact point TB1 is connected to one of the two-pole double-throw switches, the other end of the first contact point TB is connected to the first loop detection circuit 500 through a thyristor PCR606, a control electrode of the thyristor PCR606 is connected to a KG3 port of the controller 100 through a resistor R43, and the controller 100 controls the on-off of the first thyristor through the control electrode, so that the on-off of the first loop detection circuit 500 can be controlled. When the third load circuit needs to be started, the controller 100 controls the switch circuit 200 to disconnect the first contact point TB1 and the second contact point P2 from the EMS/RF control circuit 300 and the skin test circuit 400, and opens the thyristor PCR606 through the KG3 port, so that the first loop detection circuit 500 is connected to the first contact point TB1, and the controller 100 starts the first loop detection circuit 500 through the DR-PWM port to provide power for the first contact point TB1, so that an electrical signal can be formed between the first contact point TB1 and the third contact point P1, the electrical signal between the first contact point TB1 and the third contact point P1 is detected, a third detection signal is generated, and the controller 100 receives the third detection signal through the CHECK S port and controls the third load circuit according to the third detection signal.
The controller 100 receives a first detection signal through a port CKECK P, receives a second detection signal through a CHECK P1 port, receives a third detection signal through a CHECK S port, controls the EMS function of the EMS/RF control circuit 300 through an EMS-PWM port, controls the RF function of the EMS/RF control circuit 300 through an RF-PWM port, and controls the skin measurement circuit 400 through an HZ port. The third load circuit includes a variety of other functional circuits.
As can be seen from fig. 8, the massage apparatus includes an EMS and an RF function, and further includes a skin measurement function, a vibration massage function, a cooling and heating function, a photon function, etc., and the above functional modules form a multifunctional massage apparatus, which skillfully realizes the switching and combination of various functions, simplifies the structure of the massage apparatus, and integrates a plurality of original independent devices into a multifunctional device, and detailed description will be made on the skin measurement function, the vibration massage function, the cooling and heating function, and the photon function.
Fig. 10A shows a circuit diagram of a skin measurement circuit 400 according to an embodiment of the present invention, where the skin measurement circuit 400 is mainly used for measuring moisture of human skin, and can obtain skin conditions, so as to adjust the EMS/RF function or other third party load functions according to the skin conditions. The skin measurement circuit 400 includes a voltage follower circuit, a skin contact point, and an AD detection circuit.
The skin contact points are a first contact point TB1 and a second contact point P2, the skin measurement circuit 400 is connected with the first contact point TB1 through a contact point 4 and the second contact point P2, is connected with the first contact point TB1 through a contact point 5, and contacts the skin through the first contact point TB1 and the second contact point P2. The contact 4 is the input of the AD detection circuit and the contact 5 is the output of the voltage follower circuit.
The circuit structure of the voltage follower circuit is shown in fig. 10A, and the voltage follower circuit comprises a current limiting resistor R62 and a single operational amplifier U9A. The square wave signal is input into the single operational amplifier U9A through the current limiting resistor R62, and the output end of the single operational amplifier U9A and the first contact point TB1, when the controller 100 outputs the carrier signal through the HZ pin, after passing through the voltage follower circuit, output the signal with the same waveform at the first contact point TB1 to reach the skin.
The AD detection circuit comprises an isolation capacitor C24, a filter capacitor C26 and a diode D11, wherein the second contact point P2 is connected with one end of the isolation capacitor C24, the other end of the isolation capacitor C24 is connected with the positive electrode of the diode D11, the negative electrode of the diode D11 is connected with the filter circuit composed of resistors R63 and C26 and is connected with an FZ_AD pin of the controller 100, and a skin detection result is output to the controller 100.
The specific skin measurement process is that the controller 100 outputs a 4KHZ square wave to a voltage follower circuit through an HZ pin, the voltage follower circuit generates a signal with the same waveform as the input signal at a first contact point TB1, the output signal is added to the skin in contact, a sharp waveform is formed at a second contact point due to the capacitive reactance characteristic of the skin, after the waveform passes through an AD detection circuit, a stable fz_ad signal is output, the simulation effect is as shown in fig. 10B, the simulation waveform shows that the 4KHZ square wave signal finally outputs a direct current signal after passing through the detection circuit and the skin of the human body, and the output voltages obtained by different human body impedances are different.
In the actual skin measurement process, since the electrical impedance characteristics of human tissue are much more complex than those of a general object, the most obvious characteristic is that the value of the electrical impedance changes with the change of the measurement frequency. Since the liquid tissue in the cells of the human body is not simply characterized by electric resistance, the effect of the intracellular water and the cell membrane is more in the form of capacitance. In order to analyze more skin characteristics and obtain multi-frequency point information, the embodiment of the invention adopts square wave pulse signals as excitation sources, so that the method is easy to combine with a digital circuit and has wider frequency spectrum. As shown in fig. 10C, a curve of moisture corresponding to the acquired AD value shows a correspondence between the voltage value and the moisture content. As shown in fig. 10D, a water-oil comparison curve obtained by AD detection is shown. According to the curve, the water-oil characteristics of the human skin can be measured by making a corresponding algorithm, so that the oil, dryness, mixability and other skin characteristics of the human skin are reflected, and the functions of different gears are started according to different skin characteristics, so that the effect of improving the skin is better achieved.
Therefore, it can be seen that, in the skin test circuit 400 according to the embodiment of the present invention, by providing the voltage follower circuit and the AD detection circuit, the controller 100 transmits the square wave signal to the voltage follower circuit and applies the square wave signal to the skin of the human body, and the AD detection circuit detects the signal generated by the skin of the human body, which accurately reflects the condition of the skin of the human body, so that the controller 100 can adjust the EMS/RF control circuit 300 or other third party load circuits according to the detection result, and can implement skin care more accurately.
Further, in practical applications, the EMS/RF function and the skin measurement function need to be separated and cannot be turned on at the same time, and how to coordinate the usage time between the two functions is a very important problem, and it is required to effectively prevent the user from damaging the skin due to misoperation. As shown in fig. 10A, a switching circuit 200 is provided for coordinating EMS/RF functions and skin measurement functions in accordance with an embodiment of the present invention. The switch circuit 200 is an electrically controlled double-pole double-throw switch, wherein the middle point 3 of one switch is connected with the first contact point TB1, the middle point 6 of the other switch is connected with the second contact point P2, one throw of the switch circuit 200 comprises the contact point 2 and the contact point 7, the other throw comprises the contact point 5 and the contact point 4, the controller 100 is connected with the switch controller 100YX-JDQ through KG1 and KG2 pins, when KG1=0 and KG2=1, the 2 pin of the double-pole double-throw switch is connected with the 3 pin, the 7 pin is connected with the 6 pin, the first contact point TB1 and the second contact point P2 are contacted with two sides of human skin, the EMS/RF control circuit 300 is conducted, and meanwhile, the skin measurement circuit 400 is disconnected. When kg1=1 and kg2=0, the 5 pin and 3 pin of the double-pole double-throw switch are connected, the 4 pin and 6 pin are connected, the first contact point TB1 and the second contact point P2 contact two sides of human skin, the skin test circuit 400 is turned on, and meanwhile, the EMS/RF control circuit 300 is turned off, and the skin test function is turned on. Of course, the double pole double throw switch may be in the form of a relay or may be operated as another electrical switch, without limitation.
As can be seen from the above, the embodiment of the present invention conveniently realizes the scheduling of the EMS/RF control circuit 300 and the skin test circuit 400 by setting the switch circuit 200, and prevents the skin from being damaged due to the simultaneous opening caused by the misoperation of the user.
Further, when the EMS/RF control circuit 300 is turned off, the controller 100 needs to activate the third party load function, such as the photon detection function, and also needs to detect whether the first contact point TB1 or the second contact point P2 is in contact with the skin of the person, if the other third party load function is activated without contact with the skin, the damage to the human body is likely to occur, and therefore, the embodiment of the present invention further provides a circuit configuration diagram of the skin contact determination circuit, as shown in fig. 11, which shows a diagram of the first loop detection circuit 500 and the third loop detection circuit 700 for detecting whether the contact point is in contact with the skin.
As shown in fig. 11, the skin contact judging circuit includes a first loop detecting circuit 500 and a third loop detecting circuit 700. The first loop detection circuit 500 comprises a PNP type triode Q13, an NPN type triode Q16 and a silicon controlled rectifier PCR606, wherein the base electrode of the NPN type triode Q16 is connected with a DR-PWM pin of the controller 100 through a current limiting resistor R39 and is used for receiving a control signal of the controller 100, the emitter electrode of the NPN type triode Q16 is grounded, the collector electrode of the NPN type triode Q13 is connected with the base electrode of the PNP type triode Q13 through a resistor R36, the emitter electrode of the PNP type triode Q13 is connected with a voltage of 3.3V, the collector electrode of the PNP type triode Q13 is connected with one end of the silicon controlled rectifier PCR606 through a resistor R17, the other end of the silicon controlled rectifier PCR606 is connected with a first contact point TB1, one end of the silicon controlled rectifier is connected with the collector electrode of the PNP type triode Q13, and the control electrode of the silicon controlled rectifier is electrically connected with a KG3 port of the controller 100. When the controller 100 sends a high level signal through the DR-PWM port and simultaneously controls the scr PCR606 to be turned on through the KG3 port, the PNP transistor Q13 and the NPN transistor Q16 in the first loop detection circuit 500 are turned on to provide a voltage signal for the first contact point TB 1.
The third loop detection circuit 700 includes a third contact point P1, a pull-up resistor R60, and a capacitor C7, where the CHECK S port of the controller 100 is directly connected to the third contact point P1, and is configured to receive a third detection signal.
When the controller 100 needs to start the photon function, the controller 100 outputs a control signal through the DR-PWM port, as shown in the above diagram, the first contact point TB1 contacts the face of the person, the third contact point P1 is a hand electrode plate, DR-PWM controls on and off of the NPN transistor Q16, Q13 is a PNP transistor, when DR-PWM is at a high level, the Q16 transistor is on, while the Q13 transistor is on, R1 is a current limiting resistor and a voltage dividing resistor, PCR606 is a unidirectional thyristor, KG3 is at a high level, the thyristor is on, the voltage reaches the face, when the hand contacts the P1 electrode plate, CHECK-S is at a voltage of about 1.65V, and the system determines that the hand and the face contact the skin simultaneously, and opens the corresponding load at this time. Thereby, the photon driving circuit 1100 is started to work to prevent eyes from being directly damaged when photons are started, or the vibration massage function is started to give an intelligent sense to people, and the Peltier kinetic energy can also be started. The first loop detection circuit 500 and the third loop detection circuit 700 are used for realizing the starting of other functions, so that the safety and the false triggering prevention function are higher.
In fig. 12, a photon driving circuit 1100 is shown, the photon driving circuit 1100 includes NPN transistors Q8, Q9, a red LED lamp LED-R, and a yellow LED lamp LED-Y, and JP1 is a driving board. The driving plate is connected with 3.3V voltage, the base electrode of the triode Q8 is connected with the LED-R through a resistor R19 and used for driving the LED lamp, the collector electrode is connected with the driving plate JP1, the emitter electrode is grounded through a resistor R23, the base electrode of the triode Q9 is connected with the LED-Y through a resistor R20 and used for driving the LED lamp, the collector electrode is connected with the driving plate JP1, and the emitter electrode is grounded through a resistor R20. Therefore, in the embodiment of the present invention, by combining the first loop detection circuit 500, the third loop detection circuit 700 and the photon driving circuit 1100, before the photon driving circuit 1100 is started, the first loop detection circuit 500 and the third loop detection circuit 700 are used to determine whether the first contact point TB1 and the third contact point P1 are in contact with the skin of the human body, and only when the first contact point TB1 and the third contact point P1 are in contact with the skin of the human body, the photon driving circuit 1100 is started, thereby avoiding damage to the human body.
Further, the massage apparatus further includes a peltier driving circuit 1000, as shown in fig. 12 and 13, fig. 13 is the peltier driving circuit 1000, and fig. 12 includes an NTC detection circuit. The peltier driving circuit 1000 is used for heating or refrigerating human skin, is helpful for enlarging and shrinking pores of skin, and can play a good role in tightening skin.
As shown in fig. 13, the peltier circuit is a bridge driving circuit, and includes NPN transistors Q3 and Q4, P-MOS transistors Q1 and Q2, and N-MOS transistors Q10 and Q11, where Q1, Q2, Q10, and Q11 form a bridge driving circuit. The controller 100 controls the peltier driving circuit 1000 through pet+ and PET-ports. The J12PIN is a refrigerating sheet, the refrigerating sheet is a thermocouple, and when current passes through the thermocouple, one junction dissipates heat and the other junction absorbs heat, so that the heating and refrigerating effects can be achieved.
PET+ and PET-are applied to the both sides of refrigeration piece respectively, produce refrigeration and heating's effect, and temperature sensor through PWM waveform control PET+ and PET-and Peltier both ends reaches accurate accuse temperature's effect. The base electrode of the NPN type triode Q3 is connected with the controller, the collector electrode of the NPN type triode Q3 is connected with the grid electrode of the P channel type MOS tube Q2, the drain electrode of the P channel type MOS tube Q2 is connected with the refrigerating sheet, the drain electrode of the N channel type MOS tube Q10 is connected with the refrigerating sheet, and the grid electrode of the N channel type MOS tube Q10 is connected with the controller. The base electrode of the NPN type triode Q4 is connected with the controller, the collector electrode of the NPN type triode Q4 is connected with the grid electrode of the P channel type MOS tube Q1, the drain electrode of the P channel type MOS tube Q1 is connected with the refrigerating sheet, the drain electrode of the N channel type MOS tube Q11 is connected with the refrigerating sheet, and the grid electrode of the N channel type MOS tube Q11 is connected with the controller. The source electrode of the N-channel MOS transistor Q11 is connected with the source electrode of the N-channel MOS transistor Q10 and is grounded through a current detection resistor R13.
When the controller 100 outputs a control signal to the NPN transistor Q3 through the output terminal PET-through the resistor R7 and outputs a control signal to the N-MOS transistor Q10 through the output terminal PET-, the Q3, Q2, Q10 are turned on, and the PET-acts on one side of the cooling sheet, thereby cooling one side of the J12PIN, and achieving the effect of cooling. When the controller 100 outputs a control signal to the NPN transistor Q4 through the output terminal pet+ and the resistor R9, and outputs a control signal to the N-MOS transistor Q11 through the output terminal pet+, the Q4, Q1, Q11 are turned on, and the pet+ acts on the other side of the cooling sheet, so as to heat the J12PIN, thereby achieving the heating effect. Of course, pet+ may be added to the cooling side and PET-may be added to the heating side, so that the cooling sheet may have a cooling or heating effect.
Further, in order to more accurately regulate the temperature, in the embodiment of the present invention, a current detection resistor R13 is disposed between the sources of the Q11 and Q10, a temperature detection point is disposed between the R13 and the sources and is connected to the CHECK WEN pin of the controller 100, the controller 100 can detect the current driven by peltier by detecting the voltage CHECKWEN, and when the temperature is controlled, the accurate temperature measurement can be achieved by adjusting the duty ratio of the PWM waveform of pet+/PET-in combination with the detected current.
Meanwhile, in order to further protect the Peltier circuit, an NTC protection function is added in the embodiment of the invention, and when the temperature is too high, heating is stopped. As shown in fig. 12, in the embodiment of the present invention, thermistors R17 and R18 are provided to detect the temperature of the peltier circuit, and when the temperature is too high, the controller 100 adjusts the peltier circuit.
As shown in fig. 12, the thermistors R17 and R18 are typically provided with a peltier circuit for measuring the temperature of the peltier circuit. One end of the thermistor R17 is connected with the driving board JP1, the other end of the thermistor R17 is grounded through a capacitor C6, and a temperature output point is arranged between the thermistor R17 and the thermistor C6 and is connected with an NTC1 pin of the controller 100. One end of the thermistor R18 is connected with the driving board JP1, the other end of the thermistor R is grounded through a capacitor C5, and a temperature output point is arranged between the thermistor R18 and the thermistor C7 and is connected with an NTC2 pin of the controller 100. The NTC1 and the NTC2 are respectively arranged on two sides of the refrigerating sheet to collect the temperature of the refrigerating sheet.
Therefore, in summary, by combining the peltier driving circuit 1000 with the first loop detecting circuit 500 and the third loop detecting circuit 700, only when the controller 100 detects that the first contact point TB1 and the third contact point P1 are in contact with the human body, the peltier driving circuit 1000 is started to heat or cool the skin, thereby avoiding useless work and saving power. Meanwhile, a temperature detection point is set at the same time, so that the temperature of the Peltier driving circuit 1000 is accurately controlled. Further, the problem of overheating of the Peltier circuit is avoided by arranging the NTC detection circuit.
Further, as shown in fig. 14A and 14B, the present invention further provides a massage function, the massage module includes a motor driving circuit 800 and a buzzer circuit, the motor driving circuit 800 and the buzzer circuit are matched with the first loop detection circuit 500 and the third loop detection circuit 700, and when the controller 100 determines that the first contact point TB1 and the third contact point P1 contact the human body, the motor driving circuit 800 and the buzzer circuit can be started.
Specifically, as shown in fig. 14A, the Motor driving circuit 800 includes an NPN type triode Q6 and a Motor DJ1, wherein a base electrode of the triode Q6 is connected with a Motor pin of the controller 100 through a current limiting resistor R12, and a collector electrode of the triode Q6 is connected with the Motor DJ1 to drive the Motor to vibrate and stop. The BUZZER 900 circuit is shown in fig. 14B, and includes an NPN triode Q7 and a BUZZER BUZ1, where a base electrode of the NPN triode Q7 is connected with a BUZZER pin of the controller 100 through a current limiting resistor R14, a collector electrode is connected with the BUZZER BUZ1, and the controller 100 outputs a 4KHz waveform to drive the BUZZER 900 to operate.
Therefore, in summary, by combining the motor driving circuit 800 and the buzzer circuit with the first detecting circuit and the third loop detecting circuit 700, only when the controller 100 detects that the first contact point TB1 and the third contact point P1 are in contact with the human body, the driving circuit and the buzzer 900 are started to massage the skin, thereby avoiding useless work and saving power.
It should be noted that unless otherwise indicated, technical or scientific terms used in the embodiments of the present invention should be given the ordinary meanings as understood by those skilled in the art to which the embodiments of the present invention belong.
In the description of the novel embodiment, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiment of the present invention and for simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiment of the present invention.
Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more unless explicitly defined otherwise.
In the description of the present embodiment, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or communicate between two elements or interact between two elements. The specific meaning of the above terms in the embodiments of the present invention will be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the novel embodiments, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit the technical solution of the present invention, and although the detailed description of the present invention is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention, and all the modifications or substitutions are included in the scope of the claims and the specification of the present invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.