An electrical stimulation massage device and a control method thereof

Abstract

This invention relates to the field of electrostimulation massage devices, specifically to an electrostimulation massage apparatus and its control method. The electrostimulation massage apparatus includes a power supply, a control unit, a boost unit, paired electrodes, a pulse modulation circuit, a first detection circuit, and a second detection circuit. The control unit obtains the impedance value between the paired electrodes based on the output voltage, the resistance value of the sampling resistor, and the sampling voltage. This invention obtains the current information of the electrostimulation pulse signal from the pulse modulation circuit through the first detection circuit, and then obtains the voltage information of the electrostimulation pulse signal through the second detection circuit, quickly and accurately obtaining the impedance value between the paired electrodes. This allows for determination of the current state of the human body or the wearing state, and then appropriate subsequent operations, such as adjusting the input voltage, to meet the user's need for painless electrostimulation massage.

Description

Technical Field

[0001] This invention relates to the field of electrical stimulation massage devices, specifically to an electrical stimulation massage device and its control method. Background Technology

[0002] An electrical pulse stimulation massage device achieves a massage effect by attaching electrode pads to the human skin and outputting electrical pulse energy.

[0003] In related technologies, the adhesion between the electrical pulse stimulation massage device and the human skin, as well as the dryness of the skin surface, can affect the adhesion effect. Different adhesion effects should be achieved by adjusting the voltage according to the user's electrical tolerance to prevent the voltage from being too high when the adhesion is poor, which may cause stinging, or to prevent the voltage from being too low when the adhesion is good, which may result in a weak massage effect.

[0004] The body's impedance value can be obtained by acquiring the electrical energy information of the pulse modulation circuit, thereby determining the fit. However, the sampling circuit in related technologies has the following problems:

[0005] 1. Using an operational amplifier to obtain power distribution information by measuring the voltage difference between the power supply and ground terminals can improve the accuracy of wearing status detection, but it has low accuracy in detecting fit and the circuit is complex.

[0006] 2. Using a fixed voltage as a reference voltage makes accurate judgment and processing impossible.

[0007] It should be noted that the above description is only for illustrating the inventive concept of this application and does not imply that the above related technologies are prior art. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an electrical stimulation massage device and its control method, in order to at least solve the problem of the complexity of detecting human body impedance values ​​in electrical stimulation massage devices, in view of the above-mentioned defects in related technologies.

[0009] The technical solution adopted by the present invention to solve its technical problem is: to provide an electrostimulation massage device, the electrostimulation massage device comprising:

[0010] Power supply and control unit;

[0011] A boost unit is connected to both the control unit and the power supply. Under the control of the control unit, the boost unit boosts the input voltage of the power supply to a preset voltage and outputs it to the outside through the voltage output terminal of the boost unit.

[0012] Electrodes, which are used to be attached to the area to be massaged;

[0013] A pulse modulation circuit, wherein the power input terminal of the pulse modulation circuit is connected to the boost unit, the first pulse transmission terminal and the second pulse transmission terminal of the pulse modulation circuit are respectively connected to an electrode, and the control terminal of the pulse modulation circuit is connected to the control unit.

[0014] A first detection circuit is connected to the voltage output terminals of the control unit and the boost unit, respectively. The control unit obtains the output voltage of the boost unit through the first detection circuit.

[0015] A second detection circuit is connected to the control unit. A sampling resistor in the second detection circuit is connected in series between the pulse modulation circuit and ground. The control unit obtains the sampling voltage of the sampling resistor through the second detection circuit.

[0016] The control unit obtains the impedance value between the paired electrodes based on the output voltage, the resistance value of the sampling resistor, and the sampling voltage.

[0017] A preferred embodiment is that the value of the sampling resistor is in the range of 130 to 170 Ω.

[0018] A preferred embodiment is that the second detection circuit further includes a first protection resistor, a first capacitor, and a first Zener diode. The control unit is connected between the pulse modulation circuit and the sampling resistor through the first protection resistor. The control unit is also connected between the sampling resistor and the ground terminal through the first capacitor and the first Zener diode, respectively. The anode of the first Zener diode is grounded.

[0019] A preferred embodiment is that the second detection circuit further includes a second protection resistor, which is connected in series between the pulse modulation circuit and the sampling resistor; the resistance ratio between the sampling resistor and the second protection resistor is in the range of 1:22 to 1:38.

[0020] A preferred embodiment is that the control unit stores a first model for calculating the impedance value between the electrodes, wherein the first model is... The R 阻抗 The V is the impedance value between paired electrodes. 采 For the sampling voltage, the R 采 The resistance value of the sampling resistor, V 输 The output voltage of the boost unit, I 调 This refers to the current output by the pulse modulation circuit.

[0021] A preferred embodiment is that the control unit stores a second model for calculating the impedance values ​​between the electrodes, wherein the second model is... The R 阻抗 The V is the impedance value between paired electrodes. 采For the sampling voltage, the R 采 The resistance value of the sampling resistor, V 输 The output voltage of the boost unit, I 调 This refers to the current output by the pulse modulation circuit.

[0022] A preferred embodiment is that the control unit stores a third model for calculating the impedance values ​​between the electrodes, wherein the third model is... The R 阻抗 The V is the impedance value between paired electrodes. 采 For the sampling voltage, the R 采 The resistance value of the sampling resistor, V 输 The output voltage of the boost unit, I 调 The current of the pulse output by the pulse modulation circuit, wherein R 余 This is the preset error margin.

[0023] A preferred embodiment is as follows: the first detection circuit includes a first voltage divider resistor and a second voltage divider resistor. The first voltage divider resistor is connected to the voltage output terminal of the boost unit and the second voltage divider resistor, respectively. The other end of the second voltage divider resistor is grounded. The control unit is connected to the connection node between the first voltage divider resistor and the second voltage divider resistor to obtain the voltage divided by the second voltage divider resistor. The control unit obtains the output voltage of the boost unit based on the voltage divided by the second voltage divider resistor, the resistance value of the first voltage divider resistor, and the resistance value of the second voltage divider resistor.

[0024] A preferred embodiment is that the control unit stores a fourth model for calculating the output voltage of the boost unit, wherein the fourth model is... The V 输 The output voltage of the boost unit, V 分2 For the voltage division of the second voltage divider resistor, R 分1 R is the resistance value of the first voltage divider resistor. 分2 This is the resistance value of the second voltage divider resistor.

[0025] A preferred embodiment is as follows: the first detection circuit includes a first voltage divider resistor and a second voltage divider resistor. The first voltage divider resistor is connected to the voltage output terminal of the boost unit and the second voltage divider resistor, respectively. The other end of the second voltage divider resistor is grounded. The control unit is connected to the connection node between the first voltage divider resistor and the second voltage divider resistor to obtain the voltage divided by the second voltage divider resistor. The control unit obtains the output voltage of the boost unit based on the voltage divided by the second voltage divider resistor, the resistance value of the first voltage divider resistor, and the resistance value of the second voltage divider resistor.

[0026] A preferred embodiment is that the control unit stores a fourth model for calculating the output voltage of the boost unit, wherein the fourth model is... The V输 The output voltage of the boost unit, V 分2 For the voltage division of the second voltage divider resistor, R 分1 R is the resistance value of the first voltage divider resistor. 分2 This is the resistance value of the second voltage divider resistor.

[0027] A preferred embodiment is that the resistance ratio of the second voltage divider resistor to the first voltage divider resistor is in the range of 1:37 to 1:72.

[0028] A preferred embodiment is that the second detection circuit further includes a second capacitor, and the control unit is connected to the connection node between the second voltage divider resistor and the ground terminal through the second capacitor.

[0029] In a preferred embodiment, the pulse modulation circuit further includes:

[0030] At least one set of control arms, each control arm including a first control switch and a second control switch, wherein the control unit is connected to the control terminals of the first control switch and the second control switch respectively to control the on / off state of the first control switch and the second control switch respectively, wherein the input terminal of the first control switch is connected to the power input terminal, the output terminal of the second control switch is connected to the ground terminal, the output terminal of the first control switch is connected to one of the first pulse transmission terminal and the second pulse transmission terminal, and the input terminal of the second control switch is connected to the other of the first pulse transmission terminal and the second pulse transmission terminal.

[0031] A preferred embodiment is that the control arm is provided with two sets, the output terminals of the two first control switches are respectively connected to the first pulse transmission terminal and the second pulse transmission terminal, and the input terminals of the two second control switches are respectively connected to the first pulse transmission terminal and the second pulse transmission terminal.

[0032] A preferred embodiment is that both the first control switch and the second control switch are transistors.

[0033] A preferred approach is that both the first pulse transmission terminal and the second pulse transmission terminal are grounded through a bidirectional variable resistor diode.

[0034] A preferred embodiment is that multiple pulse modulation circuits are provided, and each pulse modulation circuit is equipped with two electrodes.

[0035] In a preferred embodiment, the boost unit includes a power input terminal connected to the power supply, a boost circuit, an energy storage circuit, a voltage relief circuit, and a voltage output terminal connected to the pulse modulation circuit. The input terminal of the boost circuit is connected to the power input terminal, and the control terminal of the boost circuit is connected to the control unit for boosting the voltage output by the power supply. The input terminal of the energy storage circuit is connected to the output terminal of the boost circuit, and the output terminal of the energy storage circuit is connected to the power input terminal. The control terminal of the voltage relief circuit is connected to the control unit, and the input terminal of the voltage relief circuit is connected to the voltage output terminal. The control unit is used to control the boost circuit and / or the energy storage circuit to boost the voltage, and / or control the voltage relief circuit to reduce the voltage, based on a preset voltage and the impedance value between the paired electrodes, so as to control the voltage output terminal to output a preset voltage to the pulse modulation circuit.

[0036] In a preferred embodiment, the boost circuit includes an inductor and a MOSFET. One end of the inductor is connected to the input terminal of the boost circuit, and the other end is connected to the output terminal of the boost circuit. The gate of the MOSFET is connected to the control unit, the drain of the MOSFET is connected between the inductor and the output terminal of the boost circuit, and the source of the MOSFET is grounded.

[0037] A preferred embodiment is that the boost circuit further includes a third capacitor, one end of which is connected between the inductor and the input terminal of the boost circuit, and the other end is grounded.

[0038] A preferred embodiment is that the energy storage circuit is a capacitor-type energy storage circuit, which includes a fourth capacitor and a fifth capacitor connected in parallel between the input and output terminals of the energy storage circuit, with the other ends of the fourth and fifth capacitors grounded.

[0039] A preferred embodiment is as follows: the voltage relief circuit includes a first resistor, a fifth transistor, a second resistor, and a third resistor. The first resistor is connected in series between the control terminal of the voltage relief circuit and the base of the fifth transistor, and the emitter of the fifth transistor is grounded. One end of the third resistor is connected between the first resistor and the base of the fifth transistor, and the other end is grounded. The second resistor is connected in series between the input terminal of the voltage relief circuit and the collector of the fifth transistor.

[0040] The technical solution adopted by the present invention to solve its technical problem is: to provide a control method, characterized in that the control method is applied in the electrostimulation massage device, and the steps of the control method include:

[0041] The control unit controls the pulse modulation circuit to generate electrical stimulation pulse signals;

[0042] The electrical stimulation pulse signals are sequentially and cyclically controlled to output each pair of electrodes, and the impedance values ​​between the corresponding pairs of electrodes are obtained.

[0043] When the impedance value is abnormal, the next cycle stops controlling the output of the electrical stimulation pulse signal of the paired electrodes corresponding to the abnormal impedance value.

[0044] In a preferred embodiment, the control method further includes the following steps:

[0045] Record the impedance value of each electrical stimulation circuit;

[0046] The user is notified when the impedance value of an electrical stimulation circuit is abnormal.

[0047] A preferred approach is to set an amplitude threshold or a safe value range, and the steps for determining abnormal impedance values ​​include:

[0048] When the recorded impedance value is outside the safe range, the corresponding electrical stimulation circuit is determined to be abnormal.

[0049] Alternatively, if the amplitude of any two impedance values ​​exceeds the amplitude threshold, at least one corresponding electrical stimulation circuit is determined to be abnormal.

[0050] The beneficial effects of this invention are as follows: Compared with related technologies, this invention obtains the current information of the electrical stimulation pulse signal of the pulse modulation circuit through the first detection circuit, and then obtains the voltage information of the electrical stimulation pulse signal through the second detection circuit. It quickly and accurately obtains the impedance value between the paired electrodes, thereby determining the current state of the human body or the wearing state, and then adapting to the next step of operation, such as adjusting the input voltage, to meet the user's need for painless electrical stimulation massage. At the same time, the judgment is made through two-way sampling, which is accurate and the circuit is simple. It efficiently and accurately obtains the current entering the human body and dynamically obtains the input voltage, improving the accuracy of abnormal monitoring and effectively reducing complexity and cost. Attached Figure Description

[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0052] Figure 1 This is a circuit diagram of the electrical stimulation massage device of the present invention;

[0053] Figure 2 This is a circuit diagram of the pulse modulation circuit of the present invention;

[0054] Figure 3 This is a circuit diagram of the second detection circuit of the present invention;

[0055] Figure 4 This is a schematic diagram of the circuit structure of the first detection circuit of the present invention;

[0056] Figure 5 This is a circuit diagram of the pulse modulation circuit of the present invention;

[0057] Figure 6 This is a circuit diagram of the pulse modulation circuit of the present invention;

[0058] Figure 7 This is a circuit schematic diagram of the boost unit of the present invention;

[0059] Figure 8 This is a circuit diagram of the boost unit of the present invention;

[0060] Figure 9 This is a flowchart of the control method of the present invention;

[0061] Figure 10 This is a flowchart of the control method for notifying users according to the present invention. Detailed Implementation

[0062] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0063] like Figures 1 to 8 As shown, the present invention provides a preferred embodiment of an electrostimulation massage device.

[0064] The electrostimulation massage device includes a power supply 100, a control unit 600, a boost unit 200, paired electrodes, a pulse modulation circuit 300, a first detection circuit 400, and a second detection circuit 500. The boost unit 200 is connected to both the control unit 600 and the power supply 100. Under the control of the control unit 600, the boost unit 200 boosts the input voltage of the power supply 100 to a preset voltage and outputs it through its voltage output terminal. The electrodes are used to attach to the area to be massaged. The power input terminal 311 of the pulse modulation circuit 300 is connected to the voltage output terminal of the boost unit 200. The first pulse transmission terminal and the second pulse transmission terminal of the pulse modulation circuit 300 are respectively connected to the power supply 100 and the second detection circuit 500. The control terminal of the pulse modulation circuit 300 is connected to the control unit 600. The first detection circuit 400 is connected to the voltage output terminals of the control unit 600 and the boost unit 200 respectively. The control unit 600 obtains the output voltage of the boost unit 200 through the first detection circuit 400. The second detection circuit 500 is connected to the control unit 600. The sampling resistor R1 of the second detection circuit 500 is connected in series between the pulse modulation circuit 300 and the ground terminal. The control unit 600 obtains the sampling voltage of the sampling resistor R1 through the second detection circuit 500. The control unit 600 obtains the impedance value between the paired electrodes based on the output voltage, the resistance value of the sampling resistor R1 and the sampling voltage.

[0065] Specifically, the boost unit 200 is provided with a power input terminal, a voltage output terminal and a control terminal, the pulse modulation circuit 300 is provided with a control terminal, a power input terminal 311, a ground terminal 312, a first pulse transmission terminal and a second pulse transmission terminal, the first detection circuit 400 includes a transmission terminal 420 and a detection terminal 410, the second detection circuit 500 also includes a transmission terminal 520 and a detection terminal 510, and the paired electrodes include a first electrode 301 and a second electrode 302.

[0066] In one embodiment, the boost unit 200 is connected to the power supply 100 via a power input terminal, and the power supply 100 supplies power to the boost unit 200. The boost unit 200 is also connected to the power input terminal 311 of the pulse modulation circuit 300 via a voltage output terminal, boosting the input voltage of the power supply 100 to a preset voltage and transmitting it to the pulse modulation circuit 300 as the voltage value of the electrical stimulation pulse signal. The boost unit 200 is also connected to the control unit 600 via a control terminal, and performs a boost operation under the control of the control unit 600 to boost the input voltage of the power supply 100 to the preset voltage.

[0067] In one embodiment, the pulse modulation circuit 300 is first connected to the first electrode 301 and the second electrode 302 via a first pulse transmission terminal and a second pulse transmission terminal, respectively. The pulse modulation circuit 300 is also grounded via a ground terminal 312, forming a current loop, equivalent to being connected to the negative terminal of the power supply 100. The control terminal of the pulse modulation circuit 300 is connected to the control unit 600. Under the control of the control unit 600, the electrical energy provided by the boost unit 200 generates a pulse signal, i.e., an electrical stimulation pulse signal. When the first electrode 301 and the second electrode 302 are conducting, the first pulse transmission terminal outputs the electrical stimulation pulse signal through the first electrode 301, and the second pulse transmission terminal receives the electrical stimulation pulse signal through the second electrode 302, and then outputs it through the ground terminal 312, forming a pulse cycle. At this time, the first electrode 301 and the second electrode 302 are attached to the area to be massaged, realizing electrical conduction between them. The electrical stimulation pulse signal is input to the area to be massaged through the electrodes, allowing the user to experience electrical stimulation and forming a massage sensation.

[0068] In one embodiment, both the first detection circuit 400 and the second detection circuit 500 are connected to the control unit 600 through their own transmission terminals. The first detection circuit 400 is connected to the voltage output terminal of the boost unit 200 through its detection terminal, and the second detection circuit 500 is connected in parallel to the sampling resistor R1 through its detection terminal 510. In order to reduce or even prevent excessive current from the electrical stimulation pulse signal from causing stinging at the massage site, and to allow the user to perform the entire electrical stimulation massage process without stinging, the control unit 600 first obtains the voltage value at the voltage output terminal of the boost unit 200 through the first detection circuit 400, that is, the specific voltage value after the input voltage of the power supply 100 is boosted, so as to determine whether the preset voltage has reached the expected value. Then, the control unit 600 obtains the sampling voltage on the sampling resistor R1 through the second detection circuit 500. Finally, the control unit 600 obtains the output voltage of the boost unit 200 and the sampling voltage of the sampling resistor R1, and stores the resistance value of the sampling resistor R1. According to a preset algorithm, based on the output voltage, the resistance value of the sampling resistor R1, and the sampling voltage, it obtains the impedance value between the paired electrodes. That is, it obtains the current flowing through the sampling resistor R1 by using the resistance value of the sampling resistor R1 and the sampling voltage, and thus obtains the current value of the electrical stimulation pulse signal of the pulse modulation circuit 300. It obtains the voltage value of the electrical stimulation pulse signal of the pulse modulation circuit 300 by using the output voltage, and then obtains the current value of the electrical stimulation pulse signal based on the current value of the electrical stimulation pulse signal and the voltage value of the sampling resistor R1. The total resistance value corresponding to the pulse modulation circuit 300 is obtained by obtaining the voltage value. The total resistance value is used as the impedance value between the paired electrodes. Alternatively, the impedance value between the paired electrodes can be obtained by subtracting the resistance value of the sampling resistor R1 from the total resistance value. Or, the impedance value between the paired electrodes can be obtained by subtracting the resistance value of the sampling resistor R1 from the total resistance value and then subtracting a preset error margin. The preset error margin can be the internal resistance generated by the wires or components of the pulse modulation circuit 300, the internal resistance generated by the electrode itself due to its material or shape, or the internal resistance generated at other different locations.

[0069] Furthermore, the control unit 600 acquires the impedance value of the area to be massaged in real time through the above operations, and adjusts the output voltage of the boost unit 200 in a purposeful manner according to the impedance value, thereby adjusting the current of the electrical stimulation pulse signal of the pulse modulation circuit 300, so that the area to be massaged can maintain the current value of the electrical stimulation pulse signal consistently and controllably during the massage process, avoiding strong electrical stimulation to the area to be massaged, and achieving painless massage.

[0070] In one embodiment, the control unit 600 preferably includes a microcontroller unit (MCU) and peripheral circuitry. A microcontroller unit (MCU), also known as a single-chip microcomputer, is a central processing unit (CPU) with its frequency and specifications appropriately reduced. It integrates memory, timer, USB, A / D converter, UART, PLC, DMA, and even LCD driver circuitry onto a single chip, forming a chip-level computer for different application combinations. The MCU's pins are connected to various functional modules, such as the boost unit 200, pulse modulation circuit 300, first detection circuit 400, and second detection circuit 500, to control and detect electrical pulses. Of course, any commercially available MCU can be used, and the performance requirements for the microcontroller are not high.

[0071] like Figure 3 As shown, the present invention provides a preferred embodiment of the second detection circuit 500.

[0072] The second detection circuit 500 also includes a first protective resistor R3, a first capacitor C1, and a first Zener diode D1. The control unit 600 is connected between the pulse modulation circuit 300 and the sampling resistor R1 through the first protective resistor R3. The control unit 600 is also connected between the sampling resistor R1 and ground through the first capacitor C1 and the first Zener diode D1, respectively. The anode of the first Zener diode D1 is grounded. Specifically, the two ends of the sampling resistor R1 are connected to the ground terminal 312 and the ground terminal of the pulse modulation circuit 300, respectively. The electrical energy output from the pulse modulation circuit 300 flows through the sampling resistor R1, and the voltage of the sampling resistor R1 is obtained by the control unit 600. By setting the first protective resistor R3 and connecting the control unit 600 and the sampling resistor R1, excessive voltage input to the control unit 600 is prevented, and voltage division is performed to effectively protect the control unit 600. By setting the first capacitor C1, the sampling signal is filtered to improve the accuracy of the sampling data. By setting the first Zener diode D1, preferably a Zener diode, voltage regulation is achieved.

[0073] Specifically, the sampling resistor R1 should range from 130 to 170 Ω. On one hand, a larger resistance in R1 facilitates the control unit 600 in identifying the sampling voltage, reducing the need for amplifier settings. On the other hand, since the electrodes act on the human body, and the typical human body impedance is 300 to 1500 Ω, the wearing of the electrical stimulation massage device may cause the human body impedance to increase or decrease, even falling below 300 Ω. Therefore, the sampling resistor R1 should not be too large. Furthermore, a large resistance in R1 can easily lead to energy loss and weaken the electrical stimulation effect of the electrical stimulation pulse signal. The sampling resistor R1 is preferably 150 Ω with an error of 1% to improve detection accuracy. The first protection resistor R3 is preferably 1KΩ with an error of 5%, although other values ​​are also possible. The high resistance of the first protection resistor R3 enables control and protection for the control unit 600. However, the specific value depends on the control unit 600, especially the selection of the chip used in the control unit 600, which is determined by the voltage across the chip's pins. The first capacitor C1 is used for filtering. Since it's a small capacitor for filtering, a 104 capacitor is preferred. For capacitor-to-ground filtering, a smaller capacitor in parallel with ground is sufficient. The voltage value won't be too high, so 50V is preferred. A 10% tolerance is used for filtering to save costs. The first Zener diode D1 is preferably a BZT52C3V3S 3.3V Zener diode, but other Zener diodes can also be used. It's connected in series with the first protection resistor R3. This series connection provides a higher stable voltage and protects the electronic components in the circuit from high current breakdown.

[0074] In one embodiment, an algorithmic model is provided to calculate the impedance value between three electrodes.

[0075] Option 1: The control unit 600 stores a first model for calculating the impedance value between electrodes. The first model is... The R 阻抗 The V is the impedance value between paired electrodes. 采 For the sampling voltage, the R 采 The resistance value of the sampling resistor R1, the V 输 The output voltage of the boost unit 200, the I 调 This is the current output by the pulse modulation circuit 300. First, through V... 采 and R 采 Obtain the current flowing through the sampling resistor R1, which is the current I of the output pulse of the pulse modulation circuit 300. 调 By obtaining the output voltage V of the boost unit 200 输 via V 输 and I 调Obtain the resistance value of the pulse modulation circuit 300. The pulse output of the pulse modulation circuit 300 is the electrical stimulation pulse signal, and the resistance value of the pulse modulation circuit 300 is the impedance value of the part to be massaged where the paired electrodes are attached.

[0076] Option 2: The control unit 600 stores a second model for calculating the impedance value between the electrodes. The second model is... The R 阻抗 The V is the impedance value between paired electrodes. 采 For the sampling voltage, the R 采 The resistance value of the sampling resistor R1, the V 输 The output voltage of the boost unit 200, the I 调 This refers to the current of the pulse output by the pulse modulation circuit 300. Compared to Scheme 1, the resistance of the pulse modulation circuit 300 is not only determined by the impedance of the area to be massaged, where the paired electrodes are attached, but also includes the resistance value R of the sampling resistor R1. 采 The main reason is that the sampling resistor R1 of this invention has a relatively large value, and the difference between it and the impedance value of the part to be massaged is not very large and cannot be ignored. In order to improve accuracy, the sampling resistor R1 of this invention has a relatively large value.

[0077] Option 3: The control unit 600 stores a third model for calculating the impedance value between the electrodes. The third model is... The R 阻抗 The V is the impedance value between paired electrodes. 采 For the sampling voltage, the R 采 The resistance value of the sampling resistor R1, the V 输 The output voltage of the boost unit 200, the I 调 The current of the pulse output by the pulse modulation circuit 300, wherein R 余 This is a preset error margin. Compared to Scheme 2, a preset error margin has been added. The preset error margin can be the internal resistance generated by the wires or components of the pulse modulation circuit 300, the internal resistance generated by the electrode due to its own material or shape, or the internal resistance generated at other different locations. The preset error margin can be calculated experimentally or theoretically to further improve accuracy.

[0078] In one embodiment, the second detection circuit 500 further includes a second protection resistor R2, which is connected in series between the pulse modulation circuit 300 and the sampling resistor R1. By setting the second protection resistor R2, the amount of electrical energy flowing into the control unit 600 is reduced, or voltage division is performed to reduce the voltage value input to the control unit 600, thereby protecting the entire second detection circuit 500. Therefore, the second protection resistor R2 is preferably 5.1Ω, although a value close to this is also acceptable, and the accuracy should be within 1%.

[0079] Since the sampling resistor R1 has a value range of 130 to 170 Ω, and the second protection resistor R2 can also have a value between 4.5 and 5.7 Ω, the resistance ratio of the sampling resistor R1 to the second protection resistor R2 ranges from 1:22 to 1:38. Of course, the range of the resistance ratio of the sampling resistor R1 to the second protection resistor R2 is not limited by their specific resistance values; only the resistance ratio of the two needs to be considered.

[0080] like Figure 4 As shown, the present invention provides a preferred embodiment of the first detection circuit 400.

[0081] The first detection circuit 400 includes a first voltage divider resistor R4 and a second voltage divider resistor R5. The first voltage divider resistor R4 is connected to the voltage output terminal of the boost unit 200 and the second voltage divider resistor R5, respectively. The other end of the second voltage divider resistor R5 is grounded. The control unit 600 is connected to the connection node between the first voltage divider resistor R4 and the second voltage divider resistor R5 to obtain the voltage divided by the second voltage divider resistor R5. The control unit 600 obtains the output voltage of the boost unit 200 based on the voltage divided by the second voltage divider resistor R5, the resistance value of the first voltage divider resistor R4, and the resistance value of the second voltage divider resistor R5.

[0082] Specifically, by utilizing the voltage division of the first voltage divider resistor R4 and the second voltage divider resistor R5, the output voltage of the boost unit 200 is obtained by the first voltage divider resistor R4 and the second voltage divider resistor R5. Then, by reducing the value of the second voltage divider resistor R5, the main control unit can directly obtain the voltage of the second voltage divider resistor R5 without the need for additional components for protection or current shunting. The first voltage divider resistor R4 should be much larger than the resistance value of the second voltage divider resistor R5. By reducing the voltage value of the second voltage divider resistor R5, and by knowing the resistance values ​​of the first voltage divider resistor R4 and the second voltage divider resistor R5, the control unit 600 can directly obtain the output voltage of the boost unit 200. The values ​​of the first voltage divider resistor R4 and the second voltage divider resistor R5 need to be selected considering both the range of the output voltage of the boost unit 200 and the voltage limits of the control unit 600. The resistance ratio of the second voltage divider resistor R5 to the first voltage divider resistor R4 is between 1:37 and 1:72. The resistance of the second voltage divider resistor R5 is preferably 10kΩ, and its value can be between 9kΩ and 11kΩ. The resistance of the first voltage divider resistor R4 is preferably 510kΩ, and its value can be between 450kΩ and 570kΩ.

[0083] In one embodiment, an algorithm is provided for calculating the output voltage of the boost unit 200.

[0084] The control unit 600 stores a fourth model for calculating the output voltage of the boost unit 200, the fourth model being... The V 输 The output voltage of the boost unit 200, V 分2 For the voltage division of the second voltage divider resistor R5, the R 分1 The resistance value of the first voltage divider resistor R4 is given by R. 分2 The value of the second voltage divider resistor R5 is given.

[0085] The core idea is to obtain the voltage value of the first voltage divider resistor R4 and the output voltage of the boost unit 200 based on the resistance ratio of the first voltage divider resistor R4 and the second voltage divider resistor R5, and based on the sampling voltage of the second voltage divider resistor R5.

[0086] In one embodiment, the second detection circuit 500 further includes a second capacitor, and the control unit 600 is connected to the connection node between the second voltage divider resistor R5 and the ground terminal through the second capacitor. The second capacitor is used for filtering. For capacitance selection, since it is a small capacitor for filtering, a 103 capacitor is preferred. Furthermore, for capacitor-to-ground filtering, a small capacitor connected in parallel to ground is sufficient, and the voltage value will not be too high, so 50V is preferred. For filtering purposes, a 10% error value is used to save costs.

[0087] like Figure 5 and Figure 6As shown, the present invention provides a preferred embodiment of a pulse modulation circuit 300.

[0088] The pulse modulation circuit 300 also includes at least one set of control arms, each control arm including a first control switch 321 and a second control switch 324. The control unit 600 is connected to the control terminals of the first control switch 321 and the second control switch 324 respectively to control the on / off state of the first control switch 321 and the second control switch 324 respectively. The input terminal of the first control switch 321 is connected to the power input terminal 311, and the output terminal of the second control switch 324 is connected to the ground terminal. The output terminal of the first control switch 321 is connected to one of the first pulse transmission terminal and the second pulse transmission terminal, and the input terminal of the second control switch 324 is connected to the other of the first pulse transmission terminal and the second pulse transmission terminal.

[0089] Specifically, when the boost circuit has a stable input voltage value and both electrodes are attached to the area to be massaged, the control unit 600 controls the on / off state of the first control switch 321 and the second control switch 324 to generate a pulse signal, i.e., an electrical stimulation pulse signal. The electrical energy input from the boost circuit passes sequentially through the first control switch 321, the first electrode 301, the area to be massaged, the second electrode 302, and the second control switch 324 before being output. This energy then flows through the sampling resistor R1 of the second detection circuit 500, stimulating the area to be massaged with the pulse current, allowing the area to experience a massage sensation. By adjusting the input voltage, the current passing through the area to be massaged can be adjusted to achieve different massage intensities. Combined with different pulse frequencies, different massage techniques can be achieved. The control unit 600 is connected to the first control switch 321 via control terminal 331 and to the second control switch 324 via control terminal 334.

[0090] In one embodiment, two sets of control arms are provided. The output terminals of two first control switches (321, 322) are respectively connected to the first pulse transmission terminal and the second pulse transmission terminal, and the input terminals of two second control switches (323, 324) are respectively connected to the first pulse transmission terminal and the second pulse transmission terminal. An H-bridge circuit is formed by the four control switches to realize the rapid control of the interactive switching of the two sets of control arms. The control unit 600 is connected to the first control switch 322 through control terminal 332 and to the second control switch 323 through control terminal 333.

[0091] In one embodiment, the first control switch (321, 322) and the second control switch (323, 324) are both transistors. Taking an H-bridge circuit as an example, removing two of the transistors creates a control arm. The circuit includes a first transistor Q1, a second transistor Q2, a third transistor Q3, and a fourth transistor Q4. The first transistor Q1 and the second transistor Q2 serve as the first control switches (321, 322), and the third transistor Q3 and the fourth transistor Q4 serve as the second control switches (323, 324). The emitters of both the first transistor Q1 and the second transistor Q2 are connected to the input terminal of the boost unit 200, serving as the power input terminal 311 of the pulse modulation circuit 300. The bases of both the first transistor Q1 and the second transistor Q2 are connected to the control terminal of the control unit 600. The collectors of both the first transistor Q1 and the second transistor Q2... The emitters of the third transistor Q3 and the fourth transistor Q4 are connected to the two electrodes respectively. The collectors of the third transistor Q3 and the fourth transistor Q4 are connected to the ground terminal 312 of the pulse modulation circuit 300. The bases of the third transistor Q3 and the fourth transistor Q4 are both connected to the control terminal of the control unit 600. The control unit 600 can control the on / off state of the first transistor Q1, the second transistor Q2, the third transistor Q3 and the fourth transistor Q4 respectively. Preferably, it controls the on / off state of the first transistor Q1 and the fourth transistor Q4 simultaneously, and controls the on / off state of the second transistor Q2 and the third transistor Q3 simultaneously.

[0092] More specifically, the input terminal of the boost unit 200 is connected to the control unit 600 through a pull-up resistor, providing the voltage to drive the transistors to turn on and off. A resistor is connected in series with the base of each transistor to protect the control unit 600 and generate a drive voltage at the base to turn on the transistors. Both the first pulse transmission terminal and the second pulse transmission terminal are grounded through a bidirectional variable resistor diode (D2, D3), achieving bidirectional blocking between the motor and ground, facilitating current return to ground. Specifically, the power input terminal 311 of the pulse modulation circuit 300 is connected to the control unit 600 through resistor R10 and control terminal 331, through resistor R11 and control terminal 332, through resistor R12 and control terminal 333, and through resistor R13 and control terminal 334; and a resistor R6 is connected in series between control terminal 331 and the base of the first transistor Q1, a resistor R7 is connected in series between control terminal 332 and the base of the second transistor Q2, a resistor R8 is connected in series between control terminal 333 and the base of the third transistor Q3, and a resistor R9 is connected in series between control terminal 334 and the base of the fourth transistor Q4.

[0093] like Figure 7 and Figure 8 As shown, the present invention provides a preferred embodiment of a boost unit 200.

[0094] The boost unit 200 includes a power input terminal connected to the power supply 100, a boost circuit 210, an energy storage circuit 220, a voltage relief circuit 230, and a voltage output terminal 201 connected to the pulse modulation circuit 300. The input terminal of the boost circuit 210 is connected to the power input terminal, and the control terminal of the boost circuit 210 is connected to the control unit 600. The input terminal of the energy storage circuit 220 is connected to the output terminal of the boost circuit 210, and the output terminal of the energy storage circuit 220 is connected to the voltage output terminal 201. The control terminal of the voltage relief circuit 230 is connected to the control unit 600, and the input terminal of the voltage relief circuit 230 is connected to the voltage output terminal 201. The control unit 600 is used to control the boost circuit 210 and / or the energy storage circuit 220 to boost voltage, and / or control the voltage relief circuit 230 to reduce voltage, according to a preset voltage and the impedance value between the paired electrodes, so as to control the voltage output terminal 201 to output a preset voltage to the pulse modulation circuit 300.

[0095] Specifically, the input terminal of the boost circuit 210 is connected to the power input terminal to obtain the voltage of the power supply 100, and the control terminal of the boost circuit 210 is connected to the control unit 600 to receive control commands and boost the voltage of the power supply 100; the input terminal of the energy storage circuit 220 is connected to the output terminal of the boost circuit 210 to store energy in the boosted voltage, and the output terminal of the energy storage circuit 220 is connected to the voltage output terminal 201 to output a preset voltage to the voltage output terminal 201; the control terminal of the pressure relief circuit 230 is connected to the control unit 600, and the input terminal of the pressure relief circuit 230 is connected to the voltage output terminal 201 to reduce the output voltage of the boost circuit 210 to the voltage output terminal 201 according to the control commands.

[0096] When the impedance between the paired electrodes increases, the control unit 600 controls the pressure relief circuit 230 to reduce the voltage output by the voltage output terminal 201. When the impedance decreases, the control unit 600 controls the boost circuit 210 to boost the voltage output by the power supply 100, so as to dynamically maintain the output power of the voltage output terminal 201 unchanged.

[0097] In one embodiment, the boost circuit 210 includes an inductor L and a MOSFET. One end of the inductor L is connected to the input terminal of the boost circuit 210, and the other end is connected to the output terminal of the boost circuit 210. The gate of the MOSFET is connected to the control terminal of the boost circuit 210, the drain of the MOSFET is connected between the inductor L and the output terminal of the boost circuit 210, and the source of the MOSFET is grounded. The MOSFET primarily functions as a current switching switch. After its gate is connected to the control terminal of the boost circuit 210, it can receive control commands from the control unit 600 and turn on or off according to these commands. When the MOSFET is on, the current in the inductor L flows through the MOSFET to ground, allowing the power supply 100 to charge the inductor L. When the MOSFET is off, the current in the inductor L flows to the energy storage circuit 220, boosting the voltage output by the power supply 100. A capacitor C3 is connected between the power supply 100 and the inductor L and grounded for filtering.

[0098] A resistor R14 is connected in series between the gate of the MOSFET and the control terminal of the boost circuit 210 to protect the control unit 600. A resistor R15 is also connected to the gate of the MOSFET and grounded to ground the control unit 600 under no-load conditions and prevent the MOSFET from turning on.

[0099] In one embodiment, the boost unit 200 further includes a diode D4 connected in series between the output terminal of the boost circuit 210 and the input terminal of the energy storage circuit 220; and / or, the energy storage circuit 220 is a capacitor-type energy storage circuit 220. When the MOSFET of the boost circuit 210 is turned off, the current of the circuit PL1 flows through the diode D4 to the energy storage circuit 220, causing the voltage output by the energy storage circuit 220 to the voltage output terminal 201 to be the sum of the voltage output by the inductor L and the energy storage voltage of the energy storage circuit 220, thereby achieving voltage boost.

[0100] The energy storage circuit 220 is a capacitor-type energy storage circuit. It includes a fourth capacitor C4 and a fifth capacitor C5 connected in parallel between the input and output terminals. The other ends of both capacitors are grounded. The fourth and fifth capacitors are primarily used for energy storage. The voltage output from the energy storage circuit 220 to the voltage output terminal 201 is the sum of the voltage output from the inductor L, the voltage of the fourth capacitor C4, and the voltage of the fifth capacitor C5, thus achieving voltage boosting. The energy storage capacity of the fourth capacitor C4 is greater than that of the fifth capacitor C5.

[0101] In one embodiment, the voltage relief circuit 230 includes a first resistor R16, a fifth transistor Q5, a second resistor R17, and a third resistor R18. The first resistor R16 is connected in series between the control terminal of the voltage relief circuit 230 and the base of the fifth transistor Q5, with the emitter of the fifth transistor Q5 grounded. One end of the third resistor R18 is connected between the first resistor R16 and the base of the fifth transistor Q5, and the other end is grounded. The second resistor R17 is connected in series between the input terminal of the voltage relief circuit 230 and the collector of the fifth transistor Q5. Specifically, when the output voltage of the energy storage circuit 220 to the voltage output terminal 201 is higher than a preset voltage, the control unit 600 controls the transistor to conduct, and the voltage relief circuit 230 relieves the voltage of the inductor L and the energy storage circuit 220, so that the output voltage of the energy storage circuit 220 to the voltage output terminal 201 is reduced to the preset voltage, and the preset voltage is output to the pulse modulation circuit 300 through the voltage output terminal 201.

[0102] like Figure 9 and Figure 10 As shown, the present invention provides a preferred embodiment of a control method.

[0103] A control method, applied in an electrical stimulation massage device, the steps of the control method include:

[0104] Step S10: The control unit 600 controls the pulse modulation circuit 300 to generate an electrical stimulation pulse signal;

[0105] Step S20: Sequentially control the output of electrical stimulation pulse signals of each pair of electrodes in a cyclic manner, and obtain the impedance values ​​between the corresponding pairs of electrodes;

[0106] Step S30: When the impedance value is abnormal, the next cycle stops controlling the output of the electrical stimulation pulse signal of the paired electrodes corresponding to the abnormal impedance value.

[0107] Specifically, the control unit 600 controls the pulse modulation circuit 300 to generate electrical stimulation pulse signals for electrical stimulation massage of the area to be massaged. According to different massage modes, the paired electrodes are controlled to perform preset massage methods. For example, each pair of electrodes may output electrical stimulation pulse signals in turn, or at least two pairs of electrodes may output electrical stimulation pulse signals sequentially within a certain time period. In step S20, the sequential cyclic control of the paired electrodes to output electrical stimulation pulse signals is based on a preset mode. "Sequential" means following a preset order, not that the paired electrodes output signals one by one in sequence. Of course, the paired electrodes can also output signals one by one in sequence. Here, "paired electrodes" does not only refer to the two electrodes of a single pulse modulation circuit 300, but can also be one electrode of one pulse modulation circuit 300 and one electrode of another matching pulse modulation circuit 300. Finally, the impedance value between the paired electrodes is obtained through the above-mentioned electrical stimulation massage device, that is, the impedance value corresponding to each output electrical stimulation pulse signal.

[0108] Normally, because the contact areas are close, the output voltage is consistent, and the shape and material of the electrodes are also similar, theoretically, the impedance values ​​should be close or consistent. However, impedance values ​​may become abnormal due to wearing issues or internal circuit problems, meaning a pair of electrodes is malfunctioning and unable to output electrical stimulation pulse signals normally. If electrical stimulation pulse signals are continued to be output, it can easily cause stinging pain in the area to be massaged. Therefore, when an impedance value is abnormal, the next cycle will stop controlling the pair of electrodes corresponding to the abnormal impedance value to output electrical stimulation pulse signals.

[0109] Here, the next cycle refers to the process where, before the two electrodes corresponding to the abnormal impedance value are simultaneously connected, the control unit 600 controls the pulse modulation circuit 300 to disconnect the current loop, preventing it from participating in the next output of the electrical stimulation pulse signal.

[0110] In one embodiment, reference Figure 10 The control method also includes the following steps:

[0111] Step S31: Record the impedance value of each electrical stimulation circuit;

[0112] Step S32: When the impedance value of an electrical stimulation circuit is abnormal, notify the user.

[0113] The impedance values ​​between the paired electrodes obtained in step S20 are recorded, that is, the impedance value of each electrical stimulation circuit is recorded. When the impedance value of an electrical stimulation circuit is abnormal, that is, the paired electrodes are abnormal, after executing the next cycle to stop the output of electrical stimulation pulse signals of the paired electrodes corresponding to the abnormal impedance value, it is also necessary to notify the user so that the user can decide whether to turn off the power supply 100 or reduce the output voltage, or even remind the user to wear the electrical stimulation massage device again.

[0114] The above description is merely the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the claims of the present invention are covered by the present invention.

Claims

1. An electrical stimulation massage device, characterized by, The electric stimulation massage device comprises: a power supply and a control unit; a voltage boosting unit connected with the control unit and the power supply, respectively, which boosts the input voltage of the power supply to a preset voltage under the control of the control unit and outputs the voltage to the outside through a voltage output end of the voltage boosting unit; an electrode for attaching to a part to be massaged; a pulse modulation circuit, an electric energy input end of which is connected with the voltage output end of the voltage boosting unit, a first pulse transmission end and a second pulse transmission end of which are connected with an electrode, respectively, and a control end of which is connected with the control unit; a first detection circuit connected with the control unit and the voltage output end of the voltage boosting unit, respectively, through which the control unit acquires the output voltage of the voltage boosting unit; a second detection circuit connected with the control unit, a sampling resistor of which is connected in series between the pulse modulation circuit and a ground end, and through which the control unit acquires a sampling voltage of the sampling resistor; wherein the control unit acquires an impedance value between a pair of electrodes according to the output voltage, the resistance value of the sampling resistor and the sampling voltage; wherein the pulse modulation circuit comprises at least one control arm, the control arm comprises a first control switch and a second control switch, the control unit is connected with control ends of the first control switch and the second control switch, respectively, to control the on-off of the first control switch and the second control switch, respectively, an input end of the first control switch is connected with the electric energy input end, an output end of the second control switch is connected with the ground end, an output end of the first control switch is connected with one of the first pulse transmission end and the second pulse transmission end, and an input end of the second control switch is connected with the other of the first pulse transmission end and the second pulse transmission end.

2. The electrical stimulation massage device of claim 1, wherein, The sampling resistor has a value range of 130 to 170Ω.

3. The electrical stimulation massage device of claim 1, wherein: The second detection circuit further comprises a first protection resistor, a first capacitor and a first voltage stabilizing diode, the control unit is connected with the pulse modulation circuit and the sampling resistor through the first protection resistor, the control unit is further connected with the sampling resistor and the ground end through the first capacitor and the first voltage stabilizing diode, respectively, and an anode of the first voltage stabilizing diode is grounded.

4. The electrical stimulation massage device according to claim 1 or 2, characterized in that: The second detection circuit further comprises a second protection resistor connected in series between the pulse modulation circuit and the sampling resistor; and the sampling resistor and the second protection resistor have a resistance ratio range of 1:22 to 1:

38.

5. The electrical stimulation massage device of claim 1, wherein: The control unit stores a first model for calculating an impedance value between electrodes, the first model being The R 阻抗 is an impedance value between electrodes arranged in pairs, the V 采 is a sampling voltage, the R 采 is a resistance value of a sampling resistor, the V 输 is an output voltage of a voltage boosting unit, the I 调 is a current of a pulse output by a pulse modulation circuit.

6. The electrical stimulation massage device of claim 1 or 2, wherein: The control unit stores a second model for calculating an impedance value between electrodes, the second model being The R 阻抗 is an impedance value between electrodes arranged in pairs, the V 采 is a sampling voltage, the R 采 is a resistance value of a sampling resistor, the V 输 is an output voltage of a voltage boosting unit, the I 调 is a current of a pulse output by a pulse modulation circuit.

7. The electrical stimulation massage device according to claim 1 or 2, wherein: The control unit stores a third model for calculating impedance values between electrodes, the third model being The R 阻抗 is an impedance value between electrodes arranged in pairs, the V 采 is a sampling voltage, the R 采 is a resistance value of a sampling resistor, the V 输 is an output voltage of a voltage boosting unit, the I 调 is a current of a pulse output by a pulse modulation circuit, the R 余 is a preset error margin.

8. The electrical stimulation massage device of claim 1, wherein: The first detection circuit comprises a first voltage dividing resistor and a second voltage dividing resistor, the first voltage dividing resistor is connected with the voltage output end of the voltage boosting unit and the second voltage dividing resistor, respectively, the other end of the second voltage dividing resistor is grounded, the control unit is connected with a connection node between the first voltage dividing resistor and the second voltage dividing resistor to acquire a voltage division of the second voltage dividing resistor, and the control unit acquires the output voltage of the voltage boosting unit according to the voltage division of the second voltage dividing resistor, the resistance value of the first voltage dividing resistor and the resistance value of the second voltage dividing resistor.

9. The electrical stimulation massage device of claim 8, wherein: The control unit stores a fourth model that calculates an output voltage of the voltage boosting unit, the fourth model being The V 输 is an output voltage of the voltage boosting unit, the V 分2 is a voltage division of the second voltage dividing resistor, the R 分1 is a resistance value of the first voltage dividing resistor, the R 分2 is a resistance value of the second voltage dividing resistor.

10. The electrical stimulation massage device according to claim 8 or 9, characterized in that: The second voltage dividing resistor and the first voltage dividing resistor have a resistance ratio range of 1:37 to 1:

72.

11. The electrical stimulation massage device of claim 8, wherein: The second detection circuit further comprises a second capacitor, and the control unit is connected to a connection node between the second voltage dividing resistor and a ground terminal through the second capacitor.

12. The electrical stimulation massage device of claim 1, wherein: The control arm is provided with two groups, the outputs of the two first control switches are connected to the first pulse transmission end and the second pulse transmission end respectively, and the inputs of the two second control switches are connected to the first pulse transmission end and the second pulse transmission end respectively.

13. The electrical stimulation massage device of claim 1 or 12, wherein: The first control switch and the second control switch are both triodes.

14. The electrical stimulation massage device of claim 1 or 12, wherein: The first pulse transmission end and the second pulse transmission end are both grounded through a bidirectional variable resistance diode.

15. The electrical stimulation massage device of claim 1 or 12, wherein: The pulse modulation circuit is provided with a plurality of pulse modulation circuits, and each pulse modulation circuit is provided with two electrodes.

16. The electrical stimulation massage device of claim 1, wherein, The voltage output end of the voltage boosting unit is connected to the pulse modulation circuit, and the control unit is configured to control the voltage boosting circuit and / or the energy storage circuit to boost voltage or control the pressure relief circuit to reduce voltage according to a preset voltage and an impedance value between the electrodes in each pair of electrodes, so that the voltage output end outputs the preset voltage to the pulse modulation circuit.

17. The electrical stimulation massage device of claim 16, wherein, The voltage boosting circuit comprises an inductor and a MOS tube, one end of the inductor is connected to the input end of the voltage boosting circuit, and the other end is connected to the output end of the voltage boosting circuit, the gate of the MOS tube is connected to the control end of the voltage boosting circuit, the drain of the MOS tube is connected between the inductor and the output end of the voltage boosting circuit, and the source of the MOS tube is grounded.

18. The electrical stimulation massage device of claim 16, wherein: The voltage boosting unit further comprises a diode connected in series between the output end of the voltage boosting circuit and the input end of the energy storage circuit, and / or the energy storage circuit is a capacitor type energy storage circuit.

19. The electrical stimulation massage device of claim 16, wherein: The energy storage circuit is a capacitor type energy storage circuit, and the capacitor type energy storage circuit comprises a fourth capacitor and a fifth capacitor connected in parallel between the input end and the output end of the energy storage circuit, and the other end of the fourth capacitor and the fifth capacitor is grounded.

20. The electrical stimulation massage device of claim 16, wherein: The pressure relief circuit comprises a first resistor, a fifth triode, a second resistor and a third resistor, the first resistor is connected in series between the control end of the pressure relief circuit and the base of the fifth triode, the emitter of the fifth triode is grounded, one end of the third resistor is connected between the first resistor and the base of the fifth triode, and the other end is grounded, and the second resistor is connected in series between the input end of the pressure relief circuit and the collector of the fifth triode.

21. A control method characterized by, The control method is applied to the electric stimulation massage device, and the steps of the control method comprise: The control unit controls the pulse modulation circuit to generate an electric stimulation pulse signal; The control unit controls the pulse modulation circuit to generate an electric stimulation pulse signal; The control unit controls the pulse modulation circuit to generate an electric stimulation pulse signal; The control unit controls the pulse modulation circuit to generate an electric stimulation pulse signal; The control unit controls the pulse modulation circuit to generate an electric stimulation pulse signal; When the impedance value is abnormal, the next cycle stops controlling the electrode outputting the electric stimulation pulse signal corresponding to the pair of settings of the abnormal impedance value.

22. The control method according to claim 21, characterized by, The control method further comprises: recording the impedance value of each electric stimulation loop; When the impedance value of an electric stimulation loop is abnormal, notifying the user.

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