Electrotherapy Pulse Signal Control Method and Electrotherapy Device

Abstract

The present invention relates to the technical field of low-frequency pulsed electrotherapy, and discloses a method for controlling an electrotherapy pulse signal and an electrotherapy device, aiming to achieve accurate automatic adjustment of the pulse amplitude of the electrotherapy pulse signal. The main solutions include: selecting a plurality of output intervals from the output intervals of the electrotherapy pulse signal, and respectively taking each selected output interval as a detection node; at each detection node, detecting the human body impedance of the user at the corresponding test frequency, and obtaining a first corresponding relationship between the test frequency and the human body impedance at each detection node, where the test frequency includes at least all the pulse frequencies between the current detection node and the next detection node; when the electrotherapy pulse signal is output, determining the human body impedance of the user according to the pulse frequency of the electrotherapy pulse signal and based on the first corresponding relationship at the previous detection node, and matching the pulse amplitude of the electrotherapy pulse signal according to the determined human body impedance. The present invention improves the comfort of the user and is particularly suitable for a neck massager.

Description

Technical Field

[0001] The present invention relates to the technical field of low-frequency pulsed electrotherapy, and specifically to a method for controlling electrotherapy pulse signals and an electrotherapy device. Background Art

[0002] Low-frequency pulsed electrotherapy refers to a method of treating diseases by applying pulsed currents with a frequency below 1000 Hz. Its main principle is to stimulate nerves transcutaneously, that is, to stimulate specific excited nerves with pain symptoms through electric currents, thereby achieving the effect of relieving pain.

[0003] Existing electrotherapy devices using low-frequency pulsed electrotherapy, such as neck massagers, usually output electrotherapy pulse signals with different pulse frequencies in sequence through electrode patches to simulate different massage effects according to a preset electrotherapy program during electrotherapy. And due to individual differences among users, the skin impedance and tolerance of each user are different. Therefore, different users have different requirements for the pulse intensity during electrotherapy. In the prior art, different electrotherapy gears are usually set to adjust the pulse amplitude of the electrotherapy pulse signal, and then electrotherapy pulse signals with different intensities are output.

[0004] The method of adjusting the pulse amplitude through electrotherapy gears has the following problems:

[0005] (1) Since the neck massager is located at the back of the human brain during operation, when gear adjustment is required, the user cannot see the electrotherapy gear, and the operation is very inconvenient;

[0006] (2) After the user adjusts to a suitable electrotherapy gear, if the skin sweats due to environmental changes or long electrotherapy time, the skin impedance will change. At this time, the pulse intensity felt by the user is different, making the originally set electrotherapy gear no longer suitable, and the user needs to manually adjust again, and the operation is very cumbersome;

[0007] (3) When the user adjusts through the electrotherapy gear, it means that the user already feels that the pulse intensity of the current electrotherapy is not suitable, that is, the adjustment depends on the user's sensory feedback, and the user's comfort experience is poor;

[0008] (4) Electrotherapy devices usually can only set a small number of electrotherapy gears, and the pulse intensities that users can choose are few. In actual use, it is difficult for users to adjust the electrotherapy pulse signal to the optimal pulse intensity through the electrotherapy gear, and the adjustment accuracy is low;

[0009] (5) Since electrotherapy pulse signals with different pulse frequencies have different depths of action on the human skin, the human impedance of users is also different at different pulse frequencies. Therefore, even if the same electrotherapy gear is set, different pulse frequencies will make users feel different pulse intensities, and the user's comfort experience is poor. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide an electrotherapy pulse signal control method and an electrotherapy device, which can automatically and accurately adjust the pulse amplitude of the electrotherapy pulse signal according to the pulse frequency of the electrotherapy pulse signal and the change trend of the human body impedance, thereby improving the comfort of the user.

[0011] The technical solution adopted by the present invention to solve the above technical problem is as follows:

[0012] On the one hand, the present invention provides an electrotherapy pulse signal control method, in which the pulse frequency of the electrotherapy pulse signal changes accordingly according to the electrotherapy program, and the method includes the following steps:

[0013] Select a plurality of output intervals from the output intervals of the electrotherapy pulse signal, and respectively use each selected output interval as a detection node;

[0014] At each detection node, detect the human body impedance of the user at the corresponding test frequency to obtain the first correspondence between the test frequency and the human body impedance at each detection node, and the test frequency includes at least all the pulse frequencies between the current detection node and the next detection node;

[0015] When the electrotherapy pulse signal is output, determine the human body impedance of the user according to the pulse frequency of the electrotherapy pulse signal and based on the first correspondence at the previous detection node, and match the pulse amplitude of the electrotherapy pulse signal according to the determined human body impedance.

[0016] Further, the interval duration between adjacent detection nodes is equal.

[0017] Further, the method for selecting a plurality of output intervals from the output intervals of the electrotherapy pulse signal includes:

[0018] Select all the output intervals of the electrotherapy pulse signal.

[0019] Further, at each detection node, the method for detecting the human body impedance of the user at the corresponding test frequency includes:

[0020] Set up an impedance detection circuit;

[0021] At each detection node, output a test pulse signal corresponding to the test frequency respectively, and make the test pulse signal only pass through the human skin and the impedance detection circuit in sequence;

[0022] Obtain the human body impedance corresponding to each test frequency at the corresponding detection node through the impedance detection circuit.

[0023] Further, the impedance detection circuit at least includes a sampling resistor and a voltage acquisition and processing device. The test pulse signal can only pass through the human skin and the sampling resistor in sequence. The method for obtaining the human impedance corresponding to each test frequency under the corresponding detection node through the impedance detection circuit includes:

[0024] Obtain the voltage of the test pulse signal and the impedance of the sampling resistor;

[0025] After the test pulse signal at each detection node is output, obtain the voltage on the sampling resistor through the voltage acquisition and processing device, and obtain the human impedance corresponding to the test frequency of the test pulse signal based on the voltage on the sampling resistor, the voltage of the test pulse signal, and the impedance of the sampling resistor.

[0026] Further, the method for matching the pulse amplitude of the electrotherapy pulse signal according to the determined human impedance further includes:

[0027] Obtain the current electrotherapy gear, and determine the second corresponding relationship between the human impedance and the pulse amplitude under the current electrotherapy gear;

[0028] Match the pulse amplitude of the electrotherapy pulse signal according to the determined human impedance and based on the second corresponding relationship.

[0029] On the other hand, the present invention also proposes an electrotherapy device, including a pulse generating device and a plurality of electrotherapy electrodes, and further including: an amplitude matching device and an impedance detection circuit;

[0030] The pulse generating device is used to output a corresponding electrotherapy pulse signal according to the electrotherapy program and the matched pulse amplitude, and respectively use the output gap of the selected electrotherapy pulse signal as a detection node, and output a test pulse signal with a corresponding test frequency at each detection node. The test frequency at least includes all pulse frequencies between the current detection node and the next detection node;

[0031] The impedance detection circuit is used to detect the user's human impedance at each detection node at the corresponding test frequency, and obtain the first corresponding relationship between the test frequency and the human impedance at each detection node;

[0032] The amplitude matching device is used to determine the user's human impedance according to the pulse frequency of the electrotherapy pulse signal and based on the first corresponding relationship at the previous detection node when the electrotherapy pulse signal is output, and match the pulse amplitude of the electrotherapy pulse signal according to the determined human impedance.

[0033] Further, the plurality of electrotherapy electrodes at least includes a first electrotherapy electrode and a second electrotherapy electrode, and the electrotherapy device further includes at least: a first electronic switch, a second electronic switch, a third electronic switch, and a fourth electronic switch. The pulse signal output port of the pulse generating device is grounded successively through the first electronic switch, the first electrotherapy electrode, and the third electronic switch. The pulse signal output port of the pulse generating device is also grounded successively through the second electronic switch, the second electrotherapy electrode, and the fourth electronic switch.

[0034] The pulse generating device is further configured to control the opening and closing of the first electronic switch, the second electronic switch, the third electronic switch, and the fourth electronic switch according to the electrotherapy program when outputting an electrotherapy pulse signal.

[0035] Further, the impedance detection circuit includes: a sampling resistor, a voltage acquisition and processing device, and a fifth electronic switch. The second electrotherapy electrode is grounded successively through the sampling resistor and the fifth electronic switch, and the voltage acquisition and processing device is connected to the sampling resistor.

[0036] The pulse generating device is further configured to control the first electronic switch and the fifth electronic switch to close, and control the second electronic switch, the third electronic switch, and the fourth electronic switch to open before the test pulse signal of each detection node is output, so that the test pulse signal can only pass successively through the first electrotherapy electrode, the human skin, the second electrotherapy electrode, and the sampling resistor; and control the fifth electronic switch to open when outputting an electrotherapy pulse signal.

[0037] The voltage acquisition and processing device is configured to obtain the voltage on the sampling resistor after the test pulse signal of each detection node is output, and obtain the human impedance corresponding to the test frequency of the test pulse signal according to the voltage on the sampling resistor, the voltage of the test pulse signal, and the impedance of the sampling resistor.

[0038] Further, the amplitude matching device is further configured to obtain the current electrotherapy gear, determine the second correspondence between the human impedance and the pulse amplitude at the current electrotherapy gear, and match the pulse amplitude of the electrotherapy pulse signal according to the determined human impedance based on the second correspondence.

[0039] The beneficial effects of the present invention are as follows: For the electrotherapy pulse signal control method and electrotherapy device of the present invention, by detecting the first correspondence between the test frequency and the human body impedance during the output gap of the electrotherapy pulse signal, and matching the pulse amplitude according to the human body impedance corresponding to the pulse frequency when the electrotherapy pulse signal is output, the user can have a substantially same current feeling at different pulse frequencies. Moreover, since the present invention also uses the output gaps of multiple electrotherapy pulse signals as detection nodes and detects the first correspondence between the test frequency and the human body impedance at each detection node, it avoids the influence of the change in the human body impedance caused by environmental changes or sweating on the user's current feeling, and improves the user's comfort. The present invention can accurately adjust the pulse amplitude of the electrotherapy pulse signal without manual operation by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the circuit model of the human body impedance described in the present invention;

[0041] Figure 2 It is a schematic flowchart of the electrotherapy pulse signal control method described in the present invention;

[0042] Figure 3 It is a schematic diagram of the principle of the electrotherapy pulse signal control described in the present invention;

[0043] Figure 4 It is a schematic diagram of the structure of the existing electrotherapy device;

[0044] Figure 5 It is a schematic diagram of the structure of the electrotherapy device described in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] For the electrotherapy pulse signal control method described in the present invention, the pulse frequency of the electrotherapy pulse signal changes accordingly according to the electrotherapy program, and it includes the following steps: Select multiple output gaps from the output gaps of the electrotherapy pulse signal, and respectively use each selected output gap as a detection node; At each detection node, detect the human body impedance of the user at the corresponding test frequency to obtain the first correspondence between the test frequency and the human body impedance at each detection node, and the test frequency includes at least all the pulse frequencies between the current detection node and the next detection node; When the electrotherapy pulse signal is output, determine the human body impedance of the user according to the pulse frequency of the electrotherapy pulse signal and based on the first correspondence at the previous detection node, and match the pulse amplitude of the electrotherapy pulse signal according to the determined human body impedance.

[0047] It can be understood that during the electrotherapy process of a user using a fixed electrotherapy gear of an electrotherapy device, the pulse amplitude of the electrotherapy pulse signal remains unchanged. When the human body impedance changes, the pulse intensity felt by the user will be different. Among them, there are two reasons for the change in human body impedance: one is the change in skin condition, and the other is the change in pulse frequency. For example, when the environmental humidity changes or the skin sweats, resulting in an increase in skin humidity, it will reduce the resistance to the movement of electric charges, and the decrease in resistance makes the human body impedance smaller, thereby increasing the pulse intensity felt by the user.

[0048] The following specifically explains the principle of the change in human body impedance caused by the pulse frequency:

[0049] The human body impedance is the sum of the skin impedance and the impedance of other subcutaneous tissues. In the skin, the outermost layer is the epidermis, which contains the stratum corneum. The stratum corneum has extremely poor electrical conductivity and is equivalent to a dielectric. Under the epidermis are the dermis and subcutaneous tissues, which contain a large number of blood vessels and thus have good electrical conductivity and can be simulated as a pure resistor R. That is, a layer of epidermis with extremely poor electrical conductivity is sandwiched between the dermis with good electrical conductivity and the electrode patch. This structure is equivalent to a capacitor C. There are sweat pores in the epidermis, and a small amount of ions will pass through. Therefore, this capacitor is a leaking capacitor, that is, the capacitor C is connected in parallel with a resistor R'. Based on this, the circuit model of the human body impedance can be obtained, as Figure 1 shown. Under this circuit model, the skin impedance Z is a function of the pulse frequency f, that is:

[0050]

[0051] From an electrical perspective, the dry keratinized tissue on the outermost layer of the skin hinders most of the charge movement and has the largest resistance. Under the excitation of a signal with a pulse frequency less than 10KHz, the skin depth of action is smaller, and the skin impedance mainly depends on the stratum corneum. Under the excitation of a signal with a pulse frequency greater than 10KHz, the skin depth of action is larger, and the contribution of the stratum corneum to the skin impedance is smaller. Therefore, the smaller the skin depth of action, the larger the skin impedance, and the larger the skin depth of action, the smaller the skin impedance. And according to the above model, it can also be seen that when the pulse frequency f is larger, the skin impedance Z is lower, and when the pulse frequency f is smaller, the skin impedance Z is higher. Therefore, it can be concluded that when the pulse frequency is larger, the human body impedance is lower, and when the pulse frequency is smaller, the human body impedance is higher.

[0052] To avoid different current sensations for the user due to changes in human impedance, the present invention automatically matches the pulse amplitude of the electrotherapy pulse signal mainly from two aspects: pulse frequency and skin state changes, so that the user's current sensation during electrotherapy is basically the same. Specifically, the present invention selects multiple output intervals from the output intervals of the electrotherapy pulse signal, respectively takes each selected output interval as a detection node, and determines the human impedance of the current user under the action of test pulse signals with different test frequencies at each detection node. When the electrotherapy pulse signal corresponding to the subsequent pulse frequency is output, the human impedance corresponding to it can be determined according to its pulse frequency, and then the pulse amplitude of the electrotherapy pulse signal can be matched according to the determined human impedance, so that the user can achieve basically the same current sensation at different pulse frequencies. And because the interval time between two adjacent detection nodes is short, therefore, the change in skin state within the interval time can be ignored, that is, the first correspondence detected at the current detection node can be used as the basis for determining the human impedance in the time period after the current detection node and before the next detection node. By analogy, the shorter the interval time between detection nodes, the lower the degree of skin state change, and the more accurate the determined human impedance.

[0053] In the actual application process, when the determined human impedance is larger, the pulse amplitude of the matched electrotherapy pulse signal is also larger. Correspondingly, when the determined human impedance is smaller, the pulse amplitude of the matched electrotherapy pulse signal is also smaller, so that the user can achieve basically the same current sensation when the human impedance changes.

[0054] Embodiment

[0055] The electrotherapy pulse signal control method according to the embodiment of the present invention, the pulse frequency of the electrotherapy pulse signal changes accordingly according to the electrotherapy program, as Figure 2 shown, includes the following steps:

[0056] Select multiple output intervals from the output intervals of the electrotherapy pulse signal, and respectively take each selected output interval as a detection node;

[0057] At each detection node, detect the human impedance of the user at the corresponding test frequency, and obtain the first correspondence between the test frequency and the human impedance at each detection node. The test frequency includes at least all pulse frequencies after the current detection node and before the next detection node;

[0058] When the electrotherapy pulse signal is output, determine the human impedance of the user according to the pulse frequency of the electrotherapy pulse signal and based on the first correspondence at the previous detection node, and match the pulse amplitude of the electrotherapy pulse signal according to the determined human impedance.

[0059] In the actual application process, multiple detection nodes with equal interval durations can be set, that is, select the output gaps of the same number of pulse signals at intervals as the detection nodes, thereby reducing the error fluctuation of pulse amplitude matching. In this embodiment, the output gaps of multiple selected electrotherapy pulse signals are used as detection nodes, and the human impedance is measured at each detection node, and the human impedance detected each time is used as the basis for adjusting the pulse amplitude of the subsequent electrotherapy pulse signal. The specific method is as follows:

[0060] Detect the human impedance at the current detection node corresponding to the test frequency. The corresponding test frequency means that the test frequency includes at least all the pulse frequencies between the current detection node and the next detection node. Then, establish a first correspondence between all the pulse frequencies between the current detection node and the next detection node and the human impedance according to the human impedance at the test frequency. Before the electrotherapy pulse signal is output between the current detection node and the next detection node, determine the corresponding human impedance according to its pulse frequency and the first correspondence, and determine the target pulse amplitude of the corresponding electrotherapy pulse signal according to the determined human impedance. Finally, adjust the pulse amplitude to the target pulse amplitude when the electrotherapy pulse signal is output. After all the pulse frequencies between the current detection node and the next detection node are output, enter the next detection node, and use the same method to detect the human impedance and match the pulse amplitude at the next detection node until the electrotherapy program ends.

[0061] Among them, the method of matching the pulse amplitude of the electrotherapy pulse signal according to the determined human impedance can include: when the determined human impedance is larger, control the output of an electrotherapy pulse signal with a larger target pulse amplitude. Correspondingly, when the determined human impedance is smaller, control the output of an electrotherapy pulse signal with a smaller target pulse amplitude, so that the user can achieve a basically consistent current feeling when the human impedance changes. For example: if the human impedance is 2000 ohms at a pulse frequency of 100 Hz and 1000 ohms at a pulse frequency of 500 Hz, then an electrotherapy pulse signal with an amplitude of 50 V can be output at a pulse frequency of 100 Hz, and the current is 25 mA at this time; when the electrotherapy pulse signal has a pulse frequency of 500 Hz, an electrotherapy pulse signal with an amplitude of 25 V is output, and the current is also 25 mA. Thus, the user can have a basically the same current feeling for electrotherapy with pulse frequencies of 100 Hz and 500 Hz.

[0062] In specific use, the second corresponding relationship between the human body impedance and the target pulse amplitude can be preset to achieve the above purpose. At the same time, in order to avoid discomfort caused by individual differences of users, for an electrotherapy device with multiple electrotherapy gears, in this embodiment, the second corresponding relationship between the human body impedance and the target pulse amplitude under different electrotherapy gears can also be preset, that is, each electrotherapy gear corresponds to a second corresponding relationship. The higher the electrotherapy gear, the greater the pulse amplitude corresponding to the same human body impedance. When matching the pulse amplitude of the electrotherapy pulse signal according to the determined human body impedance, first obtain the current electrotherapy gear, and determine the second corresponding relationship between the human body impedance and the pulse amplitude under the current electrotherapy gear, and then match the pulse amplitude of the electrotherapy pulse signal according to the determined human body impedance and based on the second corresponding relationship. In this way, when the optimal pulse intensity is different due to individual differences of users, it can be adjusted through the electrotherapy gear, increasing the selectivity of the user.

[0063] Since the shorter the interval time between detection nodes, the lower the degree of skin state change, and the more accurate the determined human body impedance. Therefore, in order to improve the accuracy of human body impedance detection, as Figure 3 shown, in this embodiment, the output gap of each electrotherapy pulse signal can be used as a detection node respectively, and the human body impedance detected at each detection node can be used as the basis for adjusting the pulse amplitude of the next electrotherapy pulse signal. The specific method is as follows:

[0064] Detect the human body impedance at the current detection node under the pulse frequency of the next electrotherapy pulse signal, establish the first corresponding relationship between the next pulse frequency and the human body impedance. Before the next electrotherapy pulse signal is output, determine the human body impedance according to its pulse frequency and the first corresponding relationship, and determine the target pulse amplitude of the next electrotherapy pulse signal according to the determined human body impedance. Then, when the next electrotherapy pulse signal is output, adjust its pulse amplitude to the target pulse amplitude. After the next electrotherapy pulse signal is output, enter the next detection node, and use the same method to detect the human body impedance and match the pulse amplitude at the next detection node until the electrotherapy program ends.

[0065] Taking the existing electrotherapy device as an example below, the specific method for detecting the human body impedance will be described in detail. Among them, the electrotherapy device can be a neck massager or other electrotherapy devices.

[0066] As Figure 4As shown, the electrotherapy device in the prior art mainly includes: a pulse generating device and a plurality of electrotherapy electrodes. In this embodiment, the plurality of electrotherapy electrodes at least include a first electrotherapy electrode and a second electrotherapy electrode. The electrotherapy device further includes: a first electronic switch, a second electronic switch, a third electronic switch, and a fourth electronic switch. The pulse signal output port of the pulse generating device is grounded successively through the first electronic switch, the first electrotherapy electrode, and the third electronic switch. The pulse signal output port of the pulse generating device is also grounded successively through the second electronic switch, the second electrotherapy electrode, and the fourth electronic switch. Among them, the pulse generating device is used to output an electrotherapy pulse signal with a corresponding pulse frequency according to the electrotherapy program and control the opening and closing of the first electronic switch, the second electronic switch, the third electronic switch, and the fourth electronic switch according to the electrotherapy program, so as to simulate different massage effects. The related control method belongs to the prior art and will not be elaborated here.

[0067] In order to realize the detection of human impedance, as Figure 5 shown, this embodiment adds an impedance detection circuit. The impedance detection circuit includes: a sampling resistor, a voltage acquisition and processing device, and a fifth electronic switch. The second electrotherapy electrode is grounded successively through the sampling resistor and the fifth electronic switch. The voltage acquisition and processing device is connected to the sampling resistor.

[0068] After setting up the impedance detection circuit, the method for detecting the user's human impedance at the corresponding test frequency in this embodiment includes: outputting a test pulse signal with a corresponding test frequency at each detection node, and making the test pulse signal only able to pass through the human skin and the impedance detection circuit successively, and then obtaining the human impedance corresponding to each test frequency at the corresponding detection node through the impedance detection circuit.

[0069] Specifically, at each detection node, the pulse generating device controls the first electronic switch and the fifth electronic switch to close, and controls the second electronic switch, the third electronic switch, and the fourth electronic switch to open. Then the pulse generating device outputs a test pulse signal, so that the test pulse signal can only pass through the first electrotherapy electrode, the human skin, the second electrotherapy electrode, and the sampling resistor successively. Since the skin is a complex combination of resistors and capacitors of different sizes and is a complex circuit with capacitive impedance having parallel and series connections, this makes the characteristic of human impedance essentially present the characteristic of capacitive impedance. Therefore, to accurately measure human impedance, an AC pulse signal needs to be used as the test pulse signal.

[0070] After the pulse generating device outputs the test pulse signal, the voltage on the sampling resistor is obtained through the voltage acquisition and processing device, and the human impedance corresponding to the test frequency of the test pulse signal is obtained according to the voltage on the sampling resistor, the voltage of the test pulse signal, and the impedance of the sampling resistor.

[0071] It can be understood that after the voltage across the sampling resistor is acquired, subtracting the voltage across the sampling resistor from the voltage of the test pulse signal can obtain the human body voltage. Therefore, when the impedance of the sampling resistor, the voltage across the sampling resistor, and the human body voltage are all known, the human body impedance can be obtained using Ohm's law.

[0072] After detecting the human body impedance corresponding to all pulse frequencies between the current detection node and the next detection node, the pulse generating device controls the fifth electronic switch to disconnect, enabling the electrotherapy pulse signal to be normally output and perform electrotherapy on the user.

[0073] Based on the above technical solution, this embodiment also proposes an electrotherapy device, including a pulse generating device and multiple electrotherapy electrodes, and further including: an amplitude matching device and an impedance detection circuit;

[0074] The pulse generating device is configured to output corresponding electrotherapy pulse signals according to the electrotherapy program and the matched pulse amplitude, and respectively use the output intervals of the multiple electrotherapy pulse signals as detection nodes, and output test pulse signals corresponding to the test frequencies at each detection node, where the test frequencies at least include all pulse frequencies between the current detection node and the next detection node;

[0075] The impedance detection circuit is configured to detect the human body impedance of the user at each detection node corresponding to the test frequency, and obtain the first corresponding relationship between the test frequency and the human body impedance at each detection node;

[0076] The amplitude matching device is configured to, when the electrotherapy pulse signal is output, determine the human body impedance of the user according to the pulse frequency of the electrotherapy pulse signal and based on the first corresponding relationship at the previous detection node, and match the pulse amplitude of the electrotherapy pulse signal according to the determined human body impedance.

[0077] It can be understood that since the electrotherapy device described in the embodiments of the present invention is a device for implementing the electrotherapy pulse signal control method described in the embodiments, for the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method.

Claims

1. An electrotherapy device, comprising a pulse generating device and a plurality of electrotherapy electrodes, characterized in that, Further included are: an amplitude matching device and an impedance detection circuit; The pulse generating device is configured to output a corresponding electrotherapy pulse signal according to an electrotherapy program and a matched pulse amplitude, and respectively use the output intervals of the selected electrotherapy pulse signals as detection nodes, and output test pulse signals corresponding to test frequencies at each detection node, where the test frequencies at least include all pulse frequencies between the current detection node and the next detection node; The impedance detection circuit is configured to detect the human impedance of a user at each detection node at the corresponding test frequency, and obtain a first corresponding relationship between the test frequency and the human impedance at each detection node; The amplitude matching device is configured to, when the electrotherapy pulse signal is output, determine the human impedance of the user according to the pulse frequency of the electrotherapy pulse signal and based on the first corresponding relationship at the previous detection node, and match the pulse amplitude of the electrotherapy pulse signal according to the determined human impedance.

2. The electrotherapy device according to claim 1, wherein The method for detecting the human impedance of a user at the corresponding test frequency at each detection node includes: Outputting test pulse signals corresponding to the test frequencies at each detection node respectively, and enabling the test pulse signals to only pass through the human skin and the impedance detection circuit in sequence; Obtaining the human impedance corresponding to each test frequency at the corresponding detection node through the impedance detection circuit respectively.

3. The electrotherapy device according to claim 2, wherein The multiple electrotherapy electrodes at least include a first electrotherapy electrode and a second electrotherapy electrode, and the electrotherapy device further at least includes: a first electronic switch, a second electronic switch, a third electronic switch, and a fourth electronic switch. The pulse signal output port of the pulse generating device is grounded through the first electronic switch, the first electrotherapy electrode, and the third electronic switch in sequence, and the pulse signal output port of the pulse generating device is also grounded through the second electronic switch, the second electrotherapy electrode, and the fourth electronic switch in sequence; The pulse generating device is further configured to control the opening and closing of the first electronic switch, the second electronic switch, the third electronic switch, and the fourth electronic switch according to the electrotherapy program when outputting the electrotherapy pulse signal.

4. The electrotherapy device according to claim 3, characterized in that, The impedance detection circuit includes: a sampling resistor, a voltage acquisition and processing device, and a fifth electronic switch. The second electrotherapy electrode is grounded through the sampling resistor and the fifth electronic switch in sequence, and the voltage acquisition and processing device is connected to the sampling resistor; The pulse generating device is further configured to control the first electronic switch and the fifth electronic switch to close, and control the second electronic switch, the third electronic switch, and the fourth electronic switch to open before the test pulse signal at each detection node is output, so that the test pulse signal can only pass through the first electrotherapy electrode, the human skin, the second electrotherapy electrode, and the sampling resistor in sequence; and control the fifth electronic switch to open when outputting the electrotherapy pulse signal; The voltage acquisition and processing device is configured to, after the test pulse signal at each detection node is output, acquire the voltage on the sampling resistor, and obtain the human impedance corresponding to the test frequency of the test pulse signal according to the voltage on the sampling resistor, the voltage of the test pulse signal, and the impedance of the sampling resistor.

5. The electrotherapy device according to claim 1, characterized in that, The amplitude matching device is further configured to obtain the current electrotherapy gear, determine a second correspondence between the human body impedance and the pulse amplitude at the current electrotherapy gear, and match the pulse amplitude of the electrotherapy pulse signal based on the determined human body impedance and the second correspondence.

6. The electrotherapy device according to claim 1, wherein, The interval duration between adjacent detection nodes is equal.

7. The electrotherapy device according to claim 1, wherein The output gaps of the selected electrotherapy pulse signal include all output gaps of the electrotherapy pulse signal.

Images