A dual channel electrical stimulation device based on wireless communication

Abstract

The utility model provides a kind of double-channel electric stimulation device based on wireless communication, including terminal equipment and electric stimulation equipment, electric stimulation equipment includes first single-chip microcontroller, second single-chip microcontroller, third single-chip microcontroller, first isolation chip, second isolation chip, first electrode piece and second electrode piece, first single-chip microcontroller is connected first isolation chip, second isolation chip respectively, first isolation chip connects second single-chip microcontroller, second isolation chip connects third single-chip microcontroller connection, second single-chip microcontroller and first electrode piece electrically connected, third single-chip microcontroller and second electrode piece electrically connected, terminal equipment and first single-chip microcontroller wireless communication connection.The electric stimulation equipment of the device is equipped with three single-chip microcontrollers, realizes communication isolation by SPI one master two slave communication mode, solves the limitation problem that only unique serial port of existing nrf52832 single-chip microcontroller, simultaneously due to first isolation chip, second isolation chip, so power isolation can be realized.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a dual-channel electrical stimulation device based on wireless communication. Background Technology

[0002] Neuromuscular electrical stimulation (NMES) is a rehabilitation therapy technique that uses low-frequency pulsed current to stimulate muscles or nerves, inducing muscle contraction or regulating nerve function. It is commonly used to improve muscle atrophy, enhance muscle strength, relieve pain, and promote nerve function recovery, and is suitable for sports injuries, postoperative rehabilitation, and neurological diseases.

[0003] Electrical stimulation of the diseased nerves and the muscles they innervate can induce rhythmic muscle contractions, improve blood circulation, promote venous and lymphatic return, delay muscle atrophy, aid in compensatory proliferation of muscle fibers, and promote the recovery of nerve excitation and conduction functions.

[0004] Most existing dual-channel stimulation methods use a common microcontroller to control multiple isolated MOSFETs to achieve power isolation circuit stimulation output. Furthermore, wireless communication requires an external Bluetooth or Wi-Fi module connected to the serial port. This approach is not only costly but also cannot achieve synchronous operation without interference. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a dual-channel electrical stimulation device based on wireless communication to solve the problems of high cost and inability to achieve synchronous operation without interference in the prior art.

[0006] To achieve the above and other related objectives, this utility model provides a dual-channel electrical stimulation device based on wireless communication, including a terminal device and an electrical stimulation device. The electrical stimulation device includes a first microcontroller, a second microcontroller, a third microcontroller, a first isolation chip, a second isolation chip, a first electrode plate, and a second electrode plate. The first microcontroller is connected to the first isolation chip and the second isolation chip, the first isolation chip is connected to the second microcontroller, the second isolation chip is connected to the third microcontroller, the second microcontroller is electrically connected to the first electrode plate, the third microcontroller is electrically connected to the second electrode plate, and the terminal device is wirelessly connected to the first microcontroller.

[0007] In one embodiment of the present invention, the dual-channel electrical stimulation device based on wireless communication further includes a Bluetooth receiver. The terminal device and the Bluetooth receiver communicate via a serial port. The Bluetooth receiver is connected to a first microcontroller via Bluetooth communication. The Bluetooth receiver sends the data received from the terminal device to the first microcontroller via wireless Bluetooth communication and sends the data returned by the first microcontroller via the serial port back to the terminal device.

[0008] In one embodiment of the present invention, the electrical stimulation device further includes a first boost module and a second boost module connected to a first microcontroller. The first boost module is connected to a second microcontroller and a first electrode plate, respectively, and the second boost module is connected to a third microcontroller and a second electrode plate, respectively.

[0009] In one embodiment of the present invention, the electrostimulation device further includes an isolation stimulation boost power supply circuit, the input terminal of which is connected to a first microcontroller, and the input terminals of the first boost module and the second boost module are both connected to the output terminal of the isolation stimulation boost power supply circuit.

[0010] In one embodiment of the present invention, the electrostimulation device further includes a main power supply, and an isolated stimulation boost power supply circuit including a first MOSFET, a second MOSFET, a first filter module, a second filter module, a third isolation chip, a fourth isolation chip, a first transformer, a second transformer, a first voltage regulator chip, and a second voltage regulator chip. A first microcontroller controls stim_pwr_Ctr to be high, so that the main power supply voltage passes through the first MOSFET, the first filter module, the third isolation chip, and the first transformer to output an isolated stimulation boost power supply 1. After passing through the second MOSFET, the second filter module, the fourth isolation chip, and the second transformer, the isolated stimulation boost power supply 2 is output. The stimulation boost power supply 1 outputs a stable voltage after passing through the first voltage regulator chip to drive the first boost module, and the stimulation boost power supply 2 outputs a stable voltage after passing through the second voltage regulator chip to drive the second boost module.

[0011] In one embodiment of the present invention, the first boost module includes a first boost circuit and a second boost circuit, and the second boost module includes a third boost circuit and a fourth boost circuit. When the second microcontroller and the third microcontroller receive the start stimulation command issued by the first microcontroller, they control the first boost circuit and the third boost circuit to output a 500kHz PWM waveform, and control the second boost circuit and the fourth boost circuit to output a 32kHz PWM waveform.

[0012] In one embodiment of the present invention, the first boost circuit includes a third transformer, and the third boost circuit includes a fourth transformer. When the third transformer and the fourth transformer boost the voltage, the pin levels of Power_Trans_1 of the first boost circuit and Power_Trans_2 of the third boost circuit will also increase. The boost voltage level is determined by detecting the values ​​of Power_ADC_1 after filtering Power_Trans_1 and Power_ADC_2 after filtering Power_Trans_2, thereby controlling the start and stop of the 500KHz PWM waveform output by the first boost circuit and the third boost circuit.

[0013] In one embodiment of the present invention, the electrostimulation device further includes a first electrostimulation generating circuit and a second electrostimulation generating circuit. The input terminal of the first electrostimulation generating circuit is connected to a first boost circuit and a second boost circuit, and the output terminal is connected to two electrodes of a first electrode sheet. The input terminal of the second electrostimulation generating circuit is connected to the first boost circuit and the second boost circuit, and the output terminal is connected to two electrodes of a second electrode sheet.

[0014] In one embodiment of the present invention, the electrical stimulation device further includes a first electrode plate connected to a monitoring circuit and a second electrode plate connected to a monitoring circuit.

[0015] In one embodiment of the present invention, the input terminal of the first electrode plate connection monitoring circuit is connected to the first electrical stimulation generating circuit, and the input terminal of the second electrode plate connection monitoring circuit is connected to the second electrical stimulation generating circuit. The first electrode plate is detached by detecting the voltage value of the output terminal TL_ADC_1 of the first electrode plate connection monitoring circuit during the stimulation cycle, and the second electrode plate is detached by detecting the voltage value of the output terminal TL_ADC_2 of the second electrode plate connection monitoring circuit during the stimulation cycle.

[0016] As described above, the dual-channel electrical stimulation device based on wireless communication of this invention has the following beneficial effects: 1. This utility model provides a novel dual-channel electrical stimulation device based on wireless communication. The device incorporates three microcontrollers: a first microcontroller as the master, and second and third microcontrollers as slaves. Through SPI (One Master, Two Slave) communication, communication isolation between the one NRF52832 microcontroller and the two slave NRF52832 microcontrollers is achieved, overcoming the limitation of existing NRF52832 microcontrollers having only a single serial port. Furthermore, since the first and second microcontrollers, and the first and third microcontrollers are isolated via a first isolation chip and a second isolation chip respectively, power supply isolation is achieved. Thus, the first and second isolation chips provide dual isolation effects: communication isolation and power supply isolation. 2. A first boost module is provided between the first microcontroller and the first electrode plate, and a second boost module is provided between the first microcontroller and the second electrode plate. The first boost module includes a first boost circuit and a second boost circuit, and the second boost module includes a third boost circuit and a fourth boost circuit. When the second microcontroller and the third microcontroller receive the start stimulation command issued by the first microcontroller, the second microcontroller controls the first boost circuit and the third boost circuit to output a PWM waveform of a first frequency, and the third microcontroller controls the second boost circuit and the fourth boost circuit to output a PWM waveform of a second frequency. This utility model can output two PWM waveforms of different frequencies simultaneously, and has many advantages such as good stimulation effect, strong applicability, and fast adaptation speed. 3. An isolation stimulation boost power supply circuit is provided between the first boost module, the second boost module and the first microcontroller, which can realize the isolation of the stimulation boost power supply. Combined with the communication isolation and power isolation achieved by setting the first isolation chip and the second isolation chip, this utility model can achieve the technical effect of multiple isolation. 4. It can control the start and stop of the first frequency PWM waveform output by the first boost circuit and the third boost circuit, thereby preventing the transformer from being damaged by excessive voltage. By controlling the duty cycle of the first frequency PWM waveform, it can achieve stable control of the output stimulation intensity. This scheme can realize the adjustment of voltage value (0-100mA).

[0017] 5. It is equipped with a first electrode plate connection monitoring circuit and a second electrode plate connection monitoring circuit, which can quickly determine the connection status of the first electrode plate and the second electrode plate and promptly notify the staff, making it highly functional. Attached Figure Description

[0018] Figure 1 This is a simplified structural framework diagram of Embodiment 1 of the present invention; Figure 2 This is a structural frame diagram of the electrical stimulation device of this utility model; Figure 3 This is a schematic diagram of the circuit structure for power isolation and SPI communication isolation of the first and second isolation chips of this utility model. Figure 4 This is one of the structural schematic diagrams of the isolation stimulation boost power supply circuit of this utility model; Figure 5 This is the second schematic diagram of the isolation stimulation boost power supply circuit of this utility model; Figure 6 This is the third schematic diagram of the isolated stimulation boost power supply circuit of this utility model; Figure 7 This is one of the structural schematic diagrams of the first boost circuit of this utility model; Figure 8 This is the second schematic diagram of the first boost circuit of this utility model; Figure 9 This is one of the structural schematic diagrams of the third boost circuit of this utility model; Figure 10 This is the second schematic diagram of the third boost circuit of this utility model; Figure 11 This is a schematic diagram of the second boost circuit of this utility model; Figure 12 This is a schematic diagram of the fourth boost circuit of this utility model; Figure 13This is a schematic diagram of the structure of the first electrical stimulation generating circuit of this utility model; Figure 14 This is a schematic diagram of the structure of the first electrode plate connected to the monitoring circuit of this utility model; Figure 15 This is a schematic diagram of the structure of the second electrical stimulation generating circuit of this utility model; Figure 16 This is a schematic diagram of the structure of the second electrode plate connected to the monitoring circuit of this utility model; Figure 17 This is a simplified structural framework diagram of Embodiment 2 of this utility model.

[0019] Figure 1-17 The reference numerals in the attached figures are as follows: 1-Terminal device; 2-Electrical stimulation device; 3-Bluetooth receiver; 20-Isolation stimulation boost power supply circuit; 21-First microcontroller; 22-Second microcontroller; 23-Third microcontroller; 24-First isolation chip; 25-Second isolation chip; 26-First electrode; 27-Second electrode; 28-First boost module; 29-Second boost module; 210-Main power supply; 211-First electrical stimulation generating circuit; 212-Second electrical stimulation generating circuit; 213-First electrode connected to monitoring circuit; 214-Second electrode connected to monitoring circuit; 28a-First boost circuit; 28b-Second boost circuit; 29a-Third boost circuit; 29b-Fourth boost circuit. Detailed Implementation

[0020] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0021] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] Please see Figures 1-17This utility model provides a dual-channel electrical stimulation device based on wireless communication according to the following embodiments. This dual-channel electrical stimulation device based on wireless communication belongs to the field of medical device technology and can solve the problems of high cost and inability to achieve synchronous operation without interference in the prior art.

[0023] Example 1 like Figure 1-16 As shown, this utility model provides one type of dual-channel electrical stimulation device based on wireless communication.

[0024] The dual-channel electrostimulation device based on wireless communication includes a terminal device 1 with wireless communication connection and an electrostimulation device 2. The electrostimulation device 2 includes a main power supply 210, a first microcontroller 21, a second microcontroller 22, a third microcontroller 23, a first isolation chip 24, a second isolation chip 25, an isolation stimulation boost power supply circuit 20, a first electrode plate 26, and a second electrode plate 27. The first microcontroller 21 leads out two communication lines, SPI1 and SPI2, which are respectively connected to the two first isolation chips 24 and the second isolation chips 25. The isolated SPI communication lines are then output from the first isolation chips 24 and the second isolation chips 25. Do not connect to the second microcontroller 22 and the third microcontroller 23. The first microcontroller 21 is powered by a battery and controls the main power supply 210 to be turned off via a button switch. After the first microcontroller 21 is powered on, it outputs a high level by controlling the power1 and power2 pins. These two pins are the power supplies for the second microcontroller 22 and the third microcontroller 23, respectively. The second microcontroller 22 is used to control the first electrode 26, and the third microcontroller 23 is used to control the second electrode 27. The input of the isolation stimulation boost power supply circuit 20 is connected to the first microcontroller 21, and the output is connected to the first electrode 26 and the second electrode 27, respectively.

[0025] SPI (Serial Peripheral Interface) is a high-speed, full-duplex, synchronous communication bus primarily used for data exchange between microcontrollers and various peripheral devices. The SPI communication protocol was proposed by Motorola and employs a master-slave architecture, supporting one or more slave devices.

[0026] This invention provides a novel dual-channel electrostimulation device based on wireless communication. The electrostimulation device 2 contains three microcontrollers: a first microcontroller 21 as the master, and second and third microcontrollers 22 and 23 as slave microcontrollers. Communication isolation between the one NRF52832 microcontroller and the two slave NRF52832 microcontrollers is achieved through SPI master-slave communication, overcoming the limitation of existing NRF52832 microcontrollers having only a single serial port. Furthermore, since the first microcontroller 21 is isolated from the second microcontroller 22, and the first microcontroller 21 is isolated from the third microcontroller 23 via a first isolation chip 24 and a second isolation chip 25 respectively, power supply isolation is achieved. Thus, the first isolation chip 24 and the second isolation chip 25 achieve both communication and power supply isolation. Combined with the isolation of the stimulation boost power supply circuit 20, a triple isolation effect is achieved.

[0027] In this embodiment, the first microcontroller 21 is directly connected to the terminal device 1 via Bluetooth wireless communication, enabling wireless remote control. Therefore, the user wearing the electrical stimulation device 2 can move freely without restriction, solving the various inconveniences and limitations associated with stand-alone or wired connections.

[0028] In this embodiment, the first microcontroller 21, the second microcontroller 22 and the third microcontroller 23 are all NRF52832 microcontrollers, and the first isolation chip 24 and the second isolation chip 25 are both CA-IS3741LB isolation chips.

[0029] In this embodiment, the electrical stimulation device 2 further includes a first boost module 28 and a second boost module 29. The input terminal of the first boost module 28 is connected to the output terminal of the isolation stimulation boost power supply circuit 20, and the output terminal is connected to the first electrode plate 26. The input terminal of the second boost module 29 is connected to the output terminal of the isolation stimulation boost power supply circuit 20, and the output terminal is connected to the second electrode plate 27. The first boost module 28 is connected to the second microcontroller 22, and the second boost module 29 is connected to the third microcontroller 23.

[0030] refer to Figures 4-6In this embodiment, the isolated stimulus boost power supply circuit 20 includes a first MOSFET Q3, a second MOSFET Q4, a first filter module (composed of capacitors C3, C4, and inductor L5), a second filter module (composed of capacitors C5, C6, and inductor L6), a third isolation chip U1, a fourth isolation chip U5, a first transformer U2, a second transformer U3, a first voltage regulator chip U7, and a second voltage regulator chip U6. The first microcontroller 21 controls stim_pwr_Ctr to be high, so that the battery voltage passes through the first MOSFET Q3 and then through the first filter module, the third isolation chip U1, and the first transformer U2. After the transformer U2 outputs isolated stimulation boost power supply 1 (LT31_120_1), after passing through the second MOSFET Q4, the second filter module, the fourth isolation chip U5, and the second transformer U2, it outputs isolated stimulation boost power supply 2 (LT31_120_2). Stimulation boost power supply 1 (LT31_120_1) outputs a stable voltage (+3.3V_1) after passing through the first voltage regulator chip U7 to drive the first boost module 28. Stimulation boost power supply 2 (LT31_120_2) outputs a stable voltage (+3.3V_2) after passing through the second voltage regulator chip U6 to drive the second boost module 29.

[0031] Preferably, the third isolation chip U1 is a push-pull isolation power supply chip of model MX6051T, which works in conjunction with the first transformer U2 to form a transformer driver. The fourth isolation chip U5 is a push-pull isolation power supply chip of model MX6051T, which works in conjunction with the second transformer U2 to form a transformer driver. The first transformer U2 and the second transformer U3 are push-pull transformers of model LT31_120. The first voltage regulator chip U7 and the second voltage regulator chip U6 are TPS7A2433DBVR 200mA, 18V, ultra-low IQ, low dropout (LDO) voltage regulator chips with enable function, supporting an input voltage range of 2.4V to 18V and having ultra-low quiescent current (I0). Q ).

[0032] Therefore, by means of the isolation stimulation boost power supply circuit 20, isolation of electrical stimulation with a current range of 0-100mA can be achieved and stable output can be guaranteed.

[0033] refer to Figure 7-11In this embodiment, the first boost module 28 includes a first boost circuit 28a and a second boost circuit 28b, and the second boost module 29 includes a third boost circuit 29a and a fourth boost circuit 29b. When the second microcontroller 22 and the third microcontroller 23 receive the start stimulation command issued by the first microcontroller 21, they control the first boost circuit 28a and the third boost circuit 29a to output a 500kHz PWM waveform, and control the second boost circuit 28b and the fourth boost circuit 29b to output a 32kHz PWM waveform.

[0034] Specifically, when the second microcontroller 22 and the third microcontroller 23 receive the start stimulation command issued by the first microcontroller 21, as follows: Figure 7 As shown, the second microcontroller 22 and the third microcontroller 23 respectively control Trans_control_1 and Trans_control_2 to output PWM waveforms of the first frequency, as follows: Figure 10-11 As shown, the second microcontroller 22 and the third microcontroller 23 control current_ctrl_1 and current_ctrl_2 respectively to output PWM waveforms of the second frequency; The duty cycle of two PWM waveforms with different frequencies is controlled according to the real-time output current to achieve the current boosting function. As a preferred option, the first frequency is higher than the second frequency.

[0035] As a further preferred option, the first frequency is 500KHz, and the second frequency is 32KHz.

[0036] This invention can simultaneously output two PWM waveforms at different frequencies, offering the following advantages: 1. Different physiological effects: Different PWM waveforms at different frequencies produce different physiological effects on neuromuscular function. A 32kHz PWM waveform may primarily induce rhythmic muscle contractions. This frequency is close to certain inherent frequencies of human neuromuscular function, effectively stimulating nerves and triggering muscle contraction responses, thereby achieving the purpose of exercising muscles, enhancing muscle strength, or improving muscle function. A 500kHz PWM waveform, on the other hand, may have deeper tissue penetration capabilities, acting on deeper neuromuscular tissues or having specific effects on ion channels in nerve cell membranes, helping to promote nerve repair and regeneration, or regulating muscle metabolism. 2. Synergistic effect: Using the two waveforms simultaneously can exert a synergistic effect. The 32kHz waveform induces significant muscle contraction, producing mechanical movement, while the 500kHz waveform regulates neuromuscular tissue at the cellular and molecular level, improving its internal physiological environment and functional state. The combination of the two may more comprehensively promote the recovery and improvement of neuromuscular function than using a single frequency. For example, in treating certain nerve injuries or muscle atrophy, a 32kHz waveform helps restore muscle function, while a 500kHz waveform assists in repairing damaged nerve tissue, both contributing to improvement. 3. Reducing Adaptation: The human neuromuscular system may adapt to electrical stimulation of a single frequency, leading to a gradual weakening of the stimulation effect. Using two different frequencies of PWM waveforms simultaneously can reduce this adaptation. Neuromuscular tissue has different response mechanisms to stimulation at different frequencies; alternating or applying two frequencies of stimulation simultaneously allows the neuromuscular system to maintain sensitivity to stimulation, thus preserving better therapeutic effects.

[0037] refer to Figures 7-10 In one embodiment of this utility model, the first boost circuit 28a includes a third transformer T1, and the third boost circuit 29a includes a fourth transformer T2. When the third transformer T1 and the fourth transformer T2 boost the voltage, the voltage levels of the Power_Trans_1 pin of the first boost circuit 28a and the Power_Trans_2 pin of the third boost circuit 29a also increase. By detecting the values ​​of Power_ADC_1 (after filtering Power_Trans_1) and Power_ADC_2 (after filtering Power_Trans_2), the boost voltage level is determined, thereby controlling the start and stop of the 500kHz PWM waveform output by the first boost circuit 28a and the third boost circuit 29a. This prevents the third transformer T1 and the fourth transformer T2 from over-boosting and damaging the devices, and by controlling the duty cycle of the first frequency PWM waveform, a stable stimulation intensity is achieved. Therefore, this solution can achieve voltage adjustment of the stimulation current within the range of 0-100mA.

[0038] refer to Figures 12-15 In this embodiment, the electrical stimulation device 2 further includes a first electrical stimulation generating circuit 211 and a second electrical stimulation generating circuit 212. The input terminal of the first electrical stimulation generating circuit 211 is connected to Power_Trans_1 of the first boost circuit 28a and CTLR_1 and CTLR_2 of the second boost circuit 28b, and the output terminal is connected to the two electrodes of the first electrode plate 26. The input terminal of the second electrical stimulation generating circuit 212 is connected to Power_Trans_2 of the third boost circuit 29a and CTLR_3 and CTLR_4 of the fourth boost circuit 29b, and the output terminal is connected to the two electrodes of the second electrode plate 27.

[0039] Preferably, the first electrical stimulation generating circuit 211 and the second electrical stimulation generating circuit 212 are provided with complementary push-pull output stages (such as NPN+PNP pairing). Specifically, in this embodiment, the transistors in the first electrical stimulation generating circuit 211 and the second electrical stimulation generating circuit 212 are MMBTA92 PNP transistors and MMBTA42 NPN transistors. The pulse waveform generated by this circuit is a bidirectional symmetrical wave, which has the advantages of stable circuit structure, good symmetry and high efficiency.

[0040] refer to Figure 7-14 By controlling the levels of WF1 and WF2, the CTLR_1 and CTLR_2 of the second boost circuit 28b and the Power_Trans_1 of the first boost circuit 28a are connected to the first electrical stimulation generating circuit 211, and finally the final stimulation waveform is output from OUT_A_1 and OUT_B_1. WF1 and WF2 control the pulse width and frequency of the first electrical stimulation circuit 211. When WF1 and WF2 have the same pulse width and frequency, the waveform and amplitude are the same, and the phase difference is 50µs.

[0041] The CTLR_1 and CTLR_2 of the second boost circuit 28b and the Power_Trans_1 of the first boost circuit 28a control the stimulation intensity of the first electrical stimulation generating circuit 211.

[0042] By controlling the levels of WF3 and WF4, the CTLR_3 and CTLR_4 of the fourth boost circuit 29b and the Power_Trans_2 of the third boost circuit 29a are connected to the second electrical stimulation generating circuit 212. Finally, the final stimulation waveform is output from OUT_A_2 and OUT_B_2.

[0043] WF3 and WF4 control the pulse width and frequency of the second electrical stimulation generating circuit 212. Under the same pulse width and frequency, WF3 and WF4 have the same waveform and amplitude, but the phase difference is 50µs.

[0044] The CTLR_3 and CTLR_4 of the fourth boost circuit 29b and the Power_Trans_2 of the third boost circuit 29a control the stimulation intensity of the second electrical stimulation generating circuit 212.

[0045] refer to Figure 13 and Figure 15 In this embodiment, the electrical stimulation device 2 further includes a first electrode connection monitoring circuit 213 and a second electrode connection monitoring circuit 214. The input terminal of the first electrode connection monitoring circuit 213 is connected to the first electrical stimulation generating circuit 211, and the input terminal of the second electrode connection monitoring circuit 214 is connected to the second electrical stimulation generating circuit 212. The voltage value of the output terminal TL_ADC_1 of the first electrode connection monitoring circuit 213 during the detection period is used to determine whether the first electrode 26 has detached, and the voltage value of the output terminal TL_ADC_2 of the second electrode connection monitoring circuit 214 during the stimulation period is used to determine whether the second electrode 27 has detached. Therefore, when the electrical stimulation device 2 outputs electrical stimulation, if the first electrode 26 and the second electrode 27 are properly connected, there will be a voltage change at TL_ADC, and the voltage value will increase with the increase of the output current value. When the TL_ADC_1 voltage value exceeds 100mV during the stimulation cycle, it indicates that the first electrode 26 is connected correctly. If the voltage value does not exceed 100mV, it indicates that the first electrode 26 has detached. Similarly, when the TL_ADC_2 voltage value exceeds 100mV during the stimulation cycle, it indicates that the second electrode 27 is connected correctly. If the voltage value does not exceed 100mV, it indicates that the second electrode 27 has detached. If detachment occurs, staff can be quickly alerted to reconnect it. Therefore, through... Figure 13 and Figure 15 The first electrode plate connection monitoring circuit 213 and the second electrode plate connection monitoring circuit 214 shown monitor the status values ​​of pins TL_ADC_1 and TL_ADC_2 during the monitoring period. This circuit can quickly determine the connection status of the first electrode plate 26 and the second electrode plate 27 and promptly alert the staff.

[0046] refer to Figure 16 The figure shows the voltage state at TL_ADC when the electrode connection is normal, as detected by an oscilloscope.

[0047] Preferably, the first electrode plate connected to the monitoring circuit 213 and the second electrode plate connected to the monitoring circuit 214 can be composed of a filter circuit, an amplifier circuit, a rectifier circuit, etc.

[0048] Example 2 like Figure 17 As shown, this utility model provides another type of dual-channel electrical stimulation device based on wireless communication.

[0049] like Figure 17 As shown, the structure of the dual-channel electrical stimulation device based on wireless communication in this embodiment is basically the same as that in embodiment 1, except that the communication method between the terminal device 1 and the electrical stimulation device 2 is different.

[0050] The dual-channel electrical stimulation device based on wireless communication in this embodiment also includes a Bluetooth receiver 3. The terminal device 1 and the Bluetooth receiver 3 communicate via a serial port. The Bluetooth receiver 3 is connected to the first microcontroller 21 via Bluetooth communication. The Bluetooth receiver 3 sends the data received from the terminal device 1 to the first microcontroller 21 via wireless Bluetooth communication and sends the data received wirelessly from the first microcontroller 21 back to the terminal device 1 via a serial port. Therefore, the user wearing the electrical stimulation device 2 can move freely without restriction, solving the various inconveniences and limitations caused by stand-alone or wired devices.

[0051] As described above, the dual-channel electrical stimulation device based on wireless communication of this invention has at least the following advantages over the prior art: 1. This utility model provides a novel dual-channel electrical stimulation device based on wireless communication. The electrical stimulation device 2 of this device contains three microcontrollers: a first microcontroller 21 is the master microcontroller, and the second and third microcontrollers 22 and 23 are slave microcontrollers. Through SPI master-slave communication, communication isolation between the one NRF52832 microcontroller and the two slave NRF52832 microcontrollers is achieved, overcoming the limitation of existing NRF52832 microcontrollers having only a single serial port. Furthermore, since the first microcontroller 21 is isolated from the second microcontroller 22, and the first microcontroller 21 is isolated from the third microcontroller 23 via a first isolation chip 24 and a second isolation chip 25 respectively, power isolation is achieved. Thus, the first isolation chip 24 and the second isolation chip 25 achieve both communication isolation and power isolation. 2. A first boost module 28 is provided between the first microcontroller 21 and the first electrode 26, and a second boost module 29 is provided between the first microcontroller 21 and the second electrode 27. The first boost module 28 includes a first boost circuit 28a and a second boost circuit 28b, and the second boost module 29 includes a third boost circuit 29a and a fourth boost circuit 29b. When the second microcontroller 22 and the third microcontroller 23 receive the start stimulation command issued by the first microcontroller 21, the second microcontroller 22 controls the first boost circuit 28a and the third boost circuit 29a to output a 500kHz PWM waveform, and the third microcontroller 23 controls the second boost circuit 28b and the fourth boost circuit 29b to output a 32kHz PWM waveform. This invention can output PWM waveforms of two frequencies, 500kHz and 32kHz, simultaneously, and has many advantages such as good stimulation effect, strong applicability, and fast adaptation speed. 3. An isolation stimulation boost power supply circuit 20 is provided between the first boost module 28, the second boost module 29 and the first microcontroller 21, which can realize the isolation of the stimulation boost power supply. Combined with the first isolation chip 24 and the second isolation chip 25, the communication isolation and power isolation effects are achieved, so that this utility model can achieve the technical effect of multiple isolation. 4. It can control the start and stop of the 500KHz PWM waveform output by the first boost circuit 28a and the third boost circuit 29a, thereby preventing the transformer from being damaged by excessive voltage. Furthermore, by controlling the duty cycle of the 500KHz PWM waveform, it can achieve stable control of the output stimulation intensity. This scheme can achieve voltage adjustment of (0-100mA).

[0052] 5. It is equipped with a first electrode plate connection monitoring circuit 213 and a second electrode plate connection monitoring circuit 214, which can quickly determine the connection status of the first electrode plate 26 and the second electrode plate 27 and promptly notify the staff, making it highly functional.

[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A dual-channel electrical stimulation device based on wireless communication, characterized in that, The device includes a terminal device (1) and an electrical stimulation device (2). The electrical stimulation device (2) includes a first microcontroller (21), a second microcontroller (22), a third microcontroller (23), a first isolation chip (24), a second isolation chip (25), a first electrode plate (26), and a second electrode plate (27). The first microcontroller (21) is connected to the first isolation chip (24) and the second isolation chip (25). The first isolation chip (24) is connected to the second microcontroller (22). The second isolation chip (25) is connected to the third microcontroller (23). The second microcontroller (22) is electrically connected to the first electrode plate (26). The third microcontroller (23) is electrically connected to the second electrode plate (27). The terminal device (1) is wirelessly connected to the first microcontroller (21).

2. The dual-channel electrical stimulation device based on wireless communication according to claim 1, characterized in that, It also includes a Bluetooth receiver (3), through which the terminal device (1) and the Bluetooth receiver (3) communicate via a serial port. The Bluetooth receiver (3) is connected to the first microcontroller (21) via Bluetooth communication. The Bluetooth receiver (3) sends the data received from the terminal device (1) to the first microcontroller (21) via wireless Bluetooth communication and sends the data returned by the first microcontroller (21) via the serial port back to the terminal device (1).

3. The dual-channel electrical stimulation device based on wireless communication according to claim 1, characterized in that, The electrical stimulation device (2) further includes a first boost module (28) and a second boost module (29) connected to the first microcontroller (21). The first boost module (28) is connected to the second microcontroller (22) and the first electrode (26) respectively, and the second boost module (29) is connected to the third microcontroller (23) and the second electrode (27) respectively.

4. The dual-channel electrical stimulation device based on wireless communication according to claim 3, characterized in that, The electrical stimulation device (2) further includes an isolation stimulation boost power supply circuit (20), the input terminal of which is connected to the first microcontroller (21), and the input terminals of the first boost module (28) and the second boost module (29) are both connected to the output terminal of the isolation stimulation boost power supply circuit (20).

5. The dual-channel electrical stimulation device based on wireless communication according to claim 4, characterized in that, The electrostimulation device (2) also includes a main power supply (210). The isolated stimulation boost power supply circuit (20) includes a first MOS transistor, a second MOS transistor, a first filter module, a second filter module, a third isolation chip, a fourth isolation chip, a first transformer, a second transformer, a first voltage regulator chip, and a second voltage regulator chip. The first microcontroller (21) controls stim_pwr_Ctr to be high level so that the voltage of the main power supply (210) passes through the first MOS transistor, the first filter module, the third isolation chip, and the first transformer to output the isolated stimulation boost power supply 1. After passing through the second MOS transistor, the second filter module, the fourth isolation chip, and the second transformer, the isolated stimulation boost power supply 2 is output. The stimulation boost power supply 1 outputs a stable voltage after passing through the first voltage regulator chip to drive the first boost module (28). The stimulation boost power supply 2 outputs a stable voltage after passing through the second voltage regulator chip to drive the second boost module (29).

6. The dual-channel electrical stimulation device based on wireless communication according to claim 3, characterized in that, The first boost module (28) includes a first boost circuit (28a) and a second boost circuit (28b). The second boost module (29) includes a third boost circuit (29a) and a fourth boost circuit (29b). When the second microcontroller (22) and the third microcontroller (23) receive the start stimulation command issued by the first microcontroller (21), they control the first boost circuit (28a) and the third boost circuit (29a) to output a PWM waveform of a first frequency, and control the second boost circuit (28b) and the fourth boost circuit (29b) to output a PWM waveform of a second frequency.

7. The dual-channel electrical stimulation device based on wireless communication according to claim 6, characterized in that, The first boost circuit (28a) includes a third transformer, and the third boost circuit (29a) includes a fourth transformer. When the third transformer and the fourth transformer boost the voltage, the voltage levels of the Power_Trans_1 pin of the first boost circuit (28a) and the Power_Trans_2 pin of the third boost circuit (29a) will also increase. The boost voltage level is determined by detecting the values ​​of Power_ADC_1 after filtering Power_Trans_1 and Power_ADC_2 after filtering Power_Trans_2, thereby controlling the start and stop of the first frequency PWM waveform output by the first boost circuit (28a) and the third boost circuit (29a).

8. The dual-channel electrical stimulation device based on wireless communication according to claim 6 or 7, characterized in that, The electrical stimulation device (2) further includes a first electrical stimulation generating circuit (211) and a second electrical stimulation generating circuit (212). The input terminal of the first electrical stimulation generating circuit (211) is connected to the first boost circuit (28a) and the second boost circuit (28b), and the output terminal is connected to the two electrodes of the first electrode plate (26). The input terminal of the second electrical stimulation generating circuit (212) is connected to the third boost circuit (29a) and the fourth boost circuit (29b), and the output terminal is connected to the two electrodes of the second electrode plate (27).

9. The dual-channel electrical stimulation device based on wireless communication according to claim 8, characterized in that, The electrical stimulation device (2) further includes a first electrode plate connection monitoring circuit (213) for detecting the connection status of the first electrode plate (26) and a second electrode plate connection monitoring circuit (214) for detecting the connection status of the second electrode plate (27).

10. The dual-channel electrical stimulation device based on wireless communication according to claim 9, characterized in that, The input terminal of the first electrode connection monitoring circuit (213) is connected to the first electrical stimulation generating circuit (211), and the input terminal of the second electrode connection monitoring circuit (214) is connected to the second electrical stimulation generating circuit (212). The voltage value of the output terminal TL_ADC_1 of the first electrode connection monitoring circuit (213) during the stimulation cycle is detected to determine whether the first electrode (26) has fallen off, and the voltage value of the output terminal TL_ADC_2 of the second electrode connection monitoring circuit (214) during the stimulation cycle is detected to determine whether the second electrode (27) has fallen off.

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