Modulation waveform output control device and electric therapeutic apparatus

Abstract

The utility model discloses a modulation waveform output control device, which is applied to an electric therapeutic apparatus and comprises a main controller, a signal amplitude adjusting circuit, a signal lifting and synthesizing circuit, a low-pass filter circuit, a driving amplification circuit and a boost output circuit, and the low-pass filter circuit, the driving amplification circuit and the boost output circuit are connected in sequence. The low-pass filter circuit is connected with the signal lifting and synthesizing circuit, and the boost output circuit is connected with a therapeutic electrode of the electric therapeutic apparatus. According to the modulation waveform output control device of the utility model, through arranging the signal amplitude adjusting circuit and the signal lifting and synthesizing circuit which are connected with the main controller, amplitude adjustment is carried out on a modulation signal output by the main controller, then lifting is carried out, and the modulation signal is synthesized with a carrier wave signal of the main controller to obtain an umbrella-shaped wave control signal; and after filtering and driving amplification, boosting and outputting are carried out, so that a treatment electrode of the electric therapeutic apparatus outputs umbrella-shaped modulation waves. The utility model also discloses an electric therapeutic apparatus.

Description

Technical Field

[0001] This utility model relates to the field of therapeutic instrument technology, and in particular to a modulated waveform output control device and an electrotherapy instrument. Background Technology

[0002] Electrotherapy devices are based on the principle of bioelectric stimulation, integrating knowledge from multiple disciplines such as physics, biology, electronic engineering, and clinical medicine. They aim to improve and treat various diseases non-invasively. The electrical current in electrotherapy devices can penetrate the skin and soft tissues, directly acting on deep muscles and nerves to produce a series of physiological effects, including analgesia, relief of muscle spasms, promotion of blood circulation, accelerated absorption of inflammation, and promotion of tissue repair. However, the waveform output of existing electrotherapy devices is unstable. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a modulation waveform output control device and an electrotherapy device to output a stable and reliable modulation waveform.

[0004] In a first aspect, this utility model provides a modulated waveform output control device for use in an electrotherapy device, comprising a main controller, a signal amplitude adjustment circuit, a signal boosting and synthesis circuit, a low-pass filter circuit, a drive amplifier circuit, and a boost output circuit. The signal amplitude adjustment circuit is connected to the main controller, the signal boosting and synthesis circuit is connected to both the main controller and the signal amplitude adjustment circuit, the low-pass filter circuit is connected to both the signal boosting and synthesis circuit and the drive amplifier circuit, and the output terminal of the drive amplifier circuit is connected to the treatment electrode of the electrotherapy device via the boost output circuit.

[0005] Secondly, this utility model provides an electrotherapy device, including the above-mentioned modulation waveform output control device and treatment electrode, wherein the modulation waveform output control device is connected to the treatment electrode.

[0006] The beneficial technical effects of this utility model are as follows: The modulation waveform output control device of this utility model, by setting a signal amplitude adjustment circuit and a signal boosting and synthesis circuit connected to the main controller, adjusts the amplitude of the modulation signal output by the main controller using the signal amplitude adjustment circuit, and then boosts the modulated signal with the adjusted amplitude using the signal boosting and synthesis circuit, and synthesizes it with the carrier signal of the main controller to generate a bidirectional square wave, thereby obtaining the desired waveform control signal. The waveform is stable and controllable. By setting a low-pass filter circuit to filter the desired waveform control signal, overshoot is prevented. By setting a drive amplifier circuit and a boost output circuit to drive and amplify the filtered desired waveform control signal and boost it for output, the output can be adjusted according to the treatment intensity, so that the treatment electrodes of the electrotherapy device can output the corresponding modulated wave of the desired waveform, which can enhance the treatment effect and adapt to different treatment needs. Moreover, the amplitude of the output waveform is variable, which can avoid the human body adapting to a single fixed amplitude and improve the treatment effect. The electrotherapy device of this utility model also has the above functions. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 A schematic diagram of the frame of the modulation waveform output control device provided in the embodiment of this utility model;

[0009] Figure 2 A circuit diagram of the signal amplitude adjustment circuit of the modulation waveform output control device provided in this embodiment of the utility model;

[0010] Figure 3 A circuit diagram of the signal boosting and synthesis circuit of the modulation waveform output control device provided in this embodiment of the utility model;

[0011] Figure 4 A circuit diagram of the low-pass filter circuit of the modulation waveform output control device provided in this embodiment of the utility model;

[0012] Figure 5 A circuit diagram of the boost output circuit of the modulation waveform output control device provided in this embodiment of the utility model;

[0013] Figure 6 A schematic diagram of the waveform output by the modulation waveform output control device provided in this embodiment of the utility model. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 , Figure 1 This is a schematic diagram of the framework of the modulation waveform output control device provided in an embodiment of the present invention. The modulation waveform output control device 10 is applied to an electrotherapy device and includes a main controller 11, a signal amplitude adjustment circuit 12, a signal boosting and synthesis circuit 13, a low-pass filter circuit 14, a drive amplifier circuit 15, and a boost output circuit 16. The signal amplitude adjustment circuit 12 is connected to the main controller 11. The main controller 11 can perform digital-to-analog conversion on the modulation signal and output it to the signal amplitude adjustment circuit 12. Therefore, the modulation signal output by the main controller 11 to the signal amplitude adjustment circuit 12 is an analog signal. The signal amplitude adjustment circuit 12 modulates the modulation signal output by the main controller 11. The signal amplitude adjustment control is performed to adjust the amplitude of the modulation signal. The signal boosting and synthesis circuit 13 is connected to the main controller 11 and the signal amplitude adjustment circuit 12 to boost the modulation signal after the amplitude is adjusted by the signal amplitude adjustment circuit 12 and synthesize it with the carrier signal output by the main controller 11 to obtain the desired waveform control signal. The low-pass filter circuit 14 is connected to the signal boosting and synthesis circuit 13 and the drive amplifier circuit 15 to filter the desired waveform control signal and output it to the drive amplifier circuit 15. The output terminal of the drive amplifier circuit 15 is connected to the treatment electrode of the electrotherapy device through the boost output circuit 16.

[0016] The required waveform control signal refers to the control signal of the waveform of the required modulation signal. The main controller 11 can be an MCU. The modulation waveform output control device 10 is configured with a signal amplitude adjustment circuit 12 and a signal boosting and synthesis circuit 13 connected to the main controller 11. The signal amplitude adjustment circuit 12 adjusts the amplitude of the modulation signal output by the main controller 11, and the signal boosting and synthesis circuit 13 boosts the modulated signal after the amplitude adjustment and synthesizes it with the carrier signal of the main controller 11 to generate a bidirectional square wave to obtain the required waveform control signal. The waveform is stable and controllable. The required waveform control signal is filtered by a low-pass filter circuit 14 to prevent overshoot. The filtered required waveform control signal is amplified and boosted by a drive amplifier circuit 15 and a boost output circuit 16 to drive and amplify the required waveform control signal and output it. The output can be adjusted according to the treatment intensity, so that the treatment electrode of the electrotherapy device can output the corresponding modulated wave of the required waveform, which can enhance the treatment effect and adapt to different treatment needs. Moreover, the amplitude of the output waveform is variable, which can avoid the human body from adapting to a single fixed amplitude and improve the treatment effect.

[0017] Combination Figure 2Specifically, in this embodiment, the signal amplitude adjustment circuit 12 includes a first operational amplifier OP1, a digital potentiometer U1, and a second operational amplifier OP2. The non-inverting input of the first operational amplifier OP1 is connected to the other end of a third resistor R103 connected to the digital-to-analog converter pin DAC1 of the main controller 11, and the other end of a second resistor R102 connected to the first power supply voltage. The inverting input of the first operational amplifier OP1 is connected to ground through a seventh resistor R107. The inverting input of the first operational amplifier OP1 is connected to the output of the first operational amplifier OP1 through an eighth resistor R108. The output of the first operational amplifier OP1 is connected to the first input A of the digital potentiometer U1. The second input B of the digital potentiometer U1 is connected to the first power supply voltage. The serial input of the digital potentiometer U1... The clock input terminal CLK is connected to the clock pin USART_CK_Strength of the main controller 11. The serial data input terminal SDI of the digital potentiometer U1 is connected to the signal transmission pin USART_TX_Strength of the main controller 11. The chip select input terminal CS of the digital potentiometer U1 is connected to the channel pin IO_StrengthCH1 of the main controller 11. The power supply voltage terminal VDD of the digital potentiometer U1 is connected to the second power supply voltage. The output terminal W of the digital potentiometer U1 is connected to the non-inverting input terminal of the second operational amplifier OP2. The inverting input terminal of the second operational amplifier OP2 is connected to the output terminal of the second operational amplifier OP2. The output terminal of the second operational amplifier OP2 serves as the output terminal of the signal amplitude adjustment circuit 12, which is connected to the signal boosting and synthesis circuit 13. In this circuit, the chip select input CS of the digital potentiometer U1 is active low. The signal amplitude adjustment circuit 12 can output amplitude control data, which can be denoted as REF1. The amplitude control data can be transmitted via SPI (Serial Peripheral Interface). The model of the digital potentiometer U1 can be AD5160BRJZ10. The digital potentiometer U1 is controlled by the main controller 11 via SPI communication. The main controller 11 transmits amplitude control data between 0 and 255 to the digital potentiometer U1 to control the changes between the various pins of the digital potentiometer U1, thereby achieving the purpose of controlling the amplitude change. The first power supply voltage is a 2.5V analog power supply voltage, and the second power supply voltage is a 5V digital power supply voltage.

[0018] Combination Figure 3Specifically, in this embodiment, the signal boosting and synthesis circuit 13 includes an inverting follower circuit 131 and an analog switch U2. The signal amplitude adjustment circuit 12 is connected to the analog switch U2 through the inverting follower circuit 131. The input pin IN of the analog switch U2 is connected to the PWM carrier signal pin PWM_Corrier1 of the main controller 11. The positive voltage pin V+ of the analog switch U2 is connected to the second power supply voltage. The common pin COM of the analog switch U2 serves as the output terminal of the signal boosting and synthesis circuit 13, and is connected to the low-pass filter circuit 14. The inverting follower circuit 131 boosts the amplitude-adjusted modulation signal, and the analog switch U2 synthesizes the boosted modulation signal with the carrier signal output by the main controller 11 to generate a bidirectional square wave, thus obtaining the desired waveform control signal. The analog switch U2 can be an RS2057XC6, and the second power supply voltage is a 5V digital power supply voltage.

[0019] Specifically, in this embodiment, the inverting follower circuit 131 includes a third operational amplifier OP3 and a variable resistor RS101. The non-inverting input of the third operational amplifier OP3 is connected to the first supply voltage. The inverting input of the third operational amplifier OP3 is connected to the output of the signal amplitude adjustment circuit 12 through a fourth resistor R104. The output of the signal amplitude adjustment circuit 12 is connected to the inverting input of the third operational amplifier OP3 through a tenth resistor R110 and the variable resistor RS101 connected in series. The inverting input of the third operational amplifier OP3 is connected to the output of the third operational amplifier OP3 through an eleventh resistor R111. The output of the third operational amplifier OP3 is connected to the normally open pin NO of the analog switch U2. The output of the signal amplitude adjustment circuit 12 is connected to the normally closed pin NC of the analog switch U2. The output terminal of the third operational amplifier OP3 is connected to the non-inverting input terminal of the third operational amplifier OP3 through a connecting resistor R101. One end of the connecting resistor R101 is electrically connected between the first supply voltage and the non-inverting input terminal of the third operational amplifier OP3. The first supply voltage is a 2.5V analog power supply voltage.

[0020] Preferably, the common pin of the analog switch U2 can also be connected to the low-pass filter circuit 14 via a second analog switch.

[0021] Combination Figure 4Specifically, in this embodiment, the low-pass filter circuit 14 includes a fourth operational amplifier OP4, a fifth resistor R105, and a fifth capacitor C105. The output terminal of the signal boosting and synthesis circuit 13 is connected to the non-inverting input terminal of the fourth operational amplifier OP4 through the fifth resistor R105. One end of the fifth capacitor C105 is grounded, and the other end of the fifth capacitor C105 is electrically connected between the fifth resistor R105 and the non-inverting input terminal of the fourth operational amplifier OP4. The inverting input terminal of the fourth operational amplifier OP4 is connected to its output terminal. The low-pass filter can limit the shape of the square wave edge and suppress overshoot in the output signal within a single cycle.

[0022] Specifically, in this embodiment, a sixth resistor R106 is electrically connected between the fifth resistor R105 and the non-inverting input terminal of the fourth operational amplifier OP4. The other end of the fifth capacitor C105 is electrically connected between the fifth resistor R105 and the sixth resistor R106. A sixth capacitor C106 with one end grounded is electrically connected between the sixth resistor R106 and the non-inverting input terminal of the fourth operational amplifier OP4. The output terminal of the fourth operational amplifier OP4 is connected to one end of the first capacitor C101, and the other end of the first capacitor C101 is electrically connected between the fifth resistor R105 and the sixth resistor R106.

[0023] Combination Figure 5 Specifically, in this embodiment, the drive amplifier circuit 15 includes a power amplifier, and the boost output circuit 16 includes a first transformer T201. The output pin of the power amplifier is connected to the primary winding of the first transformer T201, and the two ends of the secondary winding of the first transformer T201 are respectively connected to the two ends of the treatment electrodes of the electrotherapy device. Preferably, the power amplifier is a TPA3110D2 amplifier. Using a power amplifier allows for reliable signal amplification, smooth waveform processing, and easy control. By setting the boost output circuit 16, the output magnitude can be adjusted according to the treatment intensity, and the boost output circuit 16 includes the first transformer T201 to achieve isolated amplification.

[0024] Specifically, in this embodiment, the boost output circuit 16 further includes a second transformer T202. A 31st resistor R231 is electrically connected between the two ends of the secondary winding of the first transformer T201. The second end of the secondary winding of the first transformer T201 is connected to one polarity pin of the treatment electrode of the electrotherapy device through a fuse F201. The first end of the secondary winding of the first transformer T201 is connected to the other polarity pin of the treatment electrode of the electrotherapy device through the primary winding of the second transformer T202. The first end of the secondary winding of the second transformer T202 is grounded. The second end of the secondary winding of the second transformer T202 serves as the current output terminal I3 of the boost output circuit 16 and is connected to the main controller 11 so that the main controller 11 can collect the output current of the boost output circuit 16. It can determine open circuit or short circuit based on the collected output current and use the collected output current as feedback on the treatment output intensity to perform self-testing of its own circuit, thereby detecting the output status for subsequent protection processing.

[0025] Preferably, the second end of the secondary winding of the first transformer T201 is connected to the fuse F201 via the first inductor LB201. The two ends of the first inductor LB201 can be connected to the two ends of a resistor connected in parallel with the first inductor LB201. Thus, the second end of the secondary winding of the first transformer T201 can be connected to the fuse F201 via this resistor. The first end of the primary winding of the second transformer T202 is connected to the first end of the secondary winding of the first transformer T201. The second end of the primary winding of the second transformer T201 can be connected to the other polarity pin of the treatment electrode of the electrotherapy device via the second inductor LB202 and the second fuse F202. The two ends of the second inductor LB202 can be connected to the two ends of a resistor connected in parallel with the second inductor LB202. Thus, the second end of the primary winding of the second transformer T202 can be connected to the second fuse F202 via this resistor.

[0026] The waveform diagram output by the modulation waveform output control device can be shown as follows: Figure 6As shown, the modulation waveform can be umbrella-shaped, starting from a voltage value of 0, outputting along the circular trajectory in both positive and negative directions to the maximum positive voltage and the minimum negative voltage, respectively, and then gradually changing back to 0 from the maximum positive voltage and the minimum negative voltage along the circular trajectory. The modulation signal output by the main controller to the signal amplitude adjustment circuit can be calculated based on the waveform image corresponding to the desired waveform control signal. Specifically, the waveform image corresponding to the desired waveform control signal is divided into different regions according to different trends, such as upward and downward trends. Then, the waveform image in each region is divided into several equal parts according to the horizontal axis. The vertical axis corresponding to the waveform image in each part is obtained as the control data parameter. The control data parameters of all equal parts in all regions are merged and then converted from digital to analog by the main controller to obtain the corresponding modulation signal.

[0027] Specifically, this utility model also discloses an electrotherapy device, which includes the aforementioned modulated waveform output control device and a treatment electrode. The modulated waveform output control device is connected to the treatment electrode. The treatment electrode can be a patch electrode or an adsorption electrode. The treatment electrode may include a treatment electrode terminal and a treatment electrode end, with the treatment electrode end connected to the output terminal of a boost output circuit via the treatment electrode terminal. The modulated waveform output control device can be located on the control circuit board of the electrotherapy device. The control circuit board has a terminal interface, and the output terminal of the boost output circuit can be connected to the treatment electrode terminal via the corresponding terminal interface. The treatment electrode end is used to contact the human body for treatment.

[0028] In summary, the modulation waveform output control device of this invention, by setting up a signal amplitude adjustment circuit and a signal boosting and synthesis circuit connected to the main controller, adjusts the amplitude of the modulation signal output by the main controller using the signal amplitude adjustment circuit, and then boosts the amplitude-adjusted modulation signal using the signal boosting and synthesis circuit, synthesizing it with the carrier signal of the main controller to generate a bidirectional square wave, thereby obtaining the desired waveform control signal. The waveform is stable and controllable. A low-pass filter circuit is set up to filter the desired waveform control signal to prevent signal overshoot. A drive amplifier circuit and a boost output circuit are set up to drive and amplify the filtered desired waveform control signal and boost it for output. The output can be adjusted according to the treatment intensity, so that the treatment electrodes of the electrotherapy device can output the corresponding modulated wave of the desired waveform, which can enhance the treatment effect and adapt to different treatment needs. Moreover, the amplitude of the output waveform is variable, which can avoid the human body's adaptation to a single fixed amplitude and improve the treatment effect. The electrotherapy device of this invention also has the above-mentioned functions.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A modulated waveform output control device, characterized in that, The device is used in electrotherapy and includes a main controller, a signal amplitude adjustment circuit, a signal boosting and synthesis circuit, a low-pass filter circuit, a drive amplifier circuit, and a boost output circuit. The signal amplitude adjustment circuit is connected to the main controller, the signal boosting and synthesis circuit is connected to both the main controller and the signal amplitude adjustment circuit, the low-pass filter circuit is connected to both the signal boosting and synthesis circuit and the drive amplifier circuit, and the output of the drive amplifier circuit is connected to the treatment electrode of the electrotherapy device through the boost output circuit.

2. The modulation waveform output control device according to claim 1, characterized in that, The signal amplitude adjustment circuit includes a first operational amplifier, a digital potentiometer, and a second operational amplifier. The non-inverting input of the first operational amplifier is connected to the other end of a third resistor (one end of which is connected to the digital-to-analog conversion pin of the main controller) and the other end of a second resistor (one end of which is connected to the first power supply voltage). The inverting input of the first operational amplifier is connected to ground via a seventh resistor. The inverting input of the first operational amplifier is connected to the output of the first operational amplifier via an eighth resistor. The output of the first operational amplifier is connected to the first input of the digital potentiometer. The second input of the digital potentiometer is connected to the first power supply voltage. The serial clock input of the digital potentiometer is connected to the clock pin of the main controller. The serial data input of the digital potentiometer is connected to the signal transmission pin of the main controller. The chip select input of the digital potentiometer is connected to the channel pin of the main controller. The power supply voltage of the digital potentiometer is connected to the second power supply voltage. The output of the digital potentiometer is connected to the non-inverting input of the second operational amplifier. The inverting input of the second operational amplifier is connected to the output of the second operational amplifier. The output of the second operational amplifier is connected to the signal boosting and combining circuit.

3. The modulation waveform output control device according to claim 1, characterized in that, The signal boosting and synthesis circuit includes an inverting follower circuit and an analog switch. The signal amplitude adjustment circuit is connected to the analog switch through the inverting follower circuit. The input pin of the analog switch is connected to the PWM carrier signal pin of the main controller. The positive voltage pin of the analog switch is connected to the second power supply voltage. The common pin of the analog switch is connected to the low-pass filter circuit.

4. The modulation waveform output control device according to claim 3, characterized in that, The inverting follower circuit includes a third operational amplifier and a variable resistor. The non-inverting input of the third operational amplifier is connected to a first supply voltage. The inverting input of the third operational amplifier is connected to the output of the signal amplitude adjustment circuit through a fourth resistor. The output of the signal amplitude adjustment circuit is connected to the inverting input of the third operational amplifier through a tenth resistor and the variable resistor connected in series. The inverting input of the third operational amplifier is connected to the output of the third operational amplifier through an eleventh resistor. The output of the third operational amplifier is connected to the normally open pin of the analog switch. The output of the signal amplitude adjustment circuit is connected to the normally closed pin of the analog switch.

5. The modulation waveform output control device according to claim 1, characterized in that, The low-pass filter circuit includes a fourth operational amplifier, a fifth resistor, and a fifth capacitor. The output terminal of the signal boosting and synthesis circuit is connected to the non-inverting input terminal of the fourth operational amplifier through the fifth resistor. One end of the fifth capacitor is grounded, and the other end of the fifth capacitor is electrically connected between the fifth resistor and the non-inverting input terminal of the fourth operational amplifier. The inverting input terminal of the fourth operational amplifier is connected to the output terminal of the fourth operational amplifier.

6. The modulation waveform output control device according to claim 5, characterized in that, A sixth resistor is electrically connected between the fifth resistor and the non-inverting input terminal of the fourth operational amplifier. The other end of the fifth capacitor is electrically connected between the fifth resistor and the sixth resistor. A sixth capacitor with one end grounded is electrically connected between the sixth resistor and the non-inverting input terminal of the fourth operational amplifier. The output terminal of the fourth operational amplifier is connected to one end of the first capacitor, and the other end of the first capacitor is electrically connected between the fifth resistor and the sixth resistor.

7. The modulation waveform output control device according to claim 1, characterized in that, The drive amplifier circuit includes a power amplifier, the boost output circuit includes a first transformer, the output pin of the power amplifier is connected to the primary winding of the first transformer, and the two ends of the secondary winding of the first transformer are respectively connected to the two ends of the treatment electrode of the electrotherapy device.

8. The modulation waveform output control device according to claim 7, characterized in that, The boost output circuit also includes a second transformer. A 31st resistor is electrically connected between the two ends of the secondary winding of the first transformer. The second end of the secondary winding of the first transformer is connected to one polarity pin of the treatment electrode of the electrotherapy device through a fuse. The first end of the secondary winding of the first transformer is connected to the other polarity pin of the treatment electrode of the electrotherapy device through the primary winding of the second transformer. The first end of the secondary winding of the second transformer is grounded. The second end of the secondary winding of the second transformer serves as the current output terminal of the boost output circuit.

9. The modulation waveform output control device according to claim 7, characterized in that, The power amplifier used is a TPA3110D2 amplifier.

10. An electrotherapy device, characterized in that, The invention includes the modulation waveform output control device and the treatment electrode as described in any one of claims 1 to 9, wherein the modulation waveform output control device is connected to the treatment electrode.

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