CN219110643U

CN219110643U - Waveform generation and control circuit suitable for medium-low frequency electric stimulator

Info

Publication number: CN219110643U
Application number: CN202222968516.8U
Authority: CN
Inventors: 石兵锋
Original assignee: Hangzhou Anke Intelligent Control Technology Co ltd
Current assignee: Hangzhou Anke Intelligent Control Technology Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-06-02
Anticipated expiration: 2032-11-08

Abstract

The utility model discloses a waveform generation and control circuit suitable for a medium-low frequency electric stimulator. In order to solve the problem that the therapeutic effect of a patient is poor after the therapeutic waveform is adapted to the therapeutic waveform caused by the common single therapeutic waveform of the electrotherapy instrument in the prior art; the utility model comprises an analog-to-digital conversion module, wherein the analog-to-digital conversion module comprises a DA conversion circuit and a power amplifier circuit, the DA conversion circuit converts a received digital signal into an analog signal and transmits the analog signal to the power amplifier circuit, the power amplifier circuit transmits the processed signal to a signal processing module, and the signal processing module generates a waveform and transmits the waveform to an output module. By combining the embedded technology, analog electronic technology, digital electronic technology, signal processing technology, serial communication technology and the like, a signal source is designed for the electrotherapy instrument, the pulse width and the amplitude can be adjusted, and the electrotherapy instrument is controlled to generate any waveform.

Description

Waveform generation and control circuit suitable for medium-low frequency electric stimulator

Technical Field

The utility model relates to the field of waveform control circuits, in particular to a waveform generation and control circuit suitable for a medium-low frequency electric stimulator.

Background

The electrotherapeutic instrument is widely applied medical equipment in modern society, and mainly generates different types of electric signals through a signal source generator in the aspect of the principle of physiotherapy, and the electric signals are used for carrying out electric stimulation specifically aiming at disease parts of patients, so that the central nervous system is stimulated to release nerve substances with modulation effect, and the aim of electric stimulation treatment is achieved. However, the waveform generated by the signal source of the electrotherapy apparatus is generally too single, so that the patient is easy to stimulate the habitual waveform after using the electrotherapy apparatus for a period of time, and the therapeutic effect is poor. The existing traditional electrotherapy apparatus simply simulates the electronic technology, various waveforms are generated through the principles of resonance and the like, the hardware circuit of the produced signal source is fixed, the controllability is not high, the electromagnetic interference resistance is weak, and the output waveform has larger error. Generally, an oscillating circuit consisting of a 555 timer, a triode, an adjustable potentiometer, a capacitor, a transformer and the like is adopted to generate stimulation pulses for working. The width and amplitude of the pulse can be adjusted, but the generation of any waveform can not be controlled as required, and the problems of single treatment waveform, difficult control of treatment intensity, low safety coefficient and the like exist. The application effect is easily limited because of the inability to achieve low amplitude, low frequency onset, waveform envelope, and bi-directional waveform stimulation of the waveform, with flexible waveform changes in accordance with patient response.

For example, an "adjustable bone trauma pulse electrotherapy apparatus" disclosed in chinese patent literature, its bulletin number CN101991913a, includes output line, input line, siphon pipeline and contact ear, characterized in that: the two contact lugs are connected with a pulse inductor through a line with adjustable length, a pulse chip with extremely high sensitivity is arranged on the pulse inductor, and the pulse chip is contacted with the disabled part of a patient; the pulse inductor is provided with an adjustable module, and different frequencies, such as low frequency, medium frequency and high frequency, can be adjusted according to the needs of patients. However, the scheme cannot change the waveform at will, and only the frequency band of the waveform can be adjusted to enable the waveform to be single, so that the treatment effect is negatively affected.

Disclosure of Invention

The utility model mainly solves the problem that the therapeutic effect of the electrotherapy instrument is poor after the therapeutic waveform is adapted to the waveform of the patient because the therapeutic waveform of the electrotherapy instrument is generally single in the prior art; the utility model provides a waveform generation and control circuit suitable for low-frequency electric stimulator combines embedded technology, analog electronic technology, digital electronic technology, signal processing technology, serial communication technology etc. to design a signal source for the electrotherapy instrument, and this signal source mainly includes singlechip minimum system, digital to analog conversion, power amplification module, filtering module and digital display operation module, can realize the regulation to pulse width and amplitude, control the electrotherapy instrument and produce arbitrary waveform.

The technical problems of the utility model are mainly solved by the following technical proposal:

the utility model comprises an analog-digital conversion module, wherein the analog-digital conversion module comprises a DA conversion circuit and a power amplifier circuit, the DA conversion circuit converts a received digital signal into an analog signal and transmits the analog signal to the power amplifier circuit, the power amplifier circuit transmits the processed signal to a signal processing module, the signal processing module generates a waveform and transmits the waveform to an output module, the DA conversion circuit in the digital-analog conversion module realizes the real-time modulation of the waveform width, and the power amplifier circuit realizes the real-time modulation of the waveform amplitude, so that the effect of modulating any waveform is realized.

Preferably, the signal processing module comprises a bidirectional waveform generating circuit, wherein the output end of the bidirectional waveform generating circuit is connected with an isolating circuit, and the isolating circuit transmits the processed waveform to the electrode output to form a stable bidirectional waveform.

Preferably, the DA conversion module adjusts the width of the waveform, outputs a width instant adjusting signal to the signal processing module, and the power amplification circuit adjusts the amplitude of the waveform, outputs an amplitude instant adjusting signal to the signal processing module, and realizes the real-time modulation of the width and the amplitude of the waveform.

Preferably, the output module comprises an isolation circuit and an electrode output, a double-pole double-throw relay is arranged at the joint of the isolation circuit and the electrode output, a double-pole gate is closed, the double-pole gate is connected with the electrode output and outputs waveforms, the double-pole gate is opened, the double-pole gate is disconnected with the electrode output and stops outputting waveforms, and the use safety of the internal circuit is guaranteed.

Preferably, the integrated circuit further comprises a control module and a display module, wherein the control module comprises a key module and an MCU central control, the key module transmits an input electric signal to the MCU central control, and the MCU central control transmits the electric signal to the display module and the DA conversion module, and the integrated circuit is regulated through the unified central control to prevent the circuit structure from being scattered.

Preferably, the MCU is provided with a threshold storage circuit for storing electric signals and calling signals of waveform width and amplitude and transmitting the electric signals and the calling signals to the display module; when a user uses the device, selecting any one condition of waveform width or amplitude, and transferring a threshold signal of another condition pre-stored in a threshold storage circuit to a display module for reference by the user by the MCU central control; the MCU central control is also provided with a memory storage circuit for storing used waveforms, when the user selects the width and the amplitude of the waveforms, the MCU central control retrieves pre-stored paired electric signals in the memory storage circuit, and if the same waveforms are compared, negative signals are transmitted back, so that the user is prevented from reselecting, and the user is prevented from using the waveforms repeated before so as to influence the treatment effect.

Preferably, the MCU is externally connected with the output end of the power supply circuit to supply power to the whole circuit.

The beneficial effects of the utility model are as follows:

1. the waveform generation and control circuit suitable for the medium-low frequency electric stimulator comprises an analog-to-digital conversion module, can realize the instant adjustment of waveform width, and a power amplification module can realize the instant adjustment of waveform amplitude and simultaneously is provided with a signal processing module to realize the generation of bidirectional waveforms;

2. the waveform generation and control circuit suitable for the medium-low frequency electric stimulator is provided with the double-pole double-throw relay at the electrode connection outlet, and when waveform output is not needed, the internal circuit of the cut end is associated with the outside, so that the internal circuit is protected from being damaged by the interference of the outside;

3. the waveform generation and control circuit suitable for the medium-low frequency electric stimulator is provided with the storage circuit in the MCU central control, and the prestored electric signals in the calling circuit are compared with the input electric signals, so that the waveform limitation condition is prompted when a user inputs the waveform limitation condition, the user experience is improved, and the rationality of selecting the waveform is ensured.

Drawings

FIG. 1 is a schematic flow chart of a waveform generation and control circuit suitable for use in a low-and-medium frequency electrical stimulator according to the present utility model;

FIG. 2 is a power circuit diagram of a waveform generation and control circuit suitable for use in a low-and-medium frequency electrical stimulator according to the present utility model;

FIG. 3 is a schematic diagram of a MCU central control circuit suitable for a waveform generation and control circuit of a medium-low frequency electric stimulator according to the present utility model;

fig. 4 is a diagram of a DA conversion circuit, a power amplifier circuit, and a bidirectional waveform generation circuit suitable for a waveform generation and control circuit of a medium-low frequency electric stimulator according to the present utility model.

Detailed Description

The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.

Examples:

the waveform generation and control circuit suitable for the medium-low frequency electric stimulator of the embodiment comprises a key module, an MCU central control, a power supply circuit, a display module, a DA conversion module, a power amplifier circuit, a bidirectional waveform generation circuit, an isolation circuit and electrode output as shown in fig. 1, 2, 3 and 4. The DA conversion circuit converts the received digital signals into analog signals and transmits the analog signals to the power amplifier circuit, the power amplifier circuit transmits the processed signals to the bidirectional waveform generating circuit, and the bidirectional waveform generating circuit generates waveforms and transmits the waveforms to the isolation circuit to be output through the electrode; the power supply circuit is connected with the MCU central control so as to limit the current and the voltage of the whole circuit, and the safe operation of the whole circuit can be effectively ensured.

The DA conversion module adjusts the width of the waveform, outputs a width instant adjusting signal to the signal processing module, and the power amplifier circuit adjusts the amplitude of the waveform, and outputs an amplitude instant adjusting signal to the signal processing module. The connection part of the isolation circuit and the electrode output is provided with a double-pole double-throw relay, the double-pole gate is closed, the isolation circuit is connected with the electrode output and outputs waveforms, the double-channel gate is opened, the isolation circuit is disconnected with the electrode output and the waveforms are stopped from being output. When the double-blade gate is used, the double-blade gate is closed, and waveform is not required to be output when the double-blade gate is placed, so that the double-blade gate is opened, the internal circuit is cut off from being associated with the outside, and the internal circuit can be effectively protected from being damaged by the interference of the outside.

The MCU central control is provided with a threshold storage circuit which stores electric signals and calling signals of waveform width and amplitude and transmits the electric signals and the calling signals to the display module; the MCU central control is also provided with a memory storage circuit for storing used waveforms. The MCU central control is externally connected with the output end of the power supply circuit to supply power for the whole circuit. When the MCU is used by a user, any one condition of the waveform width or the amplitude is selected, and the MCU is used for controlling and calling a threshold signal of another condition prestored in the threshold storage circuit and transmitting the threshold signal to the display module for the user to refer to.

After the user selects the width and amplitude of the waveform, the MCU central control retrieves the pre-stored paired electric signals in the memory storage circuit, and if the pre-stored paired electric signals are compared with the same waveform, a negative signal is returned to indicate the user to reselect, so that the user is prevented from using the waveform repeated before to influence the treatment effect.

It should be understood that the examples are only for illustrating the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. The waveform generation and control circuit suitable for the medium-low frequency electric stimulator comprises an analog-to-digital conversion module and is characterized in that the analog-to-digital conversion module comprises a DA conversion circuit and a power amplifier circuit, the DA conversion circuit converts a received digital signal into an analog signal and transmits the analog signal to the power amplifier circuit, the power amplifier circuit transmits the processed signal to a signal processing module, and the signal processing module generates a waveform and transmits the waveform to an output module.

2. The waveform generation and control circuit for a low-and-medium frequency electrical stimulator according to claim 1, wherein the signal processing module comprises a bidirectional waveform generation circuit, an output end of the bidirectional waveform generation circuit is connected with an isolation circuit, and the isolation circuit transmits the processed waveform to an electrode output.

3. The waveform generation and control circuit for a low-and-medium frequency electric stimulator according to claim 2, wherein the DA conversion circuit adjusts the waveform width, outputs a width instant adjusting signal to the signal processing module, and the power amplifier circuit adjusts the waveform amplitude, and outputs an amplitude instant adjusting signal to the signal processing module.

4. A waveform generation and control circuit suitable for a low-and-medium frequency electric stimulator according to claim 3, wherein the output module comprises an isolation circuit and an electrode output, a double-pole double-throw relay is arranged at the connection part of the isolation circuit and the electrode output, a double-pole gate is closed, the double-pole gate is connected with the electrode output and outputs a waveform, the double-way gate is opened, and the output waveform is disconnected from the electrode output and stopped.

5. The waveform generation and control circuit suitable for a low-and-medium frequency electric stimulator according to claim 4, further comprising a control module and a display module, wherein the control module comprises a key module and an MCU central control, the key module transmits an input electric signal to the MCU central control, and the MCU central control transmits the electric signal to the display module and the DA conversion module.

6. The waveform generation and control circuit suitable for the medium-low frequency electric stimulator according to claim 5, wherein the MCU is provided with a threshold value storage circuit for storing electric signals and calling signals of waveform width and amplitude and transmitting the electric signals and calling signals to the display module; the MCU central control is also provided with a memory storage circuit for storing used waveforms.

7. The waveform generation and control circuit for a low-and-medium frequency electric stimulator according to claim 6, wherein the MCU is externally connected to the output end of the power circuit to supply power to the whole circuit.