CN110681052A - Electrotherapy stimulation instrument - Google Patents

Abstract

The electrotherapy stimulator includes a power supply module, a voltage conversion module, a constant current module, a positive output, a negative output, an overvoltage protection module, a current detection module, an overcurrent protection module, a current intensity setting module, a control module, a user command module, and a data storage module. It is connected with the data display module, the voltage conversion module and the constant current module, so the current is constant but adjustable. At the same time, the current processed by the constant current module is less than three mA, that is, the current generated by the instrument is less than the safe current (ten mA) of the human body, thus ensuring the safety of the user. The beneficial effect of the present invention is that the current of the instrument is constant but adjustable, and the user can directly control the size of the current, or the computer can control the size of the current according to the data required by the user to change with time. Current-adjustable stimulators are more suitable for actual needs. The effect is controllable since the required current is constant over a period of time.

Description

An electrotherapy stimulator

technical field

The invention relates to the field of biotechnology, in particular to an electrotherapy stimulator.

Background technique

Electrotherapeutic stimulation is an effective physical therapy method with a long history, but it mostly focuses on controlling the voltage of stimulation, applying a controllable voltage to the organism, usually a pulsed AC voltage with a certain waveform. However, the resistance of the living body is not a constant value, and there are differences between different individuals. The same individual has different resistances in different environments, humidity conditions or different temperature environments. Therefore, the effect of the current electrotherapy stimulator is not very ideal. Therefore, the present application discloses a current controllable current stimulator that uses DC without pulses. When the resistance of the load changes for whatever reason, the output voltage will be automatically adjusted to keep the output current within a constant value range.

SUMMARY OF THE INVENTION

Based on this, the present invention proposes an electrotherapy stimulator, the current of which is constant within a certain period of time, the size of this constant value is adjustable, the user can directly control the size of the current according to the needs, or the computer The required data changes with time to regulate the magnitude of the current. Since the current provided is constant within a period of time, the effect is controllable and ideal.

In order to realize the purpose of the present invention, the present invention adopts the following technical solutions:

The electrotherapy stimulator includes a power supply module, a voltage conversion module, a constant current module, and a control module, the power supply module is connected with the voltage conversion module, the output end of the voltage conversion module is connected with the receiving end of the constant current module, and the output end of the constant current module is set. There are a positive output terminal and a negative output terminal, and the positive output terminal and the negative output terminal are arranged in pairs; the constant current module is also connected to a current detection module; the voltage conversion module is also connected to an overvoltage protection module; The protection module is connected to the voltage conversion module, the overvoltage protection module is connected to the receiving end of the constant current module through the voltage conversion module, and the constant current module is fed back and connected to the control module through the current detection module; the power module rectifies the alternating current or the battery or the photovoltaic cell into a DC power is used to power the other modules of the instrument. The control module is used to control the work of the instrument and the setting of the current intensity. After the control module sets a current value, the output current of the constant current module remains around this value range until the control module inputs the input to the constant current module through the current intensity setting module. The output current of the constant current module changes only after the next setting data.

Preferably, in the electrodes arranged in pairs, the positive output end is close to or contacts one end of the living body, and the negative output end is close to or contacts the other end of the living body.

Preferably, multiple pairs of electrodes arranged in pairs can be used simultaneously.

Preferably, in the electrodes arranged in pairs, the positive output end is close to or contacts one end of a meridian of the living body, and the negative output end is close to or contacts the other end of the same meridian of the living body.

Preferably, in the electrodes arranged in pairs, the positive output end is close to or contacts the starting end of one of the same-named vias of the living body, and the negative output end is close to or contacts the end of the other biologically-identified vias.

Preferably, the constant current module adjusts the current converted by the voltage conversion module into a constant current of zero to three milliamps and then sends it to the electrode, and the current processed by the constant current module is less than three milliamps, that is, the current generated by the product Much smaller than the safe current, the safe current of the human body is ten mA, this product ensures the safety of the user.

Preferably, the control module is a computer.

Preferably, the control module is further connected to a data storage module and a data display module respectively, and the data storage module and the data display module are used for storing electrotherapy data and displaying electrotherapy data (including current data and total electrotherapy data).

Preferably, the overcurrent protection module includes a single-chip microcomputer, and the single-chip microcomputer stores a switching threshold value, and the overcurrent protection module is used for monitoring and protecting the voltage conversion module.

Preferably, the overvoltage protection module is composed of a voltage regulator tube connected in parallel to both ends of the voltage conversion module.

Preferably, the current detection module includes a detection resistor, and the detection resistor is connected in series with the output end of the constant current module.

Preferably, the sense resistor is a nominal resistor.

The beneficial effect of the present invention is that the current of the instrument is constant but adjustable, and the user can directly control the size of the current, or the computer can control the size of the current according to the data required by the user to change with time. The adjustable current of the instrument has better effect and is more suitable for actual needs. Since the current required for a period of time is constant, the effect is not good or bad, the effect is controllable, and a good solution can be accumulated through exploration.

Description of drawings

Figure 1 is a schematic block diagram of an electrotherapy stimulator.

Figure 2 is a flow chart of an electrotherapy stimulator.

FIG. 3 is a circuit diagram of this embodiment.

In the figure: 1-power module; 2-voltage conversion module; 3-constant current module; 4-positive output; 5-negative output; 6-overvoltage protection module; 7-current detection module; 8-overcurrent protection module; 9-current intensity setting module; 10-control module; 11-user command module; 12-data storage module; 13-data display module.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that when an element or module is said to be "connected" to another element or module, it can be directly connected to the other element or module or intervening elements or modules may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The technical solution of the present patent will be described in further detail below in conjunction with specific embodiments.

As shown in Figure 1, the electrotherapy stimulator includes positive and negative electrodes (ie positive output 4 and negative output 5), a power supply module 1; a voltage conversion module 2, a constant current module 3, an overvoltage protection module 6, and a current detection module 7. Overcurrent protection module 8, current intensity setting module 9, control module 10, user command module 11, data storage module 12, data display module 13, the electrotherapy stimulator outputs a DC current less than 3 mA. The control module 10 may adopt a single chip microcomputer. The current detection module 7, the overcurrent protection module 8, the current intensity setting module 9, the control module 10, the user command module 11, the data storage module 12, and the data display module 13 can be integrated into one, and these functions can be realized by using a single-chip microcomputer, that is, It adopts a single-chip microcomputer with complete and powerful functions, such as STM32 series or other single-chip microcomputers with the latest touch screen technology, sufficient memory, and multiple output and input ports. The touch screen can display data and allow operators to input user instructions, which is convenient for users to operate. At the same time, it also greatly simplifies the instrument, saves many discrete components, reduces the volume of the instrument and relatively reduces the cost of instrument manufacturing.

As shown in Figure 2, the user turns on the computer, the computer resets and initializes, and then the user enters the relevant data, and sets the value, time, date, name, usage preference, etc. of the overcurrent protection, and the computer outputs a square wave with a certain duty cycle. It is used to control the on and off of the transistor Q1 to form a pulse, which charges the capacitor C2 through the diode, thereby generating a higher DC voltage for output; the computer detects the current flowing through the resistor R3 from time to time, and sets the If the actual current is larger, the computer will turn off the output of the square wave, otherwise the output will be turned on; then the computer waits for a short period of time, and then checks whether the user has a new command, that is Newly set value; repeat these steps until the user shuts down. The computer adjusts the width of this square wave on or off to achieve different results.

As shown in Figure 3, the AC input and the rectifier bridge capacitor C1 constitute the power module 1, and the power module 1 rectifies the input AC into DC for use by other modules; the PWM (pulse width adjustable) square wave output by the computer, the triode Q1 , diode D2, capacitor C2 and inductor L1 form a voltage conversion module 2, which converts the low-voltage DC of the two pins of capacitor C1 into high-voltage DC for use in the following circuits; Zener diode D3 forms a voltage overvoltage protection module 6, when the two When the voltage of the terminal exceeds a certain value (the threshold can be set according to the actual user's needs), it will be broken down, so that the voltage is stabilized at a certain value to ensure the safety of the user.

Operational amplifier U1, resistor R4, Zener tube D1, resistor R1, transistor Q2, variable resistor RV1, and resistor R3 form constant current module 3, of which resistor R4 and Zener tube D1 provide reference voltage for pin 3 of the operational amplifier. The characteristics of the amplifier make the voltage values of pins 3 and 2 equal, so that the potential at pin 3 of the variable resistor RV1 is always equal to the standard value of the voltage regulator tube D1, such as 3V, so that the voltage flowing through the variable resistor RV1 is The current is always equal to the standard value of D1 divided by the sum of the variable resistor RV1 and the resistor R3. Keeping the current flowing through the resistor R2 is always constant, which acts as a constant current. Change the value of the variable resistor RV1. Change the size of this current; the variable resistor RV1 constitutes the current intensity setting module 9; the resistor R2 is the load, and its two ends are the output terminals, the top is the positive pole, and the bottom is the negative pole; the pin number/analog of the computer is the signal input The pin and the resistor R3 constitute a current detection module 7, and the computer converts the detected value between analog and digital to obtain the corresponding current value. The computer constitutes a control module 10, an overcurrent protection module 8, a data storage module 12, a user command module 11 and a data display module 13. When the current value reaches a certain value, the constant current module 3 feeds back to the computer through the current detection module, and the computer adjusts the PWM The duty cycle of the square wave or the square wave is turned off, so as to play the role of overcurrent protection; the user command module 11 included in the computer can accept the settings of the user's data about the overcurrent protection value, usage plan, and preference.

In other embodiments, the current intensity setting module 9 can also be included in the control module and completed by a computer, that is, the computer includes the function of the above example RV1, and the computer monitors the current of the current detection module 7 in real time to achieve the desired current When the PWM square wave is turned off immediately or adjust the duty cycle of the PWM square wave, turn on the square wave or adjust the duty cycle of the square wave when it is less than a certain value, so as to maintain the load current within a range of values, use this method Computer programming is much more complicated than the former.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims (10)

1. An electrotherapy stimulation instrument is characterized by comprising a power supply module, a voltage conversion module, a constant current module and a control module, wherein the power supply module is connected with the voltage conversion module; the constant current module is also connected with the current detection module; the voltage conversion module is also connected with an overvoltage protection module; the control module is connected with the voltage conversion module through the overcurrent protection module, the overvoltage protection module is connected with the receiving end of the constant current module through the voltage conversion module, and the constant current module is connected with the control module through the current detection module in a feedback mode; the power module rectifies alternating current or battery or photocell into direct current for powering other modules of the instrument.

2. The electrotherapy stimulator according to claim 1, wherein the paired electrodes have positive output terminals near or in contact with one end of a living body and negative output terminals near or in contact with the other end of the living body.

3. The electrotherapy stimulator according to claim 1, wherein at least one pair of electrodes is provided.

4. The electrotherapy stimulator according to claim 1, wherein the positive output terminals of the paired electrodes are close to or in contact with one end of a meridian of a living body, and the negative output terminals are close to or in contact with the other end of the same meridian of the living body.

5. The electrotherapy stimulator according to claim 1, wherein the constant current module adjusts the current converted by the voltage conversion module to a constant current of zero to three milliamperes and then transmits the current to the electrodes.

6. The electrotherapy stimulator according to claim 1, wherein said control module is a computer for controlling the operation of the device and for detecting the current level.

7. The electrotherapy stimulator according to claim 1 or 6, wherein the control module is further connected to a data storage module and a data display module respectively, and the data storage module and the data display module are used for storing and displaying data.

8. The electrotherapy stimulator according to claim 1, wherein the over-current protection module comprises a single chip microcomputer having a switch threshold stored therein, and is configured to monitor and control the voltage conversion module.

9. The electrotherapy stimulator according to claim 1, wherein the overvoltage protection module comprises at least one voltage regulator connected in parallel across the voltage conversion module.

10. The electrotherapy stimulator according to claim 1, wherein the current detection module comprises a detection resistor, and the detection resistor is connected in series with an output terminal of the constant current module.

Images