RU2265462C2 - Low-frequency magnetotherapy device - Google Patents

Abstract

FIELD: medicine; magnetotherapy.

SUBSTANCE: device can be used in cosmetology, dermatology and for combined influence onto human body in prophylactic and treatment purposes. Device has power amplifier connected with inductor, power supply unit, microcontroller made for generation of frequency sequence of 100 Hz and lower. Device also has switch for supplying supply voltage and for switching the supply voltage off, mode switch connected to control inputs of microcontroller, driver, power breakdown protection circuit and indication units made in form light-emitting diodes switched between signal outputs of microcontroller and null bus. Power amplifier is made on the base of field-effect transistor. Gate of the transistor is connected with output of microcontroller through driver; drain of the microcontroller is connected with null power and source - with output of winding of inductor's coil. Other output of inductor is connected with power bus, Diode is switched in parallel to winding at direction being opposite to supply bus. Device is portable and easy at exploitation.

EFFECT: improved medicinal effect.

4 cl, 3 dwg

Description

The invention relates to medicine, namely to magnetotherapy, and can be used in cosmetology, dermatology, as well as for complex effects on the human body during prevention and treatment.

It is well known that low-frequency physiotherapy is used in rehabilitation medicine, which has a pronounced analgesic effect in most acute and chronic diseases due to:

- physiological effects with individual selection of parameters;

- slow development of adaptation to exposure;

- a wide variation in the parameters of the procedures;

- the possibility of influencing the function of the peripheral nervous system and internal organs.

(See. "Magnetotherapeutic equipment", GR Soloviev, M .: Medicine, 1991).

It should be noted that a continuous magnetic field has a sedative effect, and intermittent - an exciting, stimulating effect, which is especially amplified in an irregular mode.

Such a pulsating (pulsed) magnetic field provides unidirectional electrodynamic forces that act on charged particles in the body (anions, cations, polar molecules), moving them. This allows you to activate in the body (in the area of effect) the process of diffusion, mass transfer, metabolism, increases the functional activity of individual organs and the body as a whole, i.e. a new method is implemented - magnetophoresis, i.e. a combination of two simultaneously acting therapeutic factors: a magnetic field and a medicinal or cosmetic preparation (in the form of a cream, gel, etc.), used both in massage and in treatment.

One of the problems of modern magnetotherapy is: firstly, the inconvenience of operation due to the cumbersomeness of medical equipment, and secondly, the low therapeutic effect as a consequence of the first, because not all parts of the human body can be subjected to medical procedures, thirdly, the patient safety issue is separate, because currently, mainly for the supply of inductors, an industrial electric network ~ 220 V / 50 Hz is used.

It is known to use a traveling pulsed low-frequency magnetic field in the treatment of patients based on the Alimp-1 apparatus, which consists of a master oscillator, a power amplifier, and inductors. The device generates a magnetic field with rectangular pulses with a frequency of 10-100 Hz, with magnetic induction of 3 mT in the center and 10 mT at the edges of the inductor (see. "Problems of balneology, physiotherapy and physiotherapy", No. 4-89, M .: Medicine, pp. 43-46).

The disadvantage of this apparatus is its limited use, mainly for the treatment of lumbar osteochondrosis, due to its cumbersomeness due to the use of solenoids as inductors, which also require additional safety measures, because 220 V / 50 Hz AC network is used to power the solenoids.

The known device of low-frequency magnetotherapy ANMT - "Neiva", designed for therapeutic effects on the human body with a low-frequency sinusoidal magnetic field, see the brochure (attached to the application materials). The device is simple to primitiveness (this is its advantage), there are no frequency adjustments (a constant frequency of 50 Hz is adopted), two modes are discrete by magnetic induction: for children and adults. These are already flaws. Also, its drawbacks include a supply voltage of ~ 220 V / 50 Hz, which classifies it as category II in electrical safety.

In general, devices for magnetotherapy are quite a wide variety, but they all have the following disadvantages:

- simple in design and construction, rather cheap ≈20-30 $, but not very functional;

- multifunctional ones have various adjustments: in frequency, type of impulses (rectangular, triangular, alternating, etc.), in amplitude, magnitude of magnetic induction, etc., but they are difficult to operate, not every user will be able to understand them, and as a result of this, they are quite expensive up to $ 200-500.

However, the therapeutic use of pulsed low-frequency devices can be further expanded using new data on the physiology of the nervous system.

Studies conducted by L.Kh. Garkavi, E.B. Kvakina, T.S. Kuzmenko (1998), proved that in addition to the state of stress arising from extreme psychological, physical and physiological stresses (a variety of diseases and injuries), the body transitional states (training, calm and increased activation) may occur. Achieving these so-called adaptive reactions helps to establish the optimal functioning of not only the nervous, but also the immune systems of the body, which allows you to achieve faster recovery and prevent the occurrence of a wide variety of diseases. The activation therapy developed by L.K. Garkavi consists in calling and maintaining anti-stress reactions in the body at high levels of reactivity. The basis of activation therapy is the use of vibrational properties of the body to correct its functional state. As the main factor of influence, the author of activation therapy used the effect of a low-frequency alternating magnetic field on the brain.

It turns out that the use of low-frequency pulsed currents can be a simpler and less effective effect, since the proximity of their parameters to the fluctuations in the natural biocurrents of the human body allows rhythmically organized information that spreads along the ascending paths of the spinal cord to reach higher autonomic centers of the spinal cord. The transfer of an organism from a state of stress to a state of adaptation can be achieved by a stepwise change in the frequency or strength of the current according to the reaction coefficient selected and tested by L.Kh. Garkavi.

Of fundamental importance from a practical point of view is the possibility of using the proposed method for both local (direct lesion focus) and general (anti-stress) effects, see discovery No. 158.

The disadvantages of the method include the following: so it is accepted that the interval of the affecting frequencies between themselves obeys a certain musical scale, namely, a small third, and the affecting effects are associated with the concept of dissonant and consonant sounds in a musical series. Practice shows that the connection between physiology and music is nothing more than a “beautiful image” and has no scientific justification. T.O. the selected frequency of exposure is only sometimes close to real, really affecting the body in the right direction.

The disadvantages of the prototype is the lack of physiological effects.

An object of the invention is to increase the therapeutic effect due to exposure to a low-frequency field with a frequency of 100 Hz and below.

To solve this problem, an apparatus for low-frequency magnetotherapy is proposed, comprising a power amplifier connected to an inductor, a power supply unit, a microprocessor configured to generate a sequence of frequencies from 100 Hz and below, a switch for supplying and switching off the supply voltage, a mode switch connected to the control inputs a microcontroller, characterized in that a driver, a breakdown power protection circuit, and indication elements in the form of LEDs included between signal the outputs of the microcontroller and the zero bus, while the power amplifier is mounted on a field-effect transistor, the gate of which is connected through the driver to the output of the microcontroller, the drain is connected to zero power, and the source is in the output of the coil of the inductor, the other terminal of which is connected to the power bus, parallel to the coil diode in the opposite direction to the power bus; radio-electronic elements are placed inside the case on a printed circuit board with surface mounting, and the connections between the printed circuit board, power supply, inductor, switches and indication and signaling elements are made with flat cables; the case is made in a form convenient for placing it in the palm of your hand; the case is made detachable from Lustron QE-1088 material with the possibility of fixing the detachable parts to each other; a battery is used as a power supply, and a microcontroller protection circuit from undervoltage is included in the device, connected between the positive power bus and the microcontroller input and equipped with an alarm element in the form of an LED; the battery is located in the place of the minimum thickness of the case and has a connector for connecting the adapter; on one side of the case there are switches and indication elements, and on the other side there is an inductor and a battery cover; the inductor coil is made with right-hand winding.

Figure 1 shows the electrical schematic diagram of the apparatus, figure 2 - constructive apparatus, figure 3 - timing diagrams at the output of the inductor for frequencies of 100 and 30 Hz (example).

Figure 1 indicates: AK - battery, Ш - connector for charging it, СН1-СН2 - touch switches for applying voltage to the electronic circuit of the device and turning it off, respectively, Pr - fuse (fuse), VD1 - high-speed zener diode, C - a capacitor for protection against external interference, R1 - a protective resistor against overcurrent on a field effect transistor VT1, Indus - an inductor (inductor on a steel core) to create a magnetic field, VD2 - a protective diode of an inductor, VD3 - a zener diode to protect VT1 from overvoltage , CH3 - touch mode switch, MS - microcontroller, driver with resistors R2 and R3 for setting the VT1 mode, HL1-HL6 - indicator LEDs for signaling the mode from 100 Hz and below, HL7 - indicator LED about the voltage drop on the AK below the permissible level, SP - MS protection circuit from undervoltage.

Figure 2 shows the main dimensions and location of the controls and indications.

All components can be performed on the following ERE and IC.

AK - preferably with a large number of ampere hours, so that it can be used in the field; CH1-CH3 - pseudosensors, for example, on a film keyboard "Testa-Flex", a Zener diode VD1 type P6KE 6.8CA; C - any high-frequency capacitor with a capacity of ≈1000 pF; R1-R4 - any type C2-33 ± 5% -0.125 W; MS - a microcontroller, such as Zilok, PIC or any other with sufficient functional software; driver of the IC 555 series; LEDs HL1-HL6 - type KIPD-45V-M, flashing LED HL7 type L297 YD-F; SP - type КР1171 СП-42; Zener diode VD3 - type D814; diode VD2 - type D223.

The electrical schematic diagram has the following connections: the input connector Ш is connected to the positive terminal of the AK with a plus and minus with the negative terminal of the AK and with the common minus of the entire circuit (⊥); plus AK through sensors CH1-CH2 and through Pr forms a common power bus “a”, which is directly connected to the MC, driver, SP and capacitor C, and through R1 to the cathode VD2 and one end of the inductor, the second end of the inductor is connected to the cathode VD3, drain VT1 and anode VD2; SNZ sensor “Mode” is connected to the control input of the MS, the pulse output of which through the driver and the common point of resistors R2 and R3 are connected to the gate VT1, and the signal outputs through the LEDs HL1-HL7 are connected to the common minus of the circuit; the IN input of the SP is connected directly to the positive terminal of the AK, the output out with the same plus through the resistor R4 and with the trip input MC (MCLR).

Apparatus for low-frequency therapy works as follows. With a normally charged AK battery and when you press the CH1 "Power" "On" button, the microcontroller MS starts to give out a frequency of 100 Hz, which is indicated by the glow of the indicator (LED) HL1. In this case, the patient (user) applies the inductor of the device to the hypotolamus (occipital part of the head) and holds its appointed time (≈5-10 min). Then he presses the “Mode” button, while the MS generates a frequency of 30 Hz (the HL1 LED goes out and the HL2 LED lights up), and the user applies the device’s inductor to a bruised or sore spot in the body and also keeps its assigned time (the same 5-10 min), etc., passing all frequencies (six frequencies in total), controlling them by sequentially lighting the corresponding LEDs up to and including HL6. This ends the procedure. For some stresses or diseases, for example, with a toothache, the order of passage of frequencies is different, namely: a frequency of 100 Hz is assigned to a sore spot for a period of 10-20 minutes, and then we switch to the hypothalamus with low frequencies of 30 Hz or less.

The electronic circuit of the device has a number of protective elements, such as:

- the device can be powered from an adapter that converts the voltage ~ 220 V / 50 Hz to a constant voltage for the selected type of battery, it is provided that the battery is charged with the same voltage, and from exceeding the voltage is higher than the permissible one or even from breakdown ~ 220 V / 50 Hz a fuse and a high-speed Zener diode VD1 are used at the input of the device, which limits the voltage at the stabilization level until the fuse blows. To connect the adapter, use the standard connector Ш;

- when using the device without an adapter, the power supply of the electronic circuit comes from the battery, whose capacity is designed for 10-12 hours of continuous operation, while protecting the MS from a low supply voltage (IMS SP), which turns off the MS and turns on the blinking LED HL7, which signals about low battery;

- the remaining electro-radio elements are used to set the operating modes of the electronic circuit and are not of particular interest.

The design of the device is made taking into account the requirements of ergonomics and modern design, its shape is slightly rounded, fits comfortably in the palm of your hand, as if it were an extension of the hand, this mnemonically corresponds to its natural movements when using it: circular, sequential, scanning (tacks), massage, etc. .

The control of the device itself and the setting of modes are maximally facilitated and easily accessible to any patient, both a child and elderly people, since all mechanical parts are excluded: toggle switches, wrench switches, etc., which also reduce reliability.

I would especially like to note that the device as a whole (especially its circuit diagram) is developed from the “cost-effectiveness” condition. Given that modern devices for magnetotherapy, both domestic and foreign, cost about 200 or more dollars, which, of course, is not available to most pensioners, the price of the proposed device does not exceed $ 60-70 for mass production.

The device as a whole has the following advantages, namely:

- has an effective market value and commercial viability;

- has a low level of power consumption, i.e. high efficiency;

- insignificant geometric dimensions;

- low cost of hardware;

- technological transparency.

Further, we note that most modern devices for low-frequency magnetotherapy do not at all take into account the direction of the field sign (its swirling), but in vain. It is known from the theory of torsion fields that a right-handed field has a positive effect, and a left-handed one is the other way around, but magnetic or electromagnetic fields are a type of torsion field, therefore the direction of the “swirl” is strictly taken into account in the proposed apparatus: only clockwise, i.e. right-handed, when viewed from the side of the inductor membrane, which is applied to the patient.

Claims (8)

1. The apparatus for low-frequency magnetotherapy, comprising a power amplifier connected to an inductor, a power supply unit, a microcontroller, configured to generate a sequence of frequencies from 100 Hz and below, a switch for supplying voltage and turning it off, a mode switch connected to the control inputs of the microcontroller, characterized in that a driver, a breakdown power protection circuit and indication elements in the form of LEDs connected between the signal outputs of the microcontroller and the zeros are introduced into it ohm bus, while the power amplifier is mounted on a field-effect transistor, the gate of which through the driver is connected to the output of the microcontroller, the drain is connected to zero power, and the source to the terminal of the coil of the inductor, the other terminal of which is connected to the power bus, the diode is connected in parallel with the direction reverse to the power bus. 2. The apparatus according to claim 1, characterized in that the radio electronic elements are placed inside the housing on a surface-mounted printed circuit board, and the connections between the printed circuit board, power supply, inductor, switches and indication and signaling elements are made with flat cables. 3. The apparatus according to claim 2, characterized in that the housing is made in a form convenient for placing it in the palm of your hand. 4. The apparatus according to claim 3, characterized in that. that the case is made detachable from the material Lustron QE-1088 with the possibility of fixing the detachable parts together. 5. The apparatus according to claim 4, characterized in that a battery is used as the power supply unit, a microcontroller protection circuit from undervoltage supply is included in the apparatus, connected between the positive power bus and the input of the microcontroller and equipped with an alarm element in the form of an LED. 6. The apparatus according to claim 5, characterized in that the battery is located in the place of the minimum thickness of the housing and has a connector for connecting the adapter. 7. The apparatus according to claim 6, characterized in that the switches and display elements are placed on one side of the housing, and the inductor and the battery cover on the other side. 8. The apparatus according to claims 1-6, characterized in that the inductor coil is made with right-hand winding.

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