Device for reflexology

 

(57) Abstract:

The invention relates to medical equipment. The device comprises a resistive active electrode, a power source, a storage capacitor, the control electronic unit and control unit of the charge accumulation capacitor, the pulse correlator, the indicator, the passive electrode. Storage capacitor provides a large supply of the pulsed power supply on the pulse correlator in the presence of a low power supply and generates the pulse heating of the active electrode with high stability. Unit electronic control includes an analog-to-digital Converter and a microprocessor-based device that control the operation of the unit charge and control energy of thermal pulse. The active electrode may be made of cut steel wire length of no more than 3 mm, the Device improves the efficiency of therapeutic effects by increasing the pulse heat. 10 C.p. f-crystals, 3 ill.

The invention relates to medical equipment, namely to devices used in physical therapy (reflexology) to locate releaee, in which to search for biologically active (reflex) points (BAP) from measurements of the electrical characteristics of the skin at the point of tangency and the impact on these points, for example, thermal pulses.

The measured electrical characteristics of the skin may be, for example, the potential of the point (RF, C. N 96110963, A 61 H 39/00) or electrical conductivity (RF patent N 2106855, A 61 H 39/00). In these cases, the measurement circuit must contain two electrodes for contact with the patient is active and passive, and the passive electrode is used only for circuit measurements and therefore can be performed in any suitable form, for example in the form of a metal tube that the patient takes in hand, or in the form of a flat electrode fixed on his body.

Search BAHT and thermal stresses is carried out using the point of the active electrode element of small dimensions, being in thermal contact with thermocouple, which can be heated by passing through it an electric current or otherwise, for example due to energy absorption of optical radiation (USSR and.with. N 1588417, A 61 H 39/00). When heated by an electric current is used allocated to the resistor and thermopile (USSR, A. with. 1393423, A 61 H 39/00). High-speed heating-cooling in thermal pulse can be achieved with a resistive active electrode which is separated Joul warmth educed. It thermoelement made in the form of wire or foil heater is simultaneously the electrode used to search for the BAT. Thus, electrical energy is converted into heat directly to the element in contact with the BAT. It makes possible to reduce the weight of items and thereby reduce their thermal inertia.

therapeutic effect of the use of such devices is determined by the value of the transferred thermal energy, i.e., the maximum achievable temperature point of the active element and the frequency of receipt of thermal pulses on the BAT. However, the large thermal inertia of the active electrode limits and achievable amplitude of thermal pulses, and the frequency of their repetition, because, firstly, at the time of exposure to heat more than 0.3 with pain develops at temperatures of 80 - 100oC, and, secondly, the repetition rate of thermal pulses on the BAHT is limited as the actual duration of the pulses wasdeleted sensations.

A device for reflexology, namely the device "Ventura PTP-1", which contains the active resistive electrode, a passive electrode, the power supply from the AC power circuit measure the resistance of the skin at the point of contact of the active electrode, the pulse generator heating of the active electrode, the generator pulse repetition rate of heating, controls the operating parameters of the device and indicator. An active electrode, which implements the invention in the patent RF N 1825312 made in the form of a segment of nichrome wire with a diameter of 0.14 mm and a length of 2 mm, which is mounted in a massive current-carrying electrodes, and placed in the remote unit connected to the device flexible two-wire cable supply heating current, the magnitude of which is defined by a chain of serial resistive regulation. Frequency of incoming pulses of heating is changed stepwise, and takes values of 0.5, 1, 2 Hz, and the pulse width of the heating varies in the range of 100 - 300 MS. Temperature impact on the patient is regulated by changing the heating current and, in the absence of contact of the active element with the BAT the temperature can reach 500 - 600oC.

A characteristic feature of the known is nnow cooling time nichrome wire, used in the active electrode. The result is a significant part of the energy is given to the electrodes, which reduces the maximum achievable temperature of the active element, leads to undesirable overheating of the electrodes and the heat just remote unit to reduce power while increasing energy consumption. From the point of view of physical therapy effects design defects are expressed in insufficient amplitude of thermal pulse and not sufficiently high pulse repetition rate. In addition, the AC current limits the autonomy and mobility of the device.

A device for reflexology.with. N 1588417, A 61 H 39/00, USSR) containing active and passive electrodes, block heat connected in series with the master oscillator, modulator, the first power amplifier and thermal infrared (IR) emitter connected to the active electrode, the control unit including first and second generators, generator modulating pulse, synth, and a logic circuit with a switch and power supply connected, and the control unit, to another switch, the output of which is connected to egovernance, produced by the generator control unit, synthesizer, operation mode which is set manually or automatically using a programmable timer, formed a working pulse sequence of the appropriate type, which after processing in the logic circuit is supplied to the active electrode for influencing the BAT that will be searched for the value of the ohmic resistance in the external circuit between the active and passive electrodes when moving the active electrode on the skin of the patient.

The known device allows accurate search BAT with the help of a special operation mode control unit providing light indication of their location, as well as simultaneously and alternately to influence BAHT electrical impulses of desired shape and length of their packs, concentrated thermal IR radiation with different modulation frequency.

However, the applied method of heating of the active electrode by successive conversion of electrical energy into optical, and then heat causes such disadvantages of the known device, such as the low efficiency of energy supply, considerable heat is high accuracy of setting and set the desired temperature effects. Significant disadvantages of such a device can be attributed to the relatively large dimensions, mass and heat capacity of the active electrode, which complicates the control and regulation of exposure parameters at the point of contact with the BAT. These factors significantly limit the effectiveness of therapeutic treatment.

The known device for acupuncture, including active and passive electrodes, power supply, control unit with display and control unit, is selected as the closest analogue of the claimed invention.

The objective of the invention is to improve the effectiveness of therapeutic effects by increasing the energy of a pulsed thermal impact and frequency of receipt of the pulses, as well as ensuring long-term autonomy of operation while maintaining a high level of electrical safety.

The problem is solved by the fact that the known device for acupuncture, including active and passive electrodes, power supply, control unit with display and control unit, in accordance with the invention equipped with a cumulative capacitor unit charge storage capacitor and a pulse correlator, the block counter is, the power unit is connected with a power input unit of charge, the second steward, whose input is connected to the first output unit electronic control, and the output unit charge connected to the first input unit electronic control, storage capacitor and a power input of pulse co-ordinator, the control input of which is connected with the second output unit electronic control, and the output from the active electrode, which is connected with the second input of the electronic control and the passive electrode is connected with the third output unit electronic control, while the active electrode is made resistive.

In addition, the electronic unit control is executed in the form of paired multi-channel analog-to-digital Converter (ADC), the inputs of which are the inputs of the unit, and the microprocessor unit (MCU) whose outputs are the outputs of the block.

In addition, resistive active and passive electrodes connected to the ADC inputs and outputs of the MCU through the measuring resistor.

In addition, the unit charge is made in the form of accumulation device-reset magnetic field energy.

There is hodna winding is connected directly to the resistive active electrode.

In addition, as an indicator of the selected digital or alphanumeric display, which is connected by bus to the outputs of the MCU.

In addition, the power supply unit contains a battery or galvanic elements.

In addition, the device is provided with a switch installed in the circuit block of the charge storage capacitor with the ability to connect its input to the power supply or external DC source and output respectively to the power input of the pulse correlator or the power supply.

In addition, the device is equipped with a remote manual control, which has at least two contact elements and is connected to the MPU.

In addition, an active electrode, a storage capacitor, the pulse correlator and remote manual control is structurally integrated and housed in the same building.

In addition, active resistive electrode made in the form of a segment of wire of length not more than 3 mm, mounted in holders with high thermal and electrical conductivity.

The technical result of the invention consists in the use of low thermal inertia resistance of the active electrode, which BAHT per one heat pulse, and increase the frequency of incoming pulses), as well as to improve the energy efficiency of the power supply and the accuracy of the determination of exposure parameters.

The invention is illustrated in Fig. 1, which includes: a) basic block diagram of the inventive device and (b) block diagram of the device is supplemented by a switch for connection to an external power supply and remote manual control; Fig. 2, which shows a diagram of the execution unit of the charge accumulation capacitor, and Fig. 3, which presents the execution scheme of the pulse correlator.

The device comprises a resistive active electrode 1, the power supply unit 2, a storage capacitor 3, the control electronic unit and control 4, the unit of the charge storage capacitor 5, the pulse correlator 6, indicator 7, the passive electrode 8. In the electronic unit control and 4 are paired multichannel ADC 9 and 10 MPa, and the analog input 9 input unit 4, and outputs the MPU 10 to its outputs.

In the device (Fig. 1A) power supply 1 connect with a power input unit of the charge storage capacitor 5, the second (control) input of which is connected to the first output of the electron is ontrol and management 4 (ADC input 9), cumulative capacitor 3 and a power input of the pulse correlator 6, the control input of which is connected with the second output unit electronic control 4 (the second output of the MCU 10), and the output pulse correlator 6 is connected to the active electrode 1, which is connected to the second input of the electronic unit and control 4 (second ADC input 9). The use of paired ADC 9 and 10 MPa provides high precision control and manage the operation of the device as a whole. The passive electrode 8 is connected to the third input of the control unit and control 4 (third ADC input), so limiting ourselves to each other through the patient, together with the built-in measuring resistors forms the measuring circuit, for example, shown in Fig. 1B resistors 11a, 11b and 12 is a diagram of the bridge.

Indicator 7, which is preferably in the form of a digital or alphanumeric display, connected to the MPU 10 bus, which allows to carry out the required monitoring of the impact on the patient by displaying the magnitude of the resistance of the skin at the point of contact of the active electrode 1 when searching for the BAT, as well as the current operating parameters of the device during therapy sessions.

Accumulate the user 6, which is connected to the active electrode 1, and may help reduce power to low-voltage power supply unit 2, from which it is charged to a predetermined voltage using the charge 5 in the interval between pulses of heating of the active electrode 1, as well as to stabilize the device when changing the EMF or the internal resistance of the power supply unit 2. The capacitance value of the capacitor 3 and the voltage charge, which is an input voltage pulse correlator 6 is chosen large enough so that the change in the voltage on the capacitor 3 during thermal pulse was negligible or limited to a safe value, which eliminates the possibility of overheating and melting of the active electrode in case of emergency, the failure of the device when opening pulse correlator 6 for a long time.

The power supply unit 2 comprises a source of direct current batteries or galvanic cells. For recharging from an external DC power source device provided with a switch contact groups 13A, 13B, installed in the circuit block of the charge storage capacitor 5 (Fig. 1B). The switch is thus h the condenser 5 to the storage capacitor 3 and the pulse correlator 6 in accordance with the main block diagram (Fig. 1A). If necessary, recharge the batteries of the power supply unit 2 from an external DC source contact group switch 13A connects the power input unit charge 5 to an external source, and the output unit charge 5 contact group switch 13B through a charging resistance 14 is connected to the power unit 2, breaking the power circuit of the active electrode 1 through the pulse correlator 6. To control the voltage of the external source is provided for connecting the respective terminals of the auxiliary input of the ADC 9. In this mode, when the supply voltage from the external source to the MCU 10 generates a signal switching unit charge 5 to work in the stabilization mode charge current battery.

The power consumed from the power supply 2 is small. To ensure the pulse repetition rate 10 Hz, with a pulse energy EN. max= 0,2 J. power required of the power supply 2 is 2 watts. This power may be obtained from modern miniature batteries or galvanic elements.

The unit of the charge storage capacitor 5 can be performed, in particular, in the form of a device for the drive-discharge energy of the magnetic field (Fig. 2). It contains draw the Torno key 16 and through a rectifying diode 17 - with load, the contact group 13B switch and cumulative condenser 3 or battery and charge circuit. This execution scheme unit charge 5 provides the ability to charge storage capacitor 3 to the desired voltage and stabilize the power supplied to the storage capacitor 3 for one pulse, or stabilization of the charge current of the battery. When the device MCU 10 delivers the enabling pulses to the transistor switch 16, and the duration of these pulses is determined by the value of the input voltage and the required number of pulses and the frequency of their revenues are calculated from known values of the required power and the total energy transferred to the load. The MPU 10 in the presence of a voltage on the terminal of the external source specifies the unit of charge 5 stabilization mode charge current battery, and in the absence of an external source - mode charge storage capacitor 3. If necessary, the control current value pozarica batteries may be carried out by the magnitude of the voltage drop on the charging resistance 14.

Pulse correlator 6 can be performed, in particular, the scheme vented cascade transformer tie which is charged to the desired voltage storage capacitor 3. Circuit currents of the primary winding of the transformer 18 are interconnected transistor keys 19a and 19b, and the output winding of the cascade connected directly to the active resistive electrode 1. The ratio of the number of turns of the primary and secondary windings of the transformer 18 is determined by the input voltage, the value R of the resistance of the resistive active electrode and the required pulse power heat W

Resistive active electrode 1 may be made in the form of a segment of metal (steel) wire length no more than 3 mm, and it should be fixed in the holders with high thermal and electrical conductivity. Therefore, the value of W is chosen large enough to ensure that heating of the active electrode 1 to the desired temperature for the time (tand), much smaller than the time constant of the cooling due to heat transfer to the electrodes and other contact with him in a constructive elements.

For convenience, the device can be equipped with remote manual control 20, in addition to the block 4. This remote connection to the inputs of the MCU 10, and allows selection of the operating mode of the device - search BAHT, therapy, setting the desired amplitude, frequency teplotih element (Fig. 1 is not shown).

It is convenient to constructively combine in one body 21 of the active electrode 1, the pulse correlator 6, the storage capacitor 3 and the manual control panel 20 that forms a discharge cylinder device to provide a more comfortable procedure.

The device operates as follows.

In the search mode BAHT passive electrode 8 is in contact with the patient, for example, clamped in his hand. The electrodes 1 and 8 from the MPU 10 are output potentials of the high or low level. In this case the ADC 9 command from the MPU 10 measures the potentials on the electrodes 1 and 8. On the measured potentials and the known values of the measuring resistances MCU 10 evaluates and reflects on indicator 7 value of the external resistance between the electrodes, i.e., the electrical resistance of the skin. Location BAHT find the minimum value of the displayed resistance. In the performance of devices without ADC and MCU control electronic unit and control 4 may contain, for example, a known circuit ohmmeter, with indication of the resistance of the switch device.

When switching device in the treatment starts working unit charge 5 and nakopitelya 4 opening generates a pulse of duration tandwhich is the enable signal for the operation of the correlator 6, or when the construction of the correlator 6 to the circuit of Fig. 3 - directly corresponding sequence of control pulses transistor keys 19a and 19b. Power is transmitted in the active electrode 1, is determined by the circuit parameters of the device and the voltage Uwith. It is approximately constant and varies during the pulse heating by a simple exponential law, which can be taken into account when setting time tandrequired for heating of the active electrode to the desired temperature.

The maximum temperature and the time intervals between pulses are set by the operator. The constancy of the energy for each pulse heating of the active electrode 1, is ensured by constant values of tandand recovering the desired voltage Uwithon the capacitor 3 in the intervals between pulses. The necessary precision values Uwithcan be provided feedbacks in the internal control circuits of block 5 or due to feedback through the ADC 9 and 10 MPa, if the unit of charge 5 performed by the circuit of Fig. 2 and the control unit and control 4 contains ADC and MCU. PEFC is a transistor switch 17 unit charge 5, at the end of which ADC 9 measures the achieved voltage at the storage capacitor 3, and the measured value of the MCU 10 calculates the number of additional pulses recharging. The cycle of charging - control - calculating the number of additional pulses is repeated to achieve a given potential Uwith, then a ready device. The MPU 10 generates the next pulse heating of tandafter a set by the operator of the time interval between pulses when there ready.

In the proposed device can also be implemented algorithm for adjusting energy of thermal pulse on the amount actually spent on electrical energy. Because during the pulse heating unit charge 5 is disabled, the magnitude of this energy can be determined by the change in the voltage at the storage capacitor 3. At the end of the heat pulse ADC 9 measures the voltage UC2remaining on the storage capacitor 3, and on the known values of UwithUC2and the known capacitance of the capacitor 3 and the efficiency of energy conversion, recorded in the memory of the MPU 10 when programming, the MPU 10 calculates led the.

The proposed device provides greater power of the heating filament resistance of the active electrode and thereby minimizing the duration of a pulse of heat tandand minimization of heat losses on non-productive overheating of the electrodes, in which is mounted a filament. Heat loss by heating of the electrodes is defined by the ratio of the values of tandand the time constant of the cooling electrodethe OHLdefined heat capacity, density and thermal conductivity of the material of the thread, as well as its length.

For strands of steel wire with a length of 3 mm and a diameter of 0.2 mm, mounted in a massive heat the electrodes, the value ofthe OHLapproximately 0,065 with, and the electrical resistance of about 0.1 Ohm. For heating it to a temperature Tn= 150 - 750oC energy Enthe order of 0.04 to 0.2 j.

You can show /A. N. Tikhonov, A. A. Samara. Equations of mathematical physics. M., Nauka, 1966, 724 S./ that in General, when the electric heating yarn at a uniform volume of heat dissipation and heat sink temperature in the center of the filament will vary according to the law

T(0,t) = Tmax[1-exp(-t/the OHL)], (1)

where Tmax- templecon temperature measured from room, taken as zero.

At the beginning of the heating temperature varies linearly in time and in full pulse heating of tandthe OHL= 5 MS, the dependence (1) is almost linear, the loss of energy to heat in the electrodes will not exceed 5%, and the linearity versus temperature pulse duration will not exceed 10%.

For such rapid heating medium power electrical pulse should be W = 40 W, the average current I = 20 amps, the voltage drop on the threads U = 2 Century When the transformation ratio m = 0,1 pulse correlator 6, built according to the scheme of Fig. 3, to the input of the correlator 6, it is necessary to apply voltage V = 20, while power consumption input current (current of the charge storage capacitor 3) is 2 A.

The minimum allowable time interval between two successive thermal pulses is determined by the cooling time of the heater to a temperature below the pain threshold, i.e. below 80oC, which corresponds to the excess temperature 50oC. Because the electrodes are attached the ends of the wire heater, virtually no heat for the duration of the electrical pulse, the temperature can be considered constant ireva can be considered purely exponential:

T(t) = Toexp(-t/the OHL), (2)

where T0the maximum temperature thread.

At time t = 3the OHL, i.e., less than 200 MS (in contact with the BATthe OHLwill be reduced due to the heat sink through the side surface of the thread), excessive temperature will decrease by 20 times. Therefore, the device may increase the frequency of the pulse supply heating at least up to 5 Hz. At lower maximum temperatures and effective heat sink for the BATH frequency of incoming pulses can be increased further.

To ensure the pulse repetition rate 10 Hz, with a pulse energy Enmah= 0,2 j in need of a good power supply is 2 W, and taking into account the real efficiency of the Converter is not more than 3 watts.

The security of the device is determined by the absence of voltage sources to a dangerous extent, and with the exception of a possible injury due to melting of the filaments of the active electrode 1 in contact with the patient. This danger can occur only when using high power intensity in the case of a failure in the management system co-ordinator 6, which will lead to his inclusion on indefinitely. In the proposed accumulated on it energy. During the pulse action of the heat of the capacitor 3 is discharged with a time constant ofp.It can be shown that when the ratio isthe OHL= 3ppulse unlimited duration, maximum temperature, taking into account the decreasing time power intensity and increasing heat transfer to the electrodes, will be achieved at time tmax= 1,1p. However, she 1.64 times higher than the temperature reached by the time of 0.3p= 0,1the OHL. Thus, if the maximum temperature is reached at time t = 0,1the OHLshould be 750oC, even in the case of the above-mentioned failures in the control system, the maximum temperature of the filament will be 1230oC, which is below the melting temperature of stainless steels (>1400oC).

This ratio times the cooling threadthe OHL, capacitor discharge pand the maximum duration of the heat pulse tandcorresponds to the fact that for time tandstorage capacitor 3 is discharged not more than 30%, which is valid for the amplitude of low-frequency variable component of most modern high-capacity capacitors.

Estimates show that the total efficiency of the inventive device p energy conversion. In this case, the total energy for a series of 200 pulses maximum energy En= 0,2 j is less than 55 j. The electrodes of a resistive heater when the weight of 10 g to warm up for about 1oC. it follows that the whole device provides high performance, and in the case of the power supply compact rechargeable battery - long-lasting autonomy. So, four series-connected element capacity to 0.9 Ah will provide a voltage of 4.8 V and the total energy more than 15.5 kJ. Low power consumption characteristic of the microprocessor ADC 9 and 10 MPa. Typical current consumption of such microprocessors are less than 10 mA at a supply voltage of about 10 C. When the total current consumption of the block elements electronic control 20 mA and intensity of the work 20 of a series of impulses per hour (series 200 pulses maximum power) battery battery life battery exceeds 10 hours, which is comparable with the duration of the working day.

The proposed device, made on modern element base, provides rapid resistive heating of the active electrode, the wide range and high the th power and injury prevention reflexology treatments for the patient, has a high efficiency of energy use self-contained power unit and thereby solves the problem of increasing the effectiveness of therapeutic effects and ensure long-term autonomy of operation, making it promising for a wide use.

1. Device for acupuncture, including active and passive electrodes, power supply, control unit with display and control unit, characterized in that it is provided with a cumulative capacitor unit charge storage capacitor and a pulse correlator, with the control unit and the control unit are combined in the electronic unit of control that is attached to the indicator, the power unit is connected with a power input unit of charge, the second steward, whose input is connected to the first output unit electronic control, and the output unit charge connected to the first input unit of the electronic control cumulative capacitor and a power input of pulse co-ordinator, the control input of which is connected with the second output unit electronic control, and the output from the active electrode, which is connected with the second input unit electronoise, moreover, the active electrode is made resistive.

2. The device under item 1, characterized in that the electronic unit control is executed in the form of paired multi-channel analog-to-digital Converter, the inputs of which are the inputs of the block, and microprocessor devices whose outputs are the outputs of the block.

3. The device under item 1 or 2, characterized in that the resistive active and passive electrodes are connected to inputs of an analog-to-digital Converter and outputs of the microprocessor through the measuring resistor.

4. The device under item 1, characterized in that the unit of charge is made in the form of accumulation device-reset magnetic field energy.

5. The device under item 1, characterized in that the pulse correlator made in the form of a vented cascade with transformer coupling, in which the output winding is connected directly to the resistive active electrode.

6. The device under item 1, characterized in that as an indicator of the selected digital or alphanumeric display, which is connected by bus to the outputs of the microprocessor device.

7. The device under item 1, characterized in that the block Pete is it provided with a switch, established in the circuit block of the charge storage capacitor with the possibility of simultaneous connected to its input to the power supply or external DC source and output respectively to the power input of the pulse correlator or the power supply.

9. The device under item 1, characterized in that it is equipped with a remote manual control, which has at least two contact elements and is connected to a microprocessor-based device.

10. The device according to p. 1, wherein the active resistive electrode, a storage capacitor, the pulse correlator and remote manual control constructively combined in one housing.

11. The device according to p. 1, wherein the active resistive electrode made in the form of a segment of wire of length not more than 3 mm, mounted in holders with high thermal and electrical conductivity.

 

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