Device for magnetotherapy

 

The invention relates to medical technology, and is intended for the treatment of diseases of patients methods magnetotherapy by the integral action of the vector-controlled magnetic homogeneous magnetic field. Vector-controlled magnetic field with an arbitrary rotation of the vector of total tension and an arbitrary configuration is created by a device containing three orthogonal loop, three power amps, three phase modulator, three of the amplitude modulator, three signal generator controlled waveform and frequency, as well as a control device. The device allows you to generate many variations of magnetic field configurations that you can choose the best for therapeutic purposes, the magnetic field for a particular patient, and to change its configuration when the adaptation of the patient to a specific field. 3 Il.

The present invention relates to medical technology, and is intended for integral impact on the patient for therapeutic purposes uniform magnetic vector-controlled magnetic field of arbitrary configuration.

A device for magnetotherapy (patent for invention № 2135228, toregister the and rings Helmholtz three ADCS, three controlled current sources, three DAC, the control unit, adder, comparator codes, the switch, the random number generator.

This device has the following disadvantages:

1. Not possible to generate in the working volume of the device formed by the combination of three pairs of Helmholtz rings, magnetic field, the vector of total tension of which can be described in three-dimensional space trajectory.

2. Not possible to generate in the working volume of the device formed by the combination of three pairs of Helmholtz rings, magnetic field, the module of the vector of the total tension which would change in accordance with the given control law.

3. Not possible to generate in the working volume of the device formed by the combination of three pairs of Helmholtz rings, magnetic field, the vector of total tension which would fluctuate the speed of rotation in space of the working volume in accordance with the given control law.

4. The device is only intended to stabilize variations in the Earth's magnetic field in the working volume and playback. This device patent for invention № 2135228, registered on August 27, 1999, is blijaishego integral effect on the whole human body for therapeutic purposes by a magnetic field, the vector of total tension which changes in three-dimensional space, its trajectory, the module and the rotational speed in accordance with the given control law. Such a device can generate many variations of magnetic field configurations that you can choose the best for therapeutic purposes, the magnetic field for a particular patient, and to change its configuration when the adaptation of the patient to a specific field.

This is achieved in that in a device containing a working volume, the source of the controlled magnetic field, comprising three pairs of mutually orthogonal Helmholtz rings, three current source and the control device, with the windings of each pair of Helmholtz rings associated with the respective current source, each of current sources includes sequentially merged generator controlled waveform and frequency, amplitude modulator, phase modulator and the power amplifier, the output is the output of the current source, while the control unit is configured to set the shape, frequency, and laws of amplitude and phase modulation currents, forming the components of the magnetic field at the coordinates X, Y, Z, and respective outputs connected CR>In Fig.1 shows a functional diagram of the device. The device comprises a working space formed by the system of the 3 orthogonal pairs of Helmholtz rings, windings are connected to the outputs of the power amplifiers (2, 3, 4), the inputs of the amplifiers connected to the outputs of the phase modulators (5, 6, 7), the inputs of the phase modulators are connected to the outputs of the amplitude modulators (8, 9, 10), the input of the amplitude modulator connected to the outputs of the generators are controlled waveform and frequency (11, 12, 13).

The control inputs of the phase modulator (5, 6, 7), amplitude modulators (8, 9, 10), generators controlled waveform and frequency (11, 12, 13) connected to the control device (14) performs the function of the computer.

In the proposed model for magnetic therapy used blocks, performed on a known standard devices, analog and digital technology.

The principle of the generation-managed fields with a given trajectory of rotation of the resultant vector in three-dimensional space can be explained as follows.

The source of the magnetic field is a system consisting of three pairs of mutually orthogonal Helmholtz rings with independent control intensities of the components x, y, z. The total magnetic field, is the law.

In Fig.2 is conventionally shown a three-dimensional system create controlled magnetic fields, where L1, L11a pair of Helmholtz rings, creating a magnetic field along the x coordinate, L2, L21, L3, L31a pair of rings, creating a magnetic field on the coordinate z and y, a i1, i2, i3the currents in the respective coils of the system. As systems are pairs of rings are mutually orthogonal in the intersection, and the corresponding magnetic fields are mutually perpendicular to each other. The latter condition allows mutually independent control of each component on the corresponding coordinate. The resulting tension N within this system (working volume), you can define the vector sum of:

H=i·Hx+j·Hy+k·Hz,

where i, j, k are unit vectors along x, y, z,

HxNyHz- the magnetic fields generated by currents i1, i2, i3flowing through the windings surround contour system of Helmholtz rings (Fig.3).

The magnitude and direction of the total field strength H depend on the magnitude and direction of the components of HxNyHzthat, in turn, are determined by the magnitude and direction of tokuden to use two pairs of rings L1, L11, L3, L31(Fig.2), to the windings of which are connected to the sources of currents varying in accordance with the following:

i1=i01cos(t-1),

i3=i03cos(t-3).

Assume that variations of these currents coherent, i.e., the difference between the initial phases

=3-1=const.

In accordance with these terms and conditions by coordinates x and y will receive the coherent oscillations of the magnetic field in the working volume contour system.

where NOhHoy- the amplitude value of the magnetic field on the appropriate coordinates. Values of HOhNOSdepend on the radius of the Helmholtz rings R, the number of turns N and the force of flowing currents iox, ioy. Deciding together equations (1) and (2), we get:

Expression (3) is the generalized equation of the ellipse determines the trajectory of the total magnetic field intensity vector HHuin the XY-plane.

When mn is giving direct:

Ify-x=/2, equation (3) becomes the equation of the ellipse referred to the coordinates x and y:

For full use of the three-dimensional system of Helmholtz rings necessary for the coils L2, L21skip current i2varying in accordance with the expression

i2=i02·cos(t-z).

Put the condition of coherence of the oscillations of the current in all coils of the three-dimensional system.

Current i2creates the coils L2, L21field:

Deciding together equations (2) and (6), we get:

Whenz-y=/2 equation (7) takes the form:

From equations (5) and (6) we get:

whereb=H0y,

Equation (9) is the equation of an ellipsoid of rotation. In this case, (9) characterizes poverhnosti.

Provided and2=b2=with2=And (9) takes the form of the equation of a sphere:

The shape of the ellipsoid (9) and its geometrical dimensions depend on HOhNOSHozand their relationships. It was concluded that varying the currents i1, i2, i3in the coils of the three-dimensional system, it is possible to change the shape of the ellipsoid, its size.

The oscillation frequency of the currents in the coils does not affect the parameters of the ellipsoid, if it is the same for all components of HxNyHz. In the case of different frequencies (xyz) is a more complicated surface, which moves the end of the vector N.

Equation (9) obtained for the three sinusoidal currents flowing in mutually orthogonal coils of the three-dimensional system. Assume that the phase shift of the oscillations in coordinate of y with respect to x is equal toxy=/2, z relative to y -K=/2.

In this case, the end of the vector HHu=Nxthe ellipse in the plane (yz).

The resulting vector N=NHu+HKtheir end will move across the surface of an ellipsoid of rotation. In a three-dimensional rectangular coordinate system (xyz) in the plane (xy) (yz) there is a third plane (zx). Full characteristic of the bulk state of the field can be represented in the projections on the three planes.

To do this, find the trajectory of the third vector Hzx=Hz+ Hxin the plane (zx). Three vectors HHuHKHzxdetermine the state of the field in each of the three planes. To determine the trajectory of the end of the vector Hzxfind the phase difference between the oscillations of currents on the coordinates z and x, provided that

xy=/2,K=/2.

Fixed values ofxyandKnot allowed to take an arbitrary value of the phase. This is quite obvious and can be formulated as a Lemma: if three oscillations in mutually perpendicular planes (x, y, z) are shifted in phase byzx(coherent oscillations), then one of the values of the phase shifts is always equal to the sum of the other two, for example:

From the condition (11) implies that ifK=xy=/2, thenzx=.

This means that the end of the vector Hzxdescribes in the plane (zx) geometric shape that is different from the ellipse. Prove that, for which we get an equation of the trajectory for the end of the vector Hzxin the plane (zx), using equations (1) and (6):

From equation (11) and conditionsK=xy=/2 we obtain:

From equation (12) and (13) we find that

The resulting expression is the equation of a straight line. This means that in the plane (zx) the trajectory of the end of the vector HzxprovidedK=

Device mode magnetotherapy session works as follows. The patient is placed inside the working volume formed by a set of Helmholtz rings, sitting in a non-magnetic chair or lying on a couch made of nonmagnetic materials. This requirement is due to the fact that the chair or couch made of other materials, will distort the generated magnetic field. After placing the patient control device sets a relative phase shift of the currents forming the components of the magnetic field at the coordinates X, Y, Z, the law of amplitude modulation of the carrier signal frequency (sine, cosine, linear and others), the shape of the carrier frequency (sine, cosine, linear, rectangular, sawtooth, etc.) and the repetition frequency of these signals.

Depending on these parameters and generates a magnetic field of a given configuration and law changes, which affects the patient for therapeutic purposes.

The configuration of the field, it spaces ormula inventions

Device for magnetotherapy, containing a working volume, the source of the controlled magnetic field, comprising three pairs vzaimootnoshenij rings Helmholtz three current source and the control device, with the windings of each pair of Helmholtz rings are connected with the corresponding current sources, wherein each of the current sources connected in series includes a signal generator controlled waveform and frequency, amplitude modulator, a phase modulator and a power amplifier whose output is the output of the current source, while the control unit is configured to set the waveform and frequency, as well as the laws of amplitude and phase modulation currents, forming the components of the magnetic field at the coordinates X, Y, Z, and respective outputs connected to the control inputs of the signal generator controlled waveform and frequency, amplitude and phase modulators.

 

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