RU2083237C1 - Apparatus for subjecting biological objects to effect of electric field - Google Patents

Abstract

FIELD: medical engineering; agriculture. SUBSTANCE: proposed apparatus comprises main pair of electrodes and plurality (N-1) of auxiliary pairs of electrodes spatially arranged symmetrically to common axis and connected with energy supply source via commutator which alternately connects respective pairs of plate-like electrodes with source. Apparatus also comprises transformers, secondary windings of which are pair-wise connected with corresponding electrodes, while their primary windings are energized by sine-wave (or square) signals issued by generator and shaped by phase shifter. EFFECT: possibility to subject biological objects to effect of electric fields ranging from infralow to high frequencies. 3 cl, 4 dwg

Description

 The invention relates to medical and agricultural equipment, in particular, to devices for exposure to biological objects by an electric field.

 Known devices for exposure to biological objects by an electric field, for example, a device [1] containing capacitor plates arranged parallel to each other and connected to the terminals of a power source, creating an ultrahigh-frequency electric field penetrating a biological object. The closest in design to the claimed device is a capacitor chamber [2] made in the form of two capacitor plates located in space in parallel and connected to the terminals of the power source, creating an infra-low-frequency electric field acting on a biological object.

 However, these devices have limited functionality, since they do not allow, in particular, to change the direction, frequency, intensity and other parameters of the electric field.

 The aim of the invention is to remedy these disadvantages.

 This goal is achieved in that a device for applying an electric field to biological objects, containing a pair of electrodes connected to the terminals of the power source and located in space on opposite sides of the biological object (N-1) with pairs of electrodes located in space uniformly around the circumference symmetrically to the common axis . Each of the N pairs of electrodes is alternately connected through the switch to the terminals of the power source.

 In a particular case, the electrodes are made in the form of capacitor plates mounted in space symmetrically to the common axis and forming a chamber in which the biological object to be processed is placed.

 New is the fact that in one embodiment the device is equipped with transformers, the secondary windings of which are connected to each pair of electrodes, and the primary windings are connected through the phase shifter to the terminals of the power source.

 In FIG. 1 shows a device for applying an electric field to biological objects, containing two pairs of plates located symmetrically to a common axis in the form of a camera and connected to a power source through a switch; in FIG. 2 is a general view of a chamber containing N pairs of electrodes; in FIG. 3 a device for applying an electric field to biological objects, containing three pairs of plates, fed from a generator through a phase shifter using transformers; figure 4 is a graphical representation of the signals coming from the phase shifter.

 In one embodiment (Fig. 1), a device for applying an electric field to biological objects contains two pairs of electrodes 1-1, 2-1 and 1-2, 2-2, located on opposite sides of the biological object (not shown in Fig.) symmetrically to the common axis 3. The electrodes are made in the form of capacitor plates. The taps 4 from the electrodes are connected to the corresponding pairs of fixed contacts 5-1, 5-2 and 6-1, 6-2 of the switch 7. A pair of sliding contacts 8.9 diametrically located on the insulating cylinder 10 is connected to the terminals of the DC power source 11.

The device operates as follows. When connecting the sliding contacts to the power source, each of them receives charges with opposite signs. The sliding contacts, closing on the fixed ones, transfer opposite charges along the taps to a pair of electrodes, which causes the appearance of an electric field between them, penetrating the biological object located between the plates. The direction of the field is perpendicular to the plane of the plates. At the next point in time, the sliding contacts switch to the second pair of fixed contacts, while an electric field similarly arises between the corresponding electrodes, the direction of which is also perpendicular to the plane of the plates and changed by 90 ^o relative to the previous moment of closure.

 In the device, containing N pairs of electrodes, at each contact closure, the field direction, while maintaining the perpendicularity of the plane of the plates, changes by an angle equal to 360 / 2N with a given frequency ω. Thus, an electric field is formed, acting on a biological object, rotating with a given frequency w. Changing the frequency allows you to create an electric field in the range from infralow to high frequencies.

 The design of the electrodes can be any, for example, in the form of plates, tubes, rods, etc. and application materials are not protected.

 In FIG. 3 shows a variant of the device for applying electric current to biological objects, containing three pairs of plates 1-1, 2-1, 1-2, 2-2, and 1-3, 2-3 connected by taps 4 in pairs to the secondary windings 12, 13 , 14 transformers.

 The primary windings 15, 16, 17 are connected to the outputs of the phase shifter 18, which in turn is connected to the generator 19.

 The device operates as follows. Sinusoidal (or rectangular) voltage from the output of the generator is supplied to the phase shifter, which with a certain delay directs it to the primary windings of the transformers, in the secondary windings of which, due to inductive coupling, EMFs are generated, which lead to the appearance of opposite pairs of charge plates of opposite signs. The electric field vector formed by the charges penetrates the space of the chamber with the biological object inside it, rotating with the frequency set by the generator.

Claims (3)

 1. A device for applying an electric field to biological objects, containing a pair of electrodes connected to the terminals of the power source and located on opposite sides of the biological object, characterized in that it is equipped with additional pairs of electrodes located in space uniformly around the circumference symmetrically to the common axis, forming a chamber into which the biological object being processed is placed, and connected together with the main pair of electrodes to the terminals of the power source.  2. The device according to p. 1, characterized in that the electrodes are in the form of plates and are connected to the terminals of the power source through a switch configured to alternately connect each pair of plates individually to the terminals of the power source.  3. The device according to p. 1, characterized in that it is equipped with additional transformers, the secondary winding of which is connected by its terminals to the corresponding electrodes of each pair, and the primary winding is connected through the phase shifter to the terminals of the power source.

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