Пристрій для дослідження впливу наднизькочастотного поля на біологічні об’єкти

Abstract

Розглянуто питання створення пристрою для формування електричного та магнітного наднизькочастотного (ННЧ) поля випромінювання, який використовувати- меться для дослідження впливу цього поля на живі біологічні об’єкти. Розроблено структурну схему такого пристрою, визначено його основні технічні параметри, розглянуто питання побудови його окремих вузлів.

The question of creation of a device for the formation of an electric and magnetic ultra-low frequency (ULF) radiation field is considered, which in the future will be used to study its effect on living biological objects. The structural scheme of such device is developed, its basic technical parameters are determined. The questions of construction of its separate units are considered. Scientists of the Kharkiv National University named after V. N. Karazin established the effect of microwave radiation on the indicators of cell membrane permeability and cell viability. It is likely that these general indicators also change under the influence of ULF. The study of these indicators will provide information on both the mechanism of impact of ULF on the cell, and on the potential impact on the human body. In this regard, it is important to study the cells of people with a high sensitivity to the action of electromagnetic factors. The application of precision magnetic field generators with wide functional capabilities will increase the accuracy and informativeness of investigations of the influence of an external electromagnetic magnetic field on biological objects. The structural scheme of the device for forming an electric and magnetic field on biological objects is developed. It consists of a control unit, a set generator, a matching amplifier, a quadrature signal former for generating an electric field loaded on static plates, an electromagnetic fieldformer loaded on inductance coils which converts the current that flows through them into an electromagnetic field. The instrument for studying the influence of the ultrashort electromagnetic and electrostatic field on biological objects has been developed. It provides the formation of two quadrature signals with an amplitude of 5 V. The amplitude of the signal varies discretely with a step of 0.1 V. The signal frequency is regulated in the range 10 Hz – 1000 Hz with a step of 10 Hz. The electrostatic field is formed by plates. The capacity of the plates does not exceed 1000 pF. The amplitude of the signal forming the electrostatic field is amplified to 200 V. The electromagnetic field is formed by special coils of inductance, which consist of two windings. Structurally the coils are made on a ferrite core. Coil inductance does not exceed 4 mH. The electromagnetic field is formed by a current flowing through the windings of the coil. For current formation, converter voltage-current is used. The converter is made according to the scheme of the DC amplifier with a deep feedback on the current. Maximum amplitude of current in inductive load at the highest signal frequency is 200 mA.