SU480967A1 - Device for determining the density of electric current in electrolytes - Google Patents

Description

one

The device relates to a measurement technique and can be used to measure the values of the density of electric current in electrolytes of any composition.

The known device for determining the density of electric current in electrolytes works on the principle of measuring the magnetic field created by the current flowing in the volume of electrolyte enclosed in a horizontal cylinder with a calibrated cross-sectional area through two toroidal magnetic conductors with windings.

Moreover, the magnetic cores are placed coaxially at some distance, placed in a cylindrical magnetic screen and filled with a chemically inert material, for example, polystyrene.

To eliminate the influence of the magnetic field of the electrolyte surrounding the sensor from the outside, and the chemical effect of the electrolyte on the sensor in the proposed device, along the longitudinal axis of the sensor, a hole with a calibrated cross section is made symmetrically relative to the internal window of the magnetic cores, which serves for the flow of electrolyte.

Thus, the sensor is part of a magnetic amplifier, in which the electrolyte column plays the role of the primary winding and the primary current.

Pa figs. 1 shows the structure of the sensor; FIG. 2 - electrical circuit of the sensor.

Pa figs. 1 and 2 are designated: 1 - electrolyte. 2; - magnetic cores, 3 - magnetic amplifier windings (Wz - working winding. We - magnetic amplifier bias winding), 4 - magnetic screen, 5 - insulation, 6 - sensor leads to a magnetic amplifier and indicator, 7 - electrodes, 8 - galvanic bath.

In operation, the sensor is immersed in the electrolyte between the electrodes in a galvanic bath so that the axis of the 0 D opening is perpendicular to the planes of the electrodes. Through the electrolyte column, enclosed in a calibrated hole 0 D, a current flows

/. 3S,

where b is the average current density in the electrolyte, A / m2;

5 - hole cross section area 0Д m. It is known from the theory of DC transformers (as a first approximation):

/ g

where / 1 is the current in the sensor hole, equivalent to the primary winding Wi of the DC transformer, Wi is the number of turns of the primary winding of the DC transformer; 2 - the number of turns of the secondary working windings of the transformer of direct current. / 2 - current of the secondary windings of the sensor.

.t- Thus, a current / 2, proportional to the current density in the electrolyte, is removed from the sensor output: b with a calibrated and constant cross-section S of the sensor hole 0D. The current I / 2 passing through the magnetic amplifier is measured by an indicator whose scale is calibrated in units of current density.

Subject invention

An apparatus for determining the density of electric current in electrolytes, comprising a transformer sensor, characterized in that, in order to make it possible to measure the density of direct current in electrolytes, the sensor is designed as a magnetic amplifier with spaced toroidal cores placed in a cylindrical magnetic screen with a calibrated hole, symmetrical window cores.

8 FIG. J