SU1337831A1 - Instrument transducer of electric field intensity in conducting media - Google Patents

Abstract

The invention can be used to measure the electric field intensity at small measurement bases during geophysical surveys in wire searching environments, in metrology and scientific research. The purpose of the invention, an increase in measurement accuracy, is achieved by increasing the signal taken from the measuring electrodes. For this, the measuring base is made in the form of a dielectric body 4 of a spherical shape with through Holes 5 on the surface. The holes 5 are located on a common axis of symmetry with measuring electrodes 1 and 2. The drawing also shows a dielectric partition 3, internal cavities 6-1 and 6-2 filled with a conductive medium, an interrupter 7, for example, a hydraulic switch, an executive and measuring blocks 8 and 9 respectively. The proposed transducer eliminates the additional distortion in the conductive medium from the structural elements and makes it possible to improve the measurement accuracy at small measurement bases. 1 il. (L

Description

1133

The invention relates to electrical measuring technique and is intended for measuring the electric field intensity at small measurement bases during geophysical surveys in conducting media, in metrology and scientific research.

The aim of the invention is to improve the accuracy of measurements of the voltage of an electric field in a conductive medium at small measurement bases by increasing the signal taken from the measuring electrodes.

The drawing shows a transducer circuit.

The voltage transducer of the electric field in a conductive medium contains measuring electrodes 1 and 2, a dielectric partition 3, a spherical dielectric body 4 with through holes 5 and internal cavities 6-1 and 6-2 with a conductive medium, ) 7, executive unit 8 and measuring unit 9.

The measuring transducer of the intensity of the electric field in a conducting medium works as follows.

When a dielectric body of spherical shape is placed in a conducting medium in which there is a stationary electric field, the conduction of the body around the body occurs, i.e. distortion of the structure of a homogeneous gender. This phenomenon is used to form a measuring base equal to 3 / 2D, where D is the diameter of the sphere, and the direction of the measuring base coincides with the common axis of symmetry of the through holes and the measuring electrodes. Thus, if we assume that there are potentials at the points of the through holes 5 i and t /, then the signal and, taken from the measuring electrodes, is determined by the expression

and

1. - 1 Ep 2 DCOS O1 ± EH

Ep is the vector of electric field strength in conducting medium,

c is the angle between the direction of the electric field strength vector 55 and the direction of the measuring base;

 - proper EMF of a pair of measuring electrodes.

- YO 15

20 2b

thirty

oh 35

50

th

- 55 m

Before starting the measurements, the interrupter (hydraulic switch 7) is set to the Open position with the help of the actuating unit 8, while the internal cavities 6-1 and 6-2 filled with conductive medium are closed and the measuring electrodes 1 and 2 are short-circuited through a small resistance of the conductive medium electrodes. In this case, the measuring base is close to zero and at this moment the own EMF of the electrodes is compensated for in the measuring unit. Then, the interrupter (for example, a hydraulic switch) 7 with the aid of the actuating unit 8 is closed and the signal proportional to the magnitude of one of the components of the intensity vector of the electric field in the conductive medium is detected and recorded in the measuring unit 9. for example, an electric motor with a gearbox connected to a power source.

The proposed transducer eliminates additional distortion in the conductive medium from the structural elements and allows to increase the accuracy of measurements at small measurement bases.

Claims (1)

Invention Formula The measuring transducer of the intensity of the electric field in a conductive medium containing measuring electrodes separated by a dielectric partition with a chopper, for example, a hydraulic key connected to the actuator and placed inside the dielectric body, is characterized in that, in order to increase the measurement accuracy due to increase in the signal taken from the measuring electrodes, the measuring base is made in the form of a dielectric body of spherical shape with through holes surfaces located on a common axis of symmetry with the measuring electrodes.