Two-component spherical dual-type electric field strength sensor

Abstract

Simple and easy-to-use modern sensors are required to monitor the levels of electric field strength around high-voltage power equipment, power lines, substations. These sensors ensure safety and labour protection of power equipment maintenance personnel. Therefore, the development of electric field strength sensors is an important and urgent task. The article proposes one of the possible options for constructing such sensors. The sensor is a two-component spherical dual-type element. Twelve biangular spherical conductive electrodes are placed in isolation on the spherical conductive surface of the sensor. The electrodes serve to form the sensitive elements of four dual sensors: two on each coordinate axis. Moreover, the dimensions of the sensor sensitive elements affect its error caused by the inhomogeneity of the field. The dual spherical sensor has a variable error: not exceeding ± 1,1 % in the 0 £ a £ 1 entire spatial range, which corresponds to the d = R minimum distance to the field source. The error of the sensor is provided by reasonably selected angular dimensions of twelve bi-angular spherical electrodes of the a₀ = 90 º and b₀₁ = 30 º sensor basic. The sensor has three outputs on each coordinate axis, two corresponding to single sensors and one to a dual sensor. This type allows expanding the sensor's functional features. The dual spherical sensor is used for control and measurement means of electric field parameters of industrial frequency in high-intensity zones.