Reduction of error and expansion of spatial range of measurement of the electrical field strength sensor

Abstract

Abstract The article is directed to improving the metrological characteristics of the previously investigated multi-element planar electro-induction sensor of the components of the electric field intensity vector. For this purpose, its mathematical model is made and analytic expression is obtained for error taking into account design parameters of sensor responsible for its error in nonuniform field and spatial range of measurement. Using mathematical model, geometric dimensions of sensitive elements of sensor are optimized in terms of minimum error and maximum of spatial measurement range. This allowed the following technical results to be obtained. At optimal parameter b = h/L (h - spacing between edges of sensor and electrode, L-linear dimension of sensor) of sensor error from field nonuniformity does not go out beyond 3% in all spatial range 0 ≤ a ≤ 0.2 (a = L/d; d-distance to field source). Thus, the sensor can be used for measuring at distances from the source of the field d equal to five linear dimensions L (d ≈ 5L).