Selection of method and means of measuring resonant frequency of serial oscillatory circuit

Abstract

When developing a measurement technique for the resonant frequency of a series oscillatory circuit, an important problem is to select the method and means of measurement. In this paper, calculations are carried out with using two methods based on different principles. The first was made by means of the universal bridge (bridge method) with the subsequent calculation of indications, the second - by means of the measuring installation realizing the resonant principle of measurement of frequency. Relative errors were calculated (δ1f = 0.56 % and δ2f = 0.08% respectively) and the confidence intervals of the frequency value were determined for each of the methods. Despite the high labor costs, a method based on the resonance principle was chosen to develop the measurement technique, as it has the necessary accuracy.