Effect of electrode number on the operating range of capacitance proximity fuze

To define which detect electrode type between two elecrodes and three elecrodes can extend the operating range of capacitance proximity fuze, took sphere as elecrode, and equivalent sphere models of two and three elecrodes were established. The mirror method and Ansoft Maxwell microsoft were used to calculate the capacitance value of the model, then got the figure of capacitance-missile target distance. Based on this, Matlab was used to calculate the oscillator frequency, and got the fiure of frequency-missile target distance. According to the capacitance value and oscillator frequency, got the figure of capacitance changes-missile target distance and the figure of frequency changes- missile target distance. By comparing the frequency changes of the two electrodes with the changes of the three electrodes, draw the conclusion that the changes of three electrodes type are bigger than the ones of two electrodes type, so three electrodes type is better than the the two electrodes type to extend the operating range.