耦合式电容引信探测器目标信号特征的理论分析

推导了耦合式电容引信探测器在遇目标过程中电极间等效电容的表达式和等效电容对弹目接近距离r的变化率。分别针对弹体做电极、弹体不接入电路、弹体接电路“地”3种工作模式,进行了探测器动态目标信号特征的理论分析和性能比较。通过对电极间等效电容及其变化率表达式的分析,探讨了提高探测器灵敏度的电极设计思想。还就其动态目标特性曲线进行了讨论。

A Theoretical Analysis of the Characteristics of Target Signals From the Coupling Detector of a Capacitance Fuze

Expressions for the equivalent capacitance of the detecting electrodes in the process of encounterance with a target , and its rate of change versus the distance between the projectile and the target , are derived . For three different kinds of working modes of the detector , i . e ., when projectile body is (1) used as an electrode , (2) not connected to circuit , (3) grounded , theoretical analyses and performance comparisons of the characteristics of the detector' s dynamic target signal are carried out .Through the theoretical analysis of the expression ,the design principle of the electrodes aimed at improvements in the sensitivity of the detector is discussed . Furthermore , characteristic curves of the dynamic target signal are analysed .