Detection Signal Analysis for Passive Proximity Detection System Based on Theory of Capacitance

Since it is crucial to design the oscillator in the signal processing modules for generating the robust detection signal for the passive proximity detection system and the system detects targets through generating quasi-electrostatic field, this paper analyzes the detection signal of a passive proximity detection system based on capacitance theory is analyzed. Further, the generation mechanism of detection signal is described by the analysis of electromagnetic feature for three conductors. The simulation experiments indicate the core of related module, and describe the characteristic of the output of frequency discriminator under different intersection angles.