电容探测器探测场分析与仿真

研究了电容探测器的探测场特征.首先以两电极电容探测器为研究对象,依据电磁场理论推导出电容探测器的探测场为一准静电探测场.然后在这一准静电场条件下,对鉴频式和耦合式探测器的探测场域分别进行仿真.仿真结果显示耦合式探测器周围的等势线较鉴频式的密集,且分布区域更广,充分表明耦合式探测器的探测灵敏度较鉴频式探测器的灵敏度更高.

Analysis and Simulation on Capacitance Detector Field

The character of capacitance detector field was studied. First the two-electrode capacitive detector was researched, and it was deduced from electromagnetic theory that the detection field was quasi-electrostatic. Then simulation was made on the detector field of frequency-sensitive model and amplitude-coupling model. The simulation results show that the isopotential lines around the amplitude- coupling detector is much desener and whose distribution is much further, which obviously explains that the amplitude-coupling model is more sensitive than the frequency-sensitive model.