交流ECT测量系统在实际中的应用

The Usage of New AC-based Capacitance Tomography System in Experiment

基于交流充放电系统的电容层析成像测量系统灵敏度高 ,可检测到 0 .0 1p F的电容值 ,误差仅为 0 .0 0 0 2 p F,测量范围宽 0 .0 1至 2 p F,与直流电容层析成像系统相比稳定性好 ,采集速度快 ,可达 15 0幅 / s,实验测量结果与直流系统相比有明显改进。

A new AC-based capacitance measurement circuit has a high sensitive,it could measure as small as 0.01pF capacitance with error 0.0002pF,and could collect tomography image data at more than 150 frames per second.The experiment result is better than the old electrical capacitance tomography(ECT)system.