This dissertation goes deep into research of ect key technique in its hardware designing , such as the design of array of sensing electrode , a high - sensitive ac - based capacitance measuring method , data acquiring system 本文針對ect系統(tǒng)硬件關鍵技術做了較為全面深入的研究,并實際開發(fā)了一套ect投影數據采集系統(tǒng)的實驗裝置。主要完成以下工作: 1