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 本文针对ect系统硬件关键技术做了较为全面深入的研究,并实际开发了一套ect投影数据采集系统的实验装置。主要完成以下工作: 1