Electrospinning origins from that electrically charged fluid is forced jets in the high voltage electrostatic field . electrospinning occurs when the electrical forces at the surface of a polymer solution or melt overcome the surface tension and cause an electrically charged jet to be ejected . when the jet dries or solidified , an electrically charged fiber remains 电纺丝技术是基于高压静电场下导电流体产生高速喷射的原理发展而来，其基本过程是：聚合物溶液或熔体在几千至几万伏的高压静电场下克服表面张力而产生带电喷射流，溶液或熔体射流在喷射过程中干燥、固化，并保持一定电荷量，最终落在接收装置上形成纤维毡或其它形状的纤维结构物。
This system is a totally automatic measuring and analyzing system with wide measuring range ( from 10 - 16 to 10 - 2a ) and high precision ( 0 . 2 % ) which is first developed in china . a 50 - loop current measurement and control system , and a micro - current automatically cycling measurement system together with its three - level protecting system are developed in this thesis . additionally , a software package for this measuring system of ion migration test is developed successfully 在对新型绝缘子离子迁移试验测量系统研制和开发的过程中，本文设计并研制出了50路电流测量控制系统，微电流自动循环测量系统及其三级保护系统；并成功地开发出一套离子迁移试验测量系统的软件系统，该软件系统不但简洁、易用，而且实现了采用软件对多个硬件设备的同步、协调控制，以及通过软件对多个（达100个） i / o节点的实时控制，另外，还实现了测量数据的自动存储以及对累积电荷量大小和发展趋势的自动分析功能等。
