智能化电子逸出功测试仪  

An Intelligentize Electron Work Function Measurement Equipment

作　　者：吴汉水[1] 金平[2] 

机构地区：[1]景德镇陶瓷学院,江西省景德镇市333403 [2]东南大学,江苏省南京市210096

出　　处：《电子工程师》2007年第6期22-24,共3页Electronic Engineer

摘　　要：对原有的大学物理实验仪器——金属钨电子逸出功测试仪进行了较大的改进,使其在自动化程度、测量准确性、人机界面等方面有了良好的改善。在作为主要测量部分的电子管阳极电流上采用数字化手段,解决了在大的共模电压下测量微小电流的问题,使仪器的测量精度大为提高。This paper introduces an innovative modification of the electron work function test instrument of tungsten which was conventionally used in college physics laboratory. Such a modification improved the instrument automatic properties, the measurement accuracy, and a better human-machine interface. On the main measurement part, especially the tube anode current measuring, we adopted the digital optical coupling method. This method solves the problem of measuring tiny current under a big common mode voltage in the tube anode current acquisition, also reduces the cost of using isolate amplifier as well as raised instrument measurement accuracy.

关 键 词：逸出功测试仪 智能化 微小电流测量 

分 类 号：TM933.3[电气工程—电力电子与电力传动]