2 NEW DESIGNS OF FIELD MILL TYPE FIELDMETERS NOT REQUIRING EARTHING OF ROTATING CHOPPER

被引：42

作者：

CHUBB, JN

机构：

[1] John Chubb Instrumentation, Unit 30, Lansdown Industrial Estate, Cheltenham, Gloucester, Gloucester Road

来源：

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 1990年 / 26卷 / 06期

关键词：

Electrostatics - Microelectronics - Static Electricity;

D O I：

10.1109/28.62405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Conventional “field mill” instruments for measuring electric fields use an earthed rotating chopper to modulate the observed electric field at a sensing surface. Reliable earthing of the chopper presents problems in instruments for long-term continuous electric field monitoring and in instruments using high-speed rotors to provide a fast response. The two new designs of “field mill” described avoid the need for earthing the rotating chopper: the first uses a second fieldmeter section to measure and compensate for the voltage on the rotor of the primary section; the second uses a constant-capacitance rotor arrangement with capacitive pick up of the electric field modulated signal at the rotor. The two new designs offer a measurement performance approaching conventional field mill instruments but which is stable in high-speed and long-term continuous operation. © 1990 IEEE

引用

页码：1178 / 1181

页数：4