Design of Electrical Conductivity Instrument Based on Pulse-Width Adjustable Bi-directional Pulsed Voltage

Author

Lingfang, Sun ; Ce, Xu ; Jichang, Li ; Shouguo, Wang ; Yuheng, Zhang

Author_Institution

Sch. of Autom. Eng., Northeast Dianli Univ., Jilin, China

Volume

5

fYear

2009

fDate

March 31 2009-April 2 2009

Firstpage

66

Lastpage

70

Abstract

Based on the improved bi-directional pulsed voltage method, a kind of new on-line electrical conductivity instrument was designed. By using the bi-directional pulse-width adjustable voltage as excitation source, the instrument can adjust width of pulsed voltage automatically according to different solution to eliminate capacitance effect and weak polarization effect. Instrument´s hardware is composed of bi-directional pulsed voltage generating circuit, range switching circuit, wave conversion circuit and A/D conversion circuit. The application software develops with LabVIEW and C51 assembler language. The instrument can realize many functions, such as system calibration, data processing, display and storage, and its relative error is less than 2.8%.

Keywords

analogue-digital conversion; assembly language; calibration; capacitance; electrical conductivity measurement; electronic engineering computing; switching circuits; A-D conversion circuit; C51; LabVIEW; assembler language; bi-directional pulsed voltage method; capacitance; data processing; excitation source; on-line electrical conductivity instrument; range switching circuit; system calibration; wave conversion circuit; weak polarization; Bidirectional control; Capacitance; Conductivity; Hardware; Instruments; Polarization; Pulse circuits; Pulse generation; Space vector pulse width modulation; Voltage; Bi-directional pulsed voltage; Electrical conductivity; LabVIEW; pulse-width adjustable;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Science and Information Engineering, 2009 WRI World Congress on

Conference_Location

Los Angeles, CA

Print_ISBN

978-0-7695-3507-4

Type

conf

DOI

10.1109/CSIE.2009.679

Filename

5170498