A Semi-Cylindrical Capacitive Sensor with Signal Conditioner for Flow Meter Applications

Author

Chiang, Cheng-Ta ; Huang, Yu-Chung

Author_Institution

Nat. Chiao Tung Univ., Hsing Chu

fYear

2006

fDate

22-25 Oct. 2006

Firstpage

1139

Lastpage

1142

Abstract

In this paper, a semi-cylindrical capacitive sensor with signal conditioner for flow meter applications is newly proposed. The numerical analysis method to calculate the capacitance of the semi-cylindrical capacitive sensor is analyzed and discussed. The pF-range capacitive variation of the semi-cylindrical capacitive sensor can be detected and converted into voltage variation by the signal conditioner. Besides, the signal conditioner is compact to simplify the circuit complexity, and could be easily implemented for flow meter applications. All the functions of the signal conditioner for flow meter applications are tested and proved through HSPICE simulation. Measurement results have successfully confirmed the correct functions and performance of the semi-cylindrical capacitive sensor with signal conditioner for flow meter applications, which ranges from 0.136 to 4.746 L/min, on the LCD panel coating machine.

Keywords

capacitive sensors; flowmeters; signal processing equipment; HSPICE simulation; LCD panel coating machine; flow meter applications; numerical analysis method; pF-range capacitive variation; semi-cylindrical capacitive sensor; signal conditioner; voltage variation; Capacitance; Capacitive sensors; Circuit simulation; Circuit testing; Coatings; Complexity theory; Dielectrics; Fluid flow measurement; Numerical analysis; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2006. 5th IEEE Conference on

Conference_Location

Daegu

ISSN

1930-0395

Print_ISBN

1-4244-0375-8

Electronic_ISBN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2007.355827

Filename

4178822