Continuous non-contact measurement of electric charges of solid particles in pipes of pneumatic transport. I. Physical and mathematical models of a method

Author

Gajewski, Juliusz B.

Author_Institution

Inst. of Heat Eng. & Fluid Mech., Tech. Univ. of Wroclaw, Poland

fYear

1989

fDate

1-5 Oct. 1989

Firstpage

1958

Abstract

Physical and mathematical models are derived from an analysis of moving charged solid particles in pneumatic-transport pipes and their effect on an inductive ring probe (electrostatic transducer). The probe is connected to the high-resistance input of a specially designed amplifier through an electric circuit consisting of a capacitor of a high capacitance value. The effect of the voltage drop on the input impedance of the amplifier is proportional to the electric charge generated on solid particles during a flow in a pipe. The capacitor also makes it possible to attenuate or even eliminate the effect of electrical interference on the charge measurement. The interference results from the charging of a dielectric section of a pipeline by impacting solid particles.<>

Keywords

charge measurement; electric sensing devices; electrostatic devices; flow measurement; transducers; amplifier; capacitor; electric charge measurement; electrical interference; electrostatic transducer; inductive ring probe; measurement theory; models; pipe flow; pneumatic-transport pipes; Capacitors; Circuits; Current measurement; Electric variables measurement; Electrostatic analysis; Electrostatic measurements; Mathematical model; Probes; Solids; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE

Conference_Location

San Diego, CA, USA

Type

conf

DOI

10.1109/IAS.1989.96908

Filename

96908