Static characteristics of an electrostatic flow probe

Abstract

This paper is a subsequent one in a series of papers on the metrological properties and characteristics of an electrostatic (inductive), non-contact probe or the whole measuring system consisting of a measuring head with this probe in its inside and an analog or digital measuring instrument connected with the probe [Gajewski, Meas. Sci. Technol. 7 (1996) 1766; J. Electrostat. 40&41 (1997) 437; J. Electrostat. 45 (1999) 255; J. Electrostat. 46 (1999) 271]. The probe and measuring system are intended for the measurement of the mass flow rate, volume concentration (or solids loading), and the net electric charge, as carried on solid particles during pneumatic conveying. The static characteristics of the probe are shown, which were obtained experimentally using a certain simulation experiment on a real measuring head and the probe, and numerically for an equivalent electric circuit of the probe after computer simulation had been done. The results are presented and they reveal that the experimental ones are in good agreement with those of computer simulation of a real metrological process and instrumentation.