Measurement of solid particle concentration in a fluid stream re

Details Measurement of solid particle concentration in a fluid stream re Measurement of solid particle concentration in a fluid stream re

1995-09-25

1997-07-01

Wieder, Kenneth A.

Electricity: measuring and testing

A material property using electrostatic phenomenon

Frictionally induced

324 711, 7386104, G01N 2760

Patent

active

056442416

ABSTRACT:
Apparatus for measuring concentration of solid particles in a fluid stream that includes a probe for disposition in the fluid stream to provide an electrical probe signal as a triboelectric function of concentration of solid particles in the fluid stream. A first circuit is coupled to the probe for providing a first electrical signal as a proportional function of the probe signal. A second circuit is coupled to the probe for providing a second electrical signal as a function of rate of change of the probe signal. Differential amplifiers received the first and second signals, and provide a third signal as a function of a difference therebetween. An apparatus output signal is provided when such difference exceeds a preselected threshold.

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