Apparatus and method for measuring particles in polydispersed systems and particle concentrations of monodispersed aerosols

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United States of America Patent

PATENT NO 5214386
SERIAL NO

07589668

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method and apparatus useful in measuring the size, charge, velocity and concentration of particles in polydispersed systems, and particle concentrations of monodispersed aerosols. A particle flow to be evaluated is conducted through at least one active electric field sensor, which may be constructed in an annular, point, or segmented annular configuration. The charge induced by each particle on the sensor is fed to an active charge amplifier. The output signal of the amplifier serves as input signal for a measured value indicator. The amplifier is a component for a measured value evaluation circuit, which consists of at least one capacitor, one resistor and the amplifier and, which is preferably integrated into the arrangement of the sensor. A computer or microprocessor is used in analyzing the sensor output to determine desired parameters descriptive of the particles and their movement. The particle flow may be charged prior to measurement and the particles may also be separated according to charge.

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Patent Owner(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rossner, Michael Haldesdorfer Strasse 158, 2000 Hamburg 71, DE 1 31
Singer, Hermann Luettendamm 9, 2000 Stapelfeld/Hamburg, DE 1 31

Cited Art Landscape

Patent Info (Count) # Cites Year
 
THE UNIVERSITY OF WESTERN ONTARIO (1)
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MATTER + SIEGMANN AG (1)
* 4837440 Method and apparatus for characterization of aerosols 47 1986
 
KANZAKI PAPER MANUFACTURING CO., LTD. (1)
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VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT NERUDNYKH STROITELNYKH MATERIALOV GIFDROMEKHANIZATSII (1)
* 4556849 Apparatus for measuring the grain-size composition of powders 10 1983
 
Sentech Corporation (1)
* 4910463 Halogen monitoring apparatus 19 1987
* Cited By Examiner

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* Cited By Examiner