Noncontact charge measurement of moving microparticles contacting dielectric surfaces
| Autor: | Frank Breitling, Michael Hausmann, Volker Lindenstruth, Volker Stadler, Felix Löffler, Ralf Bischoff, Alexander Nesterov, Klaus Leibe, Thomas Felgenhauer, U. Trunk, Kai König |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Surface Properties Static Electricity Reproducibility of Results Charge (physics) Mechanics Dielectric Equipment Design Laser Electric charge Sensitivity and Specificity Microspheres law.invention Equipment Failure Analysis Complex geometry Flow (mathematics) law Materials Testing Electrochemistry Particle Particle flow Instrumentation |
| Zdroj: | The Review of scientific instruments. 78(7) |
| ISSN: | 0034-6748 |
| Popis: | In this study examples for a noncontact procedure that allow the description of instant electric charging of moving microparticles that contact dielectric surfaces, for instance, of a flow hose are presented. The described principle is based on the measurement of induced currents in grounded metal wire probes, as moving particles pass close to the probe. The feasibility of the approach was tested with laser printer toner particles of a given size for different basic particle flow and charging conditions. An analytic description for the induced currents was developed and compared to observed effects in order to interpret the results qualitatively. The implementation of the presented procedure can be applied to transparent and nontransparent particle containers and flow lines of complex geometry which can be composed from the presented basic flow stream configurations. |
| Databáze: | OpenAIRE |
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