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Particle transport and near field analytical detection

a technology of particle transport and near field analytical detection, which is applied in the direction of electrostatic separator, combination device, electrostatic separation details, etc., can solve the problems of increased flow impedance, difficult if not impossible,

Inactive Publication Date: 2007-06-14
PALO ALTO RES CENT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can be very difficult if not impossible if the particles are at relatively low concentration levels in the medium.
However, a mere tapering or constriction in the flow channel is undesirable in that such geometry results in an increased flow impedance.

Method used

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  • Particle transport and near field analytical detection
  • Particle transport and near field analytical detection
  • Particle transport and near field analytical detection

Examples

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Embodiment Construction

[0018] The exemplary embodiment provides strategies and systems for transporting particles, and specifically for selectively directing them to a specific location, such as for example to an analytical device for detecting or otherwise analyzing the particles. Although many of the exemplary embodiments are described in terms of the instrumentation arts, it is to be understood that the exemplary embodiments include other applications involving the storage, transport, or distribution of minute particles, such as for example in the handling of pharmaceutical powders. As described and illustrated herein, many of the exemplary embodiments utilize an electrode pattern that is provided and configured in such a way that in-plane traveling electrostatic fields can be created and controlled. With each electrode separately addressable, the phases and amplitudes of the signals to the electrodes can be used to synthetically approximate any pattern below the Nyquist limit. Generally, the collectio...

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Abstract

Particle collection, transport, and detection systems are disclosed. The systems are uniquely adapted for collecting or concentrating particles from a flowing medium and then transporting the collected particles to a desired location or for subsequent analysis. Electrostatic traveling wave grids can be used in conjunction with sample concentrators.

Description

BACKGROUND [0001] The present exemplary embodiment relates to the detection and transport of small particles. It finds particular application in conjunction with the scientific instrumentation arts, and will be described with particular reference thereto. However, it is to be appreciated that the present exemplary embodiment is also amenable to other like applications. [0002] In many analytical and instrumentation environments it is necessary to detect or obtain measurements of particles that are dispersed throughout a liquid or gas medium. This can be very difficult if not impossible if the particles are at relatively low concentration levels in the medium. This phenomenon can also occur when attempting to detect or measure liquid droplets dispersed throughout a gas medium. Accordingly, there is a need for a system and method to enable or at least improve the detection or measurement of particles or droplets of liquid in a medium. [0003] It is known to utilize a tapered duct or nar...

Claims

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Application Information

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IPC IPC(8): G01N1/22
CPCB03C5/02G01N1/2202G01N15/0656G01N15/1456G01N2015/0042G01N2015/0288G01N2015/149G01N15/149
Inventor BIEGELSEN, DAVID
Owner PALO ALTO RES CENT INC
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