Method and device for precise counting and measuring the particles

• US 5,946,091 A
• Filed: 04/10/1997
• Issued: 08/31/1999
• Est. Priority Date: 04/10/1997
• Status: Expired due to Term

• Current Assignee: Aleksandr L Yufa, Yelena V. Yufa
• Original Assignee: Aleksandr L Yufa
• Inventors: Yufa, Aleksandr L.
• Primary Examiner(s): Pham, Hoa Q.
• Application Number:
  US08/843,648
• Time in Patent Office: 873 Days
• Field of Search: 356/335-343, 356/244, 356/246, 356/440, 356/441, 356/442, 250/574, 250/576, 250/564
• US Class Current: 356/336
• CPC Class Codes: G01N 15/0205 by optical means
• CPC Class Codes: G01N 15/1404 Handling flow, e.g. hydrodynamic focusing

Abstract

A device provides a precise counting and measuring the particles and includes a capillary particle flow system, comprising at least one of a plurality of capillary particle flow channels, the axes of which intersect each other and a light beam at a point, belonging to the focus of the particle detecting system. Each capillary particle flow channel is intended for the passage of the predetermined size particles. A device also includes the synchronously operating blower and purger, the inlet and outlet filters, a control system, and the extended inlet and outlet particle flow tubular systems, the valves, providing a synchronous connection of the appropriate capillary particle flow channels to the inlet and outlet executive systems.

Claims

1. A method for counting and measuring particles illuminated by a light beam, said method comprising the steps of:

providing a particle detecting system, having a particle monitoring region and including a capillary particle flow system, comprising a plurality of capillary particle flow channels formed by an adequate plurality of capillary particle flow means;

directing said light beam toward said particle monitoring region so that said particles are monitored in said particle detecting system;

providing each of said plurality of capillary particle flow means with an appropriate cross-sectional inside dimensions for a passage of an appropriate predetermined size particles;

providing an intersection of an axis of each of said plurality capillary particle flow means with an axis of said light beam at a point within said monitoring region; and

sensing a light created by said intersection of said light beam with said particles flowing through at least one of said plurality of capillary particle flow means, and providing an output which is effectively indicative of the size of said particles.

2. The method of claim 1, wherein said particles are selected and sorted into the predetermined size particle flows by a particle inlet filtration.

3. A device for counting and measuring particles illuminated by a light beam, said device comprising:

a particle detecting system, having a particle monitoring region and including a capillary particle flow system, comprising a plurality of capillary particle flow channels formed by an adequate plurality of capillary particle flow means, each of which has an appropriate cross-sectional inside dimensions for a passage of an appropriate predetermined size particles through said particle monitoring region;

wherein an axis of each of said plurality of capillary particle flow means intersect each other at a point within said particle monitoring region;

a light beam source providing a light beam through said particle monitoring region so that said particles are monitored in said detecting system;

wherein an axis of said light beam intersects the axes of said plurality of capillary particle flow means at said point within said particle monitoring region; and

a sensing means, including a light detection means, detecting a light created by said intersection of said light beam with said particles flowing through at least one of said plurality of capillary particle flow means, and providing an output which is effectively indicative of the size of said particles.

4. The device of claim 3, wherein said capillary particle flow system is interchangeable with the other adequate capillary particle flow systems intended for a passage of other size particles.

5. The device of claim 3, wherein each capillary particle flow means of said plurality of capillary particle flow means is divided into a capillary inlet particle flow means and a capillary outlet particle flow means, axes of which are coincident, and wherein the division of said capillary particle flow means is occurred in an area of said point within said particle monitoring region.

6. The device of claim 5, wherein the plurality of capillary outlet particle flow means further is presented by a singular outlet particle flow means.

7. The device of claim 3, wherein said device for counting and measuring particles further comprises:

an entrance particle flow tubular means, coupling a blowing means with an outside environment;

an extended entrance particle flow tubular means, coupling said blowing means with a valved means through a flow measuring means;

a plurality of inlet filters of an inlet filtrating means, each of which provides selection and sorting of said particles into an appropriate predetermined size particle flow;

a plurality of extended inlet particle flow tubular means, coupling said valved means with an appropriate plurality of capillary particle flow means through said plurality of inlet filtrating means;

a plurality of extended outlet particle flow tubular means, coupling said valved means with said appropriate plurality of capillary particle flow means directly;

an extended exit particle flow tubular means, coupling said valved means with an outlet filtrating means through a purging means;

an exit particle flow tubular means, coupling said outlet filtrating means with said outside environment; and

a control system electrically connected to said blowing means, said flow measuring means, said valved means, said particle detecting system, and to said purging means.

8. The device of claim 7, wherein said blowing means operates synchronously with said purging means.

9. The device of claim 7, wherein said valved means comprises:

a standing means connected with a plurality of channel inlet particle flow tubular means and with an adequate plurality of channel outlet particle flow tubular means;

a switching means connected with an inlet particle flow tubular means and with an outlet particle flow tubular means; and

at least one of a plurality of directors, bonding said standing means with said switching means.

10. The device of claim 9, wherein said switching means is shifted at an appropriate position for a subsequent synchronous connection of an appropriate channel inlet particle flow tubular means with said inlet particle flow tubular means and an appropriate channel outlet particle flow tubular means with said outlet particle flow tubular means, providing the passage of the appropriate predetermined size particles by the appropriate capillary particle flow means of the appropriate capillary particle flow channel through the particle monitoring region of the particle detecting system;

wherein said subsequent synchronous connection is provided by a shifting of said switching means at a final connecting position.

11. The device of claim 9, wherein said standing means further is connected with said inlet particle flow tubular means and with said outlet particle flow tubular means, and said switching means further is connected with said plurality of channel inlet particle flow tubular means and with said plurality of channel inlet particle flow tubular means.