CA2347740A1 - Evaluation method for a particle counter and device for carrying out said method - Google Patents

Evaluation method for a particle counter and device for carrying out said method Download PDF

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Publication number
CA2347740A1
CA2347740A1 CA002347740A CA2347740A CA2347740A1 CA 2347740 A1 CA2347740 A1 CA 2347740A1 CA 002347740 A CA002347740 A CA 002347740A CA 2347740 A CA2347740 A CA 2347740A CA 2347740 A1 CA2347740 A1 CA 2347740A1
Authority
CA
Canada
Prior art keywords
signal
carrying
particle counter
account
particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002347740A
Other languages
French (fr)
Other versions
CA2347740C (en
Inventor
Paul Sahner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydac Filtertechnik GmbH
Original Assignee
Hydac Filtertechnik Gmbh
Paul Sahner
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydac Filtertechnik Gmbh, Paul Sahner filed Critical Hydac Filtertechnik Gmbh
Priority claimed from PCT/EP1998/006670 external-priority patent/WO2000023787A1/en
Publication of CA2347740A1 publication Critical patent/CA2347740A1/en
Application granted granted Critical
Publication of CA2347740C publication Critical patent/CA2347740C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/1012—Calibrating particle analysers; References therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N2015/1486—Counting the particles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N2015/1493—Particle size

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Control Of Conveyors (AREA)

Abstract

The invention relates to an evaluation method for a particle counter, whereby a detector (15) generates a signal 3 in response to the presence of particles in a measuring area in which a liquid flow is conveyed, the sensor signal is treated by a signal processing device (23) and is converted into a display value, taking into account at least one calibration factor. The sensor signal 3 is treated in such a way that the individual residence times of the particles in the measuring zone are determined within a given lapse of time (T) and a summated signal is formed by summating the residence times, whereby said signal is used to represent the display value, taking into account the at least one calibration factor. A device for carrying out the inventive method comprises a signal processing unit (23) with a comparator circuit (K), a clock-pulse generator and a summation device in the form of a pulse counter, for example, in order to form the summated signal.
CA002347740A 1998-10-21 1998-10-21 Evaluation method for a particle counter and device for carrying out said method Expired - Lifetime CA2347740C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1998/006670 WO2000023787A1 (en) 1997-08-13 1998-10-21 Evaluation method for a particle counter and device for carrying out said method

Publications (2)

Publication Number Publication Date
CA2347740A1 true CA2347740A1 (en) 2000-04-27
CA2347740C CA2347740C (en) 2005-05-03

Family

ID=8167102

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002347740A Expired - Lifetime CA2347740C (en) 1998-10-21 1998-10-21 Evaluation method for a particle counter and device for carrying out said method

Country Status (8)

Country Link
EP (1) EP1123498B1 (en)
JP (1) JP2002527768A (en)
KR (1) KR100585575B1 (en)
CN (1) CN1109890C (en)
AT (1) ATE357651T1 (en)
CA (1) CA2347740C (en)
DE (1) DE59813953D1 (en)
ES (1) ES2283080T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3995684B2 (en) * 2004-12-21 2007-10-24 リオン株式会社 Particle counter
US9354221B2 (en) * 2013-04-29 2016-05-31 General Electric Company Turbomachine lubricating oil analyzer system, computer program product and related methods
CN104050503B (en) * 2014-06-26 2017-04-12 江苏大学 Grain counting sensor based on collision sound recognition
CN106468648B (en) * 2015-08-19 2019-09-10 财团法人工业技术研究院 Micro-particle detector and method for manufacturing screening element
CN108152166B (en) * 2017-11-24 2020-05-15 中国电子科技集团公司第四十八研究所 Elastic flow type gas-liquid two-phase flow gas-phase volume measuring device and measuring method
CN109323975B (en) * 2018-11-07 2021-05-25 中国科学院合肥物质科学研究院 OPC (optical proximity correction) counting correction method based on echo threshold comparison

Also Published As

Publication number Publication date
EP1123498A1 (en) 2001-08-16
ES2283080T3 (en) 2007-10-16
CN1109890C (en) 2003-05-28
CA2347740C (en) 2005-05-03
DE59813953D1 (en) 2007-05-03
EP1123498B1 (en) 2007-03-21
CN1314996A (en) 2001-09-26
KR20010106525A (en) 2001-11-29
KR100585575B1 (en) 2006-06-02
JP2002527768A (en) 2002-08-27
ATE357651T1 (en) 2007-04-15

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Effective date: 20181022