ES2137965T3 - Dispositivo para detectar una interfase de liquido en un tubo de medida transparente. - Google Patents

Dispositivo para detectar una interfase de liquido en un tubo de medida transparente.

Info

Publication number
ES2137965T3
ES2137965T3 ES93119837T ES93119837T ES2137965T3 ES 2137965 T3 ES2137965 T3 ES 2137965T3 ES 93119837 T ES93119837 T ES 93119837T ES 93119837 T ES93119837 T ES 93119837T ES 2137965 T3 ES2137965 T3 ES 2137965T3
Authority
ES
Spain
Prior art keywords
measuring tube
liquid
equipment
tube
auxiliary fluid
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.)
Expired - Lifetime
Application number
ES93119837T
Other languages
English (en)
Inventor
Friedemann Dr Rer Nat Krause
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.)
Roche Diagnostics GmbH
Original Assignee
Roche Diagnostics GmbH
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 Roche Diagnostics GmbH filed Critical Roche Diagnostics GmbH
Application granted granted Critical
Publication of ES2137965T3 publication Critical patent/ES2137965T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
    • G01F23/2922—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms
    • G01F23/2925—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms using electrical detecting means
    • G01F23/2927—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms using electrical detecting means for several discrete levels, e.g. with more than one light-conducting sensing element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/0099—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor comprising robots or similar manipulators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Robotics (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

Dispositivo para la dosificación automática exacta de pequeñas cantidades de líquido en un aparato de análisis médico, que comprende un dispositivo de detección (2) por medio del cual se detecta automáticamente una interfase de líquido (10) en un tubo de medida transparente (9) con un capilar de un diámetro interior de menos de 1 mm, preferiblemente menos de 0,5 mm, y se genera una señal eléctrica correspondiente a la posición de la interfase (10) en un segmento de detección (8) del tubo de medida (9), con un equipo de iluminación (15) provisto de al menos una fuente de luz (12) para iluminar el tubo de medida (9), un equipo receptor de luz (17) provisto de al menos un receptor de luz que recibe luz que atraviesa el tubo de medida (9) y la transforma en señales eléctricas dependientes de su distribución de intensidad en función del emplazamiento, y una unidad de evaluación (7) para transformar las señales del equipo receptor de luz (17) en una información sobre la posición de la interfase de líquido (10) en el tubo de medida (9), en donde el equipo de iluminación (15) está configurado para la iluminación constante de un segmento de detección (8) del tubo de medida (9) y el equipo receptor de luz (17) presenta un sistema óptico (18) de formación de imagen para formar la imagen del segmento de detección (8) en un plano de imagen (19) y una serie (20) de elementos fotosensibles estrechamente contiguos en el plano de imagen, una abertura de transferencia de líquido (11a) que está en comunicación de fluido con un primer extremo del tubo de medida (9) y sirve para aspirar y expulsar líquido, un equipo de transferencia de fluido auxiliar (16) que está en comunicación de fluido con un segundo extremo del tubo de medida (9) y sirve para la alimentación y succión controladas con precisión de un fluido auxiliar gaseoso o líquido hacia y desde el tubo de medida, y una unidad de mando electrónica (6) mediante la cual se puede activar el equipo de transferencia de fluido auxiliar (16) en función de la señal correspondiente a la posición de la interfase de líquido (10) de tal manera que por la succión o alimentación de fluido auxiliar al tubo de medida se aspiren o expulsen cantidades de líquido definidas con precisión.
ES93119837T 1992-12-19 1993-12-09 Dispositivo para detectar una interfase de liquido en un tubo de medida transparente. Expired - Lifetime ES2137965T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4243247 1992-12-19

Publications (1)

Publication Number Publication Date
ES2137965T3 true ES2137965T3 (es) 2000-01-01

Family

ID=6475952

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93119837T Expired - Lifetime ES2137965T3 (es) 1992-12-19 1993-12-09 Dispositivo para detectar una interfase de liquido en un tubo de medida transparente.

Country Status (5)

Country Link
US (1) US5463228A (es)
EP (1) EP0619476B1 (es)
JP (1) JP2651349B2 (es)
DE (1) DE59309797D1 (es)
ES (1) ES2137965T3 (es)

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Also Published As

Publication number Publication date
US5463228A (en) 1995-10-31
DE59309797D1 (de) 1999-10-28
JP2651349B2 (ja) 1997-09-10
EP0619476B1 (de) 1999-09-22
EP0619476A1 (de) 1994-10-12
JPH06221895A (ja) 1994-08-12

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