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EP1370856A2 - Dispositif d'analyse de fluides - Google Patents

Dispositif d'analyse de fluides

Info

Publication number
EP1370856A2
EP1370856A2 EP02732496A EP02732496A EP1370856A2 EP 1370856 A2 EP1370856 A2 EP 1370856A2 EP 02732496 A EP02732496 A EP 02732496A EP 02732496 A EP02732496 A EP 02732496A EP 1370856 A2 EP1370856 A2 EP 1370856A2
Authority
EP
European Patent Office
Prior art keywords
sensor
interface module
processor
measuring
signal
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.)
Withdrawn
Application number
EP02732496A
Other languages
German (de)
English (en)
Inventor
Dieter Binz
Vogel Albrecht
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.)
ABB Research Ltd Switzerland
Original Assignee
ABB Research Ltd Switzerland
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 ABB Research Ltd Switzerland filed Critical ABB Research Ltd Switzerland
Publication of EP1370856A2 publication Critical patent/EP1370856A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/14—Suction devices, e.g. pumps; Ejector devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N2001/1031—Sampling from special places
    • G01N2001/1043—Sampling from special places from sewers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/49—Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species

Definitions

  • the invention relates to a device for examining liquids according to the preamble of patent claim 1.
  • Such a device is used, for example, for monitoring liquids in sewage treatment plants.
  • colorimetric test devices have been used to check liquids. They consist of a test cell, a precisely weighed mixture of chemical reagents in solid or liquid form, optimally selected for the measuring task, and an evaluation and display device.
  • a small amount of the liquid to be examined is poured into the cuvette, mixed with the reagents, shaken or, if necessary, additionally heated.
  • a color reaction develops, the strength of which is characteristic of the component to be detected in the liquid.
  • the color intensity is determined with the evaluation and display device and converted into a concentration of the substance sought.
  • Disadvantages of this type of liquid analysis are the relatively complicated procedure for the measurement, which requires laboratory technician knowledge, as well as the high price for the evaluation and display device.
  • Test strips based on paper or plastic are also known.
  • certain chemical reagents specific to the substance to be detected are applied to the paper at one end.
  • the test strips are immersed in the liquid to be examined. If the substance sought is contained in the liquid in a not negligible concentration, it develops a color reaction with the reagents on the paper, the intensity of which is a measure of the concentration of the substance sought in the liquid. No sample has to be taken the test strip can be dipped directly into the liquid to be examined.
  • a well-known example of this type of liquid test is the pH test stick.
  • the disadvantage of the test sticks is that only simple ion-selective reactions can be carried out. It cannot be used to determine biological parameters such as the biological oxygen demand or more complex chemical parameters such as the chemical oxygen demand of a liquid.
  • the invention is based on the object of demonstrating a device with which liquids can be checked very precisely, simply and inexpensively, even at a very great distance from permanently installed evaluation devices.
  • the invention is explained in more detail using a schematic drawing.
  • the only figure belonging to the description shows a device 1 which has a sensor 2 and a structural unit 3.
  • the assembly 3 is externally delimited by a housing 3G, in which an evaluation device 4 and an interface module 5 are integrated.
  • the sensor 2 is designed as a flat component and made of plastic, ceramic or silicon.
  • the thickness of the sensor 2 is approximately five millimeters.
  • its surface 2S has a size of 5 ⁇ 8 cm 2 . If necessary, its dimensions can also be chosen differently.
  • the sensor 2 is provided with an inlet opening 20. Via this inlet opening 20, a defined amount of a liquid 100 can be introduced into a sample receiving channel 21, which directly adjoins the inlet opening 20.
  • a mechanical pump 22 is integrated in the sample receiving channel 21. It is formed by a recess in the surface 2S and a film stretched over it (not shown here).
  • a current measuring device 28 is connected in parallel to the electrodes 25A and 25B.
  • a signal line 29 is connected to its signal output, the free end of which is also connected to a plug connection 30.
  • the measuring channel 24 is provided at its second end with an outlet opening 31 from which the liquid 100 can emerge again.
  • a heating element 32 is integrated in the sensor 2, which is connected to an electrical supply line 33, the free end of which is provided with a plug connection 34.
  • a temperature sensor 35 is also provided. Its signal output is connected to a signal line 36, the free end of which is also provided with a plug connection 37.
  • a coding device 38 is provided, the signal outputs of which also have plug connections 39.
  • the surface 2S of the sensor 2 is provided with recesses (not shown here) into which the current measuring device 28, the heating element 32, the temperature sensor 35, the coding device 38, how the electrical conductor tracks 26, 29, 33 and 36 are embedded.
  • the sample receiving channel 21, the pump 22 and the measuring channel 24 are also formed by recesses (not shown here).
  • a film (not shown here) is provided which spans the surface 2S and is firmly connected to the edges thereof. Only the inlet opening 20 and the outlet opening 31 as well as the plug connections 27, 30, 34, 37 and 39 remain freely accessible.
  • the plug connections 27, 30, 34, 37 and 39 of the sensor 2 and the interface module 5 are arranged mirror-symmetrically to one another.
  • the sensor 2 can be connected to the evaluation device 4 via the interface module 5. If the circumstances require, however, the sensor 2 and the interface module 5 can also form a structural unit (not shown here). However, since the sensor 2 is thrown away after the single use, the assembly 3 is the less expensive variant.
  • the plug connections 27, 30, 34, 37 and 39 of the sensor 2 can be electrically and mechanically connected to the plug connections 27, 30, 34, 37 and 39 of the interface module 5 by plugging them into an insert 40 at the first end of the housing 3G , within which the plug connections 27, 30, 34, 37 and 39 of the interface module 5 are arranged.
  • the interface module 5 is designed as a flat component which is made of plastic in the exemplary embodiment shown here. It is equipped with a voltage regulator 43, a preamplifier 45 and a processor 47.
  • the voltage regulator 43, the preamplifier 45 and the processor 47 are embedded in recesses (not shown here) which are formed in the surface 5S of the interface module 5.
  • the same also applies to the conductor tracks 44 to 56. However, these can also be guided on the surface 5S.
  • the surface 5S of the interface module 5 is completely closed to the outside by a cover plate (not shown here), which is also made of plastic.
  • the plug connections 27 and 34 are connected to the voltage regulator 43 via electrical interconnects 41 and 42.
  • the plug connection 30 is connected via an electrical interconnect 44 to the preamplifier 45, the output of which is connected to a first signal input 46 of the processor 47.
  • the plug connections 37 and 39 are connected to signal inputs 50 and 51 of the processor 47.
  • the heating element 3 and the electrodes 25A and 25B of the measuring device 25 can thus be connected to the voltage regulator 43 of the interface module 5 via the plug connections 27, 30, 34, 37 and 39, while the current measuring device 28, the temperature sensor 35 and the coding device 38 are also connected the processor 47 can be connected.
  • the current measuring device 28 integrated in the sensor 2 can also be arranged within the interface module 5, specifically between the plug connection 29 and the signal input of the preamplifier. This can be useful if the sensor 2 is only used for one measurement and is then thrown away.
  • a computer is used as the evaluation device 4, the dimensions of which roughly correspond to those of a mobile radio device and which can also have a mobile radio function.
  • a palm computer for example, which is equipped with a mobile radio function, can be used as the evaluation device 4.
  • any other evaluation device 4 which has these functions and is also provided with correspondingly small dimensions can also be used.
  • the evaluation device 4 shown here is provided with a data memory 61, a voltage supply unit 62 and a display device 63. It also has an operating system, a processor and components for mobile radio (not shown here).
  • the voltage regulator 43 of the interface module 5 is connected to the voltage supply unit 62 via an electrical conductor track 56, while the processor 47 of the interface module 5 is connected to the data memory 61 of the evaluation device 4 via a serial signal line 54.
  • the mode of operation of the device 1 is explained below. If the biological oxygen requirement of the liquid 100, which is located, for example, in a basin of a sewage treatment plant (not shown here) is to be determined with the sensor 2, the sensor 2 is connected via the plug connections 27, 30, 34, 37, 39, 55 and 57 electrically and mechanically connected to the unit 3. The sensor 2 is then immersed so far in the liquid 100 that the inlet opening 20 is therein is arranged. The pump 22 is actuated with a finger pressure and the sample receiving channel 21 is emptied. After the pump is released, liquid 100 is sucked into the sample receiving channel 21, which then flows into the measuring channel 24. An electrical voltage is applied to the electrodes 25A and 25B of the measuring device 25.
  • the size of the voltage can be set with the voltage regulator 43 of the interface module 5.
  • the reaction of the liquid 100 with enzymes, bacteria or other reactants that are located in the measuring channel 24, the organic molecules that are in the liquid 100 are split into smaller molecules.
  • the applied voltage causes these split molecules to oxidize.
  • the oxides formed cause a current to flow between the electrodes 25A and 25B, the magnitude of which is detected by the ammeter 28.
  • the size of the current is directly proportional to the amount of oxides contained in the measuring channel 24.
  • the measurement signal of the measuring device 25 is fed via the preamplifier 45 to the processor 47 of the interface module 5, and from there is forwarded to the data memory 61 of the evaluation device 4 for storing the data.
  • the measured values can be evaluated in the evaluation device 4 and displayed on the display device 63.
  • Information about the sensor 2 can be queried at the coding device 38. It is information about the measuring range, the measuring parameters, the number of measurements that can still be carried out or have already been carried out, the batch number, the date of manufacture and the duration of the usability of the sensor 2.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Molecular Biology (AREA)
  • Emergency Medicine (AREA)
  • Biomedical Technology (AREA)
  • Hydrology & Water Resources (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un dispositif d'analyse de fluides (100). Une analyse précise de fluides (100) n'est jusqu'à aujourd'hui possible qu'aux endroits où se trouvent des dispositifs d'évaluation fixes. Le dispositif (1) de la présente invention permet de palier à cet inconvénient. Ce dispositif est équipé d'un capteur (2), pourvu d'un dispositif de mesure (25) au moyen duquel chaque fluide (100) peut être analysé. Ce capteur (2) est relié électriquement et mécaniquement à une unité modulaire (3), dont la dimension n'est que légèrement supérieure à celle d'un appareil radiotéléphonique mobile. Cette unité modulaire (3) intègre un dispositif d'évaluation (4) et un module d'interface (5). Les signaux de mesure du capteur (2) sont détectés par le module d'interface (5), enregistrés dans le dispositif d'évaluation (4), évalués et affichés sur un dispositif d'affichage (63).
EP02732496A 2001-03-20 2002-03-19 Dispositif d'analyse de fluides Withdrawn EP1370856A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10113646 2001-03-20
DE10113646A DE10113646A1 (de) 2001-03-20 2001-03-20 Vorrichtung zum Untersuchen von Flüssigkeiten
PCT/EP2002/002986 WO2002074043A2 (fr) 2001-03-20 2002-03-19 Dispositif d'analyse de fluides

Publications (1)

Publication Number Publication Date
EP1370856A2 true EP1370856A2 (fr) 2003-12-17

Family

ID=7678318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732496A Withdrawn EP1370856A2 (fr) 2001-03-20 2002-03-19 Dispositif d'analyse de fluides

Country Status (4)

Country Link
US (1) US6950762B2 (fr)
EP (1) EP1370856A2 (fr)
DE (1) DE10113646A1 (fr)
WO (1) WO2002074043A2 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20217612U1 (de) 2002-11-13 2003-04-10 Centec GmbH, 63477 Maintal Messeinrichtung zur Schall-, Dichte-, Durchfluss- und/oder Temperaturmessung
ES2231014A1 (es) * 2003-10-21 2005-05-01 Universidade De Vigo Dispositivo para determinar el riesgo de mareas rojas.
WO2005075944A1 (fr) * 2004-01-28 2005-08-18 Vega Grieshaber Kg Dispositif d'alimentation pour capteurs de commutation a basse puissance d'un systeme modulaire
DE202005003264U1 (de) * 2005-02-25 2005-06-23 Gneuß Kunststofftechnik GmbH Messsystem mit einem Sensor und einem diesem zugeordneten Messverstärker
DE102008050092A1 (de) 2008-10-06 2010-04-08 Hach Lange Gmbh Mobile Wasser-Analyseanordnung
EP3572801A1 (fr) 2009-08-25 2019-11-27 Hach Lange GmbH Appareil d'analyse de processus
US9612230B2 (en) * 2011-06-21 2017-04-04 Miura Co., Ltd. Water quality measuring device
CN110967337A (zh) * 2019-12-02 2020-04-07 重庆凡聚智能科技有限公司 基于下水道成分检测的毒品检测装置
CN119492411B (zh) * 2024-10-09 2025-12-19 陕西飞机工业有限责任公司 一种测试大气数据系统传感器的设备和方法

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FR2417774A1 (fr) * 1978-02-17 1979-09-14 Delta Scient Gmbh Appareil de mesure pour determiner la teneur en oxygene d'echantillons d'eau
CA1153580A (fr) * 1979-10-29 1983-09-13 Jeremy R. Hill Systeme de mesure a liquide conducteur, et cartes de reference connexes
JPS61122555A (ja) * 1984-11-20 1986-06-10 Denki Kagaku Keiki Co Ltd 多能分析計
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WO1994019684A1 (fr) * 1993-02-25 1994-09-01 Diametrics Medical, Inc. Analyseur medical portatif a reponse immediate
DE4433357C2 (de) * 1994-09-08 1996-07-25 Karsten Karlowski Verfahren zur PC-gestützten Meßwertaufnahme und Meßwertverarbeitung innerhalb des kathodischen Korrosionsschutzes
GB2295232B (en) * 1994-11-15 1999-05-05 Boghos Awanes Manook Continuous multi-parameter monitoring of liquids with a novel sensor cleaning and calibration system
US6193864B1 (en) * 1996-05-16 2001-02-27 Sendx Medical, Inc. Locking sensor cartridge with integral fluid ports, electrical connections, and pump tube
DE19808412A1 (de) * 1998-03-01 1999-09-02 Mega Technologie Gmbh Forschun Mobile Meßeinrichtung für Wasser- und Abwasseranalyse und sonstige Sensorik
US6123820A (en) * 1998-06-05 2000-09-26 Grupo Ch-Werfen, S.A. Sensor cartridges
DE19825898A1 (de) * 1998-06-10 1998-12-10 Ditec Gmbh Vorrichtung zur Aufzeichnung und Übertragung digitalisierter EKG-Daten
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Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
WO2002074043A3 (fr) 2003-02-20
DE10113646A1 (de) 2002-09-26
US6950762B2 (en) 2005-09-27
WO2002074043A2 (fr) 2002-09-26
US20040098211A1 (en) 2004-05-20

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